Ảnh hưởng của rong câu (<i>Gracilaria tenuistipitata</i>) và rong nho (<i>Caulerpa lentillifera</i>) lên chất lượng nước, sinh trưởng, tỷ lệ sống và năng suất của tôm thẻ chân trắng (<i>Litopenaeus vannamei</i>) trong mô hình nuôi kết hợp

Abstract

The study was conducted to evaluate effect of two different species of seaweed on water quality, growth, survival rate and productivity of white leg shrimps (Litopenaeus vannamei). Shrimps were cultured in 60 days with 3 treatments including treatment 1 (control treatment of mono-cultured shrimp; treament 2 (shrimp-Gracilaria tenuistipitata); treament 3 (shrimp - Caulerpa lentillifera). Two seaweed species were cultured in shrimp tanks at a density of 2 kg m^-3, shrimps density was 50 individuals m^-3. The results showed that water qualities were better in the treaments 2 and 3 with lower levels of TAN, NO₂^-, NO₃^- và PO₄^3- than those in thetreament 1. The treament 3 resulted in shrimps with higher survival rates, productivities than those of the treament 1 but there was no statistically significant difference (P > 0,05). The treament 2 showed best results (the highest growth, the highest survival rate, the highest productivity of shrimps) and the difference was significant statistically compared with the treament 1. Gracilaria tenuistipitata was recommended to use in integrated models with white leg shrimps.

Keywords: Caulerpa lentillifera, Gracilaria tenuistipitata, integrated model, water quality, white leg shrimps