Desempenho zootécnico de Tilápia nilótica ( oreochromis niloticus ) na fase de engorda em tanques- terra

Abstract

This study describes the activities carried out during the internship and a case study developed during it. The internship took place at the Aquaculture Research Centre - CEPAQ, and lasted 180 days, with the aim of consolidating theoretical and practical knowledge about production of Nile tilapia (Oreochromis niloticus) in earthen ponds. Among the practical activities carried out were tank preparations, stocking of fingerlings, monitoring water quality parameters (dissolved oxygen, water temperature and transparency), feed supply, and performance evaluation and harvesting. For the case of study 8500 fingerlings were stoked in hapas (each containing 4250 fingerlings, with an average weight of 0.2g), in a 1615 m 2 earth pond with an average depth of 1.3m, and these animals were fed commercial feed. In fingerlings stage, the fish were fed 6 times a day with 1mm feed contain 43% PB , in juvenile stage, 3 times a day with 2 mm feed contain containing 34% PB and in the grow-out stage 3 times a day with a 4mm feed containing 28% PB. The temperature showed average of 22.6 oC dissolved oxygen 6.87mg.L -1 and 27.98 cm for water transparency. At the end of production period, the survival of fish was 94.11 %, average, 1.12 feed conversion, and final weight was 264g and 2110.4kg net biomass