Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction
We investigate whether a process-oriented approach based on the results of field, laboratory, and modelling studies can be used to develop a stockenvironmentrecruitment model for Central Baltic cod (Gadus morhua). Based on exploratory statistical analysis, significant variables influencing surviva...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f01-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-093 |
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crcansciencepubl:10.1139/f01-093 2024-09-15T18:07:19+00:00 Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction Köster, Friedrich W Hinrichsen, Hans-Harald St. John, Michael A Schnack, Dietrich MacKenzie, Brian R Tomkiewicz, Jonna Plikshs, Maris 2001 http://dx.doi.org/10.1139/f01-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-093 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 8, page 1534-1556 ISSN 0706-652X 1205-7533 journal-article 2001 crcansciencepubl https://doi.org/10.1139/f01-093 2024-08-08T04:13:33Z We investigate whether a process-oriented approach based on the results of field, laboratory, and modelling studies can be used to develop a stockenvironmentrecruitment model for Central Baltic cod (Gadus morhua). Based on exploratory statistical analysis, significant variables influencing survival of early life stages and varying systematically among spawning sites were incorporated into stockrecruitment models, first for major cod spawning sites and then combined for the entire Central Baltic. Variables identified included potential egg production by the spawning stock, abiotic conditions affecting survival of eggs, predation by clupeids on eggs, larval transport, and cannibalism. Results showed that recruitment in the most important spawning area, the Bornholm Basin, during 19761995 was related to egg production; however, other factors affecting survival of the eggs (oxygen conditions, predation) were also significant and when incorporated explained 69% of the variation in 0-group recruitment. In other spawning areas, variable hydrographic conditions did not allow for regular successful egg development. Hence, relatively simple models proved sufficient to predict recruitment of 0-group cod in these areas, suggesting that key biotic and abiotic processes can be successfully incorporated into recruitment models. Article in Journal/Newspaper Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 58 8 1534 1556 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
We investigate whether a process-oriented approach based on the results of field, laboratory, and modelling studies can be used to develop a stockenvironmentrecruitment model for Central Baltic cod (Gadus morhua). Based on exploratory statistical analysis, significant variables influencing survival of early life stages and varying systematically among spawning sites were incorporated into stockrecruitment models, first for major cod spawning sites and then combined for the entire Central Baltic. Variables identified included potential egg production by the spawning stock, abiotic conditions affecting survival of eggs, predation by clupeids on eggs, larval transport, and cannibalism. Results showed that recruitment in the most important spawning area, the Bornholm Basin, during 19761995 was related to egg production; however, other factors affecting survival of the eggs (oxygen conditions, predation) were also significant and when incorporated explained 69% of the variation in 0-group recruitment. In other spawning areas, variable hydrographic conditions did not allow for regular successful egg development. Hence, relatively simple models proved sufficient to predict recruitment of 0-group cod in these areas, suggesting that key biotic and abiotic processes can be successfully incorporated into recruitment models. |
format |
Article in Journal/Newspaper |
author |
Köster, Friedrich W Hinrichsen, Hans-Harald St. John, Michael A Schnack, Dietrich MacKenzie, Brian R Tomkiewicz, Jonna Plikshs, Maris |
spellingShingle |
Köster, Friedrich W Hinrichsen, Hans-Harald St. John, Michael A Schnack, Dietrich MacKenzie, Brian R Tomkiewicz, Jonna Plikshs, Maris Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
author_facet |
Köster, Friedrich W Hinrichsen, Hans-Harald St. John, Michael A Schnack, Dietrich MacKenzie, Brian R Tomkiewicz, Jonna Plikshs, Maris |
author_sort |
Köster, Friedrich W |
title |
Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
title_short |
Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
title_full |
Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
title_fullStr |
Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
title_full_unstemmed |
Developing Baltic cod recruitment models. II. Incorporation of environmental variability and species interaction |
title_sort |
developing baltic cod recruitment models. ii. incorporation of environmental variability and species interaction |
publisher |
Canadian Science Publishing |
publishDate |
2001 |
url |
http://dx.doi.org/10.1139/f01-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-093 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 8, page 1534-1556 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f01-093 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
58 |
container_issue |
8 |
container_start_page |
1534 |
op_container_end_page |
1556 |
_version_ |
1810444696362680320 |