Reduced cost of reproduction in moose Alces Alces through human harvest

被引:0
|
作者
Ericsson, G [1 ]
机构
[1] Swedish Univ Agr Sci, Dept Anim Ecol, SE-90183 Umea, Sweden
来源
ALCES 37(1) | 2001年 / 37卷 / 01期
关键词
hunting; life history; moose; predation; reproduction; selection; survival;
D O I
暂无
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
In life history theory there is a cost related with all resource allocation. For female moose (Alces alces), the cost of reproduction in terms of survival may be reduced for females if calves, or cows without calves, are selectively hunted during the fall. Cows with calves might experience higher hunting survival and therefore face a reduced trade-off between survival and reproduction. This hypothesis was tested during a 7-year study in northern Sweden. Female age and whether she had given birth or not best explained female moose survival during the hunting period, not the number of calves born or alive at the hunt. Still, the analysis suggests that the cost of reproduction was reduced for middle-aged females. Females not giving birth experienced a 3.2-fold greater risk of being harvested compared to those giving birth. This suggests that the application of life-history theory is crucial to fully understand the evolutionary consequences of management decisions on heavily harvested populations of ungulates.
引用
收藏
页码:61 / 69
页数:9
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