Hundred-year decline of North Atlantic predatory fishes.
We estimate the biomass of high-trophic level fishes in the North Atlantic at a spatial scale of 0.5degrees latitude by 0.5degrees longitude based on 23 spatialized ecosystem models, each constructed to represent a given year or short period from 1880 to 1998. We extract over 7800 data points that d...
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ftuhipublicatio:oai:pure.atira.dk:publications/0f8e7e3b-813d-4398-8176-161e3d5571b7 2024-06-23T07:54:55+00:00 Hundred-year decline of North Atlantic predatory fishes. Christensen, Villy Guénette, Sylvie Heymans, Sheila Walters, C Watson, Reg Zeller, D Pauly, D 2003 https://pure.uhi.ac.uk/en/publications/0f8e7e3b-813d-4398-8176-161e3d5571b7 https://doi.org/10.1046/j.1467-2979.2003.00103.x eng eng https://pure.uhi.ac.uk/en/publications/0f8e7e3b-813d-4398-8176-161e3d5571b7 info:eu-repo/semantics/restrictedAccess Christensen , V , Guénette , S , Heymans , S , Walters , C , Watson , R , Zeller , D & Pauly , D 2003 , ' Hundred-year decline of North Atlantic predatory fishes. ' , Fish and Fisheries , no. 4 , pp. 1-24 . https://doi.org/10.1046/j.1467-2979.2003.00103.x RECRUITMENT EXPLOITED ECOSYSTEMS SEA CAPELIN MALLOTUS-VILLOSUS Fisheries TROPHIC CASCADES ECOSIM ECOSPACE article 2003 ftuhipublicatio https://doi.org/10.1046/j.1467-2979.2003.00103.x 2024-06-10T23:47:56Z We estimate the biomass of high-trophic level fishes in the North Atlantic at a spatial scale of 0.5degrees latitude by 0.5degrees longitude based on 23 spatialized ecosystem models, each constructed to represent a given year or short period from 1880 to 1998. We extract over 7800 data points that describe the abundance of high-trophic level fishes as a function of year, primary production, depth, temperature, latitude, ice cover and catch composition. We then use a multiple linear regression to predict the spatial abundance for all North Atlantic spatial cells for 1900 and for each year from 1950 to 1999. The results indicate that the biomass of high-trophic level fishes has declined by two-thirds during the last 50-year period, and with a factor of nine over the century Catches of high-trophic level fishes increased from 2.4 to 4.7 million tonnes annually in the late 1960s, And subsequently declined to below 2 million tonnes annually in the late 1990s. The fishing intensity for high-trophic level fishes tripled during the first half of the time period and remained high during the last half of the time period. Comparing the fishing intensity to similar measures from 35 assessments of high-trophic level fish populations from the North Atlantic, we conclude that the trends in the two data series are similar. Our results raise serious concern for the future of the North Atlantic as a diverse, healthy ecosystem; we may soon be left with only low-trophic level species in the sea. Article in Journal/Newspaper North Atlantic University of the Highlands and Islands: Research Database of UHI Fish and Fisheries 4 1 1 24 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
RECRUITMENT EXPLOITED ECOSYSTEMS SEA CAPELIN MALLOTUS-VILLOSUS Fisheries TROPHIC CASCADES ECOSIM ECOSPACE |
spellingShingle |
RECRUITMENT EXPLOITED ECOSYSTEMS SEA CAPELIN MALLOTUS-VILLOSUS Fisheries TROPHIC CASCADES ECOSIM ECOSPACE Christensen, Villy Guénette, Sylvie Heymans, Sheila Walters, C Watson, Reg Zeller, D Pauly, D Hundred-year decline of North Atlantic predatory fishes. |
topic_facet |
RECRUITMENT EXPLOITED ECOSYSTEMS SEA CAPELIN MALLOTUS-VILLOSUS Fisheries TROPHIC CASCADES ECOSIM ECOSPACE |
description |
We estimate the biomass of high-trophic level fishes in the North Atlantic at a spatial scale of 0.5degrees latitude by 0.5degrees longitude based on 23 spatialized ecosystem models, each constructed to represent a given year or short period from 1880 to 1998. We extract over 7800 data points that describe the abundance of high-trophic level fishes as a function of year, primary production, depth, temperature, latitude, ice cover and catch composition. We then use a multiple linear regression to predict the spatial abundance for all North Atlantic spatial cells for 1900 and for each year from 1950 to 1999. The results indicate that the biomass of high-trophic level fishes has declined by two-thirds during the last 50-year period, and with a factor of nine over the century Catches of high-trophic level fishes increased from 2.4 to 4.7 million tonnes annually in the late 1960s, And subsequently declined to below 2 million tonnes annually in the late 1990s. The fishing intensity for high-trophic level fishes tripled during the first half of the time period and remained high during the last half of the time period. Comparing the fishing intensity to similar measures from 35 assessments of high-trophic level fish populations from the North Atlantic, we conclude that the trends in the two data series are similar. Our results raise serious concern for the future of the North Atlantic as a diverse, healthy ecosystem; we may soon be left with only low-trophic level species in the sea. |
format |
Article in Journal/Newspaper |
author |
Christensen, Villy Guénette, Sylvie Heymans, Sheila Walters, C Watson, Reg Zeller, D Pauly, D |
author_facet |
Christensen, Villy Guénette, Sylvie Heymans, Sheila Walters, C Watson, Reg Zeller, D Pauly, D |
author_sort |
Christensen, Villy |
title |
Hundred-year decline of North Atlantic predatory fishes. |
title_short |
Hundred-year decline of North Atlantic predatory fishes. |
title_full |
Hundred-year decline of North Atlantic predatory fishes. |
title_fullStr |
Hundred-year decline of North Atlantic predatory fishes. |
title_full_unstemmed |
Hundred-year decline of North Atlantic predatory fishes. |
title_sort |
hundred-year decline of north atlantic predatory fishes. |
publishDate |
2003 |
url |
https://pure.uhi.ac.uk/en/publications/0f8e7e3b-813d-4398-8176-161e3d5571b7 https://doi.org/10.1046/j.1467-2979.2003.00103.x |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Christensen , V , Guénette , S , Heymans , S , Walters , C , Watson , R , Zeller , D & Pauly , D 2003 , ' Hundred-year decline of North Atlantic predatory fishes. ' , Fish and Fisheries , no. 4 , pp. 1-24 . https://doi.org/10.1046/j.1467-2979.2003.00103.x |
op_relation |
https://pure.uhi.ac.uk/en/publications/0f8e7e3b-813d-4398-8176-161e3d5571b7 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1046/j.1467-2979.2003.00103.x |
container_title |
Fish and Fisheries |
container_volume |
4 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
24 |
_version_ |
1802647254358556672 |