Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate

Sara Hočevar, Jeffrey A. Hutchings, Anna Kuparinen

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

3 Citas (Scopus)

Resumen

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.

Idioma originalEnglish
Páginas (desde-hasta)20221172
Número de páginas1
PublicaciónProceedings of the Royal Society B: Biological Sciences
Volumen289
N.º1981
DOI
EstadoPublished - ago. 31 2022

ASJC Scopus Subject Areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Immunology and Microbiology
  • General Environmental Science
  • General Agricultural and Biological Sciences

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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Citar esto

Hočevar, S., Hutchings, J. A., & Kuparinen, A. (2022). Multiple-batch spawning: a risk-spreading strategy disarmed by highly intensive size-selective fishing rate. Proceedings of the Royal Society B: Biological Sciences, 289(1981), 20221172. https://doi.org/10.1098/rspb.2022.1172