Ecology regulation and control method for delaying sex reversal time of eels

An ecological and eel technology, applied in fish farming, climate change adaptation, application, etc., can solve the limitation of the number and scale of fry and seed reproduction, the small amount of female eel parental individuals and gestation, stocking time, quality and quantity And the source can not meet the needs of large-scale and industrialization of eel breeding, to achieve the effect of improving the fecundity of the group and meeting the requirements of seedlings

Inactive Publication Date: 2013-04-03
YANGTZE UNIVERSITY
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Problems solved by technology

[0003] However, at present, the seedlings required for eel farming are mainly wild resources, and wild eel seedlings cannot meet the needs of large-scale and industrