Sex Allocation (Monographs in Population Biology) by Stuart West

By Stuart West

Recent many years have witnessed an explosion of theoretical and empirical reviews of intercourse allocation, reworking how we comprehend the allocation of assets to female and male replica in vertebrates, invertebrates, protozoa, and vegetation. during this landmark ebook, Stuart West synthesizes the large literature on intercourse allocation, supplying the conceptual framework the sphere has been missing and demonstrating how sex-allocation reports can make clear broader questions in evolutionary and behavioral biology.

West clarifies basic misconceptions within the software of thought to empirical facts. He examines the field's successes and screw ups, and describes the examine parts the place a lot very important paintings is but to be performed. West finds how a shared underlying theoretical framework unites findings of sex-ratio version throughout a major diversity of existence kinds, from malarial parasites and hermaphroditic worms to sex-changing fish and mammals. He indicates how study on intercourse allocation has been significant to many serious questions and controversies in evolutionary and behavioral biology, and he argues that sex-allocation study serves as a key trying out floor for various theoretical methods and will aid get to the bottom of debates approximately social evolution, parent-offspring clash, genomic clash, and degrees of selection.

Certain to turn into the defining booklet at the topic for the subsequent new release of researchers, Sex Allocation explains why the research of intercourse allocation offers a great version process for advancing our knowing of the limitations on version between all dwelling issues within the common world.

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Extra info for Sex Allocation (Monographs in Population Biology)

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Within populations) than to predict population sex ratios (West and Sheldon 2002). I illustrate this with a discussion of one of the areas that is best understood theoretically: LRE when offspring cooperate and help their parents to rear further offspring. In many cooperatively breeding vertebrates, offspring of one sex are more likely to remain in the natal group (nest) and help their parents rear further offspring. In birds, males are usually (but not always) more likely to stay and help at the nest, while in mammals, females are often more likely to remain and help (Clutton-Brock et al.

This would lead to a sex ratio that would be biased according to the relative encounter rate with hosts suitable for male and female offspring. Similarly, if male and female hosts occur in the same habitat, then females are predicted to lay an appropriate egg in all hosts encountered, with the sex ratio depending on the relative rate at which male and female hosts are encountered. 1. The population sex ratio for autoparasitoids whose reproductive success can be egg or time limited (redrawn from Hunter and Godfray 1995).

2562–2563) has suggested that the reason for Darwin’s retraction is that he was assuming monogamy and realized that his argument for an equal sex ratio relied on maximizing the number of monogamous mated pairs, which is a species selection argument. The relevant extracts are as follows: Let us now take the case of a species producing . . an excess of one sex— we will say of males—these being superfluous and useless, or nearly useless. Could the sexes be equalised through natural selection? We may feel sure, from all characters being variable, that certain pairs would produce a somewhat less excess of males over females than other pairs.

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