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Eusociality in a mammal: cooperative breeding in naked mole-rat colonies.
TLDR
Laboratory observations on a field-collected colony of 40 Heterocephalus have shown that only a single female breeds, which together with long life-spans, overlap of generations, cooperative brood care, and possible age polyethism provide parallels with the eusocial insects. Expand
Mammalian eusociality: a family affair.
TLDR
Comparative studies of two species of mole-rat are helping to clarify the ecological correlates of mammalian eusociality, and ecological factors and kin selection have apparently interacted in the evolution of eussociality in these species. Expand
The Biology of the Naked Mole-Rat
TLDR
An international group of researchers covers such topics as the evolution of eusociality, phylogeny and systematics of the rodent family Bathyergidae, population and behavioral ecology and genetics of naked mole-rats in the field, vocal and nonvocal behaviors, social organization and divisions of labor within colonies, and climatic, social, and physiological factors affecting growth, reproduction, and reproductive suppression. Expand
Ecological constraints drive social evolution in the African mole–rats
TLDR
The naked mole–rat (Heterocephalus glaber) is ancestral and divergent from the Damaraland mole– rat (Cryptomys damarensis), supporting previous findings that have suggested the multiple evolution of eusociality within the Bathyergidae. Expand
Phylogeographical patterns of genetic divergence and speciation in African mole‐rats (Family: Bathyergidae)
TLDR
This study uses an extensive molecular phylogeny and mitochondrial cytochrome b and 12s rRNA molecular clocks to examine in detail the divergence times, and patterns of speciation of the five extant genera in the context of rift valley formation in Africa. Expand
A dispersive morph in the naked mole-rat
TLDR
The discovery of a dispersal phenotype that may occasionally promote outbreeding in naked mole-rats is reported, suggesting that, although rare, a dispersive morph exists within Naked mole-rat colonies. Expand
Eusociality has evolved independently in two genera of bathyergid mole-rats — but occurs in no other subterranean mammal
TLDR
Differences in colony cohesion, ethology and the hormonal profiles of non-reproductive animals suggests that eusociality evolved along different pathways in these two phylogenetically divergent genera of the Bathyergidae. Expand
The burrow systems and burrowing dynamics of the mole‐rats Bathyergus suillus and Cryptomys hottentotus in the fynbos of the south‐western Cape, South Africa
TLDR
Bathyergus suillus appear to remain resident in an area and to have an optimum burrow length, maintained by blocking old burrows with newly-excavated soil, which may promote rapid regeneration of food plants within the home range. Expand
Social suppression of ovarian cyclicity in captive and wild colonies of naked mole-rats, Heterocephalus glaber.
TLDR
The results suggest that ovulation is suppressed in subordinate non-breeding female naked mole-rats in captive and wild colonies, and show that plasma LH concentrations are significantly lower in these non- breeding females. Expand
Eusociality in African mole-rats: new insights from patterns of genetic relatedness in the Damaraland mole-rat (Cryptomys damarensis)
TLDR
It is shown that most breeding pairs in wild colonies of the Damaraland mole–rat are indeed unrelated and variation in the mean colony relatedness among populations provides support both for the central role played by ecological constraints in cooperative breeding and for the suggestion that inbreeding in naked mole–rats is a response to extreme constraints on dispersal. Expand
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