CURVAS DE CRESCIMENTO DE PACU (Piaractus mesopotamicus), TAMBAQUI (Colossoma macropomum) E SEUS HÍBRIDOS POR MEIO DE MODELOS NÃO LINEARES

Abstract

The linear model has been very much used to describe the growth of either animals or plants. In Serrasalmideos these models to describe the growth and weight of the products generated in processing are rare in the literature. The objective of this study was to evaluate the growth and body weight of the products generated with the processing Pacú, tambacu, and Tambaqui paquio through nonlinear models. The species were separately cultivated in nurseries ground, getting this location until the average weight 1200 g, ending at 196 days of cultivation. It was checked the settings of the models: Exponential, Von Bertalanffy, Brody, Gompertz and Logistic through the Akaike criteria (AIC) Bayesian information (BIC). For setting the nonlinear regression models, the models were tested: The logistic model presented for lower body weights, carcass rib and for all groups and genetic parameters for the weight of the head and fillet for Tambaqui tambacu and paquio. For fillet weight, skin and the viscera Pacu, the Brody model, Von Bertalanffy, Gompertz, Logistic and Exponential. The same was observed for the skin of the tambaqui and tambacu the viscera. The exponential model head in Pacu, leather tambacu and Paqui and viscera of Tambaqui and Paqui. Among the sigmoid models, it was found that the "A" parameter for all features in all genetic groups was higher for the Brody model, Von Bertalanffany, Gompertz is logistics, the reverse was observed for the parameter "K". Regarding the parameter B also been found consistency, being higher for the logistic model, followed by Gompertz Brody and von Bertalanffany. Thus the fish carcass results have great significance from an economic point of view and producing, as by means of these, can be carried out both productivity estimates for the fish farmer to fish processing industry.