Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management
Abstract Large‐scale commercial harvesting and climate‐induced fluctuations in ocean properties shape the dynamics of marine populations as interdependent drivers at varied timescales. Persistent selective removals of larger, older members of a population can distort its demographic structure, erodi...
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crwiley:10.1111/gcb.16922 2024-06-02T08:11:58+00:00 Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management Goto, Daisuke Havforskningsinstituttet 2023 http://dx.doi.org/10.1111/gcb.16922 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16922 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 29, issue 21, page 6018-6039 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.16922 2024-05-03T11:01:24Z Abstract Large‐scale commercial harvesting and climate‐induced fluctuations in ocean properties shape the dynamics of marine populations as interdependent drivers at varied timescales. Persistent selective removals of larger, older members of a population can distort its demographic structure, eroding resilience to fluctuations in habitat conditions and thus amplifying volatility in transient dynamics. Many historically depleted marine fish stocks have begun showing signs of recovery in recent decades following the implementation of stricter management measures. But these interventions coincide with accelerated changes in the oceans triggered by increasingly warmer, more variable climates. Applying multilevel models to annual estimates of demographic metrics of 38 stocks comprising 11 species across seven northeast Atlantic ecoregions, this study explores how time‐varying local and regional climates contributed to the transient dynamics of recovering populations exposed to variable fishing pressures moderated by management actions. Analyses reveal that progressive reductions in fishing pressure and shifting climate conditions discontinuously shaped rebuilding patterns of the stocks through restorations of maternal demographic structure (reversing age truncation) and reproductive capacity. As the survival rate and demographic structure of reproductive fish improved, transient growth became less sensitive to variability in recruitment and juvenile survival and more to that in adult survival. As the biomass of reproductive fish rose, recruitment success also became increasingly regulated by density‐dependent processes involving higher numbers of older fish. When reductions in fishing pressure were insufficient or delayed, however, stocks became further depleted, with more eroded demographic structures. Although warmer local climates in spawning seasons promoted recruitment success in some ecoregions, changing climates in recent decades began adversely affecting reproductive performances overall, amplifying ... Article in Journal/Newspaper Northeast Atlantic Wiley Online Library Global Change Biology 29 21 6018 6039 |
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Abstract Large‐scale commercial harvesting and climate‐induced fluctuations in ocean properties shape the dynamics of marine populations as interdependent drivers at varied timescales. Persistent selective removals of larger, older members of a population can distort its demographic structure, eroding resilience to fluctuations in habitat conditions and thus amplifying volatility in transient dynamics. Many historically depleted marine fish stocks have begun showing signs of recovery in recent decades following the implementation of stricter management measures. But these interventions coincide with accelerated changes in the oceans triggered by increasingly warmer, more variable climates. Applying multilevel models to annual estimates of demographic metrics of 38 stocks comprising 11 species across seven northeast Atlantic ecoregions, this study explores how time‐varying local and regional climates contributed to the transient dynamics of recovering populations exposed to variable fishing pressures moderated by management actions. Analyses reveal that progressive reductions in fishing pressure and shifting climate conditions discontinuously shaped rebuilding patterns of the stocks through restorations of maternal demographic structure (reversing age truncation) and reproductive capacity. As the survival rate and demographic structure of reproductive fish improved, transient growth became less sensitive to variability in recruitment and juvenile survival and more to that in adult survival. As the biomass of reproductive fish rose, recruitment success also became increasingly regulated by density‐dependent processes involving higher numbers of older fish. When reductions in fishing pressure were insufficient or delayed, however, stocks became further depleted, with more eroded demographic structures. Although warmer local climates in spawning seasons promoted recruitment success in some ecoregions, changing climates in recent decades began adversely affecting reproductive performances overall, amplifying ... |
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Havforskningsinstituttet |
format |
Article in Journal/Newspaper |
author |
Goto, Daisuke |
spellingShingle |
Goto, Daisuke Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
author_facet |
Goto, Daisuke |
author_sort |
Goto, Daisuke |
title |
Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
title_short |
Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
title_full |
Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
title_fullStr |
Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
title_full_unstemmed |
Transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
title_sort |
transient demographic dynamics of recovering fish populations shaped by past climate variability, harvest, and management |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.16922 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16922 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Global Change Biology volume 29, issue 21, page 6018-6039 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.16922 |
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Global Change Biology |
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29 |
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21 |
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6018 |
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6039 |
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