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1. Habitat long hips for the subtropical river bottom fish, hi clear water environment. Generally living in the bottom of the river, like the slow flow of the estuary, deep pool in the activities, in the winter by rocks or rocks in the deep water overwintering. In pond culture conditions, often inhabit the bottom of the water body. The temperament is more gentle, there is a habit of cluster activities, and it is easy to catch. The survival temperature is 0-38 °C, the optimum growth temperature is 15-30 °C, the normal growth requirements of dissolved oxygen in water above 3 mg / l, when the dissolved oxygen below 1.5 mg / l, began to appear floating head. The suitable pH is 6-8.5 and the optimum pH is 6.8-7.5. The long buttocks are meat-based omnivorous fish, bulimia, like the group feeding, and like to feed in low light conditions. In natural waters, juveniles feed on aquatic insects and shrimps; adult fish feed on benthic animals, small trash fish, shrimps, algae, and small shellfish. Artificial breeding can feed poultry's internal organs, chilled fish and artificial compound feed. The long buttocks have a fast growth rate and can weigh up to 1 kg in the country of origin. Under artificial breeding conditions, the breeding fry in that year was bred for the first year with a body weight of 500 g/tail. Long buttocks? 3 years The gonads begin to mature.
2. Pond conditions Breed ponds with long hips are generally the same as other fish. In view of the high requirement of dissolved oxygen for the fish, the ponds with convenient drainage and irrigation and fresh water should be selected. If old ponds are used, it must be dredged. The pond area is preferably 2001-4669 square meters (3-7 mu), and the water depth is 1.5-2.0 meters. According to the characteristics of the long buttocks and hi-yins, a suitable area of ​​shade sheds should be placed on the pond, and aquatic plants such as peanuts can also be planted in the corner of the pond so that the long buttocks can inhabit the bottom. High-yield ponds must also be equipped with aerators.
3. Seed cultivation ponds should adopt a rectangular pool, specifications for a length of 20 meters, a width of 3 meters, a depth of 1 meter. Stocking amount is 200-600/m2. The feed is mainly fed with leeches. When the fish grows to a body length of 5 cm, they can use aquatic insects such as leeches and red worms. At the stage of fingerlings, they gradually acclimate their artificial diets such as fish paste and squid feed. The five-centimeter-long buttock fingerlings are cultivated for about two months, and reared into adult fish ponds when they are raised to about 10 cm in size.
4. The pond rearing density of adult rearing ponds is about 1000 per 667 square meters (1 mu), and it is suitable for scales and squid. Can also be used as mixed breeds, such as squid, squid, California squid polyculture, stocking 200-300 per 667 square meters. The main pond feed is mainly chilled mixed fish, which is mixed with squid material, and can also be used with some peanut bran and bean cakes. Should pay attention to strengthen water quality management, timely change of water, keep the water fresh, the lack of dissolved oxygen in the water must start oxygenation facilities oxygen, to prevent the death of fish floating head.
Pond culture upstart ---- long buttocks
Long buttock, also known as bone fish, squid, is a scorpion-shaped head, long buttocks, long hip? Long buttocks? Department of the Pearl River water specialty fish, commonly known as horse face bone fish or white face bone fish. Long buttocks, tender meat, high fat content, are the local valuable fish. For decades, due to overfishing, resources have decreased significantly. In recent years, the fish has been gradually domesticated and can be cultured and propagated in ponds.
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