Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada
Abstract Spawning timing in fish is generally cyclical in temperate regions in order to increase the probability of matching larval occurrence with ideal environmental conditions. The capelin stock in Northwest Atlantic Fisheries Organization Divisions 2J3KL collapsed in 1990–1991 and has not recove...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsab144 http://academic.oup.com/icesjms/article-pdf/78/8/2709/40935136/fsab144.pdf |
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croxfordunivpr:10.1093/icesjms/fsab144 2024-06-23T07:54:44+00:00 Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada Murphy, Hannah M Adamack, Aaron T Cyr, Frédéric Hidalgo, Manuel 2021 http://dx.doi.org/10.1093/icesjms/fsab144 http://academic.oup.com/icesjms/article-pdf/78/8/2709/40935136/fsab144.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science volume 78, issue 8, page 2709-2723 ISSN 1054-3139 1095-9289 journal-article 2021 croxfordunivpr https://doi.org/10.1093/icesjms/fsab144 2024-06-11T04:17:25Z Abstract Spawning timing in fish is generally cyclical in temperate regions in order to increase the probability of matching larval occurrence with ideal environmental conditions. The capelin stock in Northwest Atlantic Fisheries Organization Divisions 2J3KL collapsed in 1990–1991 and has not recovered. This collapse was concomitant with collapses in groundfish stocks and cold oceanographic conditions. Using citizen science data, newspaper archives, grey and primary literature, and monitoring data, a century of capelin beach spawning times were compiled. Capelin beach spawning has been persistently 3 weeks later since the stock collapse. To identify potential predictors of capelin spawning timing, an exploratory analysis was conducted using environmental and biological variables and a period factor that categorized a year as either pre-collapse (1990 and earlier) or post-collapse (post-1990) in a step-wise multiple regression model. Spawning timing was predicted to be delayed in the post-collapse period when there were negative anomalies in the Newfoundland and Labrador Climate Index and summer (June–August) North Atlantic Oscillation, and when there was a decrease in mean length of the spawning population. The production of weak year-classes is predicted when spawning is delayed, suggesting that late spawning is severely inhibiting the recovery of the stock. Article in Journal/Newspaper Newfoundland North Atlantic North Atlantic oscillation Northwest Atlantic Oxford University Press Canada Newfoundland ICES Journal of Marine Science |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Spawning timing in fish is generally cyclical in temperate regions in order to increase the probability of matching larval occurrence with ideal environmental conditions. The capelin stock in Northwest Atlantic Fisheries Organization Divisions 2J3KL collapsed in 1990–1991 and has not recovered. This collapse was concomitant with collapses in groundfish stocks and cold oceanographic conditions. Using citizen science data, newspaper archives, grey and primary literature, and monitoring data, a century of capelin beach spawning times were compiled. Capelin beach spawning has been persistently 3 weeks later since the stock collapse. To identify potential predictors of capelin spawning timing, an exploratory analysis was conducted using environmental and biological variables and a period factor that categorized a year as either pre-collapse (1990 and earlier) or post-collapse (post-1990) in a step-wise multiple regression model. Spawning timing was predicted to be delayed in the post-collapse period when there were negative anomalies in the Newfoundland and Labrador Climate Index and summer (June–August) North Atlantic Oscillation, and when there was a decrease in mean length of the spawning population. The production of weak year-classes is predicted when spawning is delayed, suggesting that late spawning is severely inhibiting the recovery of the stock. |
author2 |
Hidalgo, Manuel |
format |
Article in Journal/Newspaper |
author |
Murphy, Hannah M Adamack, Aaron T Cyr, Frédéric |
spellingShingle |
Murphy, Hannah M Adamack, Aaron T Cyr, Frédéric Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
author_facet |
Murphy, Hannah M Adamack, Aaron T Cyr, Frédéric |
author_sort |
Murphy, Hannah M |
title |
Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
title_short |
Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
title_full |
Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
title_fullStr |
Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
title_full_unstemmed |
Identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in Newfoundland, Canada |
title_sort |
identifying possible drivers of the abrupt and persistent delay in capelin spawning timing following the 1991 stock collapse in newfoundland, canada |
publisher |
Oxford University Press (OUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1093/icesjms/fsab144 http://academic.oup.com/icesjms/article-pdf/78/8/2709/40935136/fsab144.pdf |
geographic |
Canada Newfoundland |
geographic_facet |
Canada Newfoundland |
genre |
Newfoundland North Atlantic North Atlantic oscillation Northwest Atlantic |
genre_facet |
Newfoundland North Atlantic North Atlantic oscillation Northwest Atlantic |
op_source |
ICES Journal of Marine Science volume 78, issue 8, page 2709-2723 ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsab144 |
container_title |
ICES Journal of Marine Science |
_version_ |
1802647001690537984 |