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Fishing, predation, and temperature drive herring decline in a large marine ecosystem

Since 1960, landings of Atlantic herring have been the greatest of any marine species in Canada, surpassing Atlantic cod and accounting for 24% of the total seafood harvested in Atlantic Canada. The Scotian Shelf‐Bay of Fundy herring fisheries (NAFO Division 4VWX) is among Canada's oldest and d...

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Autores principales: Boyce, Daniel G., Petrie, Brian, Frank, Kenneth T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717267/
https://www.ncbi.nlm.nih.gov/pubmed/35003663
http://dx.doi.org/10.1002/ece3.8411
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author Boyce, Daniel G.
Petrie, Brian
Frank, Kenneth T.
author_facet Boyce, Daniel G.
Petrie, Brian
Frank, Kenneth T.
author_sort Boyce, Daniel G.
collection PubMed
description Since 1960, landings of Atlantic herring have been the greatest of any marine species in Canada, surpassing Atlantic cod and accounting for 24% of the total seafood harvested in Atlantic Canada. The Scotian Shelf‐Bay of Fundy herring fisheries (NAFO Division 4VWX) is among Canada's oldest and drives this productivity, accounting for up to 75% of the total herring catch in some years. The stocks’ productivity and overall health have declined since 1965. Despite management measures to promote recovery implemented since 2003, biomass remains low and is declining. The factors that drive the productivity of 4VWX herring are primarily unresolved, likely impeding the effectiveness of management actions on this stock. We evaluated potential drivers of herring variability by analyzing 52 time‐series that describe the temporal and spatial evolution of the 4VWX herring population and the physical, ecological, and anthropogenic factors that could affect them using structural equation models. Variation in herring biomass was best accounted for by the exploitation rate's negative effect and the geographic distribution of fishing and recruitment. Thermal phenology and temperature adversely and egg predation positively impacted the early life stage mortality rate and, ultimately, adult biomass. These findings are broadly relevant to fisheries management, but particularly for 4VWX herring, where the current management approach does not consider their early life stage dynamics or assess them within the ecosystem or climate change contexts.
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spelling pubmed-87172672022-01-06 Fishing, predation, and temperature drive herring decline in a large marine ecosystem Boyce, Daniel G. Petrie, Brian Frank, Kenneth T. Ecol Evol Research Articles Since 1960, landings of Atlantic herring have been the greatest of any marine species in Canada, surpassing Atlantic cod and accounting for 24% of the total seafood harvested in Atlantic Canada. The Scotian Shelf‐Bay of Fundy herring fisheries (NAFO Division 4VWX) is among Canada's oldest and drives this productivity, accounting for up to 75% of the total herring catch in some years. The stocks’ productivity and overall health have declined since 1965. Despite management measures to promote recovery implemented since 2003, biomass remains low and is declining. The factors that drive the productivity of 4VWX herring are primarily unresolved, likely impeding the effectiveness of management actions on this stock. We evaluated potential drivers of herring variability by analyzing 52 time‐series that describe the temporal and spatial evolution of the 4VWX herring population and the physical, ecological, and anthropogenic factors that could affect them using structural equation models. Variation in herring biomass was best accounted for by the exploitation rate's negative effect and the geographic distribution of fishing and recruitment. Thermal phenology and temperature adversely and egg predation positively impacted the early life stage mortality rate and, ultimately, adult biomass. These findings are broadly relevant to fisheries management, but particularly for 4VWX herring, where the current management approach does not consider their early life stage dynamics or assess them within the ecosystem or climate change contexts. John Wiley and Sons Inc. 2021-12-14 /pmc/articles/PMC8717267/ /pubmed/35003663 http://dx.doi.org/10.1002/ece3.8411 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Boyce, Daniel G.
Petrie, Brian
Frank, Kenneth T.
Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title_full Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title_fullStr Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title_full_unstemmed Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title_short Fishing, predation, and temperature drive herring decline in a large marine ecosystem
title_sort fishing, predation, and temperature drive herring decline in a large marine ecosystem
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717267/
https://www.ncbi.nlm.nih.gov/pubmed/35003663
http://dx.doi.org/10.1002/ece3.8411
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