Kendall and Picquelle Egg and larval distributions of Theragra chalcogramma 



147 



The second cohort, represented by eggs from the sec- 

 ond time interval and 3-6 mm larvae from the third 

 time interval, resulted from the period of heaviest 

 spawning activity. Most of the eggs and larvae collected 

 were in this cohort. The centroid of the eggs of this 

 cohort, in the second time interval, was in the middle 

 of Shelikof Strait, off Cape Kekurnoi (Fig. 10). Dur- 

 ing the third time interval, the centroid of larvae of 

 the second cohort (3-6 mm long) was located east of 

 Wide Bay, southwest of the centroid of eggs of this 

 cohort. In the fourth time interval, 6-9 mm larvae were 

 further to the southwest, off the south end of Kodiak 

 Island. By the fifth time interval, 9-12 mm larvae were 



near a line between Sutwik and Chirikof Islands. The 

 ellipses for this cohort of eggs and larvae expanded 

 between each successive time interval (Table 6). 



The centroid of eggs of the third cohort was found 

 in the center of Shelikof Strait, off Wide Bay (Fig. 10). 

 The centroid of this cohort as 3-6 mm larvae (during 

 the fourth time interval) was positioned at the southern 

 end of Shelikof Strait, closer to Kodiak Island than to 

 the Alaska Peninsula which was slightly south of where 

 the eggs were. In the fifth time interval the centroid 

 of this cohort as 6-9 mm larvae was between Sutwik 

 Island and the Trinity Islands. 



