Female reproductive success in captive Ammotragus lervia (Bovidae, Artiodactyla). Study of its components and effects of hierarchy and inbreeding

被引:35
作者
Cassinello, J
Alados, CL
机构
[1] Estac. Experimental de Zonas Aridas, 04001-Almería
[2] Inst. Pirenaico de Ecología, 50080 Zaragoza
关键词
D O I
10.1111/j.1469-7998.1996.tb05442.x
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Four components of female reproductive success in captive Saharan arrui (Barbary sheep), Ammotragus lervia sahariensis (Rothschild, 1913), have been analysed: longevity, fecundity, offspring one-month survival rate and the age of first birth. Longevity accounts for 69.9% of the variance of reproductive success, fecundity for 54.2%, offspring one-month survival rate for 29.8%, and the age at first birth for 10.4%. A detailed study of these components leads to the following conclusions: (a) longevity is higher in those individuals in better physical condition; (b) fecundity is related to age and social rank; (c) heavier offspring at birth have a higher probability of surviving during their first month of life; and (d) the age at first birth is delayed by high levels of population density, inbreeding coefficients, and birth weights. On the other hand, high-ranking females are characterized by shorter inter-birth intervals and give birth to a higher proportion of twins.
引用
收藏
页码:141 / 153
页数:13
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