Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults
Adult Atlantic cod (Gadus morhua) produce antifreeze glycopeptides during the winter which help to depress the freezing point of their blood plasma to approximately −1.2 °C. Since the temperature at which fish can freeze and die approximates the freezing point of their blood plasma, it is evident th...
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Canadian Science Publishing
1988
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Online Access: | http://dx.doi.org/10.1139/f88-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-109 |
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crcansciencepubl:10.1139/f88-109 2023-12-17T10:27:00+01:00 Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults Kao, Ming H. Fletcher, Garth L. 1988 http://dx.doi.org/10.1139/f88-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-109 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 5, page 902-905 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crcansciencepubl https://doi.org/10.1139/f88-109 2023-11-19T13:39:04Z Adult Atlantic cod (Gadus morhua) produce antifreeze glycopeptides during the winter which help to depress the freezing point of their blood plasma to approximately −1.2 °C. Since the temperature at which fish can freeze and die approximates the freezing point of their blood plasma, it is evident that adult cod do not have the capacity to survive in ice-laden waters when the water temperatures drop to −1.5 °C. Templeman and Fleming hypothesized that small cod are more adapted to cold water than adults. The present study documents the fact that the blood plasma freezing points of juvenile cod (mean length = 33 cm, 3-yr-olds) were significantly lower than those of adult cod (> 45 cm) (juvenile, −1.55 °C; adult, −1.23 °C). This difference was largely attributable to the doubling of plasma antifreeze glycopeptide levels in the juvenile cod. These results directly support Templeman and Fleming's hypothesis and indicate that juvenile cod, unlike adults, are capable of surviving the icy marine conditions which prevail along the northeast coast of Newfoundland during the winter. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 45 5 902 905 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Kao, Ming H. Fletcher, Garth L. Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Adult Atlantic cod (Gadus morhua) produce antifreeze glycopeptides during the winter which help to depress the freezing point of their blood plasma to approximately −1.2 °C. Since the temperature at which fish can freeze and die approximates the freezing point of their blood plasma, it is evident that adult cod do not have the capacity to survive in ice-laden waters when the water temperatures drop to −1.5 °C. Templeman and Fleming hypothesized that small cod are more adapted to cold water than adults. The present study documents the fact that the blood plasma freezing points of juvenile cod (mean length = 33 cm, 3-yr-olds) were significantly lower than those of adult cod (> 45 cm) (juvenile, −1.55 °C; adult, −1.23 °C). This difference was largely attributable to the doubling of plasma antifreeze glycopeptide levels in the juvenile cod. These results directly support Templeman and Fleming's hypothesis and indicate that juvenile cod, unlike adults, are capable of surviving the icy marine conditions which prevail along the northeast coast of Newfoundland during the winter. |
format |
Article in Journal/Newspaper |
author |
Kao, Ming H. Fletcher, Garth L. |
author_facet |
Kao, Ming H. Fletcher, Garth L. |
author_sort |
Kao, Ming H. |
title |
Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
title_short |
Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
title_full |
Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
title_fullStr |
Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
title_full_unstemmed |
Juvenile Atlantic Cod ( Gadus morhua ) Can Be More Freeze Resistant than Adults |
title_sort |
juvenile atlantic cod ( gadus morhua ) can be more freeze resistant than adults |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/f88-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-109 |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 5, page 902-905 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f88-109 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
45 |
container_issue |
5 |
container_start_page |
902 |
op_container_end_page |
905 |
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1785578761861726208 |