Nom du corpus

Corpus Systématique Animale

Titre du document

Extra-pair paternity, sperm competition and the evolution of testis size in birds

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Birds
  • Extra-pair paternity
  • Testis mass Sperm competition
  • Control of paternity
Nom du fichier dans la ressource
Oiseaux_v2b_02828
Auteur(s)
  • A. P. Moller 1
  • J. V. Briskie 2
Affiliation(s)
  • 1) Zoological Institute, Copenhagen University, Universitetsparken 15, DK-2100, Copenhagen, Ø, Denmark
  • 2) Department of Biology, Queen's University, K7L 3N6, Kingston, Ontario, Canada
Résumé

Sperm competition should select for increased sperm production if the probability of fertilization by a specific male is proportional to the relative number of sperm inseminated. A review of the literature generally supports the predicted positive association between sperm production or allocation and various measures of the presumed intensity of sperm competition. However, it is not clear how increased sperm competition is related to extra-pair paternity, and it remains unknown whether certainty of paternity should be associated with relative testis size. Based on a large sample of bird species with information on extra-pair paternity gathered from the literature, we demonstrate that testis mass is related positively to the level of extra-pair paternity, after controlling for body size and phylogeny. Although large testes may be necessary to avoid sperm depletion in species in which males frequently engage in multi-pair copulations, we argue that selection has favoured increased testis mass in situations of more intense sperm competition in order to retaliate against copulations by rival males. The fact the males are not always successful in retaliating against rival ejaculates further suggests that females may largely control the allocation of paternity in birds and that increased sperm production by males may simply be a male strategy to make the best of a bad situation.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - psychology & cognitive sciences
  • 3 - behavioral science & comparative psychology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Animal Science and Zoology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - zoology
  • 1 - science ; 2 - ecology
  • 1 - science ; 2 - behavioral sciences
Identifiant ISTEX
A7C634187713B758918447D8320DB8287B8235D9
Revue

Behavioral Ecology and Sociobiology

Année de publication
1995
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.544
Sous-corpus
  • Oiseaux
Type de publication
Journal
ark:/67375/1BB-HW9WH19F-X
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