Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data
We describe geographic and host size related trends in the prevalence of the gill parasite Lernaeocera branchialis (Copepoda, Pennellidae) infecting Atlantic cod (Gadus morhua) in coastal Newfoundland and Labrador and assess the effect of parasitism on cod survival in the wild. Using cod-tagging stu...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1998
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Online Access: | http://dx.doi.org/10.1139/f97-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-209 |
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crcansciencepubl:10.1139/f97-209 2023-12-17T10:26:59+01:00 Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data Jones, Megan EB Taggart, Christopher T 1998 http://dx.doi.org/10.1139/f97-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-209 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 2, page 364-375 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1998 crcansciencepubl https://doi.org/10.1139/f97-209 2023-11-19T13:38:23Z We describe geographic and host size related trends in the prevalence of the gill parasite Lernaeocera branchialis (Copepoda, Pennellidae) infecting Atlantic cod (Gadus morhua) in coastal Newfoundland and Labrador and assess the effect of parasitism on cod survival in the wild. Using cod-tagging studies conducted between 1962 and 1989, we test three null hypotheses: (1) parasite prevalence in the Northwest Atlantic is latitudinally invariant, (2) infected cod have the same survival probability as parasite-free cod, and (3) parasite prevalence is independent of fish length. The first hypothesis is rejected given a significantly negative relationship between prevalence and latitude. The second hypothesis is rejected in one geographic region where 8% fewer infected cod from northeast Newfoundland were recaptured relative to uninfected cod. This implies that parasitized cod can suffer an 8% differentially higher mortality relative to nonparasitized cod. The third hypothesis is rejected because the proportion of cod infected was generally greatest in the 43-49 cm length-class and decreased significantly with increasing length. Differential survival between infected and uninfected cod within length-classes was not observed. The use of L. branchialis as a population marker warrants caution. The parasite has the potential to affect the recovery of depleted Northwest Atlantic cod stocks in a geographically differential manner. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Northwest Atlantic Canadian Science Publishing (via Crossref) Newfoundland Canadian Journal of Fisheries and Aquatic Sciences 55 2 364 375 |
institution |
Open Polar |
collection |
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 Jones, Megan EB Taggart, Christopher T Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We describe geographic and host size related trends in the prevalence of the gill parasite Lernaeocera branchialis (Copepoda, Pennellidae) infecting Atlantic cod (Gadus morhua) in coastal Newfoundland and Labrador and assess the effect of parasitism on cod survival in the wild. Using cod-tagging studies conducted between 1962 and 1989, we test three null hypotheses: (1) parasite prevalence in the Northwest Atlantic is latitudinally invariant, (2) infected cod have the same survival probability as parasite-free cod, and (3) parasite prevalence is independent of fish length. The first hypothesis is rejected given a significantly negative relationship between prevalence and latitude. The second hypothesis is rejected in one geographic region where 8% fewer infected cod from northeast Newfoundland were recaptured relative to uninfected cod. This implies that parasitized cod can suffer an 8% differentially higher mortality relative to nonparasitized cod. The third hypothesis is rejected because the proportion of cod infected was generally greatest in the 43-49 cm length-class and decreased significantly with increasing length. Differential survival between infected and uninfected cod within length-classes was not observed. The use of L. branchialis as a population marker warrants caution. The parasite has the potential to affect the recovery of depleted Northwest Atlantic cod stocks in a geographically differential manner. |
format |
Article in Journal/Newspaper |
author |
Jones, Megan EB Taggart, Christopher T |
author_facet |
Jones, Megan EB Taggart, Christopher T |
author_sort |
Jones, Megan EB |
title |
Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
title_short |
Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
title_full |
Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
title_fullStr |
Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
title_full_unstemmed |
Distribution of gill parasite ( Lernaeocera branchialis ) infection in Northwest Atlantic cod ( Gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
title_sort |
distribution of gill parasite ( lernaeocera branchialis ) infection in northwest atlantic cod ( gadus morhua ) and parasite-induced host mortality: inferences from tagging data |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/f97-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-209 |
geographic |
Newfoundland |
geographic_facet |
Newfoundland |
genre |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 2, page 364-375 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f97-209 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
55 |
container_issue |
2 |
container_start_page |
364 |
op_container_end_page |
375 |
_version_ |
1785578743299833856 |