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Naked Mole-Rats

Naked Mole-Rats   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
2,057 words
Illustration(s):
1

...Mole-Rats Mole-rat is the vernacular name for thirty-seven species of fossorial rodents in ten genera that inhabit subterranean burrows like moles but whose cylindrical body shape, slender tail, and large incisors resemble those of rats. This entry focuses on Heterocephalus glaber (literally ‘otherheaded smooth’), the most unusual-looking and social of the African mole-rats (family Bathyergidae). Figure 1. A naked mole-rat cannot be mistaken for any other mammal.Photo courtesy of Paul W. Sherman. Naked mole-rats resemble overcooked sausages with buck...

Eusociality

Eusociality   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
6,065 words
Illustration(s):
1

...twenty adults, except for colonies of certain African mole rats, especially the naked mole-rat, whose colonies contain up to 300 individuals. [ See Naked Mole-Rats .] The young stay at home when ecological conditions make dispersal especially difficult or group-living particularly beneficial. As a result, colonies typically are composed of two or more generations of reproductively mature, closely related individuals. However, the length of time offspring remain at home varies. In black-tailed prairie dogs, African lions, and golden jackals, some offspring...

Mammals

Mammals   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
5,871 words
Illustration(s):
1

...the flying squirrels and the scaly-tailed flying squirrels of Africa. Separate stocks adapted for underground life (tuco tucos, pocket gophers, mole rats) ( Nevo , 1999 ); bipedal desert-adapted rodents evolved several times (jerboas, kangaroo rats, jumping mice) ( Prakash and Ghosh , 1975 ); semiaquatic adaptations are exemplified by the Australian water rats, muskrats, beaver, and water voles. Arboreal adaptations include the squirrels and numerous other groups such as dormice and climbing rats. Convergence in form and function have led to numerous studies...

Alloparental Care

Alloparental Care   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005

...established as breeders (parental facilitation). Such tolerance has been reported to facilitate survival of the offspring in jays and may be associated with territorial bequeathal in squirrels. See also Eusociality , article on Eusociality in Mammals ; Group Living ; Naked Mole-Rats ; Parental Care ; Reciprocal Altruism . Brown, J. L. Helping and Communal Breeding in Birds: Ecology and Evolution . Princeton, 1987. Choe, J. C. , and E. J. Crespi eds. The Evolution of Social Behaviour in Insects and Arachnids . Cambridge, 1997. Dugatkin, L. A. ...

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