Title of article :
Effect of stocking density on water quality, plankton community structure, and growth performance of Litopenaeus vannamei post-larvae cultured in low-salinity biofloc system
Author/Authors :
Ailton da Silva, Weverson Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade, Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Luiz da Silva, Jorge Laboratório de Experimentação com Organismos Aquáticos - Unidade Acadêmica de Serra Talhada, Universidade Federal Rural de Pernambuco, Av. Gregório Ferraz Nogueira, s/n, José Tomé de Souza Ramos, Serra Talhada, Brazil , Yure B. Oliveira, Carlos Laboratório de Produção de Alimento Vivo - Departamento de Pesca e Aquicultura, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros, Dois Irmãos, Recife, Brazil , Paula Mariane de Morais, Ana Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade, Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Akemi Shinozaki-Mendes, Renata Universidade Federal Rural de Pernambuco - Unidade Acadêmica de Serra Talhada, Laboratório de Biologia Pesqueira. Av. Gregório Ferraz Nogueira, Bairro: José Tomé de Souza Ramos, CEP, Serra Talhada, PE – Brazil , Lima Silva, Ugo Laboratório de Experimentação com Organismos Aquáticos - Unidade Acadêmica de Serra Talhada, Universidade Federal Rural de Pernambuco, Av. Gregório Ferraz Nogueira, s/n, José Tomé de Souza Ramos, Serra Talhada, Brazil
Abstract :
This study aimed to investigate the effects of stocking density on Litopenaeus vannamei at the
nursery phase in low-salinity biofloc system. Post-larvae of L. vannmei were cultured for 28 days at 2000,
4000 and 6000 shrimp m-3, and the water quality, plankton composition and growth performance were
evaluated. The water quality variables remained within the ideal range for the shrimp culture, and only total
suspended solids showed a significant difference between treatments – the highest stocking density has
increased the levels of total suspended solids. In regarding to zooplankton structure, the Protozoa group had
the greatest diversity regardless of treatment, and also the greatest abundance (> 66%). For phytoplankton
structure, Bacillariophyta (Navicula sp. and Cyclotella sp.) was the dominant class in phytoplankton
structure throughout the culture, although a Cyanobacteria bloom has reported at the end of the cultivation
at 2000 shrimp m-3. At the end of cultivation, the shrimp yield (0.133 ± 0.028 kg m-3) was significantly
higher in the 6,000 shrimp m-3. In contrast, the shrimp survival was significantly higher in the lowest
stocking density (71.66 ± 10.36%). Our findings suggest that a density of 6,000 shrimp m-3 should be used
under these conditions, but an economic feasibility study should be considered in the future.
Keywords :
Aquaculture , Brackish water , Live food , Semiarid , Shrimp farming
