< 3940-4950-5960-6970-79 80-89 90-9900-109110-119 XI9 

 DEPTH (FATHOMS) 



Figure 12,--Average catch per 30 minutes fished by 

 depth for Pandalopsis dispar taken by Gulf shrimp 

 trawl. 



SUMMARY 



Eighteen exploratory shrimp cruises were 

 made in the waters of the northeastern Pacific 

 by the Bureau of Commercial Fisheries in 

 1950-60. The principal gear used were beam 

 trawls and Gulf of Mexico shrimp trawls. 



Along the Oregon-Washington coast, Pan- 

 dalus jordani was the dominant species. Best 

 catches were made in 60 to 109 fathoms. 

 Other species taken included: Pandalopsis 

 dispar, north of Manhattan Beach, Oreg.; 

 Pandalus platyceros north of Lapush, Wash.; 

 and p. hypsinotus in the Strait of Juan de Fuca. 



Throughout Southeastern Alaska, P. borealis 

 is the most abundant species, followed by 

 Pandalopsis dispar. Highest availability was 



found between 30 and 70 fathoms. Other spe- 

 cies found in the Southeastern Alaska area 

 were Pandalus jordani, Pandalopsis dispar, P. 

 hypsinotus, and P. platyceros. 



In central Alaska, P. borealis was also the 

 dominant species. Highest catches were made 

 between 30 and 119 fathoms. Other species 

 taken were Pandalopsis dispar, Pandalus hyp- 

 sinotus, and P. platyceros. P. platyceros was not 

 taken west of Port Dick, Alaska. 



In the Shumagin Islands-Alaska Peninsula 

 area, P. borealis was again the dominant spe- 

 cies, with the highest availability occurring 

 between 40 and 79 fathoms. Other species 

 occurring in this area were Pandalopsis dispar 

 and Pandalus hypsinotus. 



P. jordani, the most abundant species off 

 Washington and Oregon, was taken from off 

 the Coquille River, Oreg., to Southeastern 

 Alaska with the highest availability occurring 

 off Washington. P. borealis was found from 

 Southeastern Alaska to the Alaska Peninsula, 

 and it was the most abundant species taken 

 off Alaska. Catch rates were highest in the 

 Alaska Peninsula-Shumagin Islands area, 

 Pandalopsis dispar was taken from Manhattan 

 Beach, Oreg., to the Alaska Peninsula. Al- 

 though the abundance of P. dispar does not 

 compare with Pandalus jordani or P. borealis, 

 it is available in commercial quantities, and 

 good catches were made from Cook Inlet to 

 the Pye Islands of central Alaska. P- hypsinotus, 

 taken from the Strait of Juan de Fuca to the 

 Alaska Peninsula, and P. platyceros, taken from 

 off Lapush, Wash,, to Port Dick, Alaska, were 

 never found in large concentrations. Adult 

 populations appear to be most abundant in 

 rocky areas where they are not fishable by 

 trawls. 



LITERATURE CITED 



Mc- 



ALVERSON, DAYTON L., RICHARD L. 

 NEELY, and HAROLD C. JOHNSON. 

 1960. Results of exploratory shrimp fishing 

 off Washington and Oregon (1958). U.S. 

 Fish and Wildlife Service, Commercial 



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