ENVIRONMENTAL NETWORKS, COMPENSATING LIFE HISTORIES AND HABITAT SELECTION BY WHITE-FOOTED MICE

被引：24

作者：

MORRIS, DW

机构：

[1] Department of Biology, Lakehead Centre for Northern Studies, Thunder Bay, P7b 5E1, Ontario

[2] School of Forestry, Lakehead University, Thunder Bay, P7b 5E1, Ontario

来源：

EVOLUTIONARY ECOLOGY | 1992年 / 6卷 / 01期

关键词：

EVOLUTION; HABITAT SELECTION; LIFE HISTORY; LITTER SIZE; ONTARIO; PEROMYSCUS; SEASONALITY;

D O I：

10.1007/BF02285330

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Analysis of 6 years' data on a population of free-living white-footed mice documents both phenotypic and environmental control of litter size. Litter size was positively correlated with maternal body size. Maternal size depended upon both seasonal and annual variation. Paradoxically, the proportion of small versus large litters varied among habitats independently of the effects of body size. The result is an influence of habitat on life history that yields patterns of reproduction and survival opposite to the predictions of demographic theory. The habitat producing the largest litters had a relatively high ratio of adult/juvenile survival. Litter size was small in the habitat where the adult/juvenile survival ratio was smallest. All of these anomalous patterns can be explained through density-dependent habitat selection by female white-footed mice. Life-history studies that ignore habitat and habitat selection may find spurious correlations among traits that result in serious misinterpretations about life history and its evolution.

引用

页码：1 / 14

页数：14

共 28 条

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