Patterns of covariation in survival rates of British Columbian and Alaskan sockeye salmon (Oncorhynchus nerka) stocks

We used a multi-stock comparison to identify spatial and temporal characteristics of environmentally driven sources of variability across four decades in the productivity of 29 sockeye salmon (Oncorhynchus nerka) stocks from British Columbia (B.C.) and Alaska. We examined patterns of covariation among indices of survival rate (residuals from the best-fit stock-recruitment curve) and found positive covariation among Fraser River sockeye stocks (southern B.C.) and, to a greater extent, among Bristol Bay stocks (western Alaska) but no evidence of covariation between these two regions or with stocks of other regions in B.C. and Alaska. This indicates that important environmental processes affecting variation in sockeye survival rate from spawners to recruits operate at regional spatial scales, rather than at the larger, ocean-basin scale. The observed covariation in survival rates of Bristol Bay stocks appears to be due to a combination of both freshwater and, to a greater degree, marine processes. Bristol Ba...

[1]  R. Peterman,et al.  Comparison of methods to account for autocorrelation in correlation analyses of fish data , 1998 .

[2]  Ransom A. Myers,et al.  Spatial scales of interannual recruitment variations of marine, anadromous, and freshwater fish , 1997 .

[3]  J. Wallace,et al.  A Pacific Interdecadal Climate Oscillation with Impacts on Salmon Production , 1997 .

[4]  C. M. Neville,et al.  Production of Fraser River sockeye salmon (Oncorhynchus nerka) in relation to decadal-scale changes in the climate and the ocean , 1997 .

[5]  R. Peterman,et al.  Alternative models of climatic effects on sockeye salmon, Oncorhynchus nerka, productivity in Bristol Bay, Alaska, and the Fraser River, British Columbia , 1996 .

[6]  K. Shortreed,et al.  Juvenile sockeye rearing capacity of three lakes in the Fraser River system , 1996 .

[7]  D. Ware.  A century and a half of change in the climate of the NE Pacific , 1995 .

[8]  M. Bradford.  Comparative review of Pacific salmon survival rates , 1995 .

[9]  C. Wood,et al.  Evaluation of the Depensatory Fishing Hypothesis as an Explanation for Population Cycles in Fraser River Sockeye Salmon (Oncorhynchus nerka) , 1994 .

[10]  N. Graham.  Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s: observations and model results , 1994 .

[11]  Richard J. Beamish,et al.  Climate and exceptional fish production off the West Coast of North America , 1993 .

[12]  R. Beamish,et al.  Pacific salmon production trends in relation to climate , 1993 .

[13]  E. L. Brannon,et al.  Ocean Ecology of North Pacific Salmonids , 1993 .

[14]  C. Walters.  A Partial Bias Correction Factor for Stock–Recruitment Parameter Estimation in the Presence of Autocorrelated Environmental Effects , 1990 .

[15]  R. Peterman,et al.  Experimental Harvest Policies for a Mixed-Stock Fishery: Fraser River Sockeye Salmon, Oncorhynchus nerka , 1990 .

[16]  F. Page,et al.  Detecting synchrony of recruitment using short, autocorrelated time series , 1989 .

[17]  Carl J. Walters,et al.  Is Research on Environmental Factors Useful to Fisheries Management , 1988 .

[18]  Randall M. Peterman,et al.  Preseason Forecasts of Sockeye Salmon (Oncorhynchus nerka): Comparison of Methods and Economic Considerations , 1988 .

[19]  D. Cayan,et al.  Climate and Chlorophyll a: Long-Term Trends in the Central North Pacific Ocean , 1987, Science.

[20]  W. Silvert,et al.  Recruitment to northwest Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) stocks : influence of stock size and climate , 1987 .

[21]  D. Noakes,et al.  Quantifying Changes in British Columbia Dungeness Crab (Cancer magister) Landings Using Intervention Analysis , 1986 .

[22]  R. Peterman.  Nonlinear Relation Between Smolts and Adults in Babine Lake Sockeye Salmon (Oncorhynchus nerka) and Implications for Other Salmon Populations , 1982 .

[23]  W. Ricker.  Computation and interpretation of biological statistics of fish populations , 1977 .

[24]  W. Ricker.  Review of the Rate of Growth and Mortality of Pacific Salmon in Salt Water, and Noncatch Mortality Caused by Fishing , 1976 .

[25]  D. G. Watts,et al.  Spectral analysis and its applications , 1968 .