Seasonal change in the opportunity for sexual selection

0093562 - ÚBO 2008 RIV GB eng J - Journal Article
Reichard, Martin - Smith, C. - Bryja, Josef
Seasonal change in the opportunity for sexual selection.
[Sezónní změny v potenciálu pohlavního výběru.]
Molecular Ecology. Roč. 17, č. 2 (2008), s. 642-651. ISSN 0962-1083. E-ISSN 1365-294X
R&D Projects: GA AV ČR KJB600930501
Grant - others:British Ecological Society(GB) ECPG 551/617
Institutional research plan: CEZ:AV0Z60930519
Keywords : bitterling * body size * sexual selection * mating success * reproductive skew
Subject RIV: EH - Ecology, Behaviour
Impact factor: 5.325, year: 2008
http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-294X.2007.03602.x

We investigated seasonal changes in variation in reproductive success, measured as the opportunity for sexual selection, using parentage analysis in 20 experimental populations of the bitterling, a small freshwater fish with a promiscuous, resource-based mating system. We showed that although the largest males sired most offspring over the entire reproductive season, variation in reproductive success and hence the opportunity for sexual selection was low at the start of the season but increased significantly at its end. This seasonal difference probably arose from the superior competitive endurance of large males and from a higher temporal clustering of reproductively active females at the start of the breeding season than later in the season. The spatial distribution of oviposition sites had a negligible effect on the variation in reproductive success. We discuss the potential implications of our results for the importance and strength of sexual selection in natural populations.

V této studii jsme sledovali sezónní změny v reprodukční úspěšnosti (měřené indexem příležitosti k pohlavnímu výběru) u 20 experimentálních populací hořavky duhové. Zjistili jsme, že potenciál k pohlavnímu výběru je silně sezónní a v práci diskutujeme možné implikace pro teorii pohlavního výběru v přírodních populacích.
Permanent Link: http://hdl.handle.net/11104/0153580