FISHERY BULLETIN: VOL. 70. NO. 2 



Figure 4. — Bands in starch-gel illustrating the various phenotypes of Peptidase A de- 

 tected in the family Scorpaenidae. The following species are shown: 1 Helicolenus 

 dactylopterus (IP, I^), 2 Sebastes caurinus (11^, Ic), 4 Sebastes variegatus (IP, Ja), 

 5 Sebastologus alascaniis (11^' ^ jb)^ 6 Sebastes diploproa (IP, P), and 7 Sebastes aurora 

 (lid, lb). 



aurora and band IP in S. diploproa. Band IP was 

 found in both Atlantic Sebastes species, and 

 Helicolenus dactylopterus possessed band IP. 

 Two bands representing the extremes of pepti- 

 dase A-II mobilities — IP and IP — ^were ex- 

 pressed in all Sebastolobus alascanus individuals 

 tested. These bands are presumed to be fixed 

 rather than polymorphic because of their invar- 

 iant expression and may reflect gene duplication. 



PHOSPHOGLUCOMUTASE (PGM) 



PGM polymorphism was reported in Sebastes 

 alutus, where two allelic bands — A and B — were 

 described (Johnson, Utter, and Hodgins, 1971). 

 In extending these observations here to addition- 

 al scorpaenid species a third band — A' — has also 

 been found which migrates somewhat faster 

 than the A band (Figure 5). 



PGM is the most polymorphic of the scorpae- 

 nid enzymes that we have investigated (Table 

 3). In Pacific Sebastes polymorphism was 

 found in 10 species for the A and B bands and 

 in 1 species for the A and A' bands. Twelve 

 species of Pacific Sebastes were monomorphic 

 for the A band, one for the B band, and one for 

 the A' band. In other scorpaenid species, Se- 

 bastes marinus was polymorphic for the A and B 

 bands, and S. viviparous was monomorphic for 



«JW.-. 



A' 



A 



B 



Origin 



Figure 5. — Bands in starch-gel illustrating three mobil- 

 ities of phosphoglucomutase detected in the family Scor- 

 paenidae. The following species are shown: 1, 4 

 Sebastolobus alascanus (A') , 2, 5 Sebastes caurinus (A) , 

 and 4, 6 Sebastes reedi (B). 



the A band. H. dactylopterus was polymorphic 

 for the A and B bands, and Sebastolobiis alas- 

 canus was monomorphic for the A' band. We 

 assume that these variants reflect allelic diff"er- 

 ences although further study is needed for some 

 species. Also, the limited number of samples 



408 



