Introduction:

The prior use of von Bertalanffy’s model has been generally used in the study of fish growth, without considering the existence of other growth models that can produce a better adjustment of the data used; considering the use of multiple growth models as a better alternative, to select the one that produces a better adjustment.

Objective:

Due to uncertainty of the results obtained in a previous work on the growth of Plagioscion squamosissimus (Heckel 1840) in the middle Orinoco region in Venezuela, applying a priori the model of von Bertalanffy, the same data were adjusted to other models of growth to select the best adjustment.

Methods:

The models evaluated were the U-von Bertalanffy, the U-Logistics and the U-Gompertz, derived from the global U-Richards model, then the best adjustment was selected using the Akaike Information Criteria (AIC).

Results:

Contradicting the prior use of von Bertalanffy’s model in the previous study, the model that actually produces a better adjustment of the data used was the U-Gompertz.

Conclusions:

It is necessary to evaluate the stock of P.squamosissimus in the middle Orinoco region using growth parameters estimated from an inference of multiple models, in order to validate the existing information of a moderately exploited resource.