Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018
<p>A new dataset on the diet of Atlantic cod in the Barents Sea from the 1930s to the present day has been compiled to produce one of the largest fish diet datasets available globally. Atlantic cod is one of the most ecologically and commercially important fish species in the North Atlantic. T...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-03-01
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| Series: | Earth System Science Data |
| Online Access: | https://essd.copernicus.org/articles/13/1361/2021/essd-13-1361-2021.pdf |
| _version_ | 1818582761525477376 |
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| author | B. L. Townhill R. E. Holt B. Bogstad J. M. Durant J. K. Pinnegar J. K. Pinnegar A. V. Dolgov A. V. Dolgov A. V. Dolgov N. A. Yaragina E. Johannesen G. Ottersen G. Ottersen |
| author_facet | B. L. Townhill R. E. Holt B. Bogstad J. M. Durant J. K. Pinnegar J. K. Pinnegar A. V. Dolgov A. V. Dolgov A. V. Dolgov N. A. Yaragina E. Johannesen G. Ottersen G. Ottersen |
| author_sort | B. L. Townhill |
| collection | DOAJ |
| description | <p>A new dataset on the diet of Atlantic cod in the Barents Sea from the 1930s
to the present day has been compiled to produce one of the largest fish
diet datasets available globally. Atlantic cod is one of the most
ecologically and commercially important fish species in the North Atlantic.
The stock in the Barents Sea is by far the largest, as a result of both
successful management and favourable environmental conditions since the
early 2000s. As a top predator, cod plays a key role in the Barents Sea
ecosystem. The species has a broad diet consisting mainly of crustaceans and
teleost fish, and both the amount and type of prey vary in space and time.
The data – from Russia, Norway and the United Kingdom – represent
quantitative stomach content records from more than 400 000 fish and
qualitative data from 2.5 million fish. Many of the data are from joint
collaborative surveys between Norway and Russia. The sampling was conducted
throughout each year, allowing for seasonal, annual and decadal comparisons
to be made. Visual analysis shows cod diets have changed considerably from
the start of the dataset in the 1930s to the present day. There was a large
proportion of herring in the diets in the 1930s, whereas in more recent
decades capelin, invertebrates and other fish dominate. There are also
significant interannual asynchronous fluctuations in prey, particularly
capelin and euphausiids. Combining these datasets can help us understand how
the environment and ecosystems are responding to climatic changes, and what
influences the diet and prey switching of cod. Trends in temperature and
variability indices can be tested against the occurrence of different prey
items, and the effects of fishing pressure on cod and prey stocks on diet
composition could be investigated. The dataset will also enable us to
improve parametrization of food web models and to forecast how Barents Sea
fisheries may respond in the future to management and to climate change.
The Russian data are available through joint projects with the Polar Branch of
the Russian Federal Research Institute of Fisheries and Oceanography (VNIRO). The UK and Norwegian data (Townhill et al., 2020) are being released
with this paper at <a href="https://doi.org/10.21335/NMDC-2139169383">https://doi.org/10.21335/NMDC-2139169383</a>.</p> |
| first_indexed | 2024-12-16T07:54:31Z |
| format | Article |
| id | doaj.art-2be20462878240a7afb600370e7ecbdb |
| institution | Directory Open Access Journal |
| issn | 1866-3508 1866-3516 |
| language | English |
| last_indexed | 2024-12-16T07:54:31Z |
| publishDate | 2021-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth System Science Data |
| spelling | doaj.art-2be20462878240a7afb600370e7ecbdb2022-12-21T22:38:46ZengCopernicus PublicationsEarth System Science Data1866-35081866-35162021-03-01131361137010.5194/essd-13-1361-2021Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018B. L. Townhill0R. E. Holt1B. Bogstad2J. M. Durant3J. K. Pinnegar4J. K. Pinnegar5A. V. Dolgov6A. V. Dolgov7A. V. Dolgov8N. A. Yaragina9E. Johannesen10G. Ottersen11G. Ottersen12Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft, Suffolk, NR33 0HT, UKCentre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0316 Oslo, NorwayInstitute of Marine Research, P.O. Box 1870 Nordnes, 5817 Bergen, NorwayCentre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0316 Oslo, NorwayCentre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft, Suffolk, NR33 0HT, UKCollaborative Centre for Sustainable Use of the Seas (CCSUS), University of East Anglia, Norwich, NR4 TJ, UKPolar Branch of the Federal State Budget Scientific Institution “Russian Federal Research Institute of Fisheries and Oceanography” (VNIRO, formerly PINRO), 6, Academician Knipovich Street, Murmansk 183038, RussiaFederal State Educational Institution of Higher Education “Murmansk State Technical University”, 13, Sportivnaya Street, Murmansk, 183010, RussiaTomsk State University, 36, Lenin Avenue, 634050 Tomsk, RussiaPolar Branch of the Federal State Budget Scientific Institution “Russian Federal Research Institute of Fisheries and Oceanography” (VNIRO, formerly PINRO), 6, Academician Knipovich Street, Murmansk 183038, RussiaInstitute of Marine Research, P.O. Box 1870 Nordnes, 5817 Bergen, NorwayCentre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0316 Oslo, NorwayInstitute of Marine Research, P.O. Box 1870 Nordnes, 5817 Bergen, Norway<p>A new dataset on the diet of Atlantic cod in the Barents Sea from the 1930s to the present day has been compiled to produce one of the largest fish diet datasets available globally. Atlantic cod is one of the most ecologically and commercially important fish species in the North Atlantic. The stock in the Barents Sea is by far the largest, as a result of both successful management and favourable environmental conditions since the early 2000s. As a top predator, cod plays a key role in the Barents Sea ecosystem. The species has a broad diet consisting mainly of crustaceans and teleost fish, and both the amount and type of prey vary in space and time. The data – from Russia, Norway and the United Kingdom – represent quantitative stomach content records from more than 400 000 fish and qualitative data from 2.5 million fish. Many of the data are from joint collaborative surveys between Norway and Russia. The sampling was conducted throughout each year, allowing for seasonal, annual and decadal comparisons to be made. Visual analysis shows cod diets have changed considerably from the start of the dataset in the 1930s to the present day. There was a large proportion of herring in the diets in the 1930s, whereas in more recent decades capelin, invertebrates and other fish dominate. There are also significant interannual asynchronous fluctuations in prey, particularly capelin and euphausiids. Combining these datasets can help us understand how the environment and ecosystems are responding to climatic changes, and what influences the diet and prey switching of cod. Trends in temperature and variability indices can be tested against the occurrence of different prey items, and the effects of fishing pressure on cod and prey stocks on diet composition could be investigated. The dataset will also enable us to improve parametrization of food web models and to forecast how Barents Sea fisheries may respond in the future to management and to climate change. The Russian data are available through joint projects with the Polar Branch of the Russian Federal Research Institute of Fisheries and Oceanography (VNIRO). The UK and Norwegian data (Townhill et al., 2020) are being released with this paper at <a href="https://doi.org/10.21335/NMDC-2139169383">https://doi.org/10.21335/NMDC-2139169383</a>.</p>https://essd.copernicus.org/articles/13/1361/2021/essd-13-1361-2021.pdf |
| spellingShingle | B. L. Townhill R. E. Holt B. Bogstad J. M. Durant J. K. Pinnegar J. K. Pinnegar A. V. Dolgov A. V. Dolgov A. V. Dolgov N. A. Yaragina E. Johannesen G. Ottersen G. Ottersen Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 Earth System Science Data |
| title | Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 |
| title_full | Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 |
| title_fullStr | Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 |
| title_full_unstemmed | Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 |
| title_short | Diets of the Barents Sea cod (<i>Gadus morhua</i>) from the 1930s to 2018 |
| title_sort | diets of the barents sea cod i gadus morhua i from the 1930s to 2018 |
| url | https://essd.copernicus.org/articles/13/1361/2021/essd-13-1361-2021.pdf |
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