Neogale Vison
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The American mink (''Neogale vison'') is a semiaquatic species of
mustelid The Mustelidae (; from Latin , weasel) are a diverse family of carnivoran mammals, including weasels, badgers, otters, polecats, martens, grisons, and wolverines. Otherwise known as mustelids (), they form the largest family in the suborde ...
native to North America, though human introduction has expanded its range to many parts of Europe, Asia, and South America. Because of range expansion, the American mink is classed as a
least-concern species A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wil ...
by the
IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...
. The American mink was formerly thought to be the only extant member of the
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
'' Neovison'' following the extinction of the sea mink (''N. macrodon''), but recent studies, followed by taxonomic authorities, have reclassified it and the sea mink within the genus ''
Neogale ''Neogale'' (colloquially referred to as the New World weasels) is a genus of Carnivora, carnivorous, highly active small Mammal, mammals belonging to the Mustelidae family (which also contains badgers, weasels, martens, otters, and wolverines, ...
'', which also contains a few
New World The term "New World" is used to describe the majority of lands of Earth's Western Hemisphere, particularly the Americas, and sometimes Oceania."America." ''The Oxford Companion to the English Language'' (). McArthur, Tom, ed., 1992. New York: ...
weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets, and European mink. Members of this genus are small, active predators, with long and slend ...
species. The American mink is a
carnivore A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant Plants are the eukaryotes that form the Kingdom (biology), kingdom Plantae; they ar ...
that feeds on rodents, fish, crustaceans, frogs, and birds. In its introduced range in Europe it has been classified as an
invasive species An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native spec ...
linked to declines in
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialize ...
, Pyrenean desman, and water vole populations. It is the animal most frequently farmed for its fur, exceeding the silver fox,
sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaz ...
,
marten A marten is a weasel-like mammal in the genus ''Martes'' within the subfamily Guloninae, in the family Mustelidae. They have bushy tails and large paws with partially retractile claws. The fur varies from yellowish to dark brown, depending on ...
, and
skunk Skunks are mammals in the family Mephitidae. They are known for their ability to spray a liquid with a strong, unpleasant scent from their anal glands. Different species of skunk vary in appearance from black-and-white to brown, cream or gi ...
in economic importance.


Evolution

As a species, the American mink represents a more specialized form than the European mink in the direction of
carnivory A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose nutrition and energy requirements are met by consumption of animal tissues (mainly mu ...
, as indicated by the more developed structure of the skull.
Fossil record A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
s of the American mink go back as far as the
Irvingtonian The Irvingtonian North American Land Mammal Age on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), spanning from 1.8 million – 250,000 years Before Present, BP.
, though the species is uncommon among
Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...
animals. Its fossil range corresponds with the species' current natural range. The American minks of the Pleistocene did not differ much in size or morphology from modern populations, though a slight trend toward increased size is apparent from the Irvingtonian through to the Illinoian and Wisconsinan periods. Although superficially similar to the European mink, studies indicate the European mink's closest relative is the
Siberian weasel The Siberian weasel or kolonok (''Mustela sibirica'') is a medium-sized weasel native to Asia, where it is widely distributed and inhabits various forest habitats and open areas. It is therefore listed as Least Concern on the IUCN Red List. Descr ...
(''kolonok'') of Asia. The American mink has been recorded to
hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two diff ...
ize with European minks and
polecat Polecat is a common name for several mustelid species in the order Carnivora and subfamilies Ictonychinae and Mustelinae. Polecats do not form a single taxonomic rank (i.e. clade). The name is applied to several species with broad similarities t ...
s in captivity, though the hybrid embryos of the American and European minks are usually reabsorbed.


Subspecies

, 15 subspecies are recognised:


Description


Build

The American mink differs from members of the genus ''
Mustela Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets, and European mink. Members of this genus are small, active predators, with long and slender bo ...
'' (
stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine or ermine, is a species of mustelid native to Eurasia and the northern regions of North America. Because of its wide circumpolar distribution, it is listed as Least Concern on th ...
s and
weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets, and European mink. Members of this genus are small, active predators, with long and slend ...
s), as well as the other members of ''
Neogale ''Neogale'' (colloquially referred to as the New World weasels) is a genus of Carnivora, carnivorous, highly active small Mammal, mammals belonging to the Mustelidae family (which also contains badgers, weasels, martens, otters, and wolverines, ...
'', by its larger size and stouter form, which closely approach those of
marten A marten is a weasel-like mammal in the genus ''Martes'' within the subfamily Guloninae, in the family Mustelidae. They have bushy tails and large paws with partially retractile claws. The fur varies from yellowish to dark brown, depending on ...
s. It shares with martens a uniformly enlarged, bushy and somewhat tapering tail, rather than a slender, cylindrical tail with an enlarged bushy tip, as is the case in stoats. The American mink is similar in build to the
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialize ...
, but the tail is longer (constituting 38–51% of its body length). The American mink has a long body, which allows the species to enter the burrows of prey. Its
streamlined Streamlines, streaklines and pathlines are field lines in a fluid flow. They differ only when the flow changes with time, that is, when the flow is not steady flow, steady. Considering a velocity vector field in three-dimensional space in the f ...
shape helps it to reduce water resistance while swimming. The skull is similar to that of the European mink, but is more massive, narrower, and less elongated, with more strongly developed projections and a wider, shorter
cranium The skull, or cranium, is typically a bony enclosure around the brain of a vertebrate. In some fish, and amphibians, the skull is of cartilage. The skull is at the head end of the vertebrate. In the human, the skull comprises two prominent ...
. The upper molars are larger and more massive than those of the European mink. The
dental formula Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiology ...
is . Domestic mink, which are bred in fur farms and are substandard genetically, have 19.6% smaller brains, 8.1% smaller hearts, and 28.2% smaller spleens than wild mink. The feet are broad, with webbed digits. They generally have eight
nipple The nipple is a raised region of tissue on the surface of the breast from which, in lactating females, breast milk, milk from the mammary gland leaves the body through the lactiferous ducts to Breastfeeding, nurse an infant. The milk can flow th ...
s, with one pair of inguinal teats and three pairs of abdominal teats. The adult male's
penis A penis (; : penises or penes) is a sex organ through which male and hermaphrodite animals expel semen during copulation (zoology), copulation, and through which male placental mammals and marsupials also Urination, urinate. The term ''pen ...
is long, and is covered by a sheath. The
baculum The baculum (: bacula), also known as the penis bone, penile bone, ''os penis'', ''os genitale'', or ''os priapi'', is a bone in the penis of many placental mammals. It is not present in humans, but is present in the penises of some primates, ...
is well-developed, being triangular in
cross section Cross section may refer to: * Cross section (geometry) ** Cross-sectional views in architecture and engineering 3D *Cross section (geology) * Cross section (electronics) * Radar cross section, measure of detectability * Cross section (physics) **A ...
and curved at the tip. Males measure in body length, while females measure . The tail measures in males and in females. Weights vary with sex and season, with males being heavier than females. In winter, males weigh and females . Maximum heaviness occurs in autumn.


