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Survey of Juvenile Salmon in the Marine Waters of Southeastern Alaska, May–October 1999
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2000
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Series: NMFS-NPAFC Doc. 497
[PDF-1.64 MB]
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Description:Studies on the early marine ecology of Pacific salmon (Oncorhynchus spp.) require adequate time series of biophysical data to relate climate fluctuations to the distribution, abundance, and production of salmon in Alaska. Because salmon are keystone species and constitute important ecological links between marine and terrestrial habitats, fluctuations in the survival of this important living marine resource have broad ecological and socio-economic implications for coastal localities throughout the Pacific Rim. Increasing evidence for relationships between Pacific salmon production and shifts in climate conditions has renewed interest in processes governing their year-class strength (Beamish 1995). In particular, variations in climate have been associated with ocean production of salmon during El Niño and La Niña events. For example, recent warming trends have benefitted most wild and hatchery stocks of Alaskan salmon. However, a number of research areas are lacking information: 1) specific links between salmon production and climate variability are poorly understood because past research has not provided adequate time-series data (Pearcy 1997); 2) it is unknown how inter- and intra-specific competition of increasing numbers of Alaskan salmonids have affected the marine carrying capacity of the region; and 3) the presence of mixed stocks with different life history characteristics has confounded attempts to accurately assess growth, survival, distribution, and migratory rates of specific stocks.
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Rights Information:Public Domain
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Compliance:Library
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