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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.
Rats are opportunistic eaters; in the wild, rats are herbivores, as they will scavenge for seeds, plants and fruits. Due to a lack of easily accessible produce in the city, city rats will eat nearly anything, including trash and meat. Domestic rats live slightly longer than wild rats, with life spans of around two years. [16]
This is a list of maximum recorded animal lifespans in captivity.Only animals from the classes of the Chordata phylum are included. [1] On average, captive animals (especially mammals) live longer than wild animals.
Rats become sexually mature at age 6 weeks, but reach social maturity at about 5 to 6 months of age. The average lifespan of rats varies by species, but many only live about a year due to predation. [11] The black and brown rats diverged from other Old World rats in the forests of Asia during the beginning of the Pleistocene. [12]
This plug stays in place for some 24 hours. The gestation period is about 19–21 days, and they give birth to a litter of 3–14 young (average six to eight). One female can have 5 to 10 litters per year, so the mouse population can increase very quickly. Breeding occurs throughout the year.
The average litter size of the Sprague Dawley rat is 11.0. [29] These rats typically have a longer tail in proportion to their body length than Wistars. They were used in the Séralini affair, where the herbicide RoundUp was claimed to increase the occurrence of tumor in these rats. However, since these rats are known to grow tumors at a high ...
Rebecca MacMillan weighs in, "The average lifespan of bearded dragons is eight to 12 years, though some may live less than this and others may live a bit longer!"
A female has between 8 and 10 litters during her life. The young (8–14 rat pups per litter) are born blind and naked. Young reach sexual maturity around 50 to 60 days after birth. The lifespan of adults is around a year.