Fur

The American mink's winter fur is denser, longer, softer, and more close-fitting than that of the European mink. The winter fur's tone is generally very dark blackish-tawny to light-tawny. Colour is evenly distributed over all the body, with the under side being only slightly lighter than the back. The
guard hair Guard hair or overhair is the outer layer of hair of most mammals, which overlay the fur. Guard hairs are long and coarse and protect the rest of the pelage (fur) from abrasion and frequently from moisture. They are visible on the surface of the ...
s are bright and dark-tawny, often approaching black on the spine. The underfur on the back is very wavy and greyish-tawny with a bluish tint. The tail is darker than the trunk and sometimes becomes pure black on the tip. The chin and lower lip are white. Captive individuals tend to develop irregular white patches on the lower surface of their bodies, though escaped individuals from Tartaria gradually lost these patches. The summer fur is generally shorter, sparser and duller than the winter fur. The thick underfur and oily guard hairs render the pelage water-resistant, with the length of the guard hairs being intermediate between those of
otter Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine. Lutrinae is a branch of the Mustelidae family, which includes weasels, badgers, mink, and wolverines, among ...
s and polecats, thus indicating the American mink is incompletely adapted to an aquatic life. It moults twice a year, during spring and autumn. It does not turn white in winter. A variety of different colour mutations have arisen from experimental breeding on fur farms.


Locomotion

On land, the American mink moves by a bounding gait, with speeds of up to . It also climbs trees and swims well. During swimming, the mink propels itself primarily through undulating movements of the trunk. When
diving Diving most often refers to: * Diving (sport), the sport of jumping into deep water * Underwater diving, human activity underwater for recreational or occupational purposes Diving or Dive may also refer to: Sports * Dive (American football), ...
, it undergoes
bradycardia Bradycardia, also called bradyarrhythmia, is a resting heart rate under 60 beats per minute (BPM). While bradycardia can result from various pathological processes, it is commonly a physiological response to cardiovascular conditioning or due ...
, which is likely an adaptation to conserve
oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...
. In warm water (), the American mink can swim for 3 hours without stopping, but in cold water it can die within 27 minutes. It generally dives to depths of for 10 seconds, though depths of 3 m lasting 60 seconds have been recorded. It typically catches fish after five- to 20-second chases.


Senses and scent glands

The American mink relies heavily on
sight Visual perception is the ability to detect light and use it to form an image of the surrounding Biophysical environment, environment. Photodetection without image formation is classified as ''light sensing''. In most vertebrates, visual percept ...
when foraging. Its
eyesight Visual perception is the ability to detect light and use it to form an image of the surrounding environment. Photodetection without image formation is classified as ''light sensing''. In most vertebrates, visual perception can be enabled by ph ...
is clearer on land than underwater. Its auditory perception is high enough to detect the
ultrasonic Ultrasound is sound with frequencies greater than 20 kilohertz. This frequency is the approximate upper audible limit of human hearing in healthy young adults. The physical principles of acoustic waves apply to any frequency range, includi ...
vocalisations (1–16 
kHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base uni ...
) of rodent prey. Its sense of smell is comparatively weak. Its two
anal gland The anal glands or anal sacs are small glands near the anus in many mammals. They are situated in between the external anal sphincter muscle and internal anal sphincter muscle. In non-human mammals, the secretions of the anal glands contain most ...
s are used for
scent marking In ethology, territory is the sociographical area that an animal consistently defends against conspecific competition (or, occasionally, against animals of other species) using agonistic behaviors or (less commonly) real physical aggression. ...
, either through defecation or by rubbing the anal region on the ground. The secretions of the anal glands are composed of 2,2- dimethyl
thietane Thietane is a heterocyclic compound containing a Saturated and unsaturated compounds, saturated four-membered ring with three carbon atoms and one sulfur atom. Some derivatives are of interest as drugs. Thietane, and its derivative 2-propylthiet ...
, 2- ethylthietane, cyclic
disulfide In chemistry, a disulfide (or disulphide in British English) is a compound containing a functional group or the anion. The linkage is also called an SS-bond or sometimes a disulfide bridge and usually derived from two thiol groups. In inorg ...
, 3,3-dimethyl-1,2-dithiacyclopentane, and
indole Indole is an organic compound with the formula . Indole is classified as an aromatic heterocycle. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered pyrrole ring. Indoles are derivatives of indole ...
. When stressed, the American mink can expel the contents of its anal glands at a distance of . Scent glands may also be located on the throat and chest. The smell produced by these scent glands was described by
Clinton Hart Merriam Clinton Hart Merriam (December 5, 1855 – March 19, 1942) was an American zoologist, mammalogist, ornithologist, entomologist, ecologist, ethnographer, geographer, natural history, naturalist and physician. He was commonly known as the "father o ...
as more unbearable than that produced by
skunk Skunks are mammals in the family Mephitidae. They are known for their ability to spray a liquid with a strong, unpleasant scent from their anal glands. Different species of skunk vary in appearance from black-and-white to brown, cream or gi ...
s, and added it was "one of the few substances, of animal, vegetable, or mineral origin, that has, on land or sea, rendered me aware of the existence of the abominable sensation called
nausea Nausea is a diffuse sensation of unease and discomfort, sometimes perceived as an urge to vomit. It can be a debilitating symptom if prolonged and has been described as placing discomfort on the chest, abdomen, or back of the throat. Over 30 d ...
".


Behavior


Social and territorial behaviours

American mink territories are held by individual animals with minimal intrasex overlap, but with extensive overlap between animals of the opposite sex. Most territories are in undisturbed, rocky coastal habitats with broad
littoral zone The littoral zone, also called litoral or nearshore, is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely flood ...
s and dense cover. Some are on estuaries, rivers and canals near urban areas. Home ranges are typically long, with male territories larger than females'. As long as it is close to water, the American mink is not fussy about its choice of den. Mink dens typically consist of long burrows in
river bank In geography, a bank is the land alongside a body of water. Different structures are referred to as ''banks'' in different fields of geography. In limnology (the study of inland waters), a stream bank or river bank is the terrain alongsid ...
s, holes under
log Log most often refers to: * Trunk (botany), the stem and main wooden axis of a tree, called logs when cut ** Logging, cutting down trees for logs ** Firewood, logs used for fuel ** Lumber or timber, converted from wood logs * Logarithm, in mathe ...
s,
tree stump After a tree has been cut and has fallen, the stump or tree stump is usually a small remaining portion of the trunk with the roots still in the ground. Stumps may show the age-defining rings of a tree. The study of these rings is known as dendr ...
s, or
root In vascular plants, the roots are the plant organ, organs of a plant that are modified to provide anchorage for the plant and take in water and nutrients into the plant body, which allows plants to grow taller and faster. They are most often bel ...
s and hollow trees, though dens located in rock crevices, drains, and nooks under stone piles and bridges are occasionally selected. The burrows they dig themselves are typically about four inches in diameter and may continue along for at a depth of . The American mink may nest in burrows dug previously by
muskrat The muskrat or common muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over various climates ...
s,
badger Badgers are medium-sized short-legged omnivores in the superfamily Musteloidea. Badgers are a polyphyletic rather than a natural taxonomic grouping, being united by their squat bodies and adaptions for fossorial activity rather than by the ...
s and
skunk Skunks are mammals in the family Mephitidae. They are known for their ability to spray a liquid with a strong, unpleasant scent from their anal glands. Different species of skunk vary in appearance from black-and-white to brown, cream or gi ...
s, and may also dig dens in old ant hills. The nesting chamber is at the end of a four-inch tunnel, and is about a foot in diameter. It is warm, dry, and lined with straw and feathers. The American mink's dens are characterized by a large number of entrances and twisting passages. The number of exits varies from one to eight. The American mink normally only vocalises during close encounters with other minks or predators. The sounds it emits include piercing shrieks and hisses when threatened and muffled chuckling sounds when mating. Kits squeak repeatedly when separated from their mothers.
Ernest Thompson Seton Ernest Thompson Seton (born Ernest Evan Thompson; August 14, 1860 – October 23, 1946) was a Canadian and American author, wildlife artist, founder of the Woodcraft Indians in 1902 (renamed Woodcraft League of America), and one of the foun ...
reported hearing minks growl and snarl when confronting a threat. During aggressive interactions, mink assert their dominance by arching their backs, puffing up, lashing out their tails, and stomping and scraping the ground with their feet, while also opening their mouth in a threat-gape. Should this be unsuccessful, fights may result, with injuries to the head and neck.


