Accession Number : AD0767521

Title :   The Influence of Hydrologic Conditions on the Distribution of Baleen Whales in the Antarctic (Raspredelenie Usatykh Kitov v Anarktike v Zabisimosti ot Gidrologicheskikh Uslovii),

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C

Personal Author(s) : Chernyi,E. I.

Report Date : 1973

Pagination or Media Count : 13

Abstract : Efficient whale hunting depends upon knowing where whale concentrations can be found. Baleen whale gather where their principal food (euphausiids) is plentiful. The Antarctic Convergence Zone is a consistently poor whaling area because cold Antarctic water plunges beneath warmer Sub-Antarctic water, inhibiting the growth of euphausiids. The best whaling regions are where the Antarctic Coastal and Circumpolar Currents meet. These are regions where a semistationary cyclonic system coincides with plankton rich waters upwelling from great depths. Whales locate these feeding grounds through salinity-sensing organs which direct them normal to surface water isohalines in search of the narrow range of salinity most favorable to plankton growth. They also travel parallel to isohalines to remain in the feeding grounds. (Author)

Descriptors :   (*CETACEA, DISTRIBUTION), (*HYDROLOGY, CETACEA), ANTARCTIC REGIONS, PLANKTON, SALINITY, OCEAN CURRENTS, USSR

Subject Categories : Biology

Distribution Statement : APPROVED FOR PUBLIC RELEASE