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A kind of method of controlling the early multiplication of sand pond snakehead in rivers

A technology of snakehead in sand pond and river, applied in the field of aquaculture, can solve the problems of lower cost of seedlings, multiple hatching equipment, difficulty in mass production, etc.

Inactive Publication Date: 2015-12-30
NANJING NORMAL UNIVERSITY
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Problems solved by technology

However, broodstock nest protection for hatching will take up a lot of hatching equipment, which determines the limitations of the production process, and it is difficult to form mass production. If the early breeding of the river sand pond snakehead can be controlled, the hatching equipment will be used multiple times, and the cost of raising seedlings will be reduced. will greatly reduce

Method used

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Embodiment Construction

[0019] A method for controlling the early multiplication of the river sand pond snakehead, comprising the following steps:

[0020] (1) Screening of broodstock: On November 16, 2013, no disease, no injury, and healthy broodstock over 1 year old were collected from the Zhougang Channa breeding base of Nanjing Fisheries Research Institute, with an average body weight of more than 30 grams and a male-to-female ratio of 1.5:1.

[0021] (2) Breeding conditions: the capacity is 0.2m 3 The water depth is 40cm; the light cycle is 4L:20D; the water temperature is controlled at 21±0.5°C, 24±0.5°C, and 27±0.5°C; pH7.0, dissolved oxygen 3mg / L, culture density 15-20 tails / m 3 .

[0022] (3) Intensive cultivation: During the broodstock cultivation period, live bait of wheat ear fish and freshwater shrimp was fed for intensive cultivation.

[0023] (4) Spawning fish nests: 2 ovaries are provided, made of PVC pipes with an inner diameter of 10-12 cm and a length of 20-30 cm; they are pla...

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Abstract

The invention discloses a method for controlling early-bred of odontobutis potamophila. The method comprises the following steps: screening parent fishes, and controlling water temperature during a parent fish rearing process, so that the gonad development of the odontobutis potamophila is promoted; and meanwhile, carrying out enriching broodstock through feeding live food such as pseudorasbora parva and freshwater shrimp, and setting an artificial spawning nest, so that the gonad maturity in advance of the odontobutis potamophila is promoted, the breeding cycle is shortened, and odontobutis potamophila spawning and hatch equipment is recycled. In addition, odontobutis potamophila fries (sold on February) early bred through the method is at least more than three months than fries (sold on May-June) bred normally, so that the fish growth cycle can be prolonged, and the economic benefit of fishes is increased.

Description

technical field [0001] The invention relates to a technology for controlling the early reproduction of fish, in particular to a method for controlling the early reproduction of the river sand pond snakehead, which belongs to the field of aquaculture. Background technique [0002] Odontobutis potamophila belongs to Perciformes, Gobioidei, Odontobutidae, Odontobutis, and is widely distributed in the middle and lower reaches of the Yangtze River and Huaihe River in my country. , Qiantang River, Minjiang River and Pearl River and other water systems are small freshwater benthic carnivorous fish in my country. In recent years, due to the continuous deterioration of the living environment and the repeated destruction of the spawning environment, the wild resources of Channaca chinensis have declined sharply, and it is difficult to find traces in some areas. At present, the fish is mainly supplied to the market by fishing, but it is far from meeting the demand. Some domestic insti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 尹绍武汪亚媛张国松王小鲁胡亚丽
Owner NANJING NORMAL UNIVERSITY
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