Carcass yield of surubins “Pseudoplatystoma” spp. produced from cages and fishponds

Abstract

This study aimed to evaluate the carcass yield of surubins Pseudoplatystoma spp. produced in cage and fishponds. Adopted was a completely randomized design with two treatments (cages and fishponds) and twenty repetitions. The surubins with a total weight average 0.839 ± 0.181kg and 0.983 ± 0.108kg cages and fishponds respectively, were sacrificed by thermal shock on ice for determining: yields of eviscerated fish with and with no head (YEFWH; YFWNH); yield of gills (YG); yield of the lateral fillet with and with no skin (YLFWS; YLFWNS) yield of the abdominal fillet with and with no skin (YAFWS; YAFWNS), yield of head (YH), yield of skin (YS), yield of viscera (YV) yield of residues (YR). Data were submitted to analysis of variance and means were compared by Tukey test at 5%. Among the variables analyzed, there was a statistical difference only for RB, with averages of 3.79 ± 0.38% for production in cages and 4.44 ± 0.47% for production fishponds. The YH surubim represented 15.46 ± 0.97% and 15.83 ± 1.04% for production in cages and fishpond, respectively. For the eviscerated fish with head yield values were 89.98 ± 1.06% production in cages and 89.40 ± 4.90% for production in fishpond. The values of YLFWNS and YAFWNS production in cages were 31.15 ± 1.78%, 9.01 ± 0.50%, respectively, and for production in fishponds were 30.14 ± 1.75%; 8.83 ± 0.51%. Surubins Pseudoplatystoma spp. produced in cages and fishponds have carcass yield similar.