Sokoine University of Agriculture

Pattern of ovulation in an ancient, solitary mole-rat lineage: Heliophobius argenteocinereus emini from Tanzania

Show simple item record Katandukila, J. V. Ngalameno, M. K. Mgode, G. F. Bastos, A. D. S. Bennett, N. C. 2020-07-23T07:05:41Z 2020-07-23T07:05:41Z 2017
dc.description Canadian Journal of Zoology 95(10):737-743 · October 2017  en_US
dc.description.abstract Heliophobius is an ancient subterranean rodent lineage within the family Bathyergidae, that displays seasonal breeding over a broad geographical range. In East Africa, reproduction in these solitary mole-rats has been shown to coincide with the long rains, but it is not clear whether Heliophobius argenteocinereus emini (Noack 1894) from Tanzania is an induced or spontaneous ovulator. To address this, urinary progesterone was measured every second day over a period of 132 days in six wild-caught females subjected to three sequential experimental treatments. In the first, control (C) treatment, females were housed singly for a period of 44 days, following which non-physical contact (NPC) with a vasectomised male and then physical contact (PC) with the same vasectomised male, occurred, in each of the subsequent 44-day treatments. Non-invasive monitoring of ovarian cyclicity confirmed that mean urinary progesterone concentration was higher during PC than during either NPC or C, despite the fact that the males were vasectomised and incapable of fertilising the females. Examination of penile morphology revealed that males possess epidermal projections on the glans penis which probably bring about cervical stimulation during coitus. These findings together with the female progesterone profiles imply the species is an induced ovulator stimulated by penile intromission. en_US
dc.language.iso en en_US
dc.subject Heliophobius en_US
dc.subject Progesterone en_US
dc.subject Ovulation en_US
dc.subject Penile spines en_US
dc.subject Coitus en_US
dc.title Pattern of ovulation in an ancient, solitary mole-rat lineage: Heliophobius argenteocinereus emini from Tanzania en_US
dc.type Working Paper en_US
dc.url en_US

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