Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach
Abstract The global decline of albatrosses (Diomedidae: Procellariiformes) is thought to have occurred largely as a direct result of fishery‐related mortality. Albatrosses and other large petrels interact with fisheries in several ways, including scavenging used bait and discarded offal, which may c...
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crwiley:10.1002/aqc.1136 2024-06-02T08:04:27+00:00 Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach Ridley, Cindy Harrison, Nancy M. Phillips, R. A. Pugh, P. J. A. 2010 http://dx.doi.org/10.1002/aqc.1136 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Faqc.1136 https://onlinelibrary.wiley.com/doi/pdf/10.1002/aqc.1136 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Aquatic Conservation: Marine and Freshwater Ecosystems volume 20, issue 6, page 621-631 ISSN 1052-7613 1099-0755 journal-article 2010 crwiley https://doi.org/10.1002/aqc.1136 2024-05-03T11:37:36Z Abstract The global decline of albatrosses (Diomedidae: Procellariiformes) is thought to have occurred largely as a direct result of fishery‐related mortality. Albatrosses and other large petrels interact with fisheries in several ways, including scavenging used bait and discarded offal, which may contain hooks. Hooks that are ingested by breeding birds are often fed to chicks which subsequently regurgitate them shortly before fledging. In this study a series of mathematical (cladistic, cluster and principal components) analyses are applied to a sample of 241 items of fishing gear (hook, snood and hook/snood unit) collected from seabird nest sites on Bird Island, South Georgia, and 44 reference gear items provided by four South Atlantic regional fisheries. The five separate analyses failed to assign most gear to a particular fishery or to identify any consistent annual trends. The homogeneous nature of the material, which was largely derived from the same manufacturers, meant that gear origin could not be determined. This suggests that hooks found at seabird colonies in this, and potentially other regions, will be of limited use in identifying offending fisheries, unless operators are obliged to deploy gear with unique marks in the future. Nevertheless, it is suggested that this approach should work effectively where birds interact with a range of fisheries targeting different species using variable gear. This study therefore represents an innovative approach to the characterization of lost fishing gear with potentially widespread application. Copyright © 2010 John Wiley & Sons, Ltd. Article in Journal/Newspaper Bird Island Wiley Online Library Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Aquatic Conservation: Marine and Freshwater Ecosystems 20 6 621 631 |
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Wiley Online Library |
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English |
description |
Abstract The global decline of albatrosses (Diomedidae: Procellariiformes) is thought to have occurred largely as a direct result of fishery‐related mortality. Albatrosses and other large petrels interact with fisheries in several ways, including scavenging used bait and discarded offal, which may contain hooks. Hooks that are ingested by breeding birds are often fed to chicks which subsequently regurgitate them shortly before fledging. In this study a series of mathematical (cladistic, cluster and principal components) analyses are applied to a sample of 241 items of fishing gear (hook, snood and hook/snood unit) collected from seabird nest sites on Bird Island, South Georgia, and 44 reference gear items provided by four South Atlantic regional fisheries. The five separate analyses failed to assign most gear to a particular fishery or to identify any consistent annual trends. The homogeneous nature of the material, which was largely derived from the same manufacturers, meant that gear origin could not be determined. This suggests that hooks found at seabird colonies in this, and potentially other regions, will be of limited use in identifying offending fisheries, unless operators are obliged to deploy gear with unique marks in the future. Nevertheless, it is suggested that this approach should work effectively where birds interact with a range of fisheries targeting different species using variable gear. This study therefore represents an innovative approach to the characterization of lost fishing gear with potentially widespread application. Copyright © 2010 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Ridley, Cindy Harrison, Nancy M. Phillips, R. A. Pugh, P. J. A. |
spellingShingle |
Ridley, Cindy Harrison, Nancy M. Phillips, R. A. Pugh, P. J. A. Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
author_facet |
Ridley, Cindy Harrison, Nancy M. Phillips, R. A. Pugh, P. J. A. |
author_sort |
Ridley, Cindy |
title |
Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
title_short |
Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
title_full |
Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
title_fullStr |
Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
title_full_unstemmed |
Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
title_sort |
identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/aqc.1136 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Faqc.1136 https://onlinelibrary.wiley.com/doi/pdf/10.1002/aqc.1136 |
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ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
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Bird Island |
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Bird Island |
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Bird Island |
genre_facet |
Bird Island |
op_source |
Aquatic Conservation: Marine and Freshwater Ecosystems volume 20, issue 6, page 621-631 ISSN 1052-7613 1099-0755 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/aqc.1136 |
container_title |
Aquatic Conservation: Marine and Freshwater Ecosystems |
container_volume |
20 |
container_issue |
6 |
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621 |
op_container_end_page |
631 |
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1800749076200816640 |