RHINCALANUS GIGAS 351 



At Sts. 1 148, 1 150 and 1152, in the East Wind Drift current, we find a population, 

 spawned in South Atlantic water to the east, probably in the middle of summer. This is 

 a population which corresponds with that found in January 1932 at Sts. 816 and 817 in 

 stage iv (p. 332). The fact that in March 1933, farther east, it was found only as far 

 advanced as stage v points to a somewhat later spawning of this stock than was 

 indicated in the previous season. 



The i-m. net was used at one station on the line from the ice edge to South Africa at 

 the end of March 1933. This station (i 161) was taken just south of the convergence be- 

 tween the pack-ice edge in the Weddell Sea and South Africa. A summer generation 

 was found here in stage v, with adults in the lower net. The majority of the catch was in 

 the lower net. 



SUMMARY, FALKLAND SECTOR, SEASON 1932-3 



1. The over- wintered stock appeared within the range of the nets at the end of 

 October 1932 in stages iv, v and vi. Stage vi (adults) were particularly abundant north 

 of the convergence (p. 341). 



2. In the eastern Drake Passage and western Scotia Sea the population in November 

 was in stages v and vi. From the end of November until the end of December the 

 stock was everywhere mature in water of Bellingshausen Sea origin (p. 345). 



3. In the "oldest" water of Weddell Sea origin at the end of November and beginning 

 of December the population was in stage v, while at stations in Weddell Sea water with 

 an average temperature below 0° C. the stock consisted of adults with no young stages. 

 The population in the "oldest" Weddell Sea water (o-i-o° C.) is presumed to have a 

 mixed origin and to belong partly to the Weddell Sea current and partly to the Bellings- 

 hausen Sea current. Thus, as in the previous season, the part of the population which 

 belonged to the Bellingshausen Sea current had apparently failed to reach maturity at 

 the same time as the stock in the Bellingshausen Sea itself (p. 343). 



4. Spawning in the South Georgia region is thought to have taken place earlier in 

 the season 1932-3 than in 193 1-2, in view of the earlier attainment of maturity by the 

 population and the earlier appearance of adult males. Spawning was not apparent from 

 the catches, however, during December, and there were no observations for January 



(P- 345)- 



5. In the Drake Passage in February a summer generation in stages iv and v was found 



in the colder waters. In the warmer waters there was an older summer stock in stages v 

 and vi. It was concluded from this that spawning had taken place earlier in the warmer 

 Antarctic waters near the convergence than in the colder Antarctic waters farther south. 



(P- 346)- 



6. Between the Falklands and South Georgia in the second half of February two dif- 

 ferent stocks were again found in Antarctic waters — a younger one in stages iii and iv in 

 the colder water near South Georgia and an older one in stages iv, v and vi in warmer 

 water farther west near the convergence (p. 348). 



7. In the Weddell Sea in March, again, two different stocks were found. In water 



