Breeding and breeding commercial lentils

Yellow lentils have the scientific name Mytusnemurus, living in freshwater and brackish water areas of the Southeast and Mekong Delta. As a species of catfish for delicious meat, with high economic value, in recent years yellowfinfish has been overexploited so the output is seriously degraded in nature. Currently, with the success of breeding, commercial fish farming is progressing very well.

Mr. Ngoc removed the stick and incubated the eggs with Weis pots, where the fishes were born.(Photo: Minh Tu)

Sticking with many years of aquaculture, Master Ngo Van Ngoc (Department of Fisheries of Nong Lam University in Ho Chi Minh City) is very knowledgeable about the actual needs and prospects of many freshwater fish species. Lagerstroemia is a delicious, high-priced fish that is ' on the brink of extinction ' as one of the subjects of research that is favored by Master Ngoc. After a year of searching for leper fish to study, propagate, Master Ngo Van Ngoc and research team from the Department of Fisheries of Nong Lam University in Ho Chi Minh City have completed a scientific research project for yellow-spotted fish to reproduce. creating and rearing breeding fishes to contribute to promoting sustainable aquaculture.

The process of artificial reproduction of golden lentils can be summarized as follows: catch fish from Tri An lake (Vinh Cuu district, Dong Nai province) to cultivate in 400m2 soil pond with water depth of 1.2m, in 5 months. 3 females were selected for breeding weighing from 0.35kg to 0.8kg / head. Using LH-RHa injections into male fish at a dose equal to one third of the female's. At a water temperature of about 30 ⁰ C, the time ranges from 11-12 hours, the rate of ovulated fish reaches 98%. Actual fertility ranges from 126,364 to 142,000 eggs / kg. After insemination, the eggs are removed and incubated with Weis flasks. At a water temperature of 30 ⁰ C, the development time of chelate embryos is 20 hours from the time of fertilization. At the stage of rearing from fry to fry, after hatching about 60 hours, larvae of yellow lentils start to eat. After 72 hours of hatching (3 days old), the fish eat very strong. At 4 days of age, fish can eat worms only. 14 days old, fish length 2.7 - 2.9cm.

Inject LH - Rha in to propagate lemur.(Photo: Vu Quoc)

Currently, artificial hatchery production process is complete and the Nong Lam University of Fisheries Experimental Center in Ho Chi Minh City can transfer to farmers or breeding businesses. In addition, this study can also transfer the production process of yellow trout and hatchery fish.

Lentils have the ability to adapt to brackish and sweet environments and give high economic efficiency . At present, the movement of raising these fish species is developing strongly in the Mekong Delta provinces, the Southeast and having a favorable consumption market. At the end of 2006, in Vinh Cuu district, Dong Nai province for the first time exported ' cages ' of 10,000 tons of commercial fish worth billions of dong.

After 5 months of implementation, MSc Ngo Van Ngoc and the Department of Fisheries, Nong Lam University of Ho Chi Minh City successfully transferred the fishy production process to the Center for Research and Production of An Giang Aquaculture. Nguyen Thi Ngoc Trinh, director of the An Giang Center for Aquaculture Research and Production, said that at present, the center has transferred farmers to breed breeding animals to test 100,000 fish (from size fish). 5-6cm) trade item. These seeds are of good quality and adaptable in pond and raft culture conditions in An Giang. It can be affirmed that the golden lagerfish has a high fertility, omnivorous, can grow densely and grow quickly. According to her, this phase was successfully raised for 83,000-85,000 VND / kg, soon the center will deploy mass farming in the population.

VU HUNG