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High levels of inbreeding in captive Ammotragus lervia (Bovidae, Artiodactyla): effects on phenotypic variables

AuthorsCassinello, Jorge
KeywordsAmmotragus lervia
Phenotypic variables
Issue Date1997
PublisherNRC Research Press
CitationCanadian Journal of Zoology 75(10): 1707-1713 (1997)
AbstractVariables that may affect birth mass and adult body mass/length in captive Saharan arruis (aoudads), Ammotragus lervia, were analyzed. Whenever enough data were available, the following variables were considered: age, sex, type of parturition (singleton versus twins), birth mass, nursing status (single versus effective twinning), maternal age, and individual inbreeding coefficient. Previous considerations and strong sexual dimorphism made it advisable to perform separate analyses for males and females. As expected, there was a positive relationship between age and growth. As adults, singleton females were larger than females that had a littermate; also, females raised by older mothers were heavier at sexual maturity. Birth mass, maternal age, and individual inbreeding coefficient had no effect on adult phenotype. At birth there already appeared to be significant sexual dimorphism, and singletons were heavier than twins. High inbreeding coefficients yielded lighter calves. Finally, birth mass increased with maternal age but was not affected by season of birth.
Publisher version (URL)http://dx.doi.org/10.1139/z97-797
Appears in Collections:(IREC) Artículos
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