Resumo

GONZALEZ, ANGEL; MENDOZA, JEREMY; AROCHA, FREDDY  e  MARQUEZ, ARÍSTIDE. MULTIMODAL ANALYSIS OF THE GROWTH OF Pseudoplatystoma orinocoense IN THE MIDDLE BASIN OF THE ORINOCO, VENEZUELA. Rev.Bio.Agro [online]. 2019, vol.17, n.1, pp.16-24. ISSN 1692-3561.  https://doi.org/10.18684/bsaa.v17n1.1199.

Among the species of greater commercial and fishing importance of the artisanal fishery of the Orinoco River is Pseudopatystoma orinocoense, where the disembarkation of small fish motivated the realization of previous studies of evaluation of its population, which demonstrated a level of overexploitation of the resource. However, the values of the growth parameters that were used in their evaluation have created some uncertainty to be estimated when applying the traditional von Bertalanffy model a priori, so there was a need to verify these results, using the inference of multiple models of Growth and Akaike Information Criteria (AIC) to select the best fit model. The models used were the unified formulas von Bertalanffy (U-von Bertalanffy), Logistic (U-Logistic) and Gompertz (U-Gompertz), derived from the generic model U-Richardas, whose adjustments depended on the information contained in the data. When the data included all ages, the U-von Bertalanffy model produced the best fit, coinciding with previous results of growth of the species. By excluding the ages of one and two years, as occurs with data from artisanal fishing due to selectivity, the best fit was produced by the U-Logistic and U-Gompertz. models.

Palavras-chave : Pimelodidae catfish; Population Dynamics; Growth Parameters; Artisanal fisher.

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