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Climate variability and marine survival of coho salmon(Oncorhynchus kisutch) in the Oregon Production Area

Citation

Koslow, JA and Hobday, AJ and Boehlert, GW, Climate variability and marine survival of coho salmon(Oncorhynchus kisutch) in the Oregon Production Area, Fisheries Oceanography, 11, (2) pp. 65-77 . ISSN 1054-6006 (2002) [Refereed Article]

DOI: doi:10.1046/j.1365-2419.2002.00187.x

Abstract

Time series of adult recruitment for natural runs of coho salmon from the Oregon coastal region (1970-94) and marine survival of hatchery-reared coho salmon from California to Washington (1960-94) are significantly correlated with a suite of meteorological and oceanographic variables related to the biological productivity of the local coastal region. These variables include strong upwelling, cool sea surface temperature (SST), strong wind mixing, a deep and weakly stratified mixed layer, and low coastal sea level, indicating strong transport of the California Current. Principal component analysis indicates that these variables work in concert to define the dominant modes of physical variability, which appear to regulate nutrient availability and biological productivity. Multiple regression analysis suggests that coho marine survival is significantly and independently related to the dominant modes acting over this region in the periods when the coho first enter the ocean and during the overwintering/spring period prior to their spawning migration. Linear relationships provided good fits to the data and were robust, capable of predicting randomly removed portions of the data set.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Hobday, AJ (Dr Alistair Hobday)
ID Code:35437
Year Published:2002
Web of Science® Times Cited:53
Deposited By:TAFI - Zoology
Deposited On:2005-08-10
Last Modified:2011-10-04
Downloads:0

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