Reproduction and development

The American mink is a promiscuous animal that does not form
pair bond In biology, a pair bond is the strong affinity that develops in some species between a mating pair, often leading to the production and rearing of young and potentially a lifelong bond. Pair-bonding is a term coined in the 1940s that is frequently ...
s. The start of
mating season Seasonal breeders are animal species that successfully mate only during certain times of the year. These times of year allow for the optimization of survival of young due to factors such as ambient temperature, food and water availability, and ch ...
ranges from February in its southern range to April in the north. In its introduced range, the American mink breeds one month earlier than the European mink. Males commonly fight during the mating season, which may result in the formation of loose, temporary dominance hierarchies governing access to receptive females. The mating season lasts for three weeks, with
ovulation Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and ...
being induced by the presence of males. The mating process is violent, with the male typically biting the female on the nape of the neck and pinning her with his forefeet.
Mating In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. '' Copulation'' is the union of the sex organs of two sexually repr ...
lasts from 10 minutes to four hours. Females are receptive for seven- to 10-day intervals during the three-week breeding season, and can mate with multiple males. Along with the
striped skunk The striped skunk (''Mephitis mephitis'') is a skunk of the genus ''Mephitis (genus), Mephitis'' that occurs across much of North America, including southern Canada, the United States, and northern Mexico. It is currently listed as least concern ...
, the American mink is among the only mammals to mate in spring that have a short delay before implantation. This delayed implantation allows pregnant minks to keep track of environmental conditions and select an ideal time and place for
parturition Birth is the act or process of bearing or bringing forth offspring, also referred to in technical contexts as parturition. In mammals, the process is initiated by hormones which cause the muscular walls of the uterus to contract, expelling the f ...
. The
gestation period In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once i ...
lasts from 40 to 75 days, with actual embryonic development taking place for 30–32 days, indicating implantation delay can last from eight to 45 days. The young are born from April to June, in litters consisting of four kits on average. The litters are often multiply sired. Exceptionally large litters of 11 kits have been recorded in Tartaria and 16 in the United States. The kits are blind at birth, weighing six grams and possessing a short coat of fine, silver-white hairs. The kits are dependent on their mother's milk, which contains 3.8%
lipid Lipids are a broad group of organic compounds which include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. The functions of lipids include storing ...
s, 6.2%
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residue (biochemistry), residues. Proteins perform a vast array of functions within organisms, including Enzyme catalysis, catalysing metab ...
, 4.6%
lactose Lactose is a disaccharide composed of galactose and glucose and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from (Genitive case, gen. ), the Latin word for milk, plus the suffix ''-o ...
and 10.66% mineral salts. Their eyes open after 25 days, with
weaning Weaning is the process of gradually introducing an infant human or other mammal to what will be its adult diet while withdrawing the supply of its mother's milk. In the United Kingdom, UK, weaning primarily refers to the introduction of solid ...
occurring after five weeks. The kits begin hunting after 8 weeks of age, but stay close to their mother until autumn, when they become independent. Sexual maturity is attained during the kit's first spring, when they are about 10 months old.


