Male body size and breeding tubercles are both linked to intra-sexual dominance and reproductive success in the minnow

Détails

Ressource 1Télécharger: 000264325300008postscript.pdf (3943.23 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_99BDCAE5EE96
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Male body size and breeding tubercles are both linked to intra-sexual dominance and reproductive success in the minnow
Périodique
Animal Behaviour
Auteur(s)
Jacob A., Evanno G., Renai E., Sermier R., Wedekind C.
ISSN
0003-3472
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
77
Numéro
4
Pages
823-829
Langue
anglais
Résumé
Male dominance hierarchies are usually linked to relative body size and to weapon size, that is, to determinants of fighting ability. Secondary sexual characters that are not directly used as weapons could still be linked to dominance if they reveal determination or overall health and vigour and hence, indirectly, fighting ability. We studied the mating behaviour of the minnow, Phoxinus phoxinus, a cyprinid fish in which males develop breeding tubercles during the spawning season. The function of these breeding tubercles is still not clear. Using microsatellite markers, we determined male reproductive success under controlled conditions. The minnows were territorial and quickly established a dominance hierarchy at the beginning of the spawning season. Dominance was strongly and positively linked to fertilization success. Although body size and number of breeding tubercles were not significantly correlated in our sample, both large males and males with many breeding tubercles were more dominant and achieved higher fertilization success than small males or males with few tubercles. We found multimale fertilization in most clutches, suggesting that sperm competition is important in this species. Females showed behaviour that may be linked to spawning decision, that is, male dominance might not be the only determinant of male reproductive success in minnows
Mots-clé
lek, male-male competition, minnow, perl organ, Phoxinus phoxinus, reproductive behaviour, secondary sexual character, sexual selection
Web of science
Open Access
Oui
Création de la notice
01/12/2008 22:00
Dernière modification de la notice
08/05/2019 22:32
Données d'usage