Cultivo de tilápia do Nilo (Oreochromis niloticus) em tanques rede, na Aquicultura JE, Malhada Grande - Bahia

Abstract

This work describes the activities developed in the aquaculture fishery sector in aquaculture JE in the Malhada Grande Village, Paulo Afonso, BA. The cultivated species was the Nile tilapia (Oreochromis niloticus), the main species cultivated in the region and in Brazil. The internship was held during the period from June 1 to August 10, 2018, with a total workload of 300 hours. The activities developed were: monitoring of the facilities and maintenance of the tanks network; acquisition, acclimatization and settlement of fingerlings and juveniles; production and food management; biometric evaluation and expenditure. Fifteen tanks were harvested with pockets of 5 m3 and 4 mm mesh, containing 2.400 alevins with an average weight of 6 g. The realization of the settlement occurred early in the morning in an attempt to cause minimal stress to the animal. To prevent disease, a pre-release salt bath containing 5 to 10 g of salt per liter of water was performed. The biometric analyzes carried out during the cultivation occurred on a bi-weekly basis, in the classification process, pre-harvesting, or occasionally when irregularity was observed in the consumption of food. The data obtained served to regulate the amount of ration to be offered. The fingerlings (6 - 50 g) were fed every hour. When juveniles were fed, regardless of the mean weight, four times a day. Expenditure was started, which the fish were removed from the tanks with the aid of puçás after lifting on the raft and retraction of the screen, reducing the space and providing the removal of the animals faster. The animals were weighed, weighed until the desired amount was reached, and then the animals were placed in a ice-cold water box for hypothermia. Then in the fish box are added ice / fish / ice to ensure a good quality of freshness of the animal during transport. This stage was important to build new knowledge and put into practice the knowledge acquired throughout the academy, which was previously only theoretical.