Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys

Acoustic surveys carried out in summer and autumn periods of 1987-1989 estimated the biomass of myctophids in the Atlantic sector of the Southern Ocean over the region between 48° and 56°S and from 8° to 48W at about 1.7 mill.t. Over the larger part of the surveyed area the fish were sparse, their dense concentrations composed predominantly of one myctophid species Electrona carlsbergi occurred over only restricted areas. The bulk of the biomass has been reported from the region of the Antarctic Convergence.