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

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Serval ID
serval:BIB_99BDCAE5EE96
Type
Article: article from journal or magazin.
Collection
Publications
Title
Male body size and breeding tubercles are both linked to intra-sexual dominance and reproductive success in the minnow
Journal
Animal Behaviour
Author(s)
Jacob A., Evanno G., Renai E., Sermier R., Wedekind C.
ISSN
0003-3472
Publication state
Published
Issued date
2009
Peer-reviewed
Oui
Volume
77
Number
4
Pages
823-829
Language
english
Abstract
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
Keywords
lek, male-male competition, minnow, perl organ, Phoxinus phoxinus, reproductive behaviour, secondary sexual character, sexual selection
Web of science
Open Access
Yes
Create date
01/12/2008 22:00
Last modification date
20/08/2019 16:01
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