Egg size variation in the context of polyandry: a case study using long-term field data from snowy plovers.

Autor:	Eberhart-Hertel LJ; Department of Ornithology, Max Planck Institute for Biological Intelligence, Seewiesen, Germany.; Research Group Behavioural Genetics and Evolutionary Ecology, Max Planck Institute for Biological Intelligence, Seewiesen, Germany., Rodrigues LF; Department of Ecology, Autonomous University of Madrid, Madrid, Spain.; Department of Life Sciences, Imperial College London, Silwood Park Campus, United Kingdom., Krietsch J; Department of Ornithology, Max Planck Institute for Biological Intelligence, Seewiesen, Germany., Hertel AG; Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany., Cruz-López M; Institute of Ocean Sciences and Limnology, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico., Vázquez-Rojas KA; Research Group Behavioural Genetics and Evolutionary Ecology, Max Planck Institute for Biological Intelligence, Seewiesen, Germany., González-Medina E; Conservation Biology Research Group, Department of Anatomy, Cell Biology and Zoology, University of Extremadura, Badajoz, Spain., Schroeder J; Department of Life Sciences, Imperial College London, Silwood Park Campus, United Kingdom., Küpper C; Research Group Behavioural Genetics and Evolutionary Ecology, Max Planck Institute for Biological Intelligence, Seewiesen, Germany.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2023 Dec 02; Vol. 77 (12), pp. 2590-2605.
DOI:	10.1093/evolut/qpad168
Abstrakt:	Gamete size variation between the sexes is central to the concept of sex roles, however, to what extent gamete size variation within the sexes relates to sex role variation remains unclear. Comparative and theoretical studies suggest that, when clutch size is invariable, polyandry is linked to a reduction of egg size, while increased female-female competition for mates favors early breeding when females cannot monopolize multiple males. To understand whether and how breeding phenology, egg size, and mating behavior are related at the individual level, we studied the reproductive histories of 424 snowy plover females observed in the wild over a 15-year period. Egg size, but not polyandry, were highly repeatable for individual females. Consistent with theoretical predictions, we found that polyandrous females were the earliest breeders and that early clutches contained smaller eggs than clutches initiated later. Neither egg size nor mating behavior showed clear signs of an age-related deterioration, on the contrary, prior experience acquired either through age or local recruitment enabled females to nest early. Taken together, these results suggest that gamete size variation is not linked to mating behavior at the individual level, and, consequently, the adaptive potential of such variation appears to be limited. (© The Author(s) 2023. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE).)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu