CULTIVO DA MACROALGA <i>Ulva</i> spp. COM EFLUENTE DE CRIAÇÃO DE CAMARÃO MARINHO EM BIOFLOCOS: DIFERENTES ESPÉCIES E DENSIDADE DE ESTOCAGEM

Autores

DOI:

https://doi.org/10.20950/1678-2305.2020.46.3.602

Palavras-chave:

BFT, biomitigation, growth performance, Litopenaeus vannamei, macroalgae, water quality

Resumo

Este trabalho avaliou o uso de água de um cultivo de camarão marinho em bioflocos como fertilizante no cultivo de Ulva. Inicialmente, o crescimento de duas espécies de Ulva, U. ohnoi e U. fasciata,  foram avaliado. Subsequentemente, a alga com melhor desempenho foi cultivada sob duas densidades de estocagem (2 g L-1 e 4 g L-1), e o crecimento e a absorção de nutrientes (nitrogênio amoniacal total, nitrato e ortofosfato) foram avaliados. Em ambos os casos, variáveis ambientais foram monitoradas e e o biofloco na concentração de 25% foi trocado semanalmente. U. ohnoi apresentou um crescimento significativamente melhor para todas as variáveis consideradas (p<0.05). A menor densidade de estocagem produziu uma taxa de crescimento especí­­fico significativamente maiore (p<0.05), embora a produtividade não tenha sido afetada (pâ"°¥0.05). Diferenças significativas na absorção de nutrientes também não foram observadas (pâ"°¥0.05). No geral, este trabalho destaca a importí­¢ncia da seleção de espécies de macroalgas destinadas í­Â  aquicultura. Além disso, otimiza a viabilidade de se cultivar macroalgas utilizando água de sistemas de bioflocos.

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2020-12-15

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