Assessment technical and economic efficiency of milkfish Chanos chanos (Forsskal, 1775) farming in the Southeast sea region of Vietnam
Abstract
To evaluate the technical and economic efficiency of the Milkfish farming, two experiments were arranged with different salinity and feed in production conditions. At three levels of salinity of 15, 25 and 35 ppt, the results showed that 25 ppt salinity was the most suitable and selected as a condition for the next feed experiment. At the stocking density was 1 fish/m2, after 120 days of rearing, the results showed that the Milkfish had a high survival rate, from 79.33 - 91.96%. The highest growth reached 543 g when feeding industrial feed 42 % protein at 4% by weight. The ratio of revenue / expense was 2.65, not much higher than the 2.64 ratio of combined feed. This showed that, the form of rearing using a combination of natural food for the first 60 days, supplementing processed food 60 days later had the highest economic efficiency. The maintenance of Milkfish pond was quite simple and did not require technical knowledge, very low energy costs. This feature showed that the Milkfish farming was technically effective, it should be promoted because it could increase income within the limited resources of household.
