Inter-birth interval in zebras is longer following the birth of male foals than after female foals

Show simple item record Barnier, Florian Grange, Sophie Ganswindt, Andre Ncube, Hlengisizwe Duncan, Patrick 2012-12-12T06:15:39Z 2012-12-12T06:15:39Z 2012-07
dc.description.abstract Mammalian reproductive rates vary among individuals for physiological and environmental reasons. This study aims to determine reproductive rates from an individually monitored population of wild Plains zebras Equus quagga, and to assess the sources of variability in inter-birth intervals. The animals were monitored, where possible, every six months from 2004 to 2011. Thirty nine intervals corresponding to 65 births in 26 mares were identified, using direct observations and faecal steroid monitoring. Mean foaling rate of the population is 0.74 foal/year, and comparable with the literature. There was no significant effect of mother’s age, nor of the season of previous birth on the length of inter-birth intervals. Inter-birth interval was significantly longer when the first foal was a male. This finding indicates that additional costs of having a son may delay future reproduction and thus reduce the total number of offspring a mare can have during her lifetime. Individually-based data provide critical information on the determinants of reproductive rates, and are therefore a key to understanding the causes of variations in life-history traits. en
dc.description.sponsorship The Ministère Français des Affaires Etrangères for supporting Hlengisizwe Ncube through the French Embassy in Zimbabwe (RP-PCP grant ECOL#2). en
dc.description.uri en
dc.identifier.citation Florian Barnier, Sophie Grange, Andre Ganswindt, Hlengisizwe Ncube & Patrick Duncan, Inter-birth interval in zebras is longer following the birth of male foals than after female foals, Acta Oecologica, vol. 42, pp. 11-15 (2012), doi: 10.1016/j.actao.2011.11.007 en
dc.identifier.issn 1146-609X (print)
dc.identifier.issn 1873-6238 (online)
dc.identifier.other 10.1016/j.actao.2011.11.007
dc.identifier.other 6507085906
dc.identifier.other G-9856-2014
dc.language.iso en en
dc.publisher Elsevier en
dc.rights © 2011 Elsevier. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Acta Oecologica. 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 Acta Oecologica, vol 42, July 2012, doi: 10.1016/j.actao.2011.11.007. en
dc.subject Equus quagga en
dc.subject Inter-birth interval en
dc.subject Foaling rate en
dc.subject Non-invasive hormone monitoring en
dc.subject Sex en
dc.subject.lcsh Zebras -- Reproduction en
dc.subject.lcsh Foals en
dc.title Inter-birth interval in zebras is longer following the birth of male foals than after female foals en
dc.type Postprint Article en

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