Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century
Abstract 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 ove...
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ftdoajarticles:oai:doaj.org/article:a9bd9bc6db8e435097b8865cc7129f70 2023-05-15T16:08:49+02:00 Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century Alf Ring Kleiven Sigurd Heiberg Espeland Stian Stiansen Kotaro Ono Fabian Zimmermann Esben Moland Olsen 2022-02-01T00:00:00Z https://doi.org/10.1038/s41598-022-07293-2 https://doaj.org/article/a9bd9bc6db8e435097b8865cc7129f70 EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-07293-2 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-07293-2 2045-2322 https://doaj.org/article/a9bd9bc6db8e435097b8865cc7129f70 Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-07293-2 2022-12-31T15:32:06Z Abstract 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. Article in Journal/Newspaper European lobster Homarus gammarus Directory of Open Access Journals: DOAJ Articles Scientific Reports 12 1 |
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Medicine R Science Q |
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Medicine R Science Q Alf Ring Kleiven Sigurd Heiberg Espeland Stian Stiansen Kotaro Ono Fabian Zimmermann Esben Moland Olsen Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century |
topic_facet |
Medicine R Science Q |
description |
Abstract 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 |
Article in Journal/Newspaper |
author |
Alf Ring Kleiven Sigurd Heiberg Espeland Stian Stiansen Kotaro Ono Fabian Zimmermann Esben Moland Olsen |
author_facet |
Alf Ring Kleiven Sigurd Heiberg Espeland Stian Stiansen Kotaro Ono Fabian Zimmermann Esben Moland Olsen |
author_sort |
Alf Ring Kleiven |
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 Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-07293-2 https://doaj.org/article/a9bd9bc6db8e435097b8865cc7129f70 |
genre |
European lobster Homarus gammarus |
genre_facet |
European lobster Homarus gammarus |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-07293-2 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-07293-2 2045-2322 https://doaj.org/article/a9bd9bc6db8e435097b8865cc7129f70 |
op_doi |
https://doi.org/10.1038/s41598-022-07293-2 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
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1766404833000030208 |