CULTIVATION OF THE SEAWEED Ulva spp. WITH EFFLUENT FROM A SHRIMP BIOFLOC REARING SYSTEM: DIFFERENT SPECIES AND STOCKING DENSITY

Boletim do Instituto de Pesca

Patricio René TARAPUEZ¹  Leila HAYASHI²  Mateus Aranha MARTINS³  Vitor Fernandes da SILVA³  Felipe do Nascimento VIEIRA³ 

[1] Universidad de Nariño, Facultad de Ciencias Pecuarias;Universidade Federal de Santa Catarina - UFSC, Departamento de Aquicultura, Seção de Macroalgas do Laboratório de Camarões Marinhos - LCM;Universidade Federal de Santa Catarina – UFSC, Departamento de Aquicultura, Laboratório de Camarões Marinhos – LCM;

关键词: bft;    biomitigation;    growthperformance;    litopenaeusvannamei;    macroalgae;    waterquality;   

DOI  :  10.20950/1678-2305.2020.46.3.602

来源: DOAJ

【 摘 要 】

This work evaluated the use of effluent from a marine shrimp biofloc rearing system to cultivate the green seaweed Ulva. First, the growth of two Ulva species, U. ohnoi and U. fasciata, was evaluated. Second, the best-performing species was cultivated under two different stocking densities (2 g L-1 and 4 g L-1) to evaluate both growth and nutrient uptake rates, considering total ammonia nitrogen, nitrate, and orthophosphate. In both cases, environmental variables were monitored, and the cultivation medium, consisting of 25% biofloc water and 75% seawater, was exchanged weekly. U. ohnoi grew significantly better, considering all variables evaluated (p<0.05). The smaller stocking density produced a higher specific growth rate (p<0.05). Yield, however, was unaffected (p≥0.05). No significant differences in the nutrient uptake rates were observed (p≥0.05). Overall, this work highlights the importance of species selection for seaweed destined for aquaculture. Additionally, it also optimizes the cultivation of seaweeds, specifically U. ohnoi, using effluent from biofloc systems.

【 授权许可】

Unknown