Poland began krill fishing operations in the 1976/1977 season. It has been engaged in krill commercial fishery since the 1986/1987 season. Maximum catches, equalling 15.9 thous tonnes. were, attained in the 1992/1993 season. The report presents an analysis of Polish krill catches in the 1991/1992 and 1992/1993 seasons. CPUEs by month in individual subareas of the Atlantic sector of the Antarctic were calculated. The results of biological investigations of krill on the fishing grounds of the South Orkney and South Georgia subareas are also given.
There is no abstract available for this document.
Abstract:
In 1994 the group of above mentioned authors has completed the first stage of researches for creation of an imitation model of krill distribution and search in the Cooperation and Cosmonauts Seas (30–80°E).
At this the following main problems were addressed:
- Systematization of krill echograms (types of aggregations, their main characteristics),
- Assessment of distribution of aggregations (length, volume of concentrations, occurrence frequency, stability on time-scale,
- Assessment of results of fishing activity of Soviet FVs in the synoptic, seasonal and annual aspects,
- Working out of algorithms for automatic processing of materials by means of computing devices and mathematic analysis of distribution of krill concentrations and catch size.
There is no abstract available for this document.
Abstract:
The method of simulating recruitment variability using observed ratios of 0 year krill to the total population is validated and tested. The method also links natural mortality to krill recruitment. Incorporation into the SKDM increases the variability of the krill population dynamics predicted by the model, although median escapement is similar to the previous formulation of the model.
Abstract:
The parameters used to model gear selectivity and maturity at length in the SKDM were derived from data available at the CCAMLR Data Centre or in documents submitted to past meetings of the Scientific Committee. In the SKDM, if l50 for selectivity and maturity is to be sampled from a uniform distribution, and applied to a standard function width, then these should be
lr50 = U[30,39] wr = 9mm for gear selectivity
Im50 = U[32,37] wm = 6mm for maturity
