FISHERY BULLETIN: VOL. 85, NO. 1 



eye - Aat-3; Ada-1; Dpep-1; Gpi-3; Gr-1; Idh-3,4; 

 Ldh-4; Ldh-5; Tapep; Mdh-1,2; Mdh-3,4; Pgm-1; 

 Pgk-2; Mpi. 



liver - Ah-4; Dpep-1; Hagh; Gpi-3; Gr-1; Idh-3,4; 

 Tapep; Ldh-4; Mdh-1,2; Mdh-3,4; Pgm-1; Pgk-2; 

 Mpi; Sod-1 (Table 2). 



Mixed Fishery Analysis 



Maximum likelihood estimates of proportionate 

 contributions of baseline populations to different 

 population mixtures were obtained by the pro- 

 cedures described in Milner et al. (fn. 4). Through 



an iterative procedure (the EM algorithm, Demp- 

 ster et al. 1977), the estimates are obtained using 

 the frequencies of genotypes in the mixtures and 

 in the baseline populations. Standard deviations of 

 indiviual and pooled estimates were based on an 

 asjonptotic variance as described in Milner et al. (fn. 

 4). These variances were found to be consistently 

 higher than empirically derived variances within the 

 sample sizes of the present study (Milner et al. fn. 

 4). The geographic range of mixed fisheries sampled 

 in this study was from the Strait of Juan de Fuca 

 southward through the mouth of the Columbia River 

 to the northern coast of Oregon (Fig. 1). 



Table 3.— Estimated proportions of stock groups and subgroups in fisheries of 1983. 



'C = commercial, I = Indian, S = Sport. 

 ^Areas are as indicated in Figure 1. 

 ^In sport fishery, dates for month are 6 = 5-29 

 9 = 9-1 only. 



6-17, 7 = 6-18 - 7-29, 9 = 8-16 - 9-11; in Columbia River commercial fishery 



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