Experience of cultivating Sturgeon in large-scale ponds

In November 2000, the author used 80 mu ponds in Meizhou, Guangdong Province to cultivate hybrid Sturgeon (Acipenser Schrenckii and Amur Sturgeon). After 180 days of feeding, the average yield per mu reached 831.25 kg, and better economic benefits were obtained. the main points of the culture process in No. 1 pond are summarized as follows:

1. The specification of the pond and water quality pond is 4 mu, the bottom of the pond is sandy, each pond is equipped with an independent inlet and outlet and a fixed feeding point, the bottom of the feeding point is cement concrete bottom and smooth, with an area of 6 square meters and a shading net above. Each pond is equipped with two 0.9kW (EORO- 2) Italian aerators. The water source is self-flowing mountain stream water, the annual water temperature is 18-24 ℃, and the water quantity is abundant, the water quality is fresh and pollution-free.

two。 Each pond is thoroughly disinfected with lime before stocking, and the Sturgeon is released only after the water test is safe. The stocking density is 700 fish / mu. On the day of stocking, 30% salt solution should be used for fish disinfection.

3. The individual Sturgeon in the managed pond has grown to more than 25cm and can eat submerged formula feed (crude protein content ≥ 35%). Rinse the table floor with a brush before feeding. In the process of feeding, 0.5% allicin and oxytetracycline should be added regularly to the feed (50kg bait mixed with 100g). The feeding rate is: fish weight 50kg 200g, feeding rate 10% 4g; fish weight 200g 1000g. The feeding rate is 4% 2.5%, 2.5%, 2.5%, 1%, and it is appropriate to finish it within 20 minutes.

Sturgeon has high requirements for dissolved oxygen and poor adaptability to sharp temperature differences. Daily management, to ensure that the dissolved oxygen in the water is higher than 5ppm, the water quality should be fresh. In case of storm, sudden change of temperature difference and decrease of air pressure, it is necessary to patrol the pond, observe and take effective preventive measures.

In the process of breeding Sturgeon in the pond, every 30 days, catch with the net, select those thin Sturgeon, cultivate and rejuvenate the special material in the pond, and then culture in the pond, which is an important technical measure to ensure the high yield of Sturgeon pond culture. After special pond cultivation, emaciated Sturgeon can reach 70% open food and rejuvenation.