Nghiên cứu ảnh hưởng của các loại thức ăn và mật độ ương khác nhau lên hiệu quả nuôi cá song da báo <i>Plectropomus leopardus </i> giai đoạn cá giống

Abstract

This study aimed to assess the impact of various feed types, including five treatments (i) Treatment 1: 100% Artemianauplii, (ii) Treatment 2: 100% copepods, (iii) Treatment 3: 100% artificial feed, (iv) Treatment 4: 50% Artemianauplii + 50% artificial feed, and (v) Treatment 5: 50% copepods + 50% artificial feed, alongside four stocking density treatments (500, 1000, 1500, and 2000 fish/m³) on survival rate, growth rate, grading percentage, and deformity rate of juvenile leopard grouper (Plectropomus leopardus).The results indicated that the combination of 50% copepods and 50% NRD-INVE artificial feed (Treatment 5) achieved the highest survival rate (68.6%) and the best average daily growth rate (0.67 mm/day). Conversely, the treatment with only artificial feed (Treatment 3) had the lowest survival rate (22.2%). Additionally, the highest survival rate (72.1%) was observed at a stocking density of 1000 fish/m³, while the lowest grading and deformity rates were observed at a stocking density of 500 fish/m³. Thus, the study recommends that the most effective juvenile rearing protocol for leopard grouper involves the use of a 50% copepod and 50% artificial feed regime with a stocking density of 1000 fish/m³.

Keywords: Leopard coral trout grouper (Plectropomus leopardus), feed, stocking density, survival rate, growth rate, grading coefficient, deformity rate