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Tyron's rat chart. Prior to Robert Tryon’s study of selective rat breeding, concluded in 1942, many psychologists believed that environmental, rather than genetic, differences produced individual behavioral variations. Tryon sought to demonstrate that genetic traits often did, in fact, contribute to behavior.
Genetic mutations have also created different fur types, such as rex and hairless. Congenital malformation in selective breeding have created the dumbo rat, a popular pet choice due to their low, saucer-shaped ears. [22] A breeding standard exists for rat fanciers wishing to breed and show their rat at a rat show. [23]
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 ...
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 bush rat begins breeding around November and has litter sizes ranging usually between 4–5. The majority of individuals do not live to a second breeding cycle due to their short life span. The gestation period of the bush rat varies between 22 and 24 days. The "nursery" of the bush rat is its burrow.
Naked mole-rats feed primarily on very large tubers (weighing as much as a thousand times the body weight of a typical mole-rat) that they find deep underground through their mining operations. A single tuber can provide a colony with a long-term source of food—lasting for months, or even years, [ 57 ] as they eat the inside but leave the ...
Efforts have been made to develop rat farming among the dalit in the Indian state of Bihar; one obstacle to this is that the animal vehicle of the god Ganesh is a rat. [7] In Cameroon, cane rats is encouraged in economic development efforts. [2] [8] In Australia, a rat farm that provides food for zoos and pet stores was the subject of a 2018 ...
The Chinese bamboo rat is solitary, except during the breeding season. It breeds all year round, with a spring peak; litters of two to four young (eight maximum) are born naked, and are weaned at three months. Territory is marked by four to seven soil mounds marking plugged entrances (20 to 40 cm high and 50 to 80 cm across).