Gonadal alterations in male whitefish Coregonus fatioi: no evidence for genetic damage reducing viability in early life stages.

Détails

ID Serval
serval:BIB_9E3AEC06F122
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Gonadal alterations in male whitefish Coregonus fatioi: no evidence for genetic damage reducing viability in early life stages.
Périodique
Diseases of Aquatic Organisms
Auteur(s)
Urbach D., Britschgi A., Jacob A., Bittner D., Bernet D., Wahli T., Yoccoz N.G., Wedekind C.
ISSN
0177-5103[print], 0177-5103[linking]
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
81
Numéro
2
Pages
119-125
Langue
anglais
Résumé
In recent years, numerous cases of morphological gonadal alterations in fish have been recorded throughout the world and across a wide range of species. In the whitefish Coregonus fatioi from the pre-alpine Lake Thun (Switzerland), the frequency of gonadal alterations is particularly high and the variety of alteration types large. Little is known about the proximal causes and the direct consequences of these morphological features on population persistence. In particular, the potential for the observed alterations to be the phenotypic expression of reduced genetic quality has not yet been addressed. In this study, we used offspring survival during embryogenesis as a proximate indicator of male genetic quality and tested whether the presence of gonadal alterations in males is an indicator of reduced quality. Embryos resulted from in vitro fertilizations of gametes from 126 males and females. We found no significant correlation between embryo survival and gonadal alteration in adults. Our findings suggest that in C. fatioi of Lake Thun, alterations in gonad morphology are not a phenotypic expression of variation in genetic quality.
Mots-clé
Animals, Congenital Abnormalities/epidemiology, Congenital Abnormalities/veterinary, Embryo, Nonmammalian, Female, Fish Diseases/epidemiology, Fish Diseases/pathology, Fresh Water, Gonads/abnormalities, Hermaphroditism/pathology, Hermaphroditism/veterinary, Male, Salmonidae/abnormalities, Salmonidae/genetics, Switzerland/epidemiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
16/06/2008 14:11
Dernière modification de la notice
20/08/2019 16:04
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