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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Sperm competition in tropical versus temperate zone birds
Tunisie Medicale, Volume 91, No. 2, Year 2013
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Description
Sperm competition represents an important component of post-copulatory sexual selection. It has been argued that the level of sperm competition declines in birds towards the equator. However, to date, sperm competition estimates have been available mainly for avian species inhabiting the northern temperate zone. Here we apply a novel approach, using the coefficient of between-male variation (CVbm) in sperm size as an index for sperm competition risk, in a comparative analysis of 31 Afrotropical and 99 northern temperate zone passerine species. We found no difference in sperm competition risk between the two groups, nor any relationship with migration distance. However, a multivariate model indicated that sperm competition risk was highest in species with a combination of low body mass and few eggs per clutch. The effect of clutch size was most pronounced in tropical species, which indicates that sperm competition risk in tropical and temperate species is differently associated with particular life-history traits. Although tropical species had lower sperm competition risk than temperate zone species for overlapping clutch sizes, the idea of a generally reduced risk of sperm competition in tropical birds was not supported by our analysis. © 2012 The Author(s) Published by the Royal Society. All rights reserved.
Authors & Co-Authors
Albrecht, Tomas
Czech Republic, Brno
Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic
Czech Republic, Prague
Charles University
Kleven, Oddmund
Norway, Oslo
Universitetet I Oslo
Norway, Trondheim
Trondheim Hovedkontor
Kreisinger, Jakub
Czech Republic, Prague
Charles University
Laskemoen, Terje
Norway, Oslo
Universitetet I Oslo
Omotoriogun, Taiwo Crossby
Nigeria, Jos
University of Jos
Ottosson, Ulf
Nigeria, Jos
University of Jos
Reif, Jiří
Czech Republic, Prague
Univerzita Karlova, Ústav Pro Životní Prostředí
Sedláček, Ondřej
Czech Republic, Prague
Charles University
Hořák, David
Czech Republic, Prague
Charles University
Robertson, Raleigh J.
Canada, Kingston
Queen’s University
Lifjeld, Jan T.
Norway, Oslo
Universitetet I Oslo
Statistics
Citations: 27
Authors: 11
Affiliations: 7
Identifiers
Doi:
10.1098/rspb.2012.2434
ISSN:
00414131
Research Areas
Sexual And Reproductive Health
Participants Gender
Male