Odontobutis obscura fry grading cultivation method

A cultivation method and technology of sand pond snakehead, applied in the field of seedling raising, can solve problems such as affecting the yield of seedlings, and achieve the effects of avoiding mutual killing and improving the survival rate.

Pending Publication Date: 2022-03-18
FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to invent a kind of method for cultivating the seedlings of Snakena argentina by dividing the same cement in time for the problem that large and small ones will affect the harvest rate of seedlings when the irregular specifications are separated when they are cultivated in outdoor cement ponds. The different sizes and specifications of the sand pond carp in the pond are cultivated separately to reduce the occurrence of mutual cannibalism and improve the survival rate

Method used

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with embodiment.

[0019] A kind of cultivation method of sand pond snakehead seed classification, it comprises the following steps:

[0020] First, the seedlings after emergence in the indoor nursery pool are screened for the first time in late April each year:

[0021] Concentrate the seedlings in the cages, first use a 20-mesh screen to filter out food residues and feces stains, then use a 16-mesh screen to filter out large particles of residue, and finally use a 10-mesh screen to filter out the ones with a size of about 1.0cm. For the seedlings of Channa nada with the same specifications and no impurities, remove the seedlings to the cement pond with the outdoor drainage structure, and the density is 2500 tails / ㎡; the outlet of the cement pond with drainage should be equipped with corresponding anti-escape nets; The structure of the cultivation pool can be found in Chinese patent 202121927259.2. ...

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Abstract

The invention relates to an odontobutis obscura fry grading cultivation method, which is characterized by comprising the following steps of: firstly, carrying out first-time screening on seedlings after emergence in an indoor nursery pond in late April every year, secondly, carrying out second-time screening between 10 to 15 days of first-time fry putting in early May every year, and thirdly, carrying out second-time screening between about 15 days of second-time screening in mid-late May every year, fourthly, the odontobutis obscura is screened for the fourth time 18-20 days after the third time of screening, the odontobutis obscura is screened through a 4-mesh screen, the specification of the upper portion of the screen is 1.55/g, and the overall length of the upper portion of the screen is about 3.5 cm; the specification of the lower surface of the screen is 3.3/g, and the overall length of the odontobutis obscura is about 2.5 cm. By means of regular screening, the odontobutis obscura of different specifications is cultivated in a grading mode, the odontobutis obscura of different specifications is prevented from killing one another, and the survival rate is remarkably improved.

Description

technical field [0001] The invention relates to a seedling raising technology, in particular to a method for increasing the seedling emergence rate of the sandfish seedling, and a hierarchical cultivation method. Background technique [0002] As we all know, Channa is a small bottom-dwelling carnivorous fish. In the process of large-scale cultivation, the number of seedlings per square meter is as high as 2000-3000, and live biological bait such as silk earthworms and red worms are used as food. In the case of insufficient bait, snakeheads will eat big and small. With the extension of breeding time, the size will gradually increase, and it is more likely to eat big and small. Especially in the case of breeding ponds, small sand Channa is more likely to be attacked because there is no place to hide, and the number of ponds will gradually decrease. There is no good solution to this. Contents of the invention [0003] The purpose of the present invention is to invent a kind ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10A01K61/95
CPCA01K61/10A01K61/95Y02A40/81
Inventor 郑友刘国兴夏爱军郑啸宇霍春林郝忱丁淑燕
Owner FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE
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