Culture techniques of fork tail fish

Forktail fish is our more common species, today Xiaobian will introduce to you the culture technology of forktail fish, let's take a look!

I. Culture techniques of forktail fish

Artificial culture of forktail fish needs to select fry with good physique and clean up the pond. Fish fry should take intensive cultivation measures before overwintering, and the water temperature in winter should be kept above 10 ℃. The main ingredients of artificial formula feed are fish meal, corn meal, soybean meal, vitamins and minerals, etc.; after growing up slowly, mixed culture can be used to increase the total output of fish species.

II. Disease prevention and control

1. Channel catfish virus disease

The symptoms are hyperemia of fin base and skin, swelling of abdomen, increase of ascites, protruding eyes, white Gill filament, red and swollen kidney, enlarged spleen and congested visceral vessels. It mainly harms fish fry or fry when the temperature is high in summer. Most of the infected fish are fry or species with a body length of less than 10 cm or a weight of less than 10 grams.

Prevention and control methods:

1) pay close attention to the water quality and maintain a good pond environment. The dissolved oxygen in the pond water should be kept above 4 mg per liter.

2) the stocking density of fish fry should be less than 10,000 fish fry per 667 square meters.

3) when the water temperature is above 29 ℃, try not to pull the net or transport fish fry.

two。 Intestinal septicemia

There are small erythema or congestion in the whole body of the fish, and similar spots in the liver or other internal organs, with Gill filaments oozing white; sometimes gray spots appear on the skin of the affected fish; the pathogen can also infect the brain, when the diseased fish often swim in rings, dysfunctional and soon die.

Prevention and control methods:

1) thoroughly clean and disinfect the pond with quicklime, and the silt at the bottom of the pond should be removed to improve the ecological environment.

2) before entering the pond, the fish were soaked in 10 ~ 30 grams of saline solution for 5 ~ 20 minutes, and every 100 kilograms of fish were fed with 25 grams of Baixuening per day for three or four days.