HOSIF and HORTON: BIOLOGY OF REX SOLE 



FIGURE 10. — Diagrammatic representation of peptidase 

 phenotypes in starch gel from 137 rex sole collected off Oregon, 

 April 1973. 



TABLE 10. — Frequencies of peptidase anodal zone II phenotypes 

 in 137 rex sole collected off Astoria, Charleston, and Brookings, 

 Oreg., in April 1973. 



'An additional two rex sole from the Astoria sample and six fish from the 

 Brookings sample did not develop distinct patterns and hence are not included. 



Charleston (central), or Brookings (southern) 

 Oregon (Tables 9-11). These data are insufficient 

 to warrant extended speculation. However, they 

 suggest that geographic selection or variation in 

 rex sole off Oregon, if any, may not revolve around 

 the genetic system included in the eight systems 

 tested. Other alternatives, such as testing ad- 

 ditional genetic systems or possible use of hel- 

 minth parasites as biological tags, should be 

 investigated to provide a more extensive evalua- 

 tion of the population structure of rex sole off 

 Oregon as a possible adjunct to effective man- 

 agement decisions. 



ACKNOWLEDGMENTS 



Financial support was provided by the Fish 

 Commission of Oregon (now Oregon Department 

 of Fish and Wildlife [ODFW]). James Meehan, 

 Gerald Lukas, Bill Barss, Edwin Niska, Jack 

 Robinson, Robert Demory, and Brent Forsberg (all 

 ODFW) helped collect and tag rex sole. Paul Reed 



ORIGIN 



A'A AA AB 



PGM PHENOTYPES 



BB 



FIGURE ll. — Diagrammatic representation of phospho- 

 glucomutase (PGM) phenotypes in starch gel from 145 rex sole 

 collected off Oregon, April 1973. 



TABLE 11. — Frequencies of phosphoglucomutase (PGM) 

 phenotypes in 145 rex sole collected off Astoria, Charleston, and 

 Brookings, Oreg., in April 1973. 



(ODFW) provided spawning data on northern 

 California rex sole. Allyn Johnson (National 

 Marine Fisheries Service) conducted the elec- 

 trophoretic analysis. The assistance of Rudy 

 Lovvold of the MV Sunrise, and Thomas Oswald 

 and Olaf Rockness of the RV Commando is ap- 

 preciated. W. G. Pearcy (Oregon State Universi- 

 ty), S. J. Westrheim (Canada Department of the 

 Environment), and Robert Loeffel (ODFW) 

 criticized the manuscript. 



LITERATURE CITED 



Alton, M. S. 



1972. Characteristics of the demersal fish fauna inhabiting 

 the outer continental shelf and slope off the northern 

 Oregon coast. In A. T. Pruter and D. L. Alverson (editors), 

 The Columbia River estuary and adjacent ocean waters, p. 

 583-634. Univ. Wash. Press, Seattle. 

 ALVERSON, D. L., A. T. PRUTER, AND L. L. RONHOLT. 



1964. A study of demersal fishes and fisheries of the 



59 



