|
Ambystoma Tigrinum
The tiger salamander (''Ambystoma tigrinum'') is a species of mole salamander and one of the largest terrestrial salamanders in North America. Description These salamanders usually grow to a length of with a lifespan of around 12–15 years. They are characterized by having markings varying in color on the back of their head, body, and tail. The coloring of these spots range from brownish yellow to greenish yellow, while the rest of their back is black or dark brown. They are smooth bodied, with costal grooves running down their sides to aid in moisture control. They have short snouts, thick necks, strong legs, and lengthy tails. Tiger salamanders also utilize specialized foot pads for burrowing.Tiger salamanders are a sexually dimorphic species, as the males are larger in body size, as well as have longer and higher tails than females. Some individuals, typically when their aquatic environment is well suited, will retain their larval characteristics and forego metamorphosis. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NatureServe
NatureServe, Inc. is a non-profit organization based in Arlington County, Virginia, United States, US, that provides proprietary wildlife conservation-related data, tools, and services to private and government clients, partner organizations, and the public. NatureServe reports being "headquartered in Arlington, Virginia, with regional offices in four U.S. locations and in Canada." In calendar year 2011 they reported having 86 employees, 6 volunteers, and 15 independent officers. History The Nature Conservancy reports that in 2000 it spun off its 85-center Natural Heritage Network "into a new independent organization, the Association for Biodiversity Information (later renamed NatureServe)." NatureServe reports that it was established in 1994 as the Association for Biodiversity Information. In 2001 the IRS approved a name change to NatureServe that was requested in 1999, while maintaining the organization's 501(c)(3) tax-exempt status granted in July 1995. NatureServe's website dec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambystomatidae
Ambystomatidae is a family of salamanders belonging to the Suborder Salamandroidea in the class Amphibia. It contains two genera, ''Ambystoma'' (the mole salamanders) and ''Dicamptodon'' (the Pacific giant salamanders). ''Ambystoma'' contains 32 species and are distributed widely across North America, while ''Dicamptodon'' contains four species restricted to the Pacific Northwest. These salamanders are mostly terrestrial and eat invertebrates, although some species are known to eat smaller salamanders. They can be found throughout the US and some areas of Canada in damp forests or plains. This family contains some of the largest terrestrial salamanders in the world, the tiger salamander and the coastal giant salamander. Some species are toxic and can secrete poison from their bodies as protection against predators or infraspecific competition. Neoteny has been observed in several species in Ambystomatidae, and some of them like the axolotl live all of their lives under water i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated as subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific name, infraspecific ranks, such as variety (botany), variety, may be named. In bacteriology and virology, under standard International Code of Nomenclature of Prokaryotes, bacterial nomenclature and virus clas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plateau Tiger Salamander
The plateau tiger salamander or Mexican tiger salamander (''Ambystoma velasci'') is a species of mole salamander in the family Ambystomatidae. Description The plateau tiger salamander exhibits facultative paedomorphosis. The adult coloration is olive green across the backs with dark spots, and white or cream across the underside of the abdomen. This species has external gills similar to those on other aquatic salamander species. However, this salamander can undergo metamorphosis again in adulthood, via a complex genetic mechanism in response to its environment. During this change, the salamander shrinks, loses its external gills and the legs elongate. Habitat and distribution The plateau tiger salamander is typically considered endemic to Mexico, although its range might extend to the United States. They have a wide geographic distribution, ranging from Chihuahua in the north, to Durango in the south, and to Jalisco in the west. Its natural habitat is grassland, including s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barred Tiger Salamander
The barred tiger salamander or western tiger salamander (''Ambystoma mavortium'') is a species of mole salamander that lives in lower western Canada, the western United States and northern Mexico. Description The barred tiger salamander typically grows from , but Neoteny, neotenic forms can grow to lengths of , and is one of the largest species of salamander in North America. It has a broad head and a sturdy body. The color is variable across its range. The dorsal surface is grey, dark brown or black with bars and spots of muddy yellow giving it a tiger-like coloring. The ventral surface varies from light to dark. Larvae have alternating dark and light blotches on the centre of the dorsal surface and pale stripes running along the sides. Kansaspedia states that the tiger salamander has been known to live in captivity for more than 20 years. Behavior Primarily nocturnal animal, nocturnal, barred tiger salamanders are opportunistic feeders, and will often eat anything they can cat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Tiger Salamander
The California tiger salamander (''Ambystoma californiense'') is a vulnerable amphibian native to California. It is a mole salamander. Previously considered to be a subspecies of the tiger salamander (''A. tigrinum)'', the California tiger salamander was recently designated a separate species again. Historically, they were endemic to the San Joaquin-Sacramento river valleys, although their range has now contracted into three distinct population segments that are geographically isolated and genetically distinct from one another. The California tiger salamander distinct population segment (DPS) in Sonoma County and the Santa Barbara County DPS are listed as federally endangered, while the Central California DPS is listed as federally threatened. The Sonoma County, south San Joaquin, and the Santa Barbara County DPS have diverged from the rest of the California tiger salamander populations for over one million years, since the Pleistocene and they may warrant status as separate s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ranavirus
''Ranavirus'' is a genus of viruses in the family ''Iridoviridae''. There are six other genus, genera of viruses within the family ''Iridoviridae'', but ''Ranavirus'' is the only one that includes viruses that are infectious to amphibians and reptiles. Additionally, it is one of the three genera within this family which infect teleostei, teleost fishes, along with ''Lymphocystivirus'' and ''Megalocytivirus''. Ecological impact The Ranaviruses, like the Megalocytiviruses, are an emerging infectious disease, emerging group of closely related DNA, dsDNA viruses which cause systemic disease, systemic infections in a wide variety of wild and cultured fresh and saltwater fishes. As with Megalocytiviruses, ''Ranavirus'' outbreaks are therefore of considerable economic importance in aquaculture, as epizootics can result in moderate fish loss or mass mortality events of cultured fishes. Unlike Megalocytiviruses, however, ''Ranavirus'' infections in amphibians have been implicated as a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chytridiomycosis
Chytridiomycosis ( ) is an infectious disease in amphibians, caused by the chytrid fungi '' Batrachochytrium dendrobatidis'' and '' Batrachochytrium salamandrivorans''. Chytridiomycosis has been linked to dramatic population declines or extinctions of amphibian species in western North America, Central America, South America, eastern Australia, east Africa (Tanzania), and Dominica and Montserrat in the Caribbean. Much of the New World is also at risk of the disease arriving within the coming years. The fungus is capable of causing sporadic deaths in some amphibian populations and 100% mortality in others. No effective measure is known for control of the disease in wild populations. Various clinical signs are seen by individuals affected by the disease. A number of options are possible for controlling this disease-causing fungus, though none has proved to be feasible on a large scale. The disease has been proposed as a contributing factor to a global decline in amphibian popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoteny
Neoteny (), also called juvenilization,Montagu, A. (1989). Growing Young. Bergin & Garvey: CT. is the delaying or slowing of the Physiology, physiological, or Somatic (biology), somatic, development of an organism, typically an animal. Neoteny in humans, Neoteny in modern humans is more significant than in other primates. In progenesis or paedogenesis, sexual development is accelerated. Both neoteny and progenesis result in paedomorphism (as having the form typical of children) or paedomorphosis (changing towards forms typical of children), a type of heterochrony. It is the retention in adults of traits previously seen only in the young. Such retention is important in evolutionary biology, domestication, and evolutionary developmental biology. Some authors define paedomorphism as the retention of larval traits, as seen in salamanders.Schell, S. C. ''Handbook of Trematodes of North America North of Mexico'', 1985, pg. 22 History and etymology Julius Kollmann created the term ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bait (luring Substance)
Bait is any appetizing substance (e.g. food) used to attract prey when hunting or fishing, most commonly in the form of animal trapping, trapping (e.g. mousetrap and bird trap), ambushing (e.g. from a hunting blind) and angling. Baiting is a ubiquitous practice in both recreational (especially angling) and commercial fishing, but the use of live food, live bait can be deemed illegal fishing, illegal under certain fisheries law and local jurisdictions. For hunting, however, baiting can often be controversial as it violates the principles of fair chase, although it is still a commonly accepted practice in varmint hunting, culling and pest control. Uses Fishing Baiting is ubiquitously practised to catching fish. Traditionally, Lumbricus terrestris, nightcrawlers, small baitfish, insect adults and larvae have been used as standard fish hook, hookbait, and offals are commonly used as groundbait (a.k.a. chumming) in big-game fishing, blue water fishing. Modern fishermen have als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axolotl
The axolotl (; from ) (''Ambystoma mexicanum'') is a neoteny, paedomorphic salamander, one that Sexual maturity, matures without undergoing metamorphosis into the terrestrial adult form; adults remain Aquatic animal, fully aquatic with obvious external gills. This trait is somewhat unusual among amphibians, though this trait is not unique to axolotls, and this is apparent as they may be confused with the Tadpole, larval stage or Ambystoma#Species, other neotenic adult mole salamanders (''Ambystoma spp.''), such as the occasionally paedomorphic tiger salamander (''Ambystoma tigrinum, A. tigrinum'') widespread in North America; or with mudpuppies (''Necturus spp.''), which bear a superficial resemblance but are from a different Family (biology), family of salamanders. Axolotls originally inhabited a system of interconnected wetlands and lakes in the Mexican highlands; they were known to inhabit the smaller lakes of Lake Xochimilco, Xochimilco and Lake Chalco, Chalco, and are al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
