期刊
COMPTES RENDUS PALEVOL
卷 10, 期 5-6, 页码 469-478出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crpv.2011.03.007
关键词
Large herbivores; Paleohistology; Life History; Paleodemography; Insularity; Ecology
类别
资金
- Ministerio de Ciencia e Innovacion (MICINN) [CGL2008-06204/BTE, BES-2009-02641, JCI-2010-08157]
- ICREA Funding Source: Custom
Hard tissue histology is a valuable tool to reconstruct life history traits in fossil ungulates. We estimated certain fitness components (age at weaning, age at maturity, life span and generation time) in two fossil bovids that evolved under different selective regimes, the insular Myotragus balearicus and the continental Gazella borbonica. Our results provide evidence that the mainland G. borbonica conforms to the predictions for ungulates of similar body size. However, the insular M. balearicus does not fit predictions from body mass scaling, as it shows an important delay in age at weaning and, especially, in age at first reproduction. The considerable differences in the onset of these fitness components reflect the differences in resource availability and in extrinsic mortality that exist between insular and continental ecosystems. The significant delay in life history traits in Myotragus most likely resulted in severe constraints on the ability of this insular mammal to respond to ecological disturbances. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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