Author/Authors :
Paula do Vale Figueiredo, Julianna Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Paula Mariane de Morais, Ana Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Ailton da Silva, Weverson Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Eloíse Queiroz Rafae, Ramires Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , de Lima Santos, Ivanilson Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Laterça Martins, Maurício Laboratório de Saúde de Organismos Aquáticos AQUOS - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil , do Nascimento Vieira, Felipe Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Belettini, Frank Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil , Roberto Andreatta, Edemar Laboratório de Camarões Marinhos - Departamento de Aquicultura - Universidade Federal de Santa Catarina (UFSC), Beco dos Coroas, Barra da Lagoa, Florianopolis, Brazil
Abstract :
The present study aimed to evaluate the influence of different salinities on water quality, growth
performance, and hematology of the Nile tilapia Oreochromis niloticus cultured in a biofloc system. Four
different salinities with four replicates were evaluated: 2, 8, 15, and 22 PSU. The fish (200 ± 10 g) were
stocked at a density of 15 fish m-3 in tanks with 800 L of useful volume for 56 days. Fish were fed with
a 32 % crude protein commercial feed. Water quality remained stable throughout the study. The growth
parameters differed, with the salinities of 2 and 8 PSU presenting higher growth and survival. The treatment
of 15 PSU showed high survival, however, with reduced growth. The salinity of 22 PSU had lower results
than the others for all parameters analyzed. The hematological evaluation showed differences in RBC,
hematocrit, and glucose counts, indicating that salinity may have caused stress to animals cultured at higher
salinities, thus, causing low growth and survival. These results indicate that Nile tilapia can tolerate high
salinities when cultured in a biofloc system. However, salinities above 15 PSU may compromise its growth
and weight gain.
