The technique of mixed culture of fish and fish
In the pond where unisexual tilapia and puffer fish are mainly cultured, there are usually more freshwater shrimp under the condition of artificial diet, which is the best bait for Thai bamboo shoot shell fish. 50-80 Thai bamboo shoot shell fish fry can be put in each mu at the same time, and a small number of artificial nests can be placed. Thailand bamboo shoot shell fish can be increased by 20-30 kg per mu at the same time.
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Parent fish cultivation
1. Parent fish cultivation (1) the age of sexual maturity is 2-3 years old, and the weight of sexual maturity is more than 0.5 kg. The spawning and breeding period is from May to June. (2) there are a large number of "chasing stars" in the head, pectoral fin and caudal stalk of male and female mature males, and there is a rough feeling in the hands; when the abdomen is narrow and sexually mature, milky semen is released from the testis of the abdomen gently pressed; and the first fin of the pectoral fin is thick and wavy. The female fish has no "star chase" or only a small amount of star chase in the eyes and back, which is obvious in the abdomen.
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Identification and use of common fish drugs
First, antibacterial ⑴ furazolidone, also known as dysentery. Yellow powder, tasteless, has broad-spectrum antibacterial effect, low toxicity, oral medicine bath can be used to prevent and cure eel rotten Gill, enteritis, red fin disease, red spot disease. Orally, 1520 grams per 100 kg of feed, a course of 3-5 days; medicine bath, sprinkle powder liquid in the whole pool according to the amount of 2 grams per cubic meter. As the drug is insoluble in water, it can be soaked and mixed with alcohol before use. ⑵ chloramphenicol. White powdery drug, soluble in water, for the prevention and treatment of gram-negative
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