Combined effects of exploitation and environmental change on life history: a comparative analysis on Atlantic herring

Manuelle Beaudry-Sylvestre; Hugues P. Benoit; Jeffrey A. Hutchings

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Combined effects of exploitation and environmental change on life history: a comparative analysis on Atlantic herring

机译：Combined effects of exploitation and environmental change on life history: a comparative analysis on Atlantic herring

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The consequences of fisheries-induced evolution on stock productivity and yield depend, to a large extent, on the general prospects for growthand survival. Here, we compare the selection pressures imposed by two distinct patterns of exploitation—principally targeting spawning or nonspawningaggregations—on age at maturity among 15 Canadian stocks of Atlantic herring (Clupea harengus) that have exhibited a consistentpattern of length-at-age responses to common large-scale environmental drivers since the 1960s. In accordance with expectations for maturitydependentharvesting, the establishment of a spawner-targeted fishery in the southern Gulf of St. Lawrence coincided with a shift towardsdelayed maturity in both resident stocks, whereas stocks elsewhere subject to fisheries that also exploited juveniles more commonly exhibitedtrends towards earlier maturity. Despite these differences, we find that environmentally driven changes in length at maturation, combined withtotal mortality, may overwhelmingly determine lifetime reproductive success and possibly fitness. By linking phenotypic changes experiencedin the juvenile period to simple correlates of egg production in mature age classes, our study highlights the importance of managing fisheries inthe context of ubiquitous but contrasting environmental constraints on life histories.

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《ICES journal of marine science: International Council for the Exploration of the Sea journal of marine science》 |2022年第10期|2728-2740|共13页
作者
Manuelle Beaudry-Sylvestre; Hugues P. Benoit; Jeffrey A. Hutchings;
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Maurice Lamontagne Institute, Fisheries and Oceans, 850 Route de la Mer, Mont Joli QC G5H 3Z4, Canada;

Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax NS B3H 4R2, Canada Institute of Marine Research, Fl?devigen Marine Research Station, N-4817 His, Norway Centre for Coastal Research, University of Agder, N-4604 Kristiansand, Norway;

Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax NS B3H 4R2, Canada Maurice Lamontagne Institute, Fisheries and Oceans, 850 Route de la Mer, Mont Joli QC G5H 3Z4, Canada;

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正文语种英语
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density-dependence; evolutionarily optimal harvesting strategy; maturity ogive; minimum landing size; probabilistic maturation reaction norm; von Bertalanffy;

Combined effects of exploitation and environmental change on life history: a comparative analysis on Atlantic herring

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