Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 1888
Title: Spatial and temporal patterns of growth and consumption by juvenile spring/summer Chinook salmon Oncorhynchus tshawytscha
Author: P. M. Chittaro, Richard W. Zabel, Kerri Haught, Beth L. Sanderson, Brian P. Kennedy
Publication Year: 2014
Journal: Environmental Biology of Fishes
Volume: 97
Issue: 12
Pages: 1397-1409

Somatic growth is often used as a metric of habitat quality, but such an approach has limitations because growth results from complex interactions between abiotic and biotic factors.  In this study, we derived estimates of weekly growth (based on otolith growth increments) across several months for four populations of threatened Chinook salmon, Oncorhynchus tshawytscha, from the Salmon River Basin, Idaho, USA.  Although mean stream temperature varied by 2-5°C across populations, growth across the season did not vary significantly by population.  To investigate this further, we applied a bioenergetics model that produced estimates of consumption rates. 

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