Evaluación de la polaca (Micromesistius australis) del Atlántico sudoccidental, período 1987-1999.
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Taking into account the commercial catches by the Argentine fleet and other fleets that operated around Malvinas Islands (SW Atlantic) in the 1987-1999 period, the current state of southern blue whiting (Micromesistius australis) is assessed. A sequential analysis (Cohort Analysis) tuned, in an ADAPT conceptual framework with six independent indices of abundance, was performed for the southern blue whiting stock of the SW Atlantic. Commercial catch data of the Argentinian fleet and other fleets that operate around Malvinas Islands were used.The indices included catch per unit of effort of different fleets and data from Argentine-British research surveys. The analysis showed that the decreasing trend in biomass observed in previous studies went on during the last years. At the beginning of 1999, the spawning biomass was estimated at 518,000 tons or 34. of the unexploited spawning stock. Recruitment also showed a decreasing trend, followed by stabilization. The current instantaneous fis.....