Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 4460
Title: Do chemically contaminated river estuaries in Puget Sound (Washington, USA) affect the survival rate of hatchery-reared Chinook salmon?
Author: J. P. Meador
Publication Year: 2014
Journal: Canadian Journal of Fisheries and Aquatic Sciences
Volume: 71
Issue: 1
Pages: 162-180
DOI: 10.1139/cjfas-2013-0130
Keywords: salmon,Contaminants,survival,estuaries,Puget Sound,toxicity
Abstract:

This study examined the rate of survival for hatchery-reared, ocean-type juvenile Chinook salmon (Oncorhynchus tshawytscha) to the adult life stage in relation to contamination status for estuaries where they temporarily reside. The hypothesis tested here is that juvenile Chinook from Puget Sound (Washington, USA) area hatcheries exhibit differential survival as categorized by the state of contamination in their respective natal estuaries. Data were examined from 20 hatcheries that released fish to 14 local estuaries in the Greater Puget Sound area over 37 years (1972–2008). A parallel analysis was also conducted for coho salmon (Oncorhynchus kisutch) outmigrating from many of the same hatcheries. For all years combined, juvenile Chinook transiting contaminated estuaries exhibited an overall rate of survival that was 45% lower than that for Chinook moving through uncontaminated estuaries, which was confirmed when tested year by year. The results for coho originating from the same hatcheries and sharing a similar marine distribution indicated no substantial differences among estuaries. These observations have important implications for wild juvenile Chinook that spend more time in the estuary compared with hatchery-reared fish.

Full Text URL: http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0130
Theme: Recovery, Rebuilding and Sustainability of Marine and Anadromous Species
Foci: Develop methods to use physiological and biological information to predict population-level processes.
Describe the relationship among human activities and species stock status, recovery, rebuilding and sustainability.
Official Citation:

Meador J.P.  2014.  Do chemically contaminated river estuaries in Puget Sound (Washington, USA) affect the survival rate of hatchery-reared Chinook salmon?  Canadian Journal of Fisheries and Aquatic Sciences 71(1) 162-180.