Diet

The American mink is a carnivorous animal that feeds on
rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal specie ...
s, fish,
crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...
s,
amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...
s, and birds. It kills
vertebrate Vertebrates () are animals with a vertebral column (backbone or spine), and a cranium, or skull. The vertebral column surrounds and protects the spinal cord, while the cranium protects the brain. The vertebrates make up the subphylum Vertebra ...
prey by biting the back of the head or neck, leaving canine puncture marks apart. The American mink often kills birds, including larger species like
seagull Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed ...
s and
cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) ado ...
s, by drowning. In its natural range, fish are its primary prey. Although inferior to the
North American river otter The North American river otter (''Lontra canadensis''), also known as the northern river otter and river otter, is a semiaquatic mammal that endemism, lives only on the North American continent throughout most of Canada, along the coasts of the U ...
in hunting fish,
Audubon The National Audubon Society (Audubon; ) is an American non-profit environmental organization dedicated to conservation of birds and their habitats. Located in the United States and incorporated in 1905, Audubon is one of the oldest of such org ...
and Bachman once reported seeing a mink carrying a foot-long
trout Trout (: trout) is a generic common name for numerous species of carnivorous freshwater ray-finned fishes belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of which are members of the subfamily Salmoninae in the ...
. Mink inhabiting the
prairie Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the ...
sloughs primarily target frogs,
tadpole A tadpole or polliwog (also spelled pollywog) is the Larva, larval stage in the biological life cycle of an amphibian. Most tadpoles are fully Aquatic animal, aquatic, though some species of amphibians have tadpoles that are terrestrial animal, ...
s, and mice. It is a formidable predator of
muskrat The muskrat or common muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over various climates ...
s, which are chased underwater and killed in their own burrows. Among the rodents killed by the American mink in its native range are rats and mice of the
genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...
'' Hesperomys'', ''
Microtus ''Microtus'' is a genus of voles found in North America, Europe and northern Asia. The genus name refers to the small ears of these animals. They are stout rodents with short ears, legs and tails. They eat green vegetation such as grasses and se ...
'', '' Sigmodon'', and ''
Neotoma A pack rat or packrat, also called a woodrat or trade rat, are any species in the North and Central American rodent genus ''Neotoma''. Pack rats have a rat-like appearance, with long tails, large ears, and large, black eyes. Pack rats are notice ...
''.
Marsh rabbit The marsh rabbit (''Sylvilagus palustris'') is a small cottontail rabbit found in marshes and swamps of coastal regions of the Eastern and Southern United States. It is a strong swimmer and found only near regions of water. It is similar in app ...
s are frequently taken in marshy or swampy tracts. In Tartaria, the American mink's most important food items are
vole Voles are small rodents that are relatives of lemmings and hamsters, but with a stouter body; a longer, hairy tail; a slightly rounder head; smaller eyes and ears; and differently formed molars (high-crowned with angular cusps instead of lo ...
s, fish, crustaceans, frogs, and aquatic insects. In winter, aquatic foods predominate, while land-based prey increases in importance during the spring. Within the
Altai Mountains The Altai Mountains (), also spelled Altay Mountains, are a mountain range in Central Asia, Central and East Asia, where Russia, China, Mongolia, and Kazakhstan converge, and where the rivers Irtysh and Ob River, Ob have their headwaters. The ...
, the American mink feeds predominantly on mammals such as rodents, shrews, and moles, as well as birds, reptiles, amphibians, and fish. Among the 11 different bird species preyed upon by minks in Altai are
dipper Dippers are members of the genus ''Cinclus'' in the bird family Cinclidae, so-called because of their bobbing or dipping movements. They are unique among passerines for their ability to dive and swim underwater. Taxonomy The genus ''Cinclus'' ...
s and pine grosbeaks. Among fish, small species predominate in the diet of minks in Altai, and include
minnow Minnow is the common name for a number of species of small freshwater fish, belonging to several genus, genera of the family Cyprinidae and in particular the subfamily Leuciscinae. They are also known in Ireland as wikt:pinkeen, pinkeens. While ...
s,
gudgeon A gudgeon is a socket-like, cylindrical (i.e., ''female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...
s, and wide-headed
sculpin A sculpin is a type of fish that belongs to the superfamily Cottoidea in the order Perciformes.Kane, E. A. and T. E. Higham. (2012)Life in the flow lane: differences in pectoral fin morphology suggest transitions in station-holding demand acros ...
s. In the Sverdlovsk and
Irkutsk Oblast Irkutsk Oblast (; ) is a federal subjects of Russia, federal subject of Russia (an oblast), located in southeastern Siberia in the basins of the Angara River, Angara, Lena River, Lena, and Nizhnyaya Tunguska Rivers. The administrative center is ...
s, mouse-like rodents are their most important foods, followed by birds, fish and insects. In the
Russian Far East The Russian Far East ( rus, Дальний Восток России, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in North Asia. It is the easternmost part of Russia and the Asia, Asian continent, and is coextensive with the Far Easte ...
, where crustaceans are scarce, the American mink feeds extensively on
amphipod Amphipoda () is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods () range in size from and are mostly detritivores or scavengers. There are more than 10,700 amphipod species cur ...
s. In the
British Isles The British Isles are an archipelago in the Atlantic Ocean, North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner Hebrides, Inner and Outer Hebr ...
, dietary composition varies seasonally and regionally.
European rabbit The European rabbit (''Oryctolagus cuniculus'') or coney is a species of rabbit native to the Iberian Peninsula (Spain, Portugal and Andorra) and southwestern France. It is the only extant species in the genus ''Oryctolagus''. The European rab ...
s are the most commonly taken prey in areas where they are common, especially in summer. A range of small rodents and insectivores are preyed upon, but to a lesser degree.
European hare The European hare (''Lepus europaeus''), also known as the brown hare, is a species of hare native to Europe and parts of Asia. It is among the largest hare species and is adapted to temperate, open country. Hares are herbivorous and feed mainly ...
s are occasionally attacked. Minks in Britain prey on several bird species, with ducks,
moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen." They are close relatives of coots. They are ...
s, and
coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usual ...
s being most frequently targeted on lakes and rivers, while
gull Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed ...
s are taken in coastal habitats. Marine species preyed upon in Britain include
European eel The European eel (''Anguilla anguilla'') is a species of eel. Their life history was a mystery for thousands of years, and mating in the wild has not yet been observed. The five stages of their development were originally thought to be differe ...
s, rock-pool fish such as
blenny Blennies (from the Greek and , mucus, slime) are a diverse clade of ray-finned fish in the suborder Blennioidei of the percomorph order Blenniiformes. They inhabit marine, brackish, and occasionally freshwater habitats, and generally share sim ...
, shore crabs and
crayfish Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some spe ...
. American minks have been implicated in the decline of the water vole in the United Kingdom and linked to the decline of waterfowl across their range in Europe. They are now considered vermin in much of Europe and are hunted for the purpose of
wildlife management Wildlife management is the management process influencing interactions among and between wildlife, its Habitat, habitats and people to achieve predefined impacts. Wildlife management can include wildlife conservation, population control, gamekeepi ...
. In South America's Cape Horn Biosphere Reserve, mammals, including both native and exotic rodents, are the American mink's main prey throughout the year, though birds are of equal importance during their summer nesting periods. The American mink may pose a threat to poultry. According to
Clinton Hart Merriam Clinton Hart Merriam (December 5, 1855 – March 19, 1942) was an American zoologist, mammalogist, ornithologist, entomologist, ecologist, ethnographer, geographer, natural history, naturalist and physician. He was commonly known as the "father o ...
and
Ernest Thompson Seton Ernest Thompson Seton (born Ernest Evan Thompson; August 14, 1860 – October 23, 1946) was a Canadian and American author, wildlife artist, founder of the Woodcraft Indians in 1902 (renamed Woodcraft League of America), and one of the foun ...
, although the American mink is a potential poultry thief, it is overall less damaging than the
stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine or ermine, is a species of mustelid native to Eurasia and the northern regions of North America. Because of its wide circumpolar distribution, it is listed as Least Concern on th ...
. Unlike the stoat, which often engages in surplus killing, the mink usually limits itself to killing and eating one fowl during each attack. Studies in Britain indicate poultry and game birds only constitute 1% of the animals' overall diets; small mammals, especially rabbits, tend to dominate, followed by fish and birds, especially
moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen." They are close relatives of coots. They are ...
s and
coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usual ...
s.


Relationships with other predators

The American mink replaces and sometimes kills the European mink wherever their ranges overlap. The decline of European mink populations seems to coincide with the spread of the American mink, but "The early declines in Central Europe and later in Finland took place before the spread of the American mink." The diets of the American mink and
European otter The Eurasian otter (''Lutra lutra''), also known as the European otter, Eurasian river otter, European river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia and the Maghreb. The most widely distributed member o ...
overlap to a great extent. In areas where these two species are sympatric, competition with the otter for fish causes the American mink to hunt land-based prey more frequently. Large
birds of prey Birds of prey or predatory birds, also known as (although not the same as) raptors, are hypercarnivorous bird species that actively predation, hunt and feed on other vertebrates (mainly mammals, reptiles and smaller birds). In addition to speed ...
, such as
bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche ...
s (''Haliaeetus leucocephalus'') and
great horned owl The great horned owl (''Bubo virginianus''), also known as the tiger owl (originally derived from early naturalists' description as the "winged tiger" or "tiger of the air") or the hoot owl, is a large owl native to the Americas. It is an extreme ...
s (''Bubo virginianus'') occasionally hunt American mink. In
Finland Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...
,
white-tailed eagle The white-tailed eagle (''Haliaeetus albicilla''), sometimes known as the 'sea eagle', is a large bird of prey, widely distributed across temperate Eurasia. Like all eagles, it is a member of the family Accipitridae (or accipitrids) which also ...
s (''Haliaeetus albicilla'') have become the main natural control and may inhibit the mink from breeding via heavy predation.
Eurasian eagle-owl The Eurasian eagle-owl (''Bubo bubo'') is a species of eagle-owl, a type of bird that resides in much of Eurasia. It is often just called the eagle-owl in Europe and Asia. It is one of the largest species of owl. Females can grow to a total le ...
s (''Bubo bubo'') also can be predators of mink in the introduced regions.


Intelligence

An early behavioral study was performed in the 1960s to assess visual learning ability in minks,
ferret The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), as evidenced by the ferret's ability to inter ...
s, skunks, and house cats. Animals were tested on their ability to recognize objects, learn their valences and make object selections from memory. Minks were found to outperform ferrets, skunks, and cats in this task, but this letter (short paper) fails to account for a possible conflation of a cognitive ability (decision making,
associative learning Learning is the process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences. The ability to learn is possessed by humans, non-human animals, and some machines; there is also evidence for some kin ...
) with a largely perceptual ability ( invariant object recognition).


Range


Natural

The species' natural range encompasses most of North America, from
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
, through Canada and further into the United States except
Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
and the more arid areas of California,
Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...
,
Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...
,
New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
, and
West Texas West Texas is a loosely defined region in the U.S. state of Texas, generally encompassing the desert climate, arid and semiarid climate, semiarid lands west of a line drawn between the cities of Wichita Falls, Texas, Wichita Falls, Abilene, Texa ...
.


