FEMALE-BIASED MORTALITY IN A SEXUALLY DIMORPHIC UNGULATE - FERAL CATTLE OF AMSTERDAM-ISLAND

被引：27

作者：

BERTEAUX, D ^{[1
]}

机构：

[1] CTR ETUD BIOL CHIZE,F-79360 BEAUVOIR NIORT,FRANCE

来源：

JOURNAL OF MAMMALOGY | 1993年 / 74卷 / 03期

关键词：

BOS-TAURUS; UNGULATE; SEXUAL DIMORPHISM; SEX RATIO; AMSTERDAM-ISLAND; INDIAN OCEAN;

D O I：

10.2307/1382295

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

I investigated the scale and pattern of mortality among feral cattle (Bos taurus) occurring on Amsterdam Island in 1988 to test hypotheses related to sexual dimorphism. Because cattle are sexually dimorphic ungulates and all deaths apparently were due to starvation, mortality was expected to be biased towards males. Mortality of juvenile males was higher than that of juvenile females (22.4 versus 11.7%), but mortality of adult males was lower than that of females (18.3 versus 47.7%). Causes for differential survival in adult age-classes are uncertain, but could involve sex differences in use of habitat, or consequences of previous selection during domestication.

引用

页码：732 / 737

页数：6

共 31 条

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