Download E-books The Arctic Skua: A study of the ecology and evolution of a seabird PDF

By Peter O'Donald

This e-book describes the result of a long term research of the ecology, evolutionary genetics and sociobiology of a seabird, the Arctic Skua. This species is polymorphic: the birds exhibit one among 3, genetically assorted types of plumage - light, intermediate and darkish. The types range in frequency from predominantly light within the north to darkish within the south. The research used to be undertaken with the purpose of explaining how typical and sexual choice act to keep up all 3 types of skua in its populations. the implications exhibit that normal choice for faded is balanced via sexual choice for intermediate and darkish. types derived from Darwin's theories of girl selection and sexual choice in monogamous birds healthy the breeding information of the Arctic Skua. Darwibn's perspectives on sexual choice are totally proven. The learn produced unique facts on breeding ecology, demography, inhabitants legislation, sexual behaviour and territoriality. A bankruptcy on feeding ecology can also be incorporated within the e-book, which provides an entire and principally unique account of the inhabitants ecology and sociobiology of a unmarried species of chook.

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