Introduced


Argentina

The American mink was deliberately introduced for commercial fur production in several provinces of
Patagonia Patagonia () is a geographical region that includes parts of Argentina and Chile at the southern end of South America. The region includes the southern section of the Andes mountain chain with lakes, fjords, temperate rainforests, and glaciers ...
in 1930. The animals escaped or were released from farms in
Chubut Province Chubut ( from Tehuelche language, Tehuelche 'transparent'; ) is a provinces of Argentina, province in southern Argentina, situated between the 42nd parallel south (the border with Río Negro Province), the 46th parallel south (bordering Santa ...
and now occur in the Chubut and
Río Negro Province Río Negro (, ''Black River'') is a province of Argentina, located in northern Patagonia. Neighboring provinces are from the south clockwise Chubut, Neuquén, Mendoza, La Pampa and Buenos Aires. To the east lies the Atlantic Ocean. Its cap ...
s and
Tierra del Fuego Tierra del Fuego (, ; Spanish for "Land of Fire", rarely also Fireland in English) is an archipelago off the southernmost tip of the South America, South American mainland, across the Strait of Magellan. The archipelago consists of the main is ...
. In
Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...
the mink is one of the major menaces of the Hooded grebe, which risks becoming
extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...
.


South Chile

In Chile, American minks were introduced to
Magallanes Region The Magallanes Region (), officially the Magallanes y la Antártica Chilena Region () or Magallanes and the Chilean Antarctica Region in English, is one of Chile's 16 first order administrative divisions. It is the southernmost, largest, and sec ...
in the 1930s. Ever since minks were freed into nature during the crisis of the fur industry the mink has expanded its range across Chile. Actually it ranges from
Araucanía Region The Araucanía ( ), La Araucanía Region ( ) is one of Chile's 16 first-order administrative divisions, and comprises two provinces: Malleco in the north and Cautín in the south. Its capital and largest city is Temuco; other important cities ...
in the north to Magallanes Region in the south. However, there are isolated territories in between where the mink is not found, probably due to biogeographic barriers. One of the latest areas where the mink has been found is Chiloé Archipelago,- minks were reported there for the first time 2013, making scientists suspect they may have arrived on a ship.


Western Europe

Feral A feral (; ) animal or plant is one that lives in the wild but is descended from domesticated individuals. As with an introduced species, the introduction of feral animals or plants to non-native regions may disrupt ecosystems and has, in som ...
American minks in Europe are thought to be of
domesticated Domestication is a multi-generational mutualistic relationship in which an animal species, such as humans or leafcutter ants, takes over control and care of another species, such as sheep or fungi, to obtain from them a steady supply of reso ...
stock derived from the ''N. v. vison'', ''N. v. melampeplus'' and ''N. v. ingens'' subspecies. The first specimens were imported to Europe in 1920 for fur-farming purposes. The American mink was introduced in Italy in the 1950s, and currently resides mostly in the northeastern part of the Italian Peninsula. The majority of these populations do not appear to be self-sufficient, though minks in the
Monti Prenestini The Monti Prenestini is a mountain range in the Lazio sub-Apennines, in central Italy to the east of Rome. It is of limestone formation. It is bounded by the Monti Tiburtini to the north, by the Monti Ruffi to the east, and by the valley of the ...
and Simbruini in Lazio have reproduced successfully. Escapees of fur farms established a self-sustaining and expanding population on the
Iberian Peninsula The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, comprisin ...
by the second half of the 20th century. In 2013, the Spanish government announced a plan to eradicate the species, as a means to protect the falling populations of European mink and other endangered species affected such as the Pyrenean desman. The first mink farm in Norway was built in 1927, with escapees establishing wild populations within 30 years of its establishment. The first feral mink populations arose in 1930, establishing territories in southwestern Norway. These feral minks, augmented by further escapees, formed the basis of a strong population in
Hordaland Hordaland () was a county in Norway, bordering Sogn og Fjordane, Buskerud, Telemark, and Rogaland counties. Hordaland was the third largest county, after Akershus and Oslo, by population. The county government was the Hordaland County Munici ...
by the end of
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. Feral mink colonised eastern Norway in 1930 and had become established in most southeastern counties in the early 1940s. By 1950, feral mink reached central Norway, with further populations occurring in the northern counties of
Nordland Nordland (; , , , ) is one of the three northernmost Counties of Norway, counties in Norway in the Northern Norway region, bordering Troms in the north, Trøndelag in the south, Norrbotten County in Sweden to the east, Västerbotten County to t ...
and
Troms Troms (; ; ; ) is a Counties of Norway, county in northern Norway. It borders Finnmark county to the northeast and Nordland county in the southwest. Norrbotten Län in Sweden is located to the south and further southeast is a shorter border with ...
. During the post-World War II period until 1965, mink had colonised most of the country. In modern times, the American mink occupies all of the Norwegian mainland, but is absent on some islands. The American mink was first imported to Great Britain in 1929, though a series of escapes and releases led to the establishment of a self-sufficient feral population in
Devon Devon ( ; historically also known as Devonshire , ) is a ceremonial county in South West England. It is bordered by the Bristol Channel to the north, Somerset and Dorset to the east, the English Channel to the south, and Cornwall to the west ...
by the late 1950s, and others by the early 1960s. In Ireland, the American mink was not farmed until the early 1950s, thus feral populations established themselves there much later. The species is now widespread in mainland Great Britain and Ireland, though some places remain uncolonised. It has established itself on a few islands, including Arran and
Lewis and Harris Lewis and Harris (), or Lewis with Harris, is a Scottish island in the Outer Hebrides, around from the Scottish mainland. With an area of (approximately 1% the size of Great Britain) it is the largest island in Scotland and the list of isl ...
. Until 2005, mink hunting with packs of hounds occurred in the UK. The total mink population in Great Britain is estimated at 110,000 (England: 46,750;
Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
: 52,250;
Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...
: 9,750). This population may be declining as
European otter The Eurasian otter (''Lutra lutra''), also known as the European otter, Eurasian river otter, European river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia and the Maghreb. The most widely distributed member o ...
numbers increase. There are no estimates for the mink population in Ireland, but it is thought to be low, because of Ireland's strong otter population.


