Arctic Ocean Chuckchi Sea August 1953-1954 Zooplankton vertical stratified collections on board of the Russian R/V Lomonosov, program ANII A-65

Zooplankton collections were made to investigate assess interannual changes in
species composition, abundance and distribution of the zooplankton in the
Chuckchi Sea, one of the biologically lesser known areas of the Arctic.
Vertical stratified tows (0-10 m, 10-25 m and 25 m; bottom) were done with a
Nansen net (0.5 m diameter, 333 micrometer mesh) at 21 stations in August of
1953 and August of 1954. The ship that was used is R/V/ Lomonosov;
geo-referencing of stations was done. Temperature, salinity and oxygen
concentrations were measured at each depth layer. Total zooplankton abundance
and biomass in the southern Chuckchi Sea were dominated by North Pacific
species (e.g. Metridia pacifica, Eucalanus bungii, Neocalanus plumchrus) and
they were higher in 1954 then in 1953, indicating a substantial push of the
Bering Sea water onto the Arctic shelf. Pecularities of Russian name
translations into English and fieldwork in Russian waters in the mid-1950
should be considered when analyzing these data.

The purpose of the dataset is to assess late summer species composition,
abundance and distribution of the zooplankton of the Chuckchi Sea for the years
1953-1954.