Event Title

Juvenile Life History Strategies of Selected Chinook Salmon Spawning Populations within Puget Sound and the Columbia River, as Inferred From Otolith Microchemistry

Presentation Abstract

Growing evidence suggests juvenile Chinook salmon (Oncorhynchus tshawytscha), can utilize portions of both freshwater and salt water components of estuaries before full seaward migration. However a clear link between juvenile outmigration strategies (early fry, late parr) and successful returning adults has not been made. To test the hypothesis that early migrants (and potentially estuary rearing juveniles) contribute to adult populations, we recovered adult otolith samples on the spawning grounds of selected Salish Sea and Columbia River tributaries. Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) was used to analyze chemical patterns in otoliths. Otolith microchemistry was used to estimate the size and timing of juvenile outmigration for selected adult populations. Furthermore residency within the freshwater portion of the Columbia River estuary was estimated based on recoveries of strontium chloride marked adult otoliths from the Coweeman River.

Session Title

Session S-09D: Salmon Recovery: Implementation and Progress II

Conference Track

Species and Food Webs

Conference Name

Salish Sea Ecosystem Conference (2014 : Seattle, Wash.)

Document Type

Event

Start Date

2-5-2014 10:30 AM

End Date

2-5-2014 12:00 PM

Location

Room 611-612

Contributing Repository

Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.

Rights

This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.

Type

Text

Language

English

Format

application/pdf

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May 2nd, 10:30 AM May 2nd, 12:00 PM

Juvenile Life History Strategies of Selected Chinook Salmon Spawning Populations within Puget Sound and the Columbia River, as Inferred From Otolith Microchemistry

Room 611-612

Growing evidence suggests juvenile Chinook salmon (Oncorhynchus tshawytscha), can utilize portions of both freshwater and salt water components of estuaries before full seaward migration. However a clear link between juvenile outmigration strategies (early fry, late parr) and successful returning adults has not been made. To test the hypothesis that early migrants (and potentially estuary rearing juveniles) contribute to adult populations, we recovered adult otolith samples on the spawning grounds of selected Salish Sea and Columbia River tributaries. Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) was used to analyze chemical patterns in otoliths. Otolith microchemistry was used to estimate the size and timing of juvenile outmigration for selected adult populations. Furthermore residency within the freshwater portion of the Columbia River estuary was estimated based on recoveries of strontium chloride marked adult otoliths from the Coweeman River.