Sperm length variation as a predictor of extrapair paternity in passerine birds

0349461 - ÚBO 2011 RIV US eng J - Článek v odborném periodiku
Lifjeld, J. T. - Laskemoen, T. - Kleven, O. - Albrecht, Tomáš - Robertson, R. J.
Sperm length variation as a predictor of extrapair paternity in passerine birds.
PLoS ONE. Roč. 5, č. 10 (2010), e13456. ISSN 1932-6203. E-ISSN 1932-6203
Grant CEP: GA MŠMT LC06073
Výzkumný záměr: CEZ:AV0Z60930519
Klíčová slova: postcopulatory sexual selection * pair paternity * intraspecific variation * molecular phylogeny * mating systems * zebra finch
Kód oboru RIV: EG - Zoologie
Impakt faktor: 4.411, rok: 2010

We collected sperm samples from 55 passerine species in Canada and Europe for which extrapair paternity rates were already available from either the same (n = 24) or a different (n = 31) study population. We measured the total length of individual spermatozoa and found that both the coefficient of between-male variation (CVbm) and within-male variation (CVwm) in sperm length were strong predictors of the rate of extrapair paternity, explaining as much as 65% and 58%, respectively, of the variation in extrapair paternity among species. However, only the CVbm predictor was independent of phylogeny, which implies that it can readily be converted into a currency of extrapair paternity without the need for phylogenetic correction.
Trvalý link: http://hdl.handle.net/11104/0189695