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NOAA Fisheries Northwest Science Center Publication Details

CitationJesse Lamb,Benjamin Sandford,Steven Smith,Ross Gleason,Amber Barenberg,Aimee Fullerton 2025. Monitoring the Migrations of Wild Snake River Spring/Summer Chinook Salmon Juveniles: Survival and Timing, 2024.
TitleMonitoring the Migrations of Wild Snake River Spring/Summer Chinook Salmon Juveniles: Survival and Timing, 2024
Publication Year2025
Date04/02/2025
Keywordschinook salmon, spring-run chinook, stream, wild salmon, idaho, in-stream detection, pit tag, summer-run chinoook, natural production, natal stream, lower granite dam, electro-fishing, parr, salmon river, chinook, salmon survival, pit tagging
AbstractDuring 2023-2024, we continued a long-term research project to monitor the migration behavior and survival of wild juvenile spring/summer Chinook salmon Oncorhynchus tshawytscha in the Snake River Basin of Idaho. Wild parr were collected in natal tributaries, implanted with passive integrated transponder (PIT) tags, and released near their respective collection sites. In this report, we present data and analyses from detections of fish tagged in summer 2023 and monitored through spring 2024. Comprehensive detail on fish collection and tagging is described in our report of October 2023, Monitoring the migrations of wild Snake River spring/summer Chinook salmon juveniles: Fish collection and tagging, 2023. Our analyses included estimates of survival from release to instream monitoring systems and from monitoring systems to Lower Granite Dam. These estimates are summarized in Table 1 for populations from three Idaho streams with PIT-tag monitoring systems. For the remaining two population