Distribution and morphological features of the antarctic species of CALANUS and The euphausiid fauna of the antarctic and notal regions; 1955-02-22 to 1958-06-17 (NCEI Accession 0000922)

This data contains abundance, length, and life history data of four species of Calanus copepods. The data is a compilation of 3 cruises of the MV OB carried out by the Soviet Antarctic Expedition during the IGY (1955-1958). The surveys paid close attention to obtaining complete data on the populations and distribution of the adult stages of Copepoda. Two types of plankton nets were used; Juday net with mesh size No. 38 and the K100 net with mesh size No. 9 in the cylindrical part, No. 15 in the upper part and No. 23 or 38 in the lower part of the net. This paper also includes excellent cruise and Calanus abundance maps as well as extensive station information.

This data is a summary of three cruises of the MV OB by the Soviet Antarctic Expedition. The article summarizes the distribution of euphausiid species and includes maps of their distribution based on collections of the OB and published data. The euphausiids were mainly sampled with a K100 net: 100 cm diameter, cylindrical part with No. 9 mesh, conical part with No. 15 mesh in the upper part and No. 23 or 38 in the lower part. A few other samples were taken with a Nansen net(50 cm diameter, cylindrical part No. 15 mesh, conical part No. 23 mesh), a Juday plankton net, a Bogorev-Rass net, or a ring-trawl. Most of the samples were taken by oblique hauls.