STATE-DEPENDENT IDEAL FREE DISTRIBUTIONS

被引：73

作者：

MCNAMARA, JM

HOUSTON, AI

机构：

[1] School of Mathematics, University of Bristol, Bristol, BS8 1TW, University Walk

[2] NERC Unit of Behavioural Ecology, Department of Zoology, University of Oxford, Oxford

来源：

EVOLUTIONARY ECOLOGY | 1990年 / 4卷 / 04期

关键词：

Ideal free distribution; patch choice; predation; starvation; state dependent decisions;

D O I：

10.1007/BF02270929

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The standard ideal free distribution (IFD) states how animals should distribute themselves at a stable competitive equilibrium. The equilibrium is stable because no animal can increase its fitness by changing its location. In applying the IFD to choice between patches of food, fitness has been identified with the net rate of energetic gain. In this paper we assess fitness in terms of survival during a non-reproductive period, where the animal may die as a result of starvation or predation. We find the IFD when there is a large population that can distribute itself between two patches of food. The IFD in this case is state-dependent, so that an animal's choice of patch depends on its energy reserves. Animals switch between patches as their reserves change and so the resulting IFD is a dynamic equilibrium. We look at two cases. In one there is no predation and the patches differ in their variability. In the other, patches differ in their predation risk. In contrast to previous IFDs, it is not necessarily true that anything is equalized over the two patches. © 1990 Chapman and Hall Ltd.

引用

页码：298 / 311

页数：14

共 23 条

[1]

Abraha M.V., Dill L.M., A determination of the energetic equivalence of the risk of predation, Ecol., 70, pp. 999-1007, (1989)

[2]

Caraco T., Lima S.L., Survivorship, energy budgets and foraging risk, Quantitative Analyses of Behavior, (1987)

[3]

Fagen R., A generalized habitat matching rule, Evol. Ecol., 1, pp. 5-10, (1987)

[4]

Fretwell S.D., Lucas H.L., On territorial behaviour and other factors influencing habitat distribution in birds, Acta Biotheoretica, 19, pp. 16-36, (1970)

[5]

Harper D.G.C., Competitive foraging in mallards: ‘ideal free’ ducks, Anim. Behav., 30, pp. 575-84, (1982)

[6]

Houston A.I., McNamara J.M., Evaluating the selection pressure on foraging decisions, Relevance of Models and Theories in Ethology, pp. 61-75, (1986)

[7]

Houston A.I., McNamara J.M., Singing to attract a mate: a stochastic dynamic game, J. Theor. Biol., 129, pp. 57-68, (1987)

[8]

Houston A.I., McNamara J.M., Fighting for food: a dynamic version of the Hawk-Dove game, Evol. Ecol., 2, pp. 51-64, (1988)

[9]

Houston A.I., McNamara J.M., The value of food: effects of open and closed economies, Anim. Behav., 37, pp. 546-62, (1989)

[10]

Lima S.L., Maximizing feeding efficiency and minimizing time exposed to predators: a trade-off in the black-capped chickadee, Oecolog., 66, pp. 60-7, (1985)

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