Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod
Norwegian coastal (NC) and northeast Arctic (NA) Atlantic cod (Gadus morhua) larvae were reared on live zooplankton to investigate temperature- and size-specific growth. Larval and juvenile growth was temperature and size dependent. Growth in length and weight increased with increasing temperature f...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1999
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Online Access: | http://dx.doi.org/10.1139/f99-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-168 |
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crcansciencepubl:10.1139/f99-168 2024-09-15T17:52:28+00:00 Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod Otterlei, Erling Nyhammer, Gunnar Folkvord, Arild Stefansson, Sigurd O 1999 http://dx.doi.org/10.1139/f99-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-168 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 11, page 2099-2111 ISSN 0706-652X 1205-7533 journal-article 1999 crcansciencepubl https://doi.org/10.1139/f99-168 2024-08-01T04:10:02Z Norwegian coastal (NC) and northeast Arctic (NA) Atlantic cod (Gadus morhua) larvae were reared on live zooplankton to investigate temperature- and size-specific growth. Larval and juvenile growth was temperature and size dependent. Growth in length and weight increased with increasing temperature from 4 to 14°C, with a corresponding reduced larval stage duration. Maximum growth rate occurred at a larval size of 0.1-1.0 mg dry weight, followed by a declining trend during the juvenile stage. The temperature optimum of larval cod fed in excess is estimated to be between 14 and 16°C, with a maximum weight-specific growth potential exceeding 25%·day -1 . Temperature- and stock-specific growth curves of dry weight at age are well described by a generalized Gompertz model. A stock-specific difference in mean weight at age was observed, with NC growing better than NA. Neither countergradient latitudinal variation in growth capacity of the two larval cod stocks nor temperature adaptation across latitudes was indicated. A stock-specific difference in weight at length was observed in early juveniles, with NC being heavier than NA. Overall, a positive correlation between temperature and condition level was found. No distinct temperature- or stock-specific differences in survival were observed. Article in Journal/Newspaper Arctic cod atlantic cod Gadus morhua Northeast Arctic cod Zooplankton Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 56 11 2099 2111 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Norwegian coastal (NC) and northeast Arctic (NA) Atlantic cod (Gadus morhua) larvae were reared on live zooplankton to investigate temperature- and size-specific growth. Larval and juvenile growth was temperature and size dependent. Growth in length and weight increased with increasing temperature from 4 to 14°C, with a corresponding reduced larval stage duration. Maximum growth rate occurred at a larval size of 0.1-1.0 mg dry weight, followed by a declining trend during the juvenile stage. The temperature optimum of larval cod fed in excess is estimated to be between 14 and 16°C, with a maximum weight-specific growth potential exceeding 25%·day -1 . Temperature- and stock-specific growth curves of dry weight at age are well described by a generalized Gompertz model. A stock-specific difference in mean weight at age was observed, with NC growing better than NA. Neither countergradient latitudinal variation in growth capacity of the two larval cod stocks nor temperature adaptation across latitudes was indicated. A stock-specific difference in weight at length was observed in early juveniles, with NC being heavier than NA. Overall, a positive correlation between temperature and condition level was found. No distinct temperature- or stock-specific differences in survival were observed. |
format |
Article in Journal/Newspaper |
author |
Otterlei, Erling Nyhammer, Gunnar Folkvord, Arild Stefansson, Sigurd O |
spellingShingle |
Otterlei, Erling Nyhammer, Gunnar Folkvord, Arild Stefansson, Sigurd O Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
author_facet |
Otterlei, Erling Nyhammer, Gunnar Folkvord, Arild Stefansson, Sigurd O |
author_sort |
Otterlei, Erling |
title |
Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
title_short |
Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
title_full |
Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
title_fullStr |
Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
title_full_unstemmed |
Temperature- and size-dependent growth of larval and early juvenile Atlantic cod ( Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod |
title_sort |
temperature- and size-dependent growth of larval and early juvenile atlantic cod ( gadus morhua): a comparative study of norwegian coastal cod and northeast arctic cod |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/f99-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-168 |
genre |
Arctic cod atlantic cod Gadus morhua Northeast Arctic cod Zooplankton |
genre_facet |
Arctic cod atlantic cod Gadus morhua Northeast Arctic cod Zooplankton |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 11, page 2099-2111 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f99-168 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
56 |
container_issue |
11 |
container_start_page |
2099 |
op_container_end_page |
2111 |
_version_ |
1810294489599705088 |