cd 



cc 



b 



c 



d 



T 



t 



Figure 3. — A. Zymogram showing PGM bands b through d (tands a and e not shown) and phenotypes cd, cc and be. B. Diagram 

 showing eight PGM phenotypes observed inPenaeus aztecus subtilis. Direction (f) of protein migration toward the anode ( + ) is shown. 



Table l. — Distribution (number of specimens) of PGM phenotypes and frequency of PGM alleles in samples ofPenaeus brasiliensis, 



P. aztecus subtilis, and P. aztecus aztecus. 



'Tip of rostrum to tip of telson. 



^Data adapted from Proctor et al. (1974). 



455 



