Inter-population ovarian fluid variation differentially modulates sperm motility in Atlantic cod Gadus morhua. | - CCMAR -

Journal Article

TitleInter-population ovarian fluid variation differentially modulates sperm motility in Atlantic cod Gadus morhua.
Publication TypeJournal Article
AuthorsBeirão, J, Purchase, CF, Wringe, BF, Fleming, IA
Year of Publication2015
JournalJ Fish Biol
Volume87
Issue1
Date Published2015 Jul
Pagination54-68
ISSN1095-8649
KeywordsAnimals, Body Fluids, Female, Gadus morhua, Male, Ovary, Reproductive Isolation, Sperm Motility
Abstract

This study tested the hypothesis that the effects of Atlantic cod Gadus morhua ovarian fluid on sperm motility variables are population specific. Sperm from a northern G. morhua population were activated in the presence of ovarian fluid from either northern or southern G. morhua at different concentrations. Ovarian fluid acted as a filter, in some cases reducing sperm swimming performance compared with seawater. Fluid from females foreign in population (southern) to the males (northern) had a greater inhibiting effect than those from the native population. Follow-up analysis indicated that the ovarian fluids had lower Ca(2+) concentration in northern than southern G. morhua, which could be the causative mechanism. If widespread, such cryptic female choice could reduce the incidence of intraspecific hybridization among diverged populations and contribute to reproductive isolation.

DOI10.1111/jfb.12685
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/25919195?dopt=Abstract

Alternate JournalJ. Fish Biol.
PubMed ID25919195
CCMAR Authors