Odontobutis obscurus large-size fry artificial classification separate culture method

Abstract

The invention relates to an odontobutis obscurus large-size fry artificial classification separate culture method. The method comprises the steps that 1, a net cage is arranged in an indoor culture groove, oxygen increasing heads are arranged on the periphery of the indoor culture groove, a water pushing device is arrange on one side, and a water filtering device is arranged on the other side; 2,newly hatched larvae of odontobutis obscurus are put in the net cage of the culture groove; 3, the culture water depth is controlled to be 0.3+ / -0.6 m, the water temperature is controlled to be 22-28DEG C, and sewage suction and water replenishing are conducted every afternoon; 4, after hatching is conducted for 3 d, cladocerans and copepods obtained after filtering through a 60-mesh sieve serveas initial feed, after 7 d, bait mainly adopts limnodrilus and secondarily adopts the cladocerans and the copepods, and after 14 d, while the limnodrilus is used for feeding, loach and newly hatched larvae of pseudorasbora parva are additionally put; 5, after hatching is conducted for about 10 d, by taking the head width as the standard, odontobutis obscurus artificial classification separate culture is conducted, and hereafter, specification screening and classification are conducted every 10 d. Accordingly, indoor odontobutis obscurus large-size fry culture is achieved, after culture is conducted for about 50 d, for the odontobutis obscurus, the average overall length reaches about 20 cm, the head width is about 3.3 mm, and the pond survival rate reaches 90%.

Description

technical field [0001] The invention relates to a method for artificially graded and separate cultivation of large-scale seedlings of sandfish, which belongs to a method for cultivating fish seedlings. Background technique [0002] Odontobutis obscurus belongs to the order Perciformes, Odontobutis obscurus, Odontobutis obscurus, commonly known as tiger shark, tiger head nerd, cauliflower fish, etc. The size of adult fish is usually 30-175g / tail. Its meat is tender and delicious. Delicious, nutritious, less intermuscular thorns, deeply loved by the general public, it is a top-grade fish. Sand pond snakehead is mainly distributed in the middle and lower reaches of the Yangtze River and its tributaries along the river, the Qiantang River and the Minjiang River and other water systems, and is occasionally seen in the Yellow River system. It is an endemic species in China. [0003] In 2014, the Jiangsu Provincial Freshwater Fisheries Research Institute took the lead in breaking ...

AI Technical Summary

Problems solved by technology

After the water splash of Channa mongolica is directly put into the pond, it is necessary to implement scientific and standardized baiting and cultivation measures. However, in actual production, due to the different breeding levels of farmers, there are frequent phenomena such as large differences in the survival rate of Channa mongolia seedlings and unstable production. This has seriously affected the stable development of the sandfish aquaculture industry

[0004] Experience shows that the growth of sand pond carp is quite different, and the phenomenon of big fish eating small fish often occurs during fry breeding, resulting in low survival rate

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