Freshwater and marine migration and survival of endangered Cultus Lake sockeye salmon (Oncorhynchus nerka) smolts using POST, a large-scale acoustic telemetry array

Freshwater and early marine migration and survival of endangered Cultus Lake sockeye ( Oncorhynchus nerka ) salmon were studied using the Pacific Ocean Shelf Tracking (POST) array. Smolts were acoustically tagged in 2004-2007, and their migration was recorded within the lower Fraser River and coasta...

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Bibliographic Details
Published in:Canadian journal of fisheries and aquatic sciences 2009-05, Vol.66 (5), p.736-750
Main Authors: Welch, David W, Melnychuk, Michael C, Rechisky, Erin R, Porter, Aswea D, Jacobs, Melinda C, Ladouceur, Adrian, McKinley, R. Scott, Jackson, George D
Format: Article
Language:eng ; fre
Subjects:
Aquatic sciences
Biotelemetry
Cultus
Ecologie animale et végétale
Ecologie animale, vegetale et microbienne
Ecologie appliquée
Ecosystèmes marins
Exploitation et gestion des ressources biologiques naturelles (chasse, pêche, surveillance des populations exploitées, etc.)
Fish migration
Fishes
Freshwater
Marine
Migration
Oncorhynchus nerka
Rare fishes
Salmon
Sciences biologiques et medicales
Sciences biologiques fondamentales et appliquees. Psychologie
Studies
Survival analysis
Synécologie
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Summary:Freshwater and early marine migration and survival of endangered Cultus Lake sockeye ( Oncorhynchus nerka ) salmon were studied using the Pacific Ocean Shelf Tracking (POST) array. Smolts were acoustically tagged in 2004-2007, and their migration was recorded within the lower Fraser River and coastal southern British Columbia waters. Most smolts showed rapid directional movement (swimming speeds of ~15-30 km·day -1 ). Average exit time from the Fraser River was 4.0-5.6 days after release, and average residence time within the Strait of Georgia was 25.6-34.1 days. Most individuals migrated northward, generally close to the mainland coast. Survival rates, assessed using standard mark-recapture methods, were generally high during the downstream migration (50%-70%), except in 2005 when survival was
ISSN:0706-652X
1205-7533
DOI:10.1139/F09-032