Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity
During three consecutive years of observation 23 Atlantic cod ( Gadus morhua ) were tagged with ultrasonic transmitters as part of two experiments to determine the movement patterns of adult cod in the genetically distinctive population inhabiting Gilbert Bay, Labrador. Individual cod were relocated...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
2000
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Online Access: | http://dx.doi.org/10.1017/s0025315400003143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400003143 |
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crcambridgeupr:10.1017/s0025315400003143 2024-06-16T07:38:34+00:00 Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity Green, John M. Wroblewski, Joseph S. 2000 http://dx.doi.org/10.1017/s0025315400003143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400003143 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 80, issue 6, page 1077-1085 ISSN 0025-3154 1469-7769 journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0025315400003143 2024-05-22T12:56:13Z During three consecutive years of observation 23 Atlantic cod ( Gadus morhua ) were tagged with ultrasonic transmitters as part of two experiments to determine the movement patterns of adult cod in the genetically distinctive population inhabiting Gilbert Bay, Labrador. Individual cod were relocated for periods up to 15 months, indicating year-round residency within the bay despite unimpeded access to the open ocean. The tracking data show that individual cod have a strong homing tendency. In experiment 1 displaced cod returned (homed) to their place of capture in a small arm separated from the rest of the bay by a shallow sill while non-displaced fish remained at their capture site. In experiment 2 some cod remained within 2 km of their capture/release site, a spawning area, while others ranged widely in Gilbert Bay before returning to this site. Whether an individual ranged widely or had more restricted movements was not related to size. Cod exhibited wider ranging movements in the spring and early summer, following spawning, than in the late summer and early autumn. The return of Gilbert Bay cod to specific locations in the inner part of the bay to overwinter and spawn is evidence of one mechanism that could have led to their genetic distinctiveness. Article in Journal/Newspaper atlantic cod Gadus morhua Cambridge University Press Gilbert Bay ENVELOPE(-55.998,-55.998,52.633,52.633) Journal of the Marine Biological Association of the United Kingdom 80 6 1077 1085 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
During three consecutive years of observation 23 Atlantic cod ( Gadus morhua ) were tagged with ultrasonic transmitters as part of two experiments to determine the movement patterns of adult cod in the genetically distinctive population inhabiting Gilbert Bay, Labrador. Individual cod were relocated for periods up to 15 months, indicating year-round residency within the bay despite unimpeded access to the open ocean. The tracking data show that individual cod have a strong homing tendency. In experiment 1 displaced cod returned (homed) to their place of capture in a small arm separated from the rest of the bay by a shallow sill while non-displaced fish remained at their capture site. In experiment 2 some cod remained within 2 km of their capture/release site, a spawning area, while others ranged widely in Gilbert Bay before returning to this site. Whether an individual ranged widely or had more restricted movements was not related to size. Cod exhibited wider ranging movements in the spring and early summer, following spawning, than in the late summer and early autumn. The return of Gilbert Bay cod to specific locations in the inner part of the bay to overwinter and spawn is evidence of one mechanism that could have led to their genetic distinctiveness. |
format |
Article in Journal/Newspaper |
author |
Green, John M. Wroblewski, Joseph S. |
spellingShingle |
Green, John M. Wroblewski, Joseph S. Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
author_facet |
Green, John M. Wroblewski, Joseph S. |
author_sort |
Green, John M. |
title |
Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
title_short |
Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
title_full |
Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
title_fullStr |
Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
title_full_unstemmed |
Movement patterns of Atlantic cod in Gilbert Bay, Labrador: evidence for bay residency and spawning site fidelity |
title_sort |
movement patterns of atlantic cod in gilbert bay, labrador: evidence for bay residency and spawning site fidelity |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0025315400003143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400003143 |
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 |
Journal of the Marine Biological Association of the United Kingdom volume 80, issue 6, page 1077-1085 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400003143 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
80 |
container_issue |
6 |
container_start_page |
1077 |
op_container_end_page |
1085 |
_version_ |
1802005244371009536 |