Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution
The northern shrimp ( Pandalus borealis Krøyer) population in the Gulf of Maine collapsed during an extreme heatwave that occurred across the Northwest Atlantic Ocean in 2012. Northern shrimp is a boreal species, and reaches its southern limit in the Gulf of Maine. Here we investigate proximate caus...
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Online Access: | http://dx.doi.org/10.1371/journal.pone.0253914 https://dx.plos.org/10.1371/journal.pone.0253914 |
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crplos:10.1371/journal.pone.0253914 2024-10-06T13:51:32+00:00 Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution Richards, R. Anne Hunter, Margaret Belgrano, Andrea 2021 http://dx.doi.org/10.1371/journal.pone.0253914 https://dx.plos.org/10.1371/journal.pone.0253914 en eng Public Library of Science (PLoS) https://creativecommons.org/publicdomain/zero/1.0/ PLOS ONE volume 16, issue 7, page e0253914 ISSN 1932-6203 journal-article 2021 crplos https://doi.org/10.1371/journal.pone.0253914 2024-09-10T04:18:08Z The northern shrimp ( Pandalus borealis Krøyer) population in the Gulf of Maine collapsed during an extreme heatwave that occurred across the Northwest Atlantic Ocean in 2012. Northern shrimp is a boreal species, and reaches its southern limit in the Gulf of Maine. Here we investigate proximate causes for the population collapse using data from fishery-independent surveys, environmental monitoring, and the commercial fishery. We first examined spatial data to confirm that the decline in population estimates was not due to a major displacement of the population, and then tested hypotheses related to fishing mortality and shifts in predation pressure. Fishing mortality may have contributed but could not explain the magnitude of the decline or the disappearance of pre-exploitable size individuals. Stomach contents analysis and biomass trends revealed no new fish predators of shrimp. However, longfin squid ( Doryteuthis pealeii Lesueur) was unique among all species in showing time-series biomass peaks during spring, summer and fall of 2012, and spatial overlap with northern shrimp was unusually high in 2012. Longfin squid is a voracious and opportunistic predator that consumes crustaceans as well as fish. We hypothesize that the warmer temperatures of 2012 not only led to expansion of longfin squid distribution in Gulf of Maine, but had differential effects on migration phenology that further increased spatial overlap with northern shrimp. The weight of our evidence suggests that longfin squid predation was likely a significant factor in the collapse of northern shrimp in the Gulf of Maine. Article in Journal/Newspaper northern shrimp Northwest Atlantic Pandalus borealis PLOS PLOS ONE 16 7 e0253914 |
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English |
description |
The northern shrimp ( Pandalus borealis Krøyer) population in the Gulf of Maine collapsed during an extreme heatwave that occurred across the Northwest Atlantic Ocean in 2012. Northern shrimp is a boreal species, and reaches its southern limit in the Gulf of Maine. Here we investigate proximate causes for the population collapse using data from fishery-independent surveys, environmental monitoring, and the commercial fishery. We first examined spatial data to confirm that the decline in population estimates was not due to a major displacement of the population, and then tested hypotheses related to fishing mortality and shifts in predation pressure. Fishing mortality may have contributed but could not explain the magnitude of the decline or the disappearance of pre-exploitable size individuals. Stomach contents analysis and biomass trends revealed no new fish predators of shrimp. However, longfin squid ( Doryteuthis pealeii Lesueur) was unique among all species in showing time-series biomass peaks during spring, summer and fall of 2012, and spatial overlap with northern shrimp was unusually high in 2012. Longfin squid is a voracious and opportunistic predator that consumes crustaceans as well as fish. We hypothesize that the warmer temperatures of 2012 not only led to expansion of longfin squid distribution in Gulf of Maine, but had differential effects on migration phenology that further increased spatial overlap with northern shrimp. The weight of our evidence suggests that longfin squid predation was likely a significant factor in the collapse of northern shrimp in the Gulf of Maine. |
author2 |
Belgrano, Andrea |
format |
Article in Journal/Newspaper |
author |
Richards, R. Anne Hunter, Margaret |
spellingShingle |
Richards, R. Anne Hunter, Margaret Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
author_facet |
Richards, R. Anne Hunter, Margaret |
author_sort |
Richards, R. Anne |
title |
Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
title_short |
Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
title_full |
Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
title_fullStr |
Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
title_full_unstemmed |
Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
title_sort |
northern shrimp pandalus borealis population collapse linked to climate-driven shifts in predator distribution |
publisher |
Public Library of Science (PLoS) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1371/journal.pone.0253914 https://dx.plos.org/10.1371/journal.pone.0253914 |
genre |
northern shrimp Northwest Atlantic Pandalus borealis |
genre_facet |
northern shrimp Northwest Atlantic Pandalus borealis |
op_source |
PLOS ONE volume 16, issue 7, page e0253914 ISSN 1932-6203 |
op_rights |
https://creativecommons.org/publicdomain/zero/1.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0253914 |
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PLOS ONE |
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16 |
container_issue |
7 |
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e0253914 |
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1812179770000015360 |