The pattern of ovulation in the southern African spiny mouse (Acomys spinosissimus)

Show simple item record De Bruin, Phillippus Rudolf Ganswindt, Andre Bennett, Nigel C., 1961- Medger, Katarina 2014-07-29T11:52:20Z 2014-07-29T11:52:20Z 2014-09
dc.description.abstract The pattern of ovulation in mammals is generally considered to be either spontaneous or induced by coitus. The present study aimed to assess the pattern of ovulation in the southern African spiny mice (Acomys spinosissimus). Females were divided into three treatments differing in the degree of contact with a male. Control females had no contact with males, separated females had only chemical, auditory and visual contact with a male as the sexes were separated with wire mesh and paired females had full contact with a vasectomized male and copulations were possible. Each treatment consisted of seven females and the ovarian mass, the number of primary, secondary/tertiary and Graafian follicles as well as presence of corpora lutea were compared between the three treatments. Faecal progestagen metabolite (FPM) concentrations were analysed for every second day throughout the experiment and they were used to determine luteal phases and oestrous cycles. Corpora lutea were found in both the control and the paired treatment indicating that ovulation also occurred in the absence of coitus. There was also no effect of treatment on ovarian mass or follicle numbers. In contrast, only females in the separated and paired treatments exhibited luteal phases and oestrous cycles. Especially at the beginning of the experiment, FPM concentrations were higher in those two groups than the control. The results indicate that A. spinosissimus appears to ovulate spontaneously, although physical as well as olfactory male cues appear to be of great importance to enhance reproductive efforts of females. en_US
dc.description.librarian hb2014 en_US
dc.description.sponsorship SARChI Chair for Mammal Behavioural Ecology and Physiology, National Research Foundation of South Africa and the University of Pretoria en_US
dc.description.uri /mambio en_US
dc.identifier.citation De Bruin, PR, Ganswindt, A, Bennett, NC & Medger, K 2014, 'The pattern of ovulation in the southern African spiny mouse (Acomys spinosissimus)', Mammalian Biology, vol. 79, no. 5, pp. 318-324. en_US
dc.identifier.issn 1616-5047 (print)
dc.identifier.issn 1618-1476 (online)
dc.identifier.other 10.1016/j.mambio.2014.05.003
dc.identifier.other 6507085906
dc.identifier.other G-9856-2014
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2014 Elsevier GmbH. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Mammalian Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Mammalian Biology, vol. 79, no. 5, pp.318-324, 2014. doi : 10.1016/j.mambio.2014.05.003. en_US
dc.subject Spontaneous ovulation en_US
dc.subject Induced ovulation en_US
dc.subject Progestagens en_US
dc.subject Corpora lutea en_US
dc.subject African spiny mouse (Acomys spinosissimus) en_US
dc.title The pattern of ovulation in the southern African spiny mouse (Acomys spinosissimus) en_US
dc.type Postprint Article en_US

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