SC-CAMLR-IX

In December 1989/January 1990 main krill concentrations along the Antarctic Peninsula occurred NE and SE of Elephant Island, north of the South Shetland Islands, in the central Bransfield Strait and in the SW shelf waters. Mean biomass was 10.1 tonnes per nautical square mile, i.e. an estimated stock biomass of 950,000 tonnes. The zooplankton, however, was dominated by salps in the entire Read More
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Cephalopod fisheries world-wide mainly target species from two families, Loliginidae and Ommastrephidae. Fisheries for the latter have been characterised by dramatically fluctuating annual catches and frequent switches to exploit new target species. It is likely, therefore, that exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This squid Read More
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A method of calculating fishing mortalities which will allow depleted fish stock to recover to levels near those giving greatest net annual increment within two to three decades is illustrated. These fishing mortalities are based on probabilistic descriptions of the future states of a depleted stock, and take into account uncertainty in assessments. Sample calculations show that applying a Read More
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This paper discusses the impact bottom trawling may have on Antarctic benthos. This problem has not been dealt with neither by the Antarctic Treaty System nor by CCAMLR so far.

A detailed description of the structure and mode of operation of a model for estimating food consumption of seabird predators is provided. This model is a development of earlier ones used in the South Georgia Integrated Study Region and incorporates new features, allowing for seasonal variation in predator weight (and hence energy requirements), diet composition and prey energy content. Read More
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