Luteinising hormone responses to single doses of exogenous GnRH in the solitary Cape mole- rat (Georychus capensis) and the social Natal mole-rat (Cryptomys hottentotus
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Gonadal steroid Hormone concentrations in the solitary Cape mole-rat and the social Natal mole-rat
Urinary gonadal steroid concentrations were measured and compared in the summer and winter for both the Cape mole-rat (Georychus capensis) and the Natal mole-rat (Cryptomys hottentotus natalensis). The Cape mole-rat breeds seasonally, with sexual activity and pregnancy recorded during the winter months in the southern hemisphere. Despite the fact that it has a distinct breeding season, the seas...
متن کاملThe reproductive biology of the solitary Cape mole- rat, Georychus capensis and the social Natal mole-rat, Cryptomys hottentotus natalensis (Rodentia: Bathyergidae)
The seasonality of wild caught Cape mole-rats was investigated, focusing on endocrine, neuroendocrine and neuroanatomical parameters. The Cape mole-rat reproduces only during the winter rainfall period of the western Cape Province. Interestingly, the gonadal steroid hormones do not show any significant seasonal patterns in either males or females. In addition, the pituitary does not exhibit a r...
متن کاملSubterranean Sympatry: An Investigation into Diet Using Stable Isotope Analysis
In the Western Cape three species of mole-rat occur in sympatry, however, little is known about differences in their dietary preferences. Dietary composition of the three species; the common mole-rat (Cryptomys hottentotus hottentotus), the Cape mole-rat (Georychus capensis) and the Cape dune mole-rat (Bathyergus suillus) were examined using stable isotope analysis. Blood, fur and claw samples ...
متن کاملFos expression in the suprachiasmatic nucleus in response to light stimulation in a solitary and social species of African mole-rat (family Bathyergidae).
Mole-rats are strictly subterranean rodents that are rarely exposed to environmental light. They are well adapted to their environment and have reduced eyes and a severely regressed visual system. It has been shown, however, that mole-rats do exhibit endogenous circadian rhythms that can be entrained, suggesting an intact and functional circadian system. To determine whether light is the entrai...
متن کاملAdult neurogenesis and its anatomical context in the hippocampus of three mole-rat species
African mole-rats (family Bathyergidae) are small to medium sized, long-lived, and strictly subterranean rodents that became valuable animal models as a result of their longevity and diversity in social organization. The formation and integration of new hippocampal neurons in adult mammals (adult hippocampal neurogenesis, AHN) correlates negatively with age and positively with habitat complexit...
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