Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia
Abstract Reports of infestations of sea lice Lepeophtheirus salmonis and Caligus clemensi in juvenile salmonids in Pacific Canada have been restricted to pink salmon Oncorhynchus gorbuscha and chum salmon O. keta from one salmon‐farming region, the Broughton Archipelago of British Columbia. Here, we...
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crwiley:10.1577/m07-042.1 2023-12-03T10:28:35+01:00 Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia Morton, Alexandra Routledge, Rick Krkosek, Martin Natural Sciences and Engineering Research Council of Canada 2008 http://dx.doi.org/10.1577/m07-042.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/M07-042.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor North American Journal of Fisheries Management volume 28, issue 2, page 523-532 ISSN 0275-5947 1548-8675 Management, Monitoring, Policy and Law Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2008 crwiley https://doi.org/10.1577/m07-042.1 2023-11-09T14:25:51Z Abstract Reports of infestations of sea lice Lepeophtheirus salmonis and Caligus clemensi in juvenile salmonids in Pacific Canada have been restricted to pink salmon Oncorhynchus gorbuscha and chum salmon O. keta from one salmon‐farming region, the Broughton Archipelago of British Columbia. Here, we report on 2 years of sea louse field surveys of wild juvenile pink and chum salmon, as well as wild sockeye salmon O. nerka and larval Pacific herring Clupea pallasii, in another salmon farming region, the Discovery Islands region of British Columbia. For pink and chum salmon we tested for the dependency of sea louse abundance on temperature, salinity, sampling period, host species, and farm exposure category. For both louse species, farm exposure was the only consistently significant predictor of sea lice abundance. Fish exposed to salmon farms were infected with more sea lice than those in the peripheral category. Sea louse abundance on sockeye salmon and Pacific herring followed the same trends, but sample sizes were too low to support formal statistical analysis. The Pacific herring were translucent and lacked scales, and they were primarily parasitized by C. clemensi. These results suggest that the association of salmon farms with sea lice infestations of wild juvenile fish in Pacific Canada now extends beyond juvenile pink and chum salmon in the Broughton Archipelago. Canada's most abundant and economically valuable salmon populations, as well as British Columbia's most valuable Pacific herring stock, migrate through the Discovery Islands; hence, parasite transmission from farm to wild fish in this region may have important economic and ecological implications. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Wiley Online Library (via Crossref) British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) North American Journal of Fisheries Management 28 2 523 532 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Management, Monitoring, Policy and Law Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Management, Monitoring, Policy and Law Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Morton, Alexandra Routledge, Rick Krkosek, Martin Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
topic_facet |
Management, Monitoring, Policy and Law Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Reports of infestations of sea lice Lepeophtheirus salmonis and Caligus clemensi in juvenile salmonids in Pacific Canada have been restricted to pink salmon Oncorhynchus gorbuscha and chum salmon O. keta from one salmon‐farming region, the Broughton Archipelago of British Columbia. Here, we report on 2 years of sea louse field surveys of wild juvenile pink and chum salmon, as well as wild sockeye salmon O. nerka and larval Pacific herring Clupea pallasii, in another salmon farming region, the Discovery Islands region of British Columbia. For pink and chum salmon we tested for the dependency of sea louse abundance on temperature, salinity, sampling period, host species, and farm exposure category. For both louse species, farm exposure was the only consistently significant predictor of sea lice abundance. Fish exposed to salmon farms were infected with more sea lice than those in the peripheral category. Sea louse abundance on sockeye salmon and Pacific herring followed the same trends, but sample sizes were too low to support formal statistical analysis. The Pacific herring were translucent and lacked scales, and they were primarily parasitized by C. clemensi. These results suggest that the association of salmon farms with sea lice infestations of wild juvenile fish in Pacific Canada now extends beyond juvenile pink and chum salmon in the Broughton Archipelago. Canada's most abundant and economically valuable salmon populations, as well as British Columbia's most valuable Pacific herring stock, migrate through the Discovery Islands; hence, parasite transmission from farm to wild fish in this region may have important economic and ecological implications. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Morton, Alexandra Routledge, Rick Krkosek, Martin |
author_facet |
Morton, Alexandra Routledge, Rick Krkosek, Martin |
author_sort |
Morton, Alexandra |
title |
Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
title_short |
Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
title_full |
Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
title_fullStr |
Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
title_full_unstemmed |
Sea Louse Infestation in Wild Juvenile Salmon and Pacific Herring Associated with Fish Farms off the East‐Central Coast of Vancouver Island, British Columbia |
title_sort |
sea louse infestation in wild juvenile salmon and pacific herring associated with fish farms off the east‐central coast of vancouver island, british columbia |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1577/m07-042.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/M07-042.1 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
British Columbia Canada Keta Pacific Sockeye |
geographic_facet |
British Columbia Canada Keta Pacific Sockeye |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
North American Journal of Fisheries Management volume 28, issue 2, page 523-532 ISSN 0275-5947 1548-8675 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/m07-042.1 |
container_title |
North American Journal of Fisheries Management |
container_volume |
28 |
container_issue |
2 |
container_start_page |
523 |
op_container_end_page |
532 |
_version_ |
1784253343827230720 |