Do solitary, seismic signalling Cape mole-rats (Georychus capensis) demonstrate spontaneous or induced ovulation?

The Cape mole-rat Georychus capensis is a solitary subterranean rodent that exhibits seasonal reproduction. This study set out to determine whether the female Cape mole-rat is an induced or spontaneous ovulator. Eleven females were collected from the field just before the breeding season and housed...

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Bibliographic Details
Published in:Journal of zoology (1987) 2005-09, Vol.267 (1), p.75-80
Main Authors: van Sandwyk, James H. d. T., Bennett, Nigel C.
Format: Article
Language:English
Subjects:
Animal reproduction
Bathyergidae
Cape mole-rat
Georychus
induced ovulation
progesterone
Rodents
Zoology
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Summary:The Cape mole-rat Georychus capensis is a solitary subterranean rodent that exhibits seasonal reproduction. This study set out to determine whether the female Cape mole-rat is an induced or spontaneous ovulator. Eleven females were collected from the field just before the breeding season and housed individually. Urine was collected for 5 weeks. Females were subjected to one of three trials: housed separately without a male; allowed only non-physical contact with unvasectomized males; placed in direct contact with four vasectomized males. Urine was collected for a further 5 weeks and urinary progesterone profiles established. Females housed in direct contact with males exhibited heightened progesterone concentrations and the presence of corpora lutea in their ovaries. The act of coitus seems to be necessary for ovulation to occur in the females even though males were not capable of fertilization.
ISSN:0952-8369
1469-7998
DOI:10.1017/S0952836905007302