Male reproductive competition in spawning aggregations of cod (Gadus morhua, L.)
@article{Bekkevold2002MaleRC, title={Male reproductive competition in spawning aggregations of cod (Gadus morhua, L.)}, author={Dorte Bekkevold and Michael M{\o}ller Hansen and Volker Loeschcke}, journal={Molecular Ecology}, year={2002}, volume={11} }
Reproductive competition may lead to a large skew in reproductive success among individuals. Very few studies have analysed the paternity contribution of individual males in spawning aggregations of fish species with huge census population sizes. We quantified the variance in male reproductive success in spawning aggregations of cod under experimental conditions over an entire spawning season. Male reproductive success was estimated by microsatellite‐based parentage analysis of offspring…
147 Citations
Morphological and behavioural correlates of reproductive success in Atlantic cod Gadus morhua
- Environmental Science, Biology
- 2008
Observations are consistent with the hypotheses that some form of intrasexual competition or mate choice is a constituent of the mating system of this species and that the ratio of effective to census population size in broadcast-spawning marine fishes is very small.
Mating competition between farmed and wild cod Gadus morhua.
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- 2010
It is suggested that hybridisation between farmed escapees and wild cod is likely and that farmed cod may interfere with the natural spawning behaviour of cod, and female choice appears to be an integral part of the cod mating system.
Spawning success of cultured and wild male Atlantic cod Gadus morhua does not differ during paired contests
- Environmental Science, Biology
- 2015
This is the first study to detect spawning success equality between wild and cultured male cod in competition, and the courting behaviour of the cultured males was found to increase their success.
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- Environmental Science, BiologyEnvironmental Biology of Fishes
- 2010
It is hypothesized that energetic costs associated with reproduction, potentially mediated by sperm depletion in dominant individuals, may be responsible for temporal shifts in mating behaviour and reproductive success of male Atlantic Cod.
Competitive spawning success and fertility of triploid male Atlantic cod Gadus morhua
- Environmental Science, Biology
- 2010
Diagnostic characteristics of aneuploidy suggest that although farmed triploid male cod may compete successfully with wild diploids for spawning access to wild females, their offspring will not survive.
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod (Gadus morhua)
- Environmental Science
- 2007
These observations are consistent with the hypothesis that some form of intrasexual competition or mate choice is a constituent of the mating system of this species and that this can have an important influence on individual fitness.
Parentage Determination and Effective Population Size Estimation in Mass Spawning Pacific Oyster, Crassostrea gigas, Based on Microsatellite Analysis
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- 2009
Seven high polymorphic microsatellite loci were used to determine the pedigrees in a mass spawning of Pacific oyster, Crassostrea gigas, and to estimate the genetic variability between broodstock and offspring, finding the higher inbreeding and lower effective population size should be considered.
Effects of relatedness and inbreeding on reproductive success of Nile tilapia (Oreochromis niloticus)
- Biology
- 2009
Do cod form spawning leks? Evidence from a Newfoundland spawning ground
- Environmental Science
- 2006
Results add support to the hypothesis that cod employ a lekking mating system by indicating that both males and females were highly mobile while present on the spawning ground.
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