Former USSR

In 1933, American minks were released into the
Voronezh Oblast Voronezh Oblast is a federal subjects of Russia, federal subject of Russia (an oblast). Its administrative center is the types of inhabited localities in Russia, city of Voronezh. Its population was 2,308,792 as of the Russian Census (2021), 20 ...
in
European Russia European Russia is the western and most populated part of the Russia, Russian Federation. It is geographically situated in Europe, as opposed to the country's sparsely populated and vastly larger eastern part, Siberia, which is situated in Asia ...
. Until 1963, more minks were introduced in various quantities in the
Voronezh Voronezh ( ; , ) is a city and the administrative centre of Voronezh Oblast in southwestern Russia straddling the Voronezh River, located from where it flows into the Don River. The city sits on the Southeastern Railway, which connects wes ...
and
Arkhangelsk Oblast Arkhangelsk Oblast ( rus, Архангельская область, p=ɐrˈxanɡʲɪlʲskəjə ˈobɫəsʲtʲ) is a federal subjects of Russia, federal subject of Russia (an oblast). It includes the Arctic Ocean, Arctic archipelagos of Franz ...
s,
Karelia Karelia (; Karelian language, Karelian and ; , historically Коре́ла, ''Korela'' []; ) is an area in Northern Europe of historical significance for Russia (including the Soviet Union, Soviet era), Finland, and Sweden. It is currentl ...
, in Kalininsk, Saratov Oblast, Kalininsk, Gorkovsk, Volgograd Oblast, Volgograd and
Chelyabinsk Oblast Chelyabinsk Oblast; , is a federal subjects of Russia, federal subject (an oblast) of Russia in the Ural Mountains region, on the border of Europe and Asia. Its administrative center is the types of inhabited localities in Russia, city of Chel ...
s, and into
Tatarstan Tatarstan, officially the Republic of Tatarstan, sometimes also called Tataria, is a Republics of Russia, republic of Russia located in Eastern Europe. It is a part of the Volga Federal District; and its capital city, capital and largest city i ...
and Bashkir, as well as the Lithuanian and
Byelorussian SSR The Byelorussian Soviet Socialist Republic (BSSR, Byelorussian SSR or Byelorussia; ; ), also known as Soviet Belarus or simply Belarus, was a republic of the Soviet Union (USSR). It existed between 1920 and 1922 as an independent state, and ...
s. Beyond the
Urals The Ural Mountains ( ),; , ; , or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through Russia, from the coast of the Arctic Ocean to the river Ural (river), Ural and northwestern Kazakhstan.
, American minks were introduced in the Sverdlovsk,
Tyumen Tyumen ( ; rus, Тюмень, p=tʲʉˈmʲenʲ, a=Ru-Tyumen.ogg) is the administrative center and largest types of inhabited localities in Russia, city of Tyumen Oblast, Russia. It is situated just east of the Ural Mountains, along the Tura ( ...
,
Omsk Omsk (; , ) is the administrative center and largest types of inhabited localities in Russia, city of Omsk Oblast, Russia. It is situated in southwestern Siberia and has a population of over one million. Omsk is the third List of cities and tow ...
,
Kemerovo Kemerovo ( rus, Ке́мерово, p=ˈkʲemʲɪrəvə) is an industrial types of inhabited localities in Russia, city and the administrative center of Kemerovo Oblast, Russia, located at the confluence of the Iskitimka River, Iskitimka and Tom ...
,
Novosibirsk Novosibirsk is the largest city and administrative centre of Novosibirsk Oblast and the Siberian Federal District in Russia. As of the 2021 Russian census, 2021 census, it had a population of 1,633,595, making it the most populous city in Siber ...
, Chita and
Irkutsk Oblast Irkutsk Oblast (; ) is a federal subjects of Russia, federal subject of Russia (an oblast), located in southeastern Siberia in the basins of the Angara River, Angara, Lena River, Lena, and Nizhnyaya Tunguska Rivers. The administrative center is ...
s, in the Altai and
Krasnoyarsk Krai Krasnoyarsk Krai (, ) is a federal subjects of Russia, federal subject (a krai) of Russia located in Siberia. Its administrative center is the types of inhabited localities in Russia, city of Krasnoyarsk, the second-largest city in Siberia after ...
, in the Tuvan, Buryat and
Yakut Autonomous Soviet Socialist Republic The Yakut Autonomous Soviet Socialist Republic (; ), also known as Soviet Sakha, Soviet Yakutia or the Yakut ASSR (, ''Yakutskaya ASSR''), was an autonomous republic of the Russian SFSR within the Soviet Union. History The Yakut ASSR was formed ...
s, into the
Magadan Magadan ( rus, Магадан, p=məɡɐˈdan) is a Port of Magadan, port types of inhabited localities in Russia, town and the administrative centre of Magadan Oblast, Russia. The city is located on the isthmus of the Staritsky Peninsula by the ...
,
Kamchatka The Kamchatka Peninsula (, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and western coastlines, respectively. Immediately offshore along the Pacific ...
and
Amur Oblast Amur Oblast () is a federal subject of Russia (an oblast), located on the banks of the Amur and Zeya rivers in the Russian Far East. The oblast borders Heilongjiang province of the People's Republic of China (PRC) to the south. The administrati ...
s, into the
Khabarovsk Khabarovsk ( ) is the largest city and the administrative centre of Khabarovsk Krai, Russia,Law #109 located from the China–Russia border, at the confluence of the Amur and Ussuri Rivers, about north of Vladivostok. As of the 2021 Russian c ...
and
Primorsky Krai Primorsky Krai, informally known as Primorye, is a federal subjects of Russia, federal subject (a krais of Russia, krai) of Russia, part of the Far Eastern Federal District in the Russian Far East. The types of inhabited localities in Russia, ...
, into the
Chukotka Autonomous Okrug Chukotka ( ; ), officially the Chukotka Autonomous Okrug, is the easternmost federal subjects of Russia, federal subject of Russia. It is an Autonomous okrugs of Russia, autonomous okrug situated in the Russian Far East, and shares a border wi ...
and several other locations, including
Sakhalin Sakhalin ( rus, Сахали́н, p=səxɐˈlʲin) is an island in Northeast Asia. Its north coast lies off the southeastern coast of Khabarovsk Krai in Russia, while its southern tip lies north of the Japanese island of Hokkaido. An islan ...
and Urup Island. In the Caucasus region, American minks were released into
North Ossetia North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is ...
. In Central Asia they were released in the
Tien Shan The Tian Shan, also known as the Tengri Tagh or Tengir-Too, meaning the "Mountains of God/Heaven", is a large system of mountain ranges in Central Asia. The highest peak is Jengish Chokusu at high and located in Kyrgyzstan. Its lowest point is ...
region. Originally, captive-bred minks were used, but wild specimens were later released to facilitate the species' acclimatisation within Soviet territories. Several years after the first release, introductions into the ranges already held by native European minks were discontinued, with most releases from then on taking place in Siberia and the Far East. Although considerable areas were occupied by the American mink by the early 1960s, the species' Soviet range was never continuous, as most released populations were isolated from one another.


Iceland

The species has been present in
Iceland Iceland is a Nordic countries, Nordic island country between the Atlantic Ocean, North Atlantic and Arctic Oceans, on the Mid-Atlantic Ridge between North America and Europe. It is culturally and politically linked with Europe and is the regi ...
since the 1930s, and has become well established, despite it being heavily hunted since 1939. However, its population underwent a 42% decline during the years 2002–2006, which coincided with a decline in
sand eel Sand eel or sandeel is the common name used for a considerable number of species of fish. While they are not true eels, they are eel-like in their appearance and can grow up to in length. Many species are found off the western coasts of Europe ...
populations resulting in a drop in the seabird populations on which the minks feed.


Asia

American mink is considered as one of the most widespread invasive species in
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
, especially in Northeastern area. Minks are introduced in some prefectures
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
as well, especially being problematic in
Hokkaido is the list of islands of Japan by area, second-largest island of Japan and comprises the largest and northernmost prefectures of Japan, prefecture, making up its own list of regions of Japan, region. The Tsugaru Strait separates Hokkaidō fr ...
, and regulated by law.


