Haul by haul Chilean and Argentinian data show that fishing forDissostichus eleginoides in 1994/95 took place in two major fishing grounds, West of Shag Rocks (Wshag) and North-West of South Georgia (NWSG). In March there was a high proportion of large females at Wshag (72%) but a nearly equal proportion of males and females at NWSG. It is suggested that a strong influx of small fish at Wshag in April reduced the mean length in the catch and increased CPUE (numbers of fish per hook), although sex ratio remained biassed in favour of females. Similar changes in mean length and CPUE were not seen at NWSG, although the sex ratio did change in favour of males (60% male by early May). The changes at Wshag are hypothesised to be the result of a prespawning migration of sub-adults, especially males, from shallow waters to deeper spawning grounds just prior to spawning in June-July

Ichthyoplankton samples were obtained during the Italian Antarctic Oceanographic Cruise carried out in the western Ross Sea in November-December 1994. The present study focused on improvement of the knowledge of the larval fish community in relation to its distribution and relative abundance. A midwater trawl (Hamburg Plankton Net) was used to collect samples at 26 stations. Larval and juvenile specimens of twentyone species belonging to six families (Artedidraconidae, Bathydraconidae, Channichthyidae, Macrouridae, Nototheniidae and Paralepididae) were collected from surface to 380 m depth. Mean relative abundance of larval fish in the whole area was about 2.7 specimens / 1000 m3 of sea water filtered. The upper 100 m of the water column showed the greatest species diversity and abundance. Postlarvae and juveniles of Pleuragramma antarcticum were the most abundant, followed by larval and postlarval specimens of Chionodraco sp. It was noteworthy the high number of Trematomus lepidorhinus (570 larvae) found in a single station off Terra Nova Bay. Our data give evidence of a great species diversity of the larval fish community in the western Ross Sea and show a greater abundance of fish larvae in inshore than in offshore waters.

This study was based on the data from the ichthyoplankton survey made in March-April 1989 by R/V "Vozrozhdenie" in the subtropical frontal zone over the South Atlantic ridge crest between 38°30’ - 45°S. and 15° - 20°W. Larvae were collected with BONGO and JUDAY nets in oblique arid vertical hauls at 500 - 0m. The method of delta-distribution of random values (Aitchison, Brown, 1957; Pennington, 1983) was used to count the larvae. The data obtained was taken to estimate the recruitment biomass (fish aged up to 1 year) in this species for the area of 87750 square miles studied. The abundance of larvae in this area was 4.3 x 10 ind., while the biomass of one year old fish obtained was 10750 tons. A whole chain of similar reproductive grounds is assumed to exist in the notal zone of the Atlantic and other sectors of the South Ocean to be able to sustain a large biomass of E. carlsbergi in waters of the south po1ar frontal zone.