HINCKLEY: REPRODUCTIVE BIOLOGY OF WALLEYE POLLOCK 



\v. 







N 

 N N 



^ 



U N N 

 N 



N KT 



\ 



N 



N 



JJ 



u u s is S 



N N 

 N 



N 







^ 



^ 



61 OON 



 56 OON 



51 OON 



179 ODE 



176 OOW 



171 OOW 



166 OOW 



161 OOW 



Figure 5. — Locations of cells containing walleye pollock from spawning concentrations with growth rates similar to 

 "northern" (N), "southern" (S), or "unknown" (U) groups of Lynde et al. (text footnote 2). 



Traynor^). The great increase in fecundity, seen 

 in fish larger than 60 cm, resulted in the observed 

 curvilinear relationships found in the other 

 areas. 



Length-Weight Relationship 



The multiple range test results on the length- 

 weight relationship for walleye pollock were in- 

 conclusive (Table 3). The hypothesis that the 

 length-weight relationship was the same in all 

 areas was rejected (F = 3.4156, 0.0025 < P < 

 0.005), but the slopes of the regression lines did 

 not differ significantly. A test of intercept equal- 



submitted to the annual meeting of the International North 

 Pacific Fisheries Commission, 1983. Far Seas Fisheries Re- 

 search Laboratory, Japan. 



''^J. Traynor, Northwest and Alaska Fisheries Center, Na- 

 tional Marine Fisheries Service, NOAA, 7600 Sand Point Way 

 N.E., Seattle, WA 98115, pers. commun. 1984. 



Figure 6. — Observed and predicted relationships between fe- 

 cundity and length for walleye pollock from four areas within 

 the Bering Sea. Triangles indicate the number of oocytes per 

 sampled fish. 



1750 -1 



1500 



§ 1250 



CO 



a 1000 



< 



V) 



13 

 O 



X 



o 



750 - 



500 



250 



I / K SLOPE 



ALEUriAII SWIN 





30 40 50 60 70 80 90 



LENGTH (CM) 



491 



