Complexity of direct determination o£ production intensity obliges the investigators to use indirect methods.In this work the method of calculation is based on the estimate of winter biogenous matter accumulation decrease in the upper layer,comparatively with underlayer,in summer period.
The calculation showed considerable interannual changeability of production intensity,having the indications of three-year cyclicity:production maxima were noted in 1979, 1982, 1985 and 1988.
The sychronism of interannual course of the primary production values in various characteristic zones of the sea.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
Abstract:
Zones of 20 km width are defined around selected colonies of penguins distributed around the coasts of the South Shetland and South Orkney islands. Krill catches in these zones are shown to have a consistent pattern in Subarea 48.1 but an unpredictable distribution in 48.2, probably as a result of oceanographic conditions. About 50% of the catch in 48.1 from December to March was taken within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 75% of the catch in 48.2 between December and March was taken within 80km of colonies in the South Orkneys. Estimates of consumption rates, foraging ranges and population sizes from the literature are used to show that for some years, months and zones of distance from the shore the catch of krill is 50% or more of the land-based predator consumption.
