LIN and WILLIAMS: INFLUENCE OF SMOLT ON ADULT SALMON 



tween the adult production and the number of chum 

 salmon fry released in Hokkaido. Also, as the num- 

 ber of fry increases, the variability in adult produc- 

 tion increases as well. The results reported by 

 McCarl and Rettig (1983), using the Just-Pope 

 specification (a special case of extended Box-Cox), 

 conclude that the hypothesis of density indepen- 

 dence fails to be rejected and the effect of the 

 number of fry on the variability of adult production 

 is more than twice that of this study. The Box-Cox 

 results of aggregated Oregon coho salmon also in- 

 dicate density dependence, and the same conclusion 

 is also reached by McCarl and Rettig (1983) and 

 Peterman and Routledge (1983). Because Nickelson 

 (1986) reached a different conclusion using disag- 

 gregated data, the use of the extended Box-Cox 

 specification to analyze disaggregated data for 

 Oregon coho salmon is, therefore, recommended by 

 the authors as a possible research need. However, 

 partitioning the data set according to high and low 

 upwelling, for example, will lead to the problem of 

 insufficient degrees of freedom, as pointed out by 

 an anonymous reviewer. This can be overcome only 

 after a sufficient number of years of data collection 

 have transpired. Finally, data reliability needs to be 

 secured before the selection of functional form can 

 improve our understanding of this issue. 



ACKNOWLEDGMENTS 



This work is the result of research sponsored 

 by the Alaska Sea Grant College Program, coop- 

 eratively supported by the U.S. Department of 

 Commerce, NOAA Office of Sea Grant and Extra- 

 Mural Program, under grant number NA86AA- 

 D-SG041, project number R/14-09; and by the 

 University of Idaho with funds appropriated by the 

 state. 



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