Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate
Can the advantage of risk-managing life-history strategies become a disadvantage under human-induced evolution? Organisms have adapted to the variability and uncertainty of environmental conditions with a vast diversity of life-history strategies. One such evolved strategy is multiple-batch spawning...
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Online Access: | https://hdl.handle.net/11250/3027339 https://doi.org/10.1098/rspb.2022.1172 |
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ftimr:oai:imr.brage.unit.no:11250/3027339 2023-05-15T15:27:36+02:00 Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate Hočevar, Sara Hutchings, Jeffrey Kuparinen, Anna 2022 application/pdf https://hdl.handle.net/11250/3027339 https://doi.org/10.1098/rspb.2022.1172 eng eng EU/770884 Proceedings of the Royal Society of London. Biological Sciences. 2022, 289 (1981), . urn:issn:0962-8452 https://hdl.handle.net/11250/3027339 https://doi.org/10.1098/rspb.2022.1172 cristin:2060860 9 289 Proceedings of the Royal Society of London. Biological Sciences 1981 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1098/rspb.2022.1172 2022-10-26T22:42:26Z Can the advantage of risk-managing life-history strategies become a disadvantage under human-induced evolution? Organisms have adapted to the variability and uncertainty of environmental conditions with a vast diversity of life-history strategies. One such evolved strategy is multiple-batch spawning, a spawning strategy common to long-lived fishes that ‘hedge their bets' by distributing the risk to their offspring on a temporal and spatial scale. The fitness benefits of this spawning strategy increase with female body size, the very trait that size-selective fishing targets. By applying an empirically and theoretically motivated eco-evolutionary mechanistic model that was parameterized for Atlantic cod (Gadus morhua), we explored how fishing intensity may alter the life-history traits and fitness of fishes that are multiple-batch spawners. Our main findings are twofold; first, the risk-spreading strategy of multiple-batch spawning is not effective against fisheries selection, because the fisheries selection favours smaller fish with a lower risk-spreading effect; and second, the ecological recovery in population size does not secure evolutionary recovery in the population size structure. The beneficial risk-spreading mechanism of the batch spawning strategy highlights the importance of recovery in the size structure of overfished stocks, from which a full recovery in the population size can follow. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua Institute for Marine Research: Brage IMR Proceedings of the Royal Society B: Biological Sciences 289 1981 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
Can the advantage of risk-managing life-history strategies become a disadvantage under human-induced evolution? Organisms have adapted to the variability and uncertainty of environmental conditions with a vast diversity of life-history strategies. One such evolved strategy is multiple-batch spawning, a spawning strategy common to long-lived fishes that ‘hedge their bets' by distributing the risk to their offspring on a temporal and spatial scale. The fitness benefits of this spawning strategy increase with female body size, the very trait that size-selective fishing targets. By applying an empirically and theoretically motivated eco-evolutionary mechanistic model that was parameterized for Atlantic cod (Gadus morhua), we explored how fishing intensity may alter the life-history traits and fitness of fishes that are multiple-batch spawners. Our main findings are twofold; first, the risk-spreading strategy of multiple-batch spawning is not effective against fisheries selection, because the fisheries selection favours smaller fish with a lower risk-spreading effect; and second, the ecological recovery in population size does not secure evolutionary recovery in the population size structure. The beneficial risk-spreading mechanism of the batch spawning strategy highlights the importance of recovery in the size structure of overfished stocks, from which a full recovery in the population size can follow. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hočevar, Sara Hutchings, Jeffrey Kuparinen, Anna |
spellingShingle |
Hočevar, Sara Hutchings, Jeffrey Kuparinen, Anna Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
author_facet |
Hočevar, Sara Hutchings, Jeffrey Kuparinen, Anna |
author_sort |
Hočevar, Sara |
title |
Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
title_short |
Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
title_full |
Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
title_fullStr |
Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
title_full_unstemmed |
Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
title_sort |
multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3027339 https://doi.org/10.1098/rspb.2022.1172 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
9 289 Proceedings of the Royal Society of London. Biological Sciences 1981 |
op_relation |
EU/770884 Proceedings of the Royal Society of London. Biological Sciences. 2022, 289 (1981), . urn:issn:0962-8452 https://hdl.handle.net/11250/3027339 https://doi.org/10.1098/rspb.2022.1172 cristin:2060860 |
op_doi |
https://doi.org/10.1098/rspb.2022.1172 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
289 |
container_issue |
1981 |
_version_ |
1766358016077070336 |