Análise do desempenho do camarão marinho Litopenaeus vannamei (BOONE, 1931) em um sistema semi-intensivo no Nordeste Paraense: um estudo de caso

Abstract

The present study was carried out to evaluate the cultivation of Litopenaeus vannamei in a semiintensive system at different densities in the municipality of Curuçá, northeast of Pará. Shrimp were stocked in the post-larvae phase (PL 35) in four ponds, stocked at densities of (D1): 28 shrimp / m2; (D2): 33 shrimp / m2; (D3): 40 shrimp / m2 and (D4): 50 shrimp / m2. Shrimps were fed 40% P.B commercial feed until the 30th day of the cycle and 35% P.B from 31° to the end. The results of zootechnical performance variables showed that up to the 34th day D1 reached the highest average weight (4.49±0.12g) and the lowest with 3.32±0.29g (D2). The 40% feed percentage offered ranged from 19 to 25% of the total throughout the cycle. After 30 days consuming feed of 35% shrimps had lower average weight in D3 (7.92 ± 0.29) and higher in densities D4 (9.7 ± 0.34g), and higher amount of feed was offered for the nursery with D2 (13,565kg), and the lowest for D4 (9,231kg). The cultivation with a density D4 showed better results of average weight and higher biomass and the smaller amount of feed offered, while the lower density (D1) of storage showed good performance in relation to total weight gain and final weight. Effective management of rations through food adjustment can generate the reduction of production costs, with a more accurate monitoring of feeds allowing better production results.