FISHERY BULLETIN: VOL. 72. NO. 3 



Table 2. — Phosphoglucomutase gene frequencies of four species of pandalid shrimp taken off Alaska, Oregon, and Washington; 



1971-72. 



Species and location 



Gene frequencies 



Sample 

 size 



df 



Test data' 



0.016 



0984 



0.010 

 0.003 



0.000 



0.980 

 0.990 



1.000 



0.059 



011 0.981 



0010 

 0.007 



0.000 



0,934 



0.008 



0.007 



0.00 



7.60 



0.00 



P>0.99 



0.1 >P>0.05 



P-.0.99 



'Chi-square test of Hardy-Weinberg distribution. 

 ^Indicates not observed in this species. 



P jordani , P boreoMs, P.goniurus 



, \ 



PGM, liiqh frequency allele 



B Bond C Bond E Band 



P gonturus 



P jordani 



P borealis 



Figure 4. — Key to five species of pandalid shrimp based 

 on three biochemical characters. 



alleles). This polymorphism may prove useful for 

 separation of breeding groups and as genetic 

 markers in shrimp culturing experiments. 



All five species could be identified based on 

 a biochemical key that was developed. 



LITERATURE CITED 



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Barr, L. 



1970. Diel vertical migration of Pandalus borealis in 

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