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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 ...
A closeup of a rat tail. The characteristic long tail of most rodents is a feature that has been extensively studied in various rat species models, which suggest three primary functions of this structure: thermoregulation, [13] minor proprioception, and a nocifensive-mediated degloving response. [14]
The Golan Heights blind mole-rat (Spalax golani) and the Judean Mountains blind mole-rat (Spalax judaei) are also resistant to cancer, but by a different mechanism. [ 35 ] In July 2023 a study reported the transference of the gene responsible for HMW-HA from a naked mole rat to mice leading to improved health and an approximate 4.4 percent ...
The fancy rat (Rattus norvegicus domestica) is the domesticated form of Rattus norvegicus, the brown rat, [1] and the most common species of rat kept as a pet.The name fancy rat derives from the use of the adjective fancy for a hobby, also seen in "animal fancy", a hobby involving the appreciation, promotion, or breeding of pet or domestic animals.
The naked mole-rat has a particularly long life-span for a small rodent, about 30 years, and the basis for this longevity has been investigated. [46] Naked mole-rats express DNA repair genes, including core genes in several DNA repair pathways, at a higher level than shorter-lived mice, and thus it was suggested that DNA repair acts as a ...
A comparison of the heart mitochondria in rats (7-year maximum life span) and pigeons (35-year maximum life span) showed that pigeon mitochondria leak fewer free-radicals than rat mitochondria, despite the fact that both animals have similar metabolic rate and cardiac output [69]
The African grass rat (Arvicanthis niloticus) is a species of rodent in the family Murinae. [2] Taxonomy ... Life expectancy in the wild is 2.5–3 years. Habitat
The black rat was present in prehistoric Europe and in the Levant during postglacial periods. [9] The black rat in the Mediterranean region differs genetically from its South Asian ancestor by having 38 instead of 42 chromosomes. [10] Its closest relative is the Asian house rat (R. tanezumi) from Southeast Asia. The two diverged about 120,000 ...