Composição centesimal e perfil de ácidos graxos de bijupirás (Rachycentron canadum) juvenis selvagens, criados em cativeiro e adultos selvagens

Abstract

The objective of this work was to compare the fatty acid profile and proximate composition of wild juvenile cobia (Rachycentron canadum), bred in captivity and wild adults. 12 fish were used for each wild and captive-bred category. The wild fish were captured on the coast of the Bahian Recôncavo in the region of the municipality of Santo Amaro da Purificação, Bahia, the fish raised in captivity were donated by a breeder. The fatty acid profile was carried out and the moisture content (UM), mineral matter (MM), crude protein (CP) and total lipids (TL) were determined. Analysis of variance and mean comparison tests were carried out between the wild and captive-bred juvenile category, the wild and captive-bred adult category, with chemical and chromatographic analyzes carried out in triplicates. It was observed that there was a significant difference in the fatty acid profile and in the levels of UM, MM, CP and LT found between wild and captive-bred animals in the juvenile and adult categories, as well as a significant difference between juvenile and adult cobia. in both categories. In wild juvenile and adult cobia, higher concentrations of omega-3 family fatty acids were found, and in captive-bred juvenile and adult cobia, higher concentrations of omega-6 family fatty acids were observed, in terms of UM, MM, PB and LT contents. juvenile cobia in captivity had the highest levels (78.38% UM, 14.23% CP, 2.12% LT and 1.29 MM), the same is observed for adult cobia in captivity compared to wild adults. The results show that cobia in captivity have high levels of proteins and lipids, and higher concentrations of fatty acids from the omega-6 family, in relation to animals captured in the natural environment, therefore, we can infer that the creation of cobia becomes viable due to its carcass quality.