Squaxin Island Tribe
Fisheries Study
Abstract
In 2002 and 2004 coho salmon smolts
released from the Squaxin Island netpens were acoustically tagged and
tracked throughout south Puget Sound. A primary research
objective was to develop ans assess acoustic tagging and tracking
methods for future large-scale studies. Experience has identified
appropriate surgery techniques and field methods for successful
deployment and recovery of submerged acoustic receivers, with high
detection probabilities. Acoustic fish detection data revealed
extensive movement within and rates of outmigration from deep south
Puget Sound. Results are being applied to ongoing research to
determine behavior and regional survival of both hatchery and wild coho
salmon smolts.
Introduction
Coho salmon populations in south Puget
Sound continue to exhibit exceptionally low rates of survival.
Speculation that releases of hatchery fish may affect food-web dynamics
and marine carrying capacity is of concern. To investigate this
possiblity, the Squaxin Island Tribe is in its third year of research
using new acoustic technology to track juvenile coho salmon throughout
South Puget Sound.
Objectives
1. Assess the feasability of tracking
coho salmon smolts throughout south Puget Sound using acoustic
technology.
2. Investigate movement behavior and determine survival of both
hatchery and wild juvenile coho salmon in SPS.
3. Foster a cooperative large-scale research approach for acoustic
tagging and tracking of multiple species throughout the Puget Sound and
ocean environments.
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