Diseases and parasites

The American mink often carries light
tick Ticks are parasitic arachnids of the order Ixodida. They are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, and species, but can become larger when engorged. Ticks a ...
and
flea Flea, the common name for the order (biology), order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by hematophagy, ingesting the blood of their hosts. Adult f ...
infestations. Tick species known to infest minks include '' Ixodes hexagonus'', '' Ixodes canisuga'', ''
Ixodes ricinus ''Ixodes ricinus'', the castor bean tick, is a chiefly European species of hard-bodied tick. It may reach a length of when engorged with a blood meal, and can transmit both bacterial and viral pathogens such as the causative agents of Lyme disea ...
'', and '' Ixodes acuminatus''. Flea species known to infest minks include '' Palaeopsylla minor'', '' Malaraeus penicilliger'', '' Ctenopthalmus noblis'', '' Megabothris walkeri'', '' Typhloceras poppei'', and '' Nosopsyllus fasciatus''.
Endoparasite Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The en ...
s include '' Skrjabingylus nasicola'' and '' Troglotrema acutum''. Trematode ''
Metorchis conjunctus ''Metorchis conjunctus'', common name Canadian liver fluke, is a species of trematode parasite in the family Opisthorchiidae. It can infect mammals that eat raw fish in North America. The first intermediate host is a freshwater snail and the seco ...
'' can also infect American minks. Transmissible mink encephalopathy (TME) is a
prion A prion () is a Proteinopathy, misfolded protein that induces misfolding in normal variants of the same protein, leading to cellular death. Prions are responsible for prion diseases, known as transmissible spongiform encephalopathy (TSEs), w ...
disease of mink, similar to BSE in cattle and
scrapie Scrapie () is a fatal, degenerative disease affecting the nervous systems of sheep and goats. It is one of several transmissible spongiform encephalopathies (TSEs), and as such it is thought to be caused by a prion. Scrapie has been known sin ...
in sheep. A 1985 outbreak of TME in Stetsonville, Wisconsin resulted in a 60% mortality rate for the minks. Further testing revealed this agent is transmissible between mink, cattle, and sheep. The Stetsonville outbreak may have been due to the mink being fed carcasses or otherwise consuming other infected animals. ''
Toxoplasma gondii ''Toxoplasma gondii'' () is a species of parasitic alveolate that causes toxoplasmosis. Found worldwide, ''T. gondii'' is capable of infecting virtually all warm-blooded animals, but members of the cat family (felidae) are the only known d ...
'' has been recorded in American minks in southern Chile, with 59%
seroprevalence Seroprevalence is the number of persons in a population who test positive for a specific disease based on serology (blood serum) specimens, often presented as a percent of the total specimens tested or as a proportion per 100,000 persons tested. As ...
in the 73 mink analyzed in one study. Southern river otters of the area were also found to have high ''T. gondii'' seroprevalence in this study, showing a high exposure of
semiaquatic In biology, being semi-aquatic refers to various macroorganisms that live regularly in both aquatic and terrestrial environments. When referring to animals, the term describes those that actively spend part of their daily time in water (in ...
mustelids to the parasite in this part of Chile.


Decline of wild mink

Because of numerous incidents of domestic mink escaping from fur farms and establishing themselves in the wild, concern has arisen among conservationists of the possible repercussions such escapes may have on natural wild mink populations. Domestic mink are larger than wild mink, which may cause problems with the ecosystem when they escape. Minks are solitary, territorial animals and are intolerant of other minks. In times of overpopulation, they control their own numbers by either killing each other through direct conflict or by causing weaker minks to be driven from territory until
starvation Starvation is a severe deficiency in caloric energy intake, below the level needed to maintain an organism's life. It is the most extreme form of malnutrition. In humans, prolonged starvation can cause permanent organ damage and eventually, de ...
sets in. When hundreds or thousands of released domestic minks flood an ecosystem, it causes a great disturbance for the wild minks, resulting in the deaths of the majority of the released mink and many of the wild ones from starvation or injuries incurred while fighting over
territory A territory is an area of land, sea, or space, belonging or connected to a particular country, person, or animal. In international politics, a territory is usually a geographic area which has not been granted the powers of self-government, ...
. When a domestic mink survives long enough to reproduce, it may cause problems for the wild mink populations. The adding of weaker domestic mink genes into wild mink populations is believed by some to have contributed to the decline of mink populations in Canada. A 2006 study in
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
concluded, due to frequent escapes from existing mink farms, "Closing mink farms may result in a crash of the free-ranging population, or alternatively it may result in the establishment of a better-adapted, truly feral population that may ultimately outnumber the population that was present before farm closures." The study reported more information would be necessary to determine the outcome. Another Danish study reported a significant majority of the "wild" mink were mink which had escaped from fur farms. About 47% had escaped within two months, 31% had escaped prior to two months, and 21% "may or may not have been born in nature." The survival rate for recently released minks is reportedly lower than for wild minks, but if feral minks survive at least two months, their survival rate is the same as for wild minks. The authors suggest this is due to the rapid behavioural adaptation of the animals.


Relationships with humans


Disease

The American mink and
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialize ...
have both been found to transmit
SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is a strain of coronavirus that causes COVID-19, the respiratory illness responsible for the COVID-19 pandemic. The virus previously had the Novel coronavirus, provisional nam ...
, the virus that causes
COVID-19 Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑19 can vary but often include fever ...
. Since the 1980s, Rocky Mountain Laboratories has used American mink for disease models. Mink are not found in China but are a
SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is a strain of coronavirus that causes COVID-19, the respiratory illness responsible for the COVID-19 pandemic. The virus previously had the Novel coronavirus, provisional nam ...
transmission model.


Fur use

American minks are primarily used in manufacturing
fur coat Fur clothing is clothing made from the preserved skins of mammals. Fur is one of the oldest forms of clothing and is thought to have been widely used by people for at least 120,000 years. The term 'fur' is often used to refer to a specific item ...
s, jackets, and
cape A cape is a clothing accessory or a sleeveless outer garment of any length that hangs loosely and connects either at the neck or shoulders. They usually cover the back, shoulders, and arms. They come in a variety of styles and have been used th ...
s. Pelts that are not able to be converted into these items are made into trimming for cloth and fur coats. Mink
scarves A scarf (: scarves or scarfs) is a long piece of fabric that is worn on or around the neck, shoulders, or head. A scarf is used for warmth, sun protection, cleanliness, fashion, religious reasons, or to show support for a sports club or team. ...
and stoles are also manufactured. Jackets and capes are mostly made from small to medium-sized specimens, usually females and young males, while trimming, scarves and stoles are made from adult males. The most valuable peltries come from eastern Canada which, although the smallest, are the silkiest and darkest.


Trapping

Although difficult to catch, the American mink, prior to being commercially farmed, was among the most frequently trapped furbearers as, unlike other furbearing mammals, it did not
hibernate Hibernation is a state of minimal activity and metabolic reduction entered by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It is most ...
in winter, and could thus be caught on a nightly basis even in the far north. Minks were legally trapped from early November to early April, when their pelts were prime. Minks caught in traps cling to life with great tenacity, having been known to break their teeth in trying to extricate themselves from steel traps.
Elliott Coues Elliott Ladd Coues (; September 9, 1842 – December 25, 1899) was an American army surgeon, historian, ornithologist, and author. He led surveys of the Arizona Territory, and later as secretary of the United States Geological and Geographi ...
described a trapped mink thusly: One Native American method involved using a bait (usually a slit open chicken carcass filled with fish oil and oysters) tied to a rope and dragged around an area laden with traps. A mink would thus follow the trail into one of the traps. Another indigenous method involved placing traps scented with muskrat and female mink musk on top of disused muskrat dens by water bodies. Attracted by the scent of food and a female, the mink would get caught in the trap and drown. On the American prairies, only the steel trap was used, due to the lack of timber.


Farming

Breeding American minks for their fur began in the late 19th century, as increasing enthusiasm for mink pelts made the harvesting of wild minks insufficient to meet the new demands. American minks are easily kept in captivity, and breed readily. In 2005, the US ranked fourth in production behind
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
, China and the
Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
. Minks typically breed in March, and give birth to their litters in May. Farmers
vaccinate A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. The safety and effectiveness of vaccines has been widely studied and verified. A vaccine typically contains an age ...
the young kits for
botulism Botulism is a rare and potentially fatal illness caused by botulinum toxin, which is produced by the bacterium ''Clostridium botulinum''. The disease begins with weakness, blurred vision, Fatigue (medical), feeling tired, and trouble speaking. ...
, distemper,
enteritis Enteritis is inflammation of the small intestine. It is most commonly caused by food or drink contaminated with pathogenic microbes,Dugdale, David C., IIII, and George F Longretc"Enteritis" MedlinePlus Medical Encyclopedia, 18 October 2008. Acces ...
, and, if needed,
pneumonia Pneumonia is an Inflammation, inflammatory condition of the lung primarily affecting the small air sacs known as Pulmonary alveolus, alveoli. Symptoms typically include some combination of Cough#Classification, productive or dry cough, ches ...
. They are harvested in late November and December. Methods for killing animals on fur farms, as on all farms, are detailed in the
American Veterinary Medical Association The American Veterinary Medical Association (AVMA) is an American not-for-profit association founded in 1863 that represents more than 105,000 veterinarians. The AVMA provides information resources, continuing education opportunities, publicat ...
's Report on
Euthanasia Euthanasia (from : + ) is the practice of intentionally ending life to eliminate pain and suffering. Different countries have different Legality of euthanasia, euthanasia laws. The British House of Lords Select committee (United Kingdom), se ...
which is used as a voluntary guideline for state departments of agriculture which have jurisdiction over all farms raising domesticated livestock, including minks. In the past, some mink farms successfully provided pools of water for the mink to swim; however, this practice is unheard-of in modern mink production. Minks are motivated to access swimming water, and the absence of water is a source of frustration on modern farms. The ideal diet for farm-bred minks consists of four to five ounces of
horse meat Horse meat forms a significant part of the culinary traditions of many countries, particularly in Europe and Asia. The eight countries that consume the most horse meat consume about 4.3million horses a year. For the majority of humanity's early ...
and a quarter-pint of milk once daily.


Colour mutations

Selective breeding Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant m ...
has produced a number of different colour shades in mink peltries, ranging from pure white, through beiges, browns, and greys, to a brown that is almost black. The two standard strains are brown and "black cross" which, when paired, produce numerous colour variations. When an
albino Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and reddish pink or blue eyes. Individuals with the condition are referred to as albinos. Varied use and interpretation of ...
mink is born, it is standard procedure in fur farms to breed it to other colour mutations to produce grey and light-brown pastel shades. The following graph is a simplification of the main colour strains:


As pets

Wild mink can be tamed if caught young, but can be difficult to handle and are usually not handled bare-handed. In the late 19th century, tame American minks were often reared for ratting, much as
ferret The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), as evidenced by the ferret's ability to inter ...
s were used in Europe. Some modern ratters have revived this practice using farm-raised mink, sometimes alongside ratting dogs. They are sometimes more effective ratters than
terrier Terrier () is a Dog type, type of dog originally bred to hunt vermin. A terrier is a dog of any one of many Dog breed, breeds or landraces of the terrier Dog type, type, which are typically small, wiry, Gameness, game, and fearless. There are fi ...
s, as they can enter rat holes and drive rats from their hiding places. When mink of wild stock are confined with tame ones, the wild invariably dominate the tamed mink. They have also been known to dominate cats in confrontations. Although intelligent, minks are not quick to learn tricks taught to them by their owners. Because of their fondness for bathing, captive American minks may enter
kettle A kettle, sometimes called a tea kettle or teakettle, is a device specialized for boiling water, commonly with a ''lid'', ''spout'', and ''handle''. There are two main types: the ''stovetop kettle'', which uses heat from a cooktop, hob, and the ...
s or other open water-containing vessels. Although domestic minks have been bred in captivity for almost a century, they have not been bred to be tame. Domestic minks have been bred for size, fur quality, and color. However, the U.S. Fur Commission claims "mink are truly domesticated animals", based on the number of years they have been kept on fur farms.


Literature

As an
invasive species An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native spec ...
in the United Kingdom, minks have been the subject of at least two novels. Ewan Clarkson's 1968 ''Break for Freedom'' (published as ''Syla, the Mink'' in the US) tells the story of a female mink escaped from a fur farm in a realistic style. On the other hand, A.R. Lloyd's 1982 ''Kine'' is a
heroic fantasy Sword and sorcery (S&S), or heroic fantasy, is a subgenre of fantasy characterized by sword-wielding heroes engaged in exciting and violent adventures. Elements of romance, magic, and the supernatural are also often present. Unlike works of ...
with the minks as villains and the
weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets, and European mink. Members of this genus are small, active predators, with long and slend ...
s and other indigenous animals as heroes.


Indigenous names

*
Abenaki language Abenaki (Eastern: ', Western: ), also known as Wôbanakiak, is an endangered Eastern Algonquian language of Quebec and the northern states of New England. The language has Eastern and Western forms which differ in vocabulary and phonology an ...
** **
Penobscot The Penobscot (Abenaki: ''Pαnawάhpskewi'') are an Indigenous people in North America from the Northeastern Woodlands region. They are organized as a federally recognized tribe in Maine and as a First Nations band government in the Atlantic p ...
: * * * * * * or * * * * ** ** ** ** ** ** James Bay Cree: * *
Dakelh The Dakelh (pronounced ) or Carrier are a First Nations in Canada, First Nations Indigenous peoples of the Americas, Indigenous people living a large portion of the British Columbia Interior, Central Interior of British Columbia, Canada. The Dakel ...
** Nadleh Whut'en: ** Nak'azdli: * * Dënesųłinë́: * *
Halkomelem Halkomelem (; in the Upriver dialect, in the Island dialect, and in the Downriver dialect) is a language of various First Nations peoples of the British Columbia Coast. It is spoken in what is now British Columbia, ranging from southeastern ...
** Hul'q'umi'num: ** Halqeméylem: * ** Haíɫzaqv: * * * * * * Kwak̓wala: * *
Lenape The Lenape (, , ; ), also called the Lenni Lenape and Delaware people, are an Indigenous peoples of the Northeastern Woodlands, Indigenous people of the Northeastern Woodlands, who live in the United States and Canada. The Lenape's historica ...
** ** * *
Lushootseed Lushootseed ( ), historically known as Puget Salish, Puget Sound Salish, or Skagit-Nisqually, is a Central Coast Salish language of the Salishan language family. Lushootseed is the general name for the dialect continuum composed of two main di ...
** Northern Lushootseed: ** Southern Lushootseed: * * * * * Nishnaabemwin: * Nlaka'pamuctsin: * *
Nuu-chah-nulth The Nuu-chah-nulth ( ; ), also formerly referred to as the Nootka, Nutka, Aht, Nuuchahnulth or Tahkaht, are one of the Indigenous peoples of the Pacific Northwest Coast in Canada. The term Nuu-chah-nulth is used to describe fifteen related tri ...
** Ehattesaht: ** Tseshaht: * * * * * *
Salish Salish () may refer to: * Salish peoples, a group of First Nations/Native Americans ** Coast Salish peoples, several First Nations/Native American groups in the coastal regions of the Pacific Northwest ** Interior Salish peoples, several First Na ...
: * Senćoŧen: * Shashishalhem: * Secwepemc: * Sm'álgyax: * * Tse'khene: * * Witsuwitʼen: * Wolastoqey-Passamaquoddy:


See also

*
Aleutian disease Aleutian disease, also known as mink plasmacytosis, is a disease which causes spontaneous abortion and death in minks and ferrets. It is caused by Aleutian mink disease virus (also known as Aleutian disease virus, ADV), a highly contagious parvo ...
*
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialize ...
* Sea mink *
Fur farming Fur farming is the practice of breeding or raising certain types of animals for their fur. Most of the world's farmed fur was produced by European farmers. In 2018, there were 5,000 fur farms in the EU, located across 22 countries; these area ...


References


Sources

* * * * * * * * * * * *


External links

* * * * {{Authority control Mink, American Mammals described in 1777 Mink, American Taxa named by Johann Christian Daniel von Schreber Semiaquatic mammals Taxobox binomials not recognized by IUCN