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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.
Download as PDF; Printable version; In other projects ... A breeding standard exists for rat fanciers wishing to breed and show their rat at a rat show. [23]
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).
When searching for food is dangerous or unproductive, animals often use food stores to supply all or part of their diet. This is a feasible strategy to avoid food shortage. It is the habit of collecting and storing both food and nonfood items that has earned the eastern woodrat is other common name of "pack-rat" or "trade rat". [17]
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, as they eat the inside but leave the outside ...
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 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.
In the 1940s, influenced by the studies of his former professor Edward C. Tolman, Tryon decided to test the theory that intelligence is an inherited trait. [2] To do this, he tested the ability of laboratory rats to navigate a maze: rats who took fewer wrong turns to get through the maze and reach the food at the end were termed "maze-bright", while those who took many wrong turns were termed ...