INDUCIBLE DEFENSES AND THE ALLOCATION OF RESOURCES - A MINIMAL MODEL

被引:119
作者
CLARK, CW [1 ]
HARVELL, CD [1 ]
机构
[1] CORNELL UNIV, DIV BIOL SCI, ECOL & SYSTEMAT SECT, ITHACA, NY 14853 USA
关键词
D O I
10.1086/285342
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 dynamic-optimization models to assess the relative fitness consequences of inducible versus constitutive defense strategies. Our models assess the cost of defense in terms of reduced growth and reproduction of the defended organism. Resources are assumed to be allocated to growth, defense, or reproduction via a time- and state-dependent strategy that either does (in the inducible case) or does not (in the constitutive case) depend on the current predation threat. Inducible defenses are shown to be superior whenever predator attacks are unpredictable and sufficiently sustained (once initiated) for the defense to become effective. In the case of inducible defenses, the relative delays involved in switching among growth, reproduction, and defense are shown to be important determinants of the optimal allocation strategy.
引用
收藏
页码:521 / 539
页数:19
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