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Pictomicrograph shows the posteromedial barrel subfield in layer IV of the rat somatosensory cortex. Barrels in the PMBSF are particularly large and distinct. The tissue in the image has been stained with cytochrome oxidase and is 50μm thick. The barrel field, like many regions of cortex, is organised into a topographic map. In the case of the ...
The only rat-free continent is Antarctica, which is too cold for rat survival outdoors, and its lack of human habitation does not provide buildings to shelter them from the weather. However, rats have been introduced to many of the islands near Antarctica, and because of their destructive effect on native flora and fauna, efforts to eradicate ...
The brown rat (Rattus norvegicus), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat and Norwegian rat, is a widespread species of common rat. One of the largest muroids, it is a brown or grey rodent with a body length of up to 28 cm (11 in) long, and a tail slightly shorter than that. It weighs between 140 ...
Ornithonyssus bacoti (also known as the tropical rat mite and formerly called Liponyssus bacoti) is a hematophagous parasite. [1] It feeds on blood and serum from many hosts. [ 2 ] [ 3 ] O. bacoti can be found and cause disease on rats and wild rodents most commonly, but also small mammals and humans when other hosts are scarce.
The Polynesian rat, Pacific rat or little rat (Rattus exulans), or kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.Contrary to its vernacular name, the Polynesian rat originated in Southeast Asia, and like its relatives has become widespread, migrating to most of Polynesia, including New Zealand, Easter Island, and Hawaii.
Ptyas mucosa, commonly known as the Oriental rat snake, [2] dhaman or Indian rat snake, [4] is a common non-venomous species of colubrid snake found in parts of South and Southeast Asia. Dhamans are large snakes. Typical mature total length is around 1.5 to 1.95 m (4 ft 11 in to 6 ft 5 in) though some exceed 2 m (6 ft 7 in).
The currently accepted scientific name for the hispid cotton rat is Sigmodon hispidus.It is a member of the family Cricetidae. [5] Although 25 subspecies are accepted, including the type subspecies, [6] the most distinct genetic subdivision within S. hispidus separates the species into two genetic lineages, an eastern one and a western one, which hybridize along a contact zone.
A cotton rat is any member of the rodent genus Sigmodon. Their name derives from their damaging effects on cotton as well as other plantation crops , such as sugarcane, corn, peanut and rice. [ 2 ] [ 3 ] Cotton rats have small ears and dark coats, and are found in North and South America .