Zschokke, Samuel. (2002) Distorted sex ratio at birth in the captive pygmy hippopotamus, Hexaprotodon liberiensis. Journal of mammalogy, Vol. 83, no. 3. pp. 674-681.
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Official URL: http://edoc.unibas.ch/dok/A5252268
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Abstract
The total captive population of the pygmy hippopotamus Hexaprotodon (= Choeropsis) liberiensis had a highly female biased sex ratio at birth (41% males), which exceeded most other known distorted sex ratios in captive mammals. Deviation from an even sex ratio was not compensated by a higher juvenile mortality of females. I examined possible causes of that deviation and could not find any association between offspring sex and inbreeding, parity, or mother's age. I found, however, a significant difference in sex ratios among different zoological gardens, suggesting that husbandry influenced sex at birth in the pygmy hippopotamus. Further analysis suggested that high feeding intensity and hands-on husbandry favored production of daughters. However, not all of the observed patterns and relationships could be explained by classic sex ratio theories.
| Faculties and Departments: | 05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Naturschutzbiologie (Baur) |
|---|---|
| UniBasel Contributors: | Zschokke, Samuel |
| Item Type: | Article, refereed |
| Article Subtype: | Research Article |
| Publisher: | American Society of Mammalogists |
| ISSN: | 0022-2372 |
| Note: | Publication type according to Uni Basel Research Database: Journal article |
| Last Modified: | 22 Mar 2012 14:28 |
| Deposited On: | 22 Mar 2012 14:04 |
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