Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year
Atlantic cod ( Gadus morhua Linnaeus, 1758) can experience mortality at sub-zero (<0 °C) temperatures in ice-infested waters, and many populations migrate to deeper and warmer areas during winter. An exception is the resident population in Gilbert Bay, Labrador, which annually experiences 6 month...
Published in: | Canadian Journal of Zoology |
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crcansciencepubl:10.1139/cjz-2023-0067 2024-04-07T07:50:52+00:00 Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year Green, John M. Schornagel, Dustin Nguyen, Khanh Q. Pennell, Curtis Morris, Corey J. Fisheries and Oceans Canada 2024 http://dx.doi.org/10.1139/cjz-2023-0067 https://cdnsciencepub.com/doi/full-xml/10.1139/cjz-2023-0067 https://cdnsciencepub.com/doi/pdf/10.1139/cjz-2023-0067 en eng Canadian Science Publishing https://creativecommons.org/licenses/by/4.0/deed.en_GB Canadian Journal of Zoology volume 102, issue 3, page 253-263 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2024 crcansciencepubl https://doi.org/10.1139/cjz-2023-0067 2024-03-08T00:37:45Z Atlantic cod ( Gadus morhua Linnaeus, 1758) can experience mortality at sub-zero (<0 °C) temperatures in ice-infested waters, and many populations migrate to deeper and warmer areas during winter. An exception is the resident population in Gilbert Bay, Labrador, which annually experiences 6 months of sub-zero temperatures. We used the VEMCO Positioning System to estimate fish locations to determine depth utilization and seasonal movements of tagged Gilbert Bay cod ranging in size from 43 to 75 cm. This is the first study to directly monitor the movements of adult Atlantic cod for extended periods (months) in sub-zero temperatures. Gilbert Bay cod remained active under an ice-covered surface during the 6 months of sub-zero temperatures. During both warm (>0 °C) and cold (≤0 °C) periods, fish spent similar amounts of time not moving, moving slowly, and moving at medium and fast rates. They tended to utilize shallow depths, <10 m, beneath surface ice during winter, while utilizing deeper depths as well during other times of the year. Surprisingly, fish that resided within our tracking array year-round had greater cumulative swimming distances during sub-zero periods compared to warmer periods. No tracked fish died during winter, further highlighting the cold adaptiveness of this population and its importance to biodiversity conservation. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Gilbert Bay ENVELOPE(-55.998,-55.998,52.633,52.633) Canadian Journal of Zoology |
institution |
Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Green, John M. Schornagel, Dustin Nguyen, Khanh Q. Pennell, Curtis Morris, Corey J. Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Atlantic cod ( Gadus morhua Linnaeus, 1758) can experience mortality at sub-zero (<0 °C) temperatures in ice-infested waters, and many populations migrate to deeper and warmer areas during winter. An exception is the resident population in Gilbert Bay, Labrador, which annually experiences 6 months of sub-zero temperatures. We used the VEMCO Positioning System to estimate fish locations to determine depth utilization and seasonal movements of tagged Gilbert Bay cod ranging in size from 43 to 75 cm. This is the first study to directly monitor the movements of adult Atlantic cod for extended periods (months) in sub-zero temperatures. Gilbert Bay cod remained active under an ice-covered surface during the 6 months of sub-zero temperatures. During both warm (>0 °C) and cold (≤0 °C) periods, fish spent similar amounts of time not moving, moving slowly, and moving at medium and fast rates. They tended to utilize shallow depths, <10 m, beneath surface ice during winter, while utilizing deeper depths as well during other times of the year. Surprisingly, fish that resided within our tracking array year-round had greater cumulative swimming distances during sub-zero periods compared to warmer periods. No tracked fish died during winter, further highlighting the cold adaptiveness of this population and its importance to biodiversity conservation. |
author2 |
Fisheries and Oceans Canada |
format |
Article in Journal/Newspaper |
author |
Green, John M. Schornagel, Dustin Nguyen, Khanh Q. Pennell, Curtis Morris, Corey J. |
author_facet |
Green, John M. Schornagel, Dustin Nguyen, Khanh Q. Pennell, Curtis Morris, Corey J. |
author_sort |
Green, John M. |
title |
Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
title_short |
Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
title_full |
Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
title_fullStr |
Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
title_full_unstemmed |
Field observations of the movements of locally adapted Atlantic cod ( Gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
title_sort |
field observations of the movements of locally adapted atlantic cod ( gadus morhua ) living in zero and sub-zero centigrade temperatures for half the year |
publisher |
Canadian Science Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1139/cjz-2023-0067 https://cdnsciencepub.com/doi/full-xml/10.1139/cjz-2023-0067 https://cdnsciencepub.com/doi/pdf/10.1139/cjz-2023-0067 |
long_lat |
ENVELOPE(-55.998,-55.998,52.633,52.633) |
geographic |
Gilbert Bay |
geographic_facet |
Gilbert Bay |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Zoology volume 102, issue 3, page 253-263 ISSN 0008-4301 1480-3283 |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.en_GB |
op_doi |
https://doi.org/10.1139/cjz-2023-0067 |
container_title |
Canadian Journal of Zoology |
_version_ |
1795665655811276800 |