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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ftpubmed:oai:pubmedcentral.nih.gov:9428534 2023-05-15T15:27:35+02:00 Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate Hočevar, Sara Hutchings, Jeffrey A. Kuparinen, Anna 2022-08-31 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428534/ https://doi.org/10.1098/rspb.2022.1172 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428534/ http://dx.doi.org/10.1098/rspb.2022.1172 © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. CC-BY Proc Biol Sci Evolution Text 2022 ftpubmed https://doi.org/10.1098/rspb.2022.1172 2022-09-04T01:09:53Z 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. Text atlantic cod Gadus morhua PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 289 1981 |
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English |
topic |
Evolution |
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Evolution Hočevar, Sara Hutchings, Jeffrey A. Kuparinen, Anna Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate |
topic_facet |
Evolution |
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. |
format |
Text |
author |
Hočevar, Sara Hutchings, Jeffrey A. Kuparinen, Anna |
author_facet |
Hočevar, Sara Hutchings, Jeffrey A. 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 |
publisher |
The Royal Society |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428534/ https://doi.org/10.1098/rspb.2022.1172 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Proc Biol Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428534/ http://dx.doi.org/10.1098/rspb.2022.1172 |
op_rights |
© 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
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_ |
1766358010201899008 |