THE RISKS OF PARENTHOOD .1. GENERAL-THEORY AND APPLICATIONS

被引：54

作者：

CLARK, CW

YDENBERG, RC

机构：

[1] Institute of Applied Mathematics, University of British Columbia, Vancouver, V6T 1Y4, British Columbia

[2] Behavioral Ecology Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, British Columbia

来源：

EVOLUTIONARY ECOLOGY | 1990年 / 4卷 / 01期

关键词：

Atlantic puffin; defense of offspring; dynamic programming; life history theory; Provisioning;

D O I：

10.1007/BF02270712

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

We use contemporary life history theory to analyze parental decisions concerned with the defense of offspring, and with the provisioning of offspring in the presence of risk. In achieving the optimal level of parental investment, the parent faces a tradeoff between present and future reproductive success. Our models, which are based on stochastic dynamic programming, lead to predictions of the following kind: (i) offspring will be defended more vigorously as they grow older; (ii) long-lived species will accept fewer risks in caring for offspring than short-lived species; (iii) parents living in permanently riskier environments will defend their offspring more vigorously than parents in less risky environments; (iv) however, temporary increases in risk will result in temporarily less vigorous defense and provisioning of offspring. The models also show that parents and their offspring have different conceptions of the optimal level of parental investment. The flexibility of our modeling approach as a method of analyzing facultative behavior is also emphasized. Finally, we apply the methods of this paper to analyze fledging behavior of Atlantic puffins. © 1990 Chapman and Hall Ltd.

引用

页码：21 / 34

页数：14

共 22 条

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