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In this work, the standardization of the catch per unit effort (CPUE) of the Southern blue whiting (Micromesistius australis) captured by the surimi fleet that operated in the Southwestern Atlantic Ocean during the period 1993-2018 was carried out. Linear mixed models (LMM) were applied to standardize catch and effort data from two different information sources: fishery statistics (LMMEST) and the observers on board of commercial fleet (LMMOBS). These models were compared between them and with that used nowadays to estimate abundance indices. LMM fit better and no significant change was observed in the index tendency, which would allow more accurate prediction of the mean standardized CPUE values over the years. LMMOBS showed a better adjust and greater explained variability than the LMMEST. With the aim of obtaining accurate estimations and, in this way to be able to adequately calibrate the stock assessment model of the species, it is recommended to use both sources of information, taking into account the greater or lesser degree of representativeness of the data.

marine and fishery sciences

Comparación de índices de abundancia de polaca (Micromesistius australis) a partir de dos fuentes de información mediante la aplicación de Modelos Lineales Mixtos.