External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada
Up to 40% of whitefish (Coregonus nasus and C. clupeaformis) sampled during spawning migrations from the area of the Mackenzie Delta, N.W.T., had external scars. Percent frequency of scarred individuals varied geographically from the Mackenzie mainstem and tributaries, where 20% were scarred, to And...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/z87-191 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-191 |
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crcansciencepubl:10.1139/z87-191 2023-12-17T10:25:26+01:00 External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada Reist, J. D. Bodaly, R. A. Fudge, R. J. P. Cash, K. J. Stevens, T. V. 1987 http://dx.doi.org/10.1139/z87-191 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-191 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 5, page 1230-1239 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-191 2023-11-19T13:38:58Z Up to 40% of whitefish (Coregonus nasus and C. clupeaformis) sampled during spawning migrations from the area of the Mackenzie Delta, N.W.T., had external scars. Percent frequency of scarred individuals varied geographically from the Mackenzie mainstem and tributaries, where 20% were scarred, to Anderson river (2%), Cox Lake (16%), and Alaska (0–7%). Within the Mackenzie system fish captured at mainstem locations had approximately twice the frequency of scarring than did fish from tributary locations. Scars were classified as either slash or round type. Both scar types were located more frequently on the left side of the fishes and below the lateral line. Details of orientation and location on the body provided clues permitting the assignment of putative causation. Small round scars were restricted to locations with connections to the Arctic Ocean and were probably caused by the marine parasitic copepod Coregonicola or by Arctic lampreys (Lampetra japonica). Larger round scars were either the result of attacks by lampreys or by previous gill net capture. Unequal distribution and orientation on the body of slash scars indicated previous capture in gill nets or predation attempts by bears, birds, or piscivorous fishes. Article in Journal/Newspaper Arctic Arctic Ocean Mackenzie Delta Northwest Territories Alaska Canadian Science Publishing (via Crossref) Arctic Arctic Ocean Northwest Territories Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Cox Lake ENVELOPE(-116.583,-116.583,67.900,67.900) Canadian Journal of Zoology 65 5 1230 1239 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Reist, J. D. Bodaly, R. A. Fudge, R. J. P. Cash, K. J. Stevens, T. V. External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Up to 40% of whitefish (Coregonus nasus and C. clupeaformis) sampled during spawning migrations from the area of the Mackenzie Delta, N.W.T., had external scars. Percent frequency of scarred individuals varied geographically from the Mackenzie mainstem and tributaries, where 20% were scarred, to Anderson river (2%), Cox Lake (16%), and Alaska (0–7%). Within the Mackenzie system fish captured at mainstem locations had approximately twice the frequency of scarring than did fish from tributary locations. Scars were classified as either slash or round type. Both scar types were located more frequently on the left side of the fishes and below the lateral line. Details of orientation and location on the body provided clues permitting the assignment of putative causation. Small round scars were restricted to locations with connections to the Arctic Ocean and were probably caused by the marine parasitic copepod Coregonicola or by Arctic lampreys (Lampetra japonica). Larger round scars were either the result of attacks by lampreys or by previous gill net capture. Unequal distribution and orientation on the body of slash scars indicated previous capture in gill nets or predation attempts by bears, birds, or piscivorous fishes. |
format |
Article in Journal/Newspaper |
author |
Reist, J. D. Bodaly, R. A. Fudge, R. J. P. Cash, K. J. Stevens, T. V. |
author_facet |
Reist, J. D. Bodaly, R. A. Fudge, R. J. P. Cash, K. J. Stevens, T. V. |
author_sort |
Reist, J. D. |
title |
External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
title_short |
External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
title_full |
External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
title_fullStr |
External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
title_full_unstemmed |
External scarring of whitefish, Coregonus nasus and C . clupeaformis complex, from the western Northwest Territories, Canada |
title_sort |
external scarring of whitefish, coregonus nasus and c . clupeaformis complex, from the western northwest territories, canada |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-191 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-191 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-116.583,-116.583,67.900,67.900) |
geographic |
Arctic Arctic Ocean Northwest Territories Canada Mackenzie Delta Cox Lake |
geographic_facet |
Arctic Arctic Ocean Northwest Territories Canada Mackenzie Delta Cox Lake |
genre |
Arctic Arctic Ocean Mackenzie Delta Northwest Territories Alaska |
genre_facet |
Arctic Arctic Ocean Mackenzie Delta Northwest Territories Alaska |
op_source |
Canadian Journal of Zoology volume 65, issue 5, page 1230-1239 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-191 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
5 |
container_start_page |
1230 |
op_container_end_page |
1239 |
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1785576807010926592 |