Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data
Tag–recapture data contain valuable information about individual fish growth, which can enhance the estimation of growth parameters. Tag–recapture data are especially useful when age-determination uncertainties throw age-based growth estimates and stock assessments into question, as is the present s...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2018-0081 |
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crcansciencepubl:10.1139/cjfas-2018-0081 2024-04-07T07:52:32+00:00 Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data McQueen, Kate Eveson, J. Paige Dolk, Bodo Lorenz, Thomas Mohr, Thomas Schade, Franziska M. Krumme, Uwe 2019 http://dx.doi.org/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2018-0081 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 76, issue 8, page 1326-1337 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2019 crcansciencepubl https://doi.org/10.1139/cjfas-2018-0081 2024-03-08T00:37:47Z Tag–recapture data contain valuable information about individual fish growth, which can enhance the estimation of growth parameters. Tag–recapture data are especially useful when age-determination uncertainties throw age-based growth estimates and stock assessments into question, as is the present situation with several important gadoid stocks. Length-based (GROTAG method) and age-based (LEP method) growth functions were fit to a large data set of tagged and recaptured cod (Gadus morhua) from an artificial reef in the western Baltic Sea to calculate improved growth parameter estimates. The LEP method allowed integration of different data formats, including tag–recapture, length frequency, and length-at-age, to estimate a more robust and comprehensive growth function (von Bertalanffy growth parameters: L ∞ = 154.56 cm, k = 0.11, t 0 = –0.13). Two heavily exploited cod stocks inhabit the Baltic Sea, subsisting at the upper thermal and lower salinity limits of the species. Otolith shape analyses indicated that, unexpectedly, individuals from both populations were resident at the reef. Compared with cod populations elsewhere, cod in the western Baltic Sea grow relatively slowly and with weak seasonal fluctuations in growth rates, potentially due to adverse conditions for growth. Article in Journal/Newspaper Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 76 8 1326 1337 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics McQueen, Kate Eveson, J. Paige Dolk, Bodo Lorenz, Thomas Mohr, Thomas Schade, Franziska M. Krumme, Uwe Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Tag–recapture data contain valuable information about individual fish growth, which can enhance the estimation of growth parameters. Tag–recapture data are especially useful when age-determination uncertainties throw age-based growth estimates and stock assessments into question, as is the present situation with several important gadoid stocks. Length-based (GROTAG method) and age-based (LEP method) growth functions were fit to a large data set of tagged and recaptured cod (Gadus morhua) from an artificial reef in the western Baltic Sea to calculate improved growth parameter estimates. The LEP method allowed integration of different data formats, including tag–recapture, length frequency, and length-at-age, to estimate a more robust and comprehensive growth function (von Bertalanffy growth parameters: L ∞ = 154.56 cm, k = 0.11, t 0 = –0.13). Two heavily exploited cod stocks inhabit the Baltic Sea, subsisting at the upper thermal and lower salinity limits of the species. Otolith shape analyses indicated that, unexpectedly, individuals from both populations were resident at the reef. Compared with cod populations elsewhere, cod in the western Baltic Sea grow relatively slowly and with weak seasonal fluctuations in growth rates, potentially due to adverse conditions for growth. |
format |
Article in Journal/Newspaper |
author |
McQueen, Kate Eveson, J. Paige Dolk, Bodo Lorenz, Thomas Mohr, Thomas Schade, Franziska M. Krumme, Uwe |
author_facet |
McQueen, Kate Eveson, J. Paige Dolk, Bodo Lorenz, Thomas Mohr, Thomas Schade, Franziska M. Krumme, Uwe |
author_sort |
McQueen, Kate |
title |
Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
title_short |
Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
title_full |
Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
title_fullStr |
Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
title_full_unstemmed |
Growth of cod ( Gadus morhua ) in the western Baltic Sea: estimating improved growth parameters from tag–recapture data |
title_sort |
growth of cod ( gadus morhua ) in the western baltic sea: estimating improved growth parameters from tag–recapture data |
publisher |
Canadian Science Publishing |
publishDate |
2019 |
url |
http://dx.doi.org/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2018-0081 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2018-0081 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 76, issue 8, page 1326-1337 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2018-0081 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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76 |
container_issue |
8 |
container_start_page |
1326 |
op_container_end_page |
1337 |
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1795667935635701760 |