Fishing, predation, and temperature drive herring decline in a large marine ecosystem
Abstract 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 old...
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crwiley:10.1002/ece3.8411 2024-06-02T08:03:12+00:00 Fishing, predation, and temperature drive herring decline in a large marine ecosystem Boyce, Daniel G. Petrie, Brian Frank, Kenneth T. 2021 http://dx.doi.org/10.1002/ece3.8411 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.8411 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.8411 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 11, issue 24, page 18136-18150 ISSN 2045-7758 2045-7758 journal-article 2021 crwiley https://doi.org/10.1002/ece3.8411 2024-05-03T11:01:48Z Abstract 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. Article in Journal/Newspaper atlantic cod Wiley Online Library Canada Ecology and Evolution 11 24 18136 18150 |
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English |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Boyce, Daniel G. Petrie, Brian Frank, Kenneth T. |
spellingShingle |
Boyce, Daniel G. Petrie, Brian Frank, Kenneth T. Fishing, predation, and temperature drive herring decline in a large marine ecosystem |
author_facet |
Boyce, Daniel G. Petrie, Brian Frank, Kenneth T. |
author_sort |
Boyce, Daniel G. |
title |
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_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_sort |
fishing, predation, and temperature drive herring decline in a large marine ecosystem |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/ece3.8411 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.8411 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.8411 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
Ecology and Evolution volume 11, issue 24, page 18136-18150 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.8411 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
24 |
container_start_page |
18136 |
op_container_end_page |
18150 |
_version_ |
1800747681959641088 |