Socially induced infertility in Ansell's mole-rat : are there depressed hormone levels in non-reproductive males and females?

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dc.contributor.author De Bruin, Phillippus Rudolf
dc.contributor.author Viljoen, Hermien
dc.contributor.author Sichilima, Alfred Matafwali
dc.contributor.author Bennett, Nigel C., 1961-
dc.date.accessioned 2012-02-09T06:15:22Z
dc.date.available 2013-01-31T10:07:45Z
dc.date.issued 2012-01
dc.description.abstract Ansell’s mole-rat, Fukomys anselli, is a social subterranean mammal and exhibits an extreme reproductive division of labour. Reproduction in the colony appears to be restricted usually to a single female. Complete colonies captured throughout an entire calendar year were euthanased and the histology of the gonads and plasma hormone concentrations were measured in reproductive and non-reproductive members of both sexes. In males, the circulating levels of testosterone were highest in the reproductive male. The mean testes mass for male corrected for body mass was lower than that of the non-reproductive male. However, the mean testes volume of reproductive males was greater than that for the non-reproductive males and the seminiferous tubule diameter was greater in reproductive males. Reproductive females characteristically possessed corpora lutea of ovulation and pregnancy in their ovaries and this was met with much elevated progesterone concentrations in these females. In contrast, non-reproductive females showed a complete range of follicular genesis, but they did not possess corpora lutea of ovulation or pregnancy, in turn they show depressed progesterone concentrations. The current available evidence suggests that in Ansell’s mole-rats, the non-reproductive males and females refrain from sexual activity by being subordinate and moreover related to the breeding pair. en
dc.description.librarian nf2012 en
dc.description.sponsorship The research was funded by the SARCHI Chair of mammal behavioural ecology and physiology from the Department of Science and Technology and the National Research Foundation, South Africa (to N.C Bennett). We also acknowledge a bursary from the NRF (to P.R de Bruin). en_US
dc.description.uri http://www3.interscience.wiley.com/journal/118535410/home-8369 en_US
dc.identifier.citation De Bruin, PR, Viljoen, H, Sichilima, AM & Bennett, NC 2012, 'Socially induced infertility in Ansell's mole-rat: are there depressed hormone levels in non-reproductive males and females', Journal of Zoology, vol. 286, no. 1, pp. 15-21. en
dc.identifier.issn 0952-8369 (print)
dc.identifier.issn 1469-7998 (online)
dc.identifier.other 10.1111/j.1469-7998.2011.00841.x
dc.identifier.uri http://hdl.handle.net/2263/18056
dc.language.iso en en_US
dc.publisher Wiley-Blackwell en_US
dc.rights © 2011 The Authors. Journal of Zoology © 2011 The Zoological Society of London. This article is embargoed by the publisher until January 2013. en
dc.subject Fukomys anselli en
dc.subject Ansell's mole-rat en
dc.subject.lcsh Rats -- Reproduction -- Social aspects en
dc.subject.lcsh Infertility in animals -- Social aspects en
dc.subject.lcsh Animal behavior -- Endocrine aspects en
dc.subject.lcsh Hormones en
dc.title Socially induced infertility in Ansell's mole-rat : are there depressed hormone levels in non-reproductive males and females? en
dc.type Postprint Article en


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