16 



Fishery Bulletin 94(1), 1996 



males of 150-190 mm ML represented the Novem- 

 ber month class. 



During September, fall-hatched squid still pre- 

 dominated in catches. There were twice as many 

 October-hatched females in September than in Au- 

 gust. September- and October-hatched maturing fe- 

 males of 240-270 mm ML (age: 340-370 d) occurred 

 in great numbers. Immature December-January 

 hatched females and males of 150-210 mm ML com- 

 posed up to 15% of the total catches. Mature males 

 of 210-240 mm belonged mainly to September-Oc- 

 tober hatched squid. Juveniles of 20^40 mm ML were 

 June-hatched, whereas larger ones (60-120 mm ML) 

 belonged to March-May month classes. 



Navarin-Olyutorsky region Age structure of B. 

 magister in the Navarin-Olyutorsky region (Fig. 10) 

 in June was somewhat different from that in 

 Olyutorsky Bay (Table 4). During the first half of 



June, 9 month classes for females and only 5 month 

 classes for males were observed. One-third of females 

 (250-360 mm ML, 380-460 d) had mated and be- 

 longed to February-May month classes. The major- 

 ity of the catches were represented by summer- 

 hatched females (maturing specimens of 210-240 mm 

 ML, 300-320 d) and mature specimens (240-340 mm 

 ML, 330-370 d). Among males, summer-hatched in- 

 dividuals were most abundant (220-250 mm ML, 

 320-340 d). Immature males, and females (160-190 

 mm ML, 260-280 d) belonged to the September 

 month class. Juveniles caught in considerable num- 

 bers were from late fall (90-120 mm ML), winter (40- 

 80 mm ML), and spring (26-37 mm ML) hatching. 

 In the second half of June, maturing and mature 

 squids from the summer hatch still predominated 

 for catches of both males and females. However, the 

 proportion of fall-hatched squid approximately 

 doubled. 



