During a cruise of the fishing vessel m/t "Sagitta" around the Antarctic, the occurrence of DSL was noted in a small area of the Pacific sector of the Antarctic waters. The layers were found at depths of 50—150 m. Their main component was E. carlsbergi (family Myctophidae), whose maximum density was within the range of 219—437 x 10 -4 fish/m3.

232 specimens of Notothenia coriiceps neglecta and 578 specimens of Notothenia rossi marmorata were collected in the region of Admiralty Bay during the period from March to December 1977. The age of the fish was determined from scales. Length — weight relationship was calculated for both species. The parameters of the von Bertalanffy equation were calculated for Notothenia coriiceps neglecta, whereas mean lengths for Notothenia rossi marmorata were given according to the particular age groups.

Analysis of food contents of 784 stomachs was made in 5 species of fishes of the family Nototheniidae: Notothenia coriiceps neglecta. Notothenia rossi marmorata, Notothenia nudifrons, Trematomus newnesi and Pleuragramma antarcticum. In the food of the first two of the mentioned species benthic forms predominated and among them Amphipoda were a decidedly preferred component. The composition of the food of N. nudifrons indicates that they feed at the bottom of the sea, the most preferred component of their diet, however, were pelagic Salpae. T. newnesi and P. antarcticum are characterized by a typically pelagic kind of food. The comparison of food composition and the values of the stomach fullness indices in N. coriiceps neglecta, N. rossi marmorata and T. newnesi in the summer and winter seasons shows a markedly higher feeding intensity in the summer.