DIMENSIONLESS INVARIANTS FROM FORAGING THEORY MARGINAL VALUE THEOREM

被引:29
作者
CHARNOV, EL [1 ]
PARKER, GA [1 ]
机构
[1] UNIV LIVERPOOL, DEPT ENVIRONM & EVOLUTIONARY BIOL, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND
关键词
DUNG FLIES; INSECT MATING SYSTEMS; SPERM COMPETITION; PHENOTYPIC PLASTICITY; PATCHY ENVIRONMENT;
D O I
10.1073/pnas.92.5.1446
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Copula duration (t) decreases, and proportional rate of sperm transfer (c) increases, with larger male body size in dung flies, so their dimensionless product (c . t) is approximately constant (approximate to 2.2). The most recent copulating male fertilizes about 89% of the eggs laid (= 1 - e(-c . t) = 1 e(-2 . 2)), independent of his body size. The conditions under which natural selection favors this phenotypic invariance are studied with fitness optimization models, The dimensionless rules for optimal patch residence times are then generalized to cover phenotypic variation in other foraging cases.
引用
收藏
页码:1446 / 1450
页数:5
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