Reviewing the age structured production model (ASPM) as an alternative method to estimate the Patagonian toothfish biomass at CCAMLR Subarea 48.3

Age Structured Production Model (ASPM) have been proposed and applied for Patagonian toothfish stock assessment at CCAMLR Subarea 48.3. Results obtained from this model, presented in the last meeting of WG-FSA-SAM held in Yokohama (Japan), show acceptable fit with standardized CPUE series, annual catches and observed catch length proportions (Wöhler et al., 2005 - WG-FSA-SAM 05/5).
In this paper, we applied the same model, but introducing a function modified from Brandão & Butterworth (2003) to estimate vulnerability patterns. Results were similar to those obtained in paper WG-FSA-SAM 05/5.