Forum Synchrony, asynchrony, and temporally random mating: a new method for analyzing breeding synchrony
نویسندگان
چکیده
Much research has focused on understanding breeding synchrony in animals and its relationship to such issues as mating systems and extrapair copulations in birds (Birkhead and Biggins, 1987; Emlen and Oring, 1977; Knowlton, 1979; Stutchbury and Morton, 1995). To empirically examine synchrony, one needs an appropriate measure of the degree of synchrony in a population. Kempenaers (1993) presented an index of breeding synchrony (modified from Björklund and Westman, 1986) that has gained wide use as a simple representation of the degree to which breeding is synchronized among animals. This synchrony index (SI) is calculated as follows:
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