Nuôi cá chẽm (<i>Lates Calcarifer</i>, Bloch, 1790) thương phẩm trong hệ thống “Sông trong ao” tại Khánh Hòa

Abstract

The objective of the study is to evaluate the environmental and growth indicators of seabass raised in a "In Pond Raceway System -IPRS" system. Seabass fingerlings are 10cm in size, uniform, density is 69 fish/m³, the farming trough has a volume of 220m³ (22m × 5m × 2m) placed in a pond with an area of ​​10,500 m² (125m × 84m), depth of 2.5m. Slow-sinking industrial food pellets with protein content of 45-48%, fed at 7:00 a.m. (30% - 40%) and 4:00 p.m. (60 - 70%), small fish eat 5 - 7%, large fish eat 2 - 5% of their body weight. After 10 months, commercial seabass raised in the IPRS system achieved a survival rate of 87.8%; average size is 864.9 g/fish, weight gain is 2.8 g/day, length gain is 0.09 cm/day. Harvest volume reached 12,295 kg, an average of 55.9 kg/m³, higher than the recommendation of the USSEC (> 40 kg/m³). This is a pioneering step in the process of researching and replicating the model implemented locally as well as in coastal farming areas to improve productivity and output per unit of water surface area.

Keyword: commercial seabass, In Pond Raceway System, IPRS.