Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century
Fishery-dependent data are frequently used to inform management decisions. However, inferences about stock development based on commercial data such as Catch-Per-Unit-Effort (CPUE) can be severely biased due to a phenomenon known as technological creep, where fishing technology improves over time. H...
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ftpubmed:oai:pubmedcentral.nih.gov:8885706 2023-05-15T16:08:49+02:00 Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century Kleiven, Alf Ring Espeland, Sigurd Heiberg Stiansen, Stian Ono, Kotaro Zimmermann, Fabian Olsen, Esben Moland 2022-02-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8885706/ https://doi.org/10.1038/s41598-022-07293-2 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8885706/ http://dx.doi.org/10.1038/s41598-022-07293-2 © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Sci Rep Article Text 2022 ftpubmed https://doi.org/10.1038/s41598-022-07293-2 2022-03-06T02:00:48Z Fishery-dependent data are frequently used to inform management decisions. However, inferences about stock development based on commercial data such as Catch-Per-Unit-Effort (CPUE) can be severely biased due to a phenomenon known as technological creep, where fishing technology improves over time. Here we show how trap improvement over nine decades has driven technological creep in a European lobster (Homarus gammarus) fishery. We combined fishing data, experimental fishing with contemporary and older trap types, and information on depletion effects during fishing seasons. The resulting standardized CPUE time series indicates a 92% decline in lobster abundance between 1928 and 2019 compared to 70% if technological creep is not corrected for. Differences are most pronounced within the last 40 years when the most substantial shift in gear technology occurred: an uncorrected CPUE index suggests an 8% increase in lobster abundance during this period, while the corrected CPUE index declined by 57%. We conclude that technological creep has masked a continuous stock decline, particularly in recent decades and largely driven by the shift from one- to two-chambered traps, as well as the ability of newer trap designs to capture larger lobsters. Our study confirms the importance of adequate standardization, including technological development, when using fishery dependent CPUE for monitoring and management of data-limited fisheries. Text European lobster Homarus gammarus PubMed Central (PMC) Scientific Reports 12 1 |
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Article Kleiven, Alf Ring Espeland, Sigurd Heiberg Stiansen, Stian Ono, Kotaro Zimmermann, Fabian Olsen, Esben Moland Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
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Article |
description |
Fishery-dependent data are frequently used to inform management decisions. However, inferences about stock development based on commercial data such as Catch-Per-Unit-Effort (CPUE) can be severely biased due to a phenomenon known as technological creep, where fishing technology improves over time. Here we show how trap improvement over nine decades has driven technological creep in a European lobster (Homarus gammarus) fishery. We combined fishing data, experimental fishing with contemporary and older trap types, and information on depletion effects during fishing seasons. The resulting standardized CPUE time series indicates a 92% decline in lobster abundance between 1928 and 2019 compared to 70% if technological creep is not corrected for. Differences are most pronounced within the last 40 years when the most substantial shift in gear technology occurred: an uncorrected CPUE index suggests an 8% increase in lobster abundance during this period, while the corrected CPUE index declined by 57%. We conclude that technological creep has masked a continuous stock decline, particularly in recent decades and largely driven by the shift from one- to two-chambered traps, as well as the ability of newer trap designs to capture larger lobsters. Our study confirms the importance of adequate standardization, including technological development, when using fishery dependent CPUE for monitoring and management of data-limited fisheries. |
format |
Text |
author |
Kleiven, Alf Ring Espeland, Sigurd Heiberg Stiansen, Stian Ono, Kotaro Zimmermann, Fabian Olsen, Esben Moland |
author_facet |
Kleiven, Alf Ring Espeland, Sigurd Heiberg Stiansen, Stian Ono, Kotaro Zimmermann, Fabian Olsen, Esben Moland |
author_sort |
Kleiven, Alf Ring |
title |
Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
title_short |
Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
title_full |
Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
title_fullStr |
Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
title_full_unstemmed |
Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
title_sort |
technological creep masks continued decline in a lobster (homarus gammarus) fishery over a century |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8885706/ https://doi.org/10.1038/s41598-022-07293-2 |
genre |
European lobster Homarus gammarus |
genre_facet |
European lobster Homarus gammarus |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8885706/ http://dx.doi.org/10.1038/s41598-022-07293-2 |
op_rights |
© The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-022-07293-2 |
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Scientific Reports |
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12 |
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