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Wildcat
The wildcat is a species complex comprising two small wild cat species: the European wildcat (''Felis silvestris'') and the African wildcat (''F. lybica''). The European wildcat inhabits forests in Europe, Anatolia and the Caucasus, while the African wildcat inhabits semi- arid landscapes and steppes in Africa, the Arabian Peninsula, Central Asia, into western India and western China. The wildcat species differ in fur pattern, tail, and size: the European wildcat has long fur and a bushy tail with a rounded tip; the smaller African wildcat is more faintly striped, has short sandy-gray fur and a tapering tail; the Asiatic wildcat (''F. lybica ornata'') is spotted. The wildcat and the other members of the cat family had a common ancestor about 10–15 million years ago. The European wildcat evolved during the Cromerian Stage about 866,000 to 478,000 years ago; its direct ancestor was '' Felis lunensis''. The ''silvestris'' and ''lybica'' lineages probably diverged about 173 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Wildcat
The European wildcat (''Felis silvestris'') is a small wildcat species native to continental Europe, Great Britain, Turkey and the Caucasus. Its fur is brownish to grey with stripes on the forehead and on the sides and has a bushy tail with a black tip. It reaches a head-to-body length of up to with a long tail, and weighs up to . In France and Italy, the European wildcat is predominantly nocturnal, but also active in the daytime when undisturbed by human activities. It preys foremost on small mammals such as lagomorphs and rodents, but also on ground-dwelling birds. Taxonomy ''Felis (catus) silvestris'' was the scientific name proposed in 1778 by Johann von Schreber when he described a wild cat based on texts from the early 18th century and before. In the 19th and 20th centuries, several wildcat type specimens were described and proposed as subspecies, including: * ''Felis silvestris caucasica'' proposed by Konstantin Satunin in 1905 was a skin of a female cat collected ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asiatic Wildcat
The Asiatic wildcat (''Felis lybica ornata''), also known as the Indian desert cat, is an African wildcat subspecies that occurs from the eastern Caspian Sea north to Kazakhstan, into western India, western China and southern Mongolia. There is no information on current status or population numbers across the Asiatic wildcat's range as a whole, but populations are thought to be declining. Taxonomy ''Felis ornata'' was the scientific name used by John Edward Gray in the early 1830s as a caption to an illustration of an Indian wildcat from Thomas Hardwicke's collection. In subsequent years, several naturalists described spotted wildcat zoological specimens from Asian range countries and proposed names, including the following: *''Chaus caudatus'' by Gray in 1874 was a skin and skull from the Bukhara Region in Uzbekistan. *''Felis shawiana'' by William Thomas Blanford in 1876 was a pale wildcat skin from Yarkand in Xinjiang, western China. *''Felis (Felis) kozlovi'' by Konstan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Wildcat
The African wildcat (''Felis lybica'') is a small wildcat species with sandy grey fur, pale vertical stripes on the sides and around the face. It is native to Africa, West and Central Asia, and is distributed to Rajasthan in India and Xinjiang in China. It inhabits a broad variety of landscapes ranging from deserts to savannas, shrublands and grasslands. The African wildcat is the ancestor of the domestic cat (''F. catus''). Some African wildcats were domesticated about 10,000 years ago in the Near East. Interspecific hybrids between both species are common where their ranges overlap. Taxonomy ''Felis lybica'' was the scientific name proposed in 1780 by Georg Forster who based his description on a specimen from Gafsa on the Barbary Coast that had the size of a domestic cat, but a reddish fur, short black tufts on the ears, and a ringed tail. Between the late 18th and 20th centuries, several naturalists and curators of natural history museums described and proposed new nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 species are rodents. They are native to all major land masses except for Antarctica, and several oceanic islands, though they have subsequently been introduced to most of these land masses by human activity. Rodents are extremely diverse in their ecology and lifestyles and can be found in almost every terrestrial habitat, including human-made environments. Species can be arboreal, fossorial (burrowing), saltatorial/ricochetal (leaping on their hind legs), or semiaquatic. However, all rodents share several morphological features, including having only a single upper and lower pair of ever-growing incisors. Well-known rodents include Mouse, mice, rats, squirrels, prairie dogs, porcupines, beavers, Cavia, guinea pigs, and hamsters. Once included wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic Revolution
The Neolithic Revolution, also known as the First Agricultural Revolution, was the wide-scale transition of many human cultures during the Neolithic period in Afro-Eurasia from a lifestyle of hunter-gatherer, hunting and gathering to one of agriculture and sedentism, settlement, making an increasingly large population possible. These settled communities permitted humans to observe and experiment with plants, learning how they grew and developed. This new knowledge led to the domestication of plants into crops. Archaeological data indicate that the domestication of various types of plants and animals happened in separate locations worldwide, starting in the Geologic time scale, geological epoch of the Holocene 11,700 years ago, after the end of the last Ice Age. It was humankind's first historically verifiable transition to agriculture. The Neolithic Revolution greatly narrowed the diversity of foods available, resulting in a decrease in the quality of human nutrition compared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybridisation (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different variety (botany), varieties, subspecies, species or genus, genera through sexual reproduction. Generally, it means that each cell has genetic material from two different organisms, whereas an individual where some cells are derived from a different organism is called a chimera (genetics), chimera. Hybrids are not always intermediates between their parents such as in blending inheritance (a now discredited theory in modern genetics by particulate inheritance), but can show Heterosis, hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductive isolation, reproductively isola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introgression
Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression is a long-term process, even when artificial; it may take many hybrid generations before significant backcrossing occurs. This process is distinct from most forms of gene flow in that it occurs between two populations of different species, rather than two populations of the same species. Introgression also differs from simple Hybridization (biology), hybridization. Simple hybridization results in a relatively even mixture; gene and allele frequencies in the first generation will be a uniform mix of two parental species, such as that observed in mules. Introgression, on the other hand, results in a complex, highly variable mixture of genes, and may only involve a minimal percentage of the donor genome. Definition Introgression or i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN Red List
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological species. A series of Regional Red Lists, which assess the risk of extinction to species within a political management unit, are also produced by countries and organizations. The goals of the Red List are to provide scientifically based information on the status of species and subspecies at a global level, to draw attention to the magnitude and importance of threatened biodiversity, to influence national and international policy and decision-making, and to provide information to guide actions to conserve biological diversity. Major species assessors include BirdLife International, the Institute of Zoology (the research division of the Zoological Society of London), the World Conservation Monitoring Centre, and many Specialist Groups w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least Concern
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 wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the " Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15,636) in the IUCN database still use the code "LR/lc", which indicates they have not been re- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science (journal)
''Science'' is the peer review, peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals. It was first published in 1880, is currently circulated weekly and has a subscriber base of around 130,000. Because institutional subscriptions and online access serve a larger audience, its estimated readership is over 400,000 people. ''Science'' is based in Washington, D.C., United States, with a second office in Cambridge, UK. Contents The major focus of the journal is publishing important original scientific research and research reviews, but ''Science'' also publishes science-related news, opinions on science policy and other matters of interest to scientists and others who are concerned with the wide implications of science and technology. Unlike most scientific journals, which focus on a specific field, ''Science'' and its rival ''Nature (journal), Nature'' cover the full range of List of academ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Felis Lunensis
''Felis lunensis,'' or the Martelli's cat is an extinct felid of the subfamily Felinae. Evolution and taxonomy Around 12 million years ago, the genus ''Felis'' appeared and eventually gave rise to many of the modern small cats. ''Felis lunensis'' was one of the first modern ''Felis'' species, appearing around 2.5 million years ago in the Pliocene. Fossil specimens of ''F. lunensis'' have been recovered in Italy and Hungary. Fossil evidence suggests the modern European wildcat ''Felis silvestris'' may have evolved from ''F. lunensis'' during the Middle Pleistocene. This has resulted in ''F. lunensis'' occasionally being considered a subspecies of ''Felis silvestris''. ''Felis lunensis'' first described by Alessandro Martelli in 1906 was a mandible excavated in Pliocene deposits near Olivola in Tuscany. The holotype specimen is now preserved in the collection of the University of Florence The University of Florence ( Italian: ''Università degli Studi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cromerian Stage
The Cromerian Stage or Cromerian Complex, also called the Cromerian (), is a stage in the Pleistocene glacial history of north-western Europe, mostly occurring more than half a million years ago. It is named after the East Anglian town of Cromer in Great Britain where interglacial deposits that accumulated during part of this stage were first discovered. The stratotype for this interglacial is the Cromer Forest Bed situated at the bottom of the coastal cliff near West Runton. The Cromerian stage preceded the Anglian and Elsterian glacials and show an absence of glacial deposits in western Europe, which led to the historical terms Cromerian interglacial and the Cromerian warm period (). It is now known that the Cromerian consisted of multiple glacial and interglacial periods. Chronology The core of the Cromerian is the first half of the Middle Pleistocene stage (Ionian) approximately 800-500 ka ago, just before the Anglian glaciation. In terms of Marine isotope stages (MIS) thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
