Potential consequences of reproductive behaviour and mating system complexity on fishery-induced evolution ...
No abstracts are to be cited without prior reference to the author.Reproductive behaviour and mating system complexity may influence the rate of evolutionary change in exploited populations. Data on Atlantic cod (Gadus morhua) suggest that both sexes may prefer spawning with larger mates. In additio...
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| Format: | Conference Object |
| Language: | unknown |
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ASC 2006 - Theme session H
2024
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| Online Access: | https://dx.doi.org/10.17895/ices.pub.25258753 https://ices-library.figshare.com/articles/conference_contribution/Potential_consequences_of_reproductive_behaviour_and_mating_system_complexity_on_fishery-induced_evolution/25258753 |
| Summary: | No abstracts are to be cited without prior reference to the author.Reproductive behaviour and mating system complexity may influence the rate of evolutionary change in exploited populations. Data on Atlantic cod (Gadus morhua) suggest that both sexes may prefer spawning with larger mates. In addition to potential mate selection, fecundity selection might also favour late-, large-maturing genotypes, in contrast to the selection imposed by many fisheries. Estimates of evolutionary change in fished populations have tended to exclude the possibility that reproductive success is influenced by the trait(s) under fisheries-induced selection. Here, we simulate changes to the mean and variance in body size concomitant with increased fishing intensity. Then, based on empirical data from the laboratory, we compare selection differentials (S) for length under the assumptions that size does and does not affect reproductive success. We find that the rate of decline in S with increased fishing pressure depends on: (a) the ... |
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