Adult sex ratio and operational sex ratio exhibit different temporal dynamics in the wild

María Cristina Carmona-Isunza, Sergio Ancona, Tamás Székely, Alfonso P. Ramallo-González, Medardo Cruz-López, Martín Alejandro Serrano-Meneses and Clemens Küpper

Behavioral Ecology, 2017, vol. 28, issue 2, 523-532

Abstract: Lay Summary Sex ratios vary within wild populations, but these variations and the relationship of different sex ratio indices are rarely explored. Using data from a well-monitored polygamous bird population, we show that adult sex ratio (ASR, proportion of males in adult population) and operational sex ratio (OSR, ratio of sexually active males to females) fluctuate over the breeding season and these fluctuations are not correlated, suggesting that OSR is a poor predictor of ASR under polygamy.

Keywords: adult sex ratio; mating system; operational sex ratio; social environment; temporal variation; within-season variation. (search for similar items in EconPapers)
Date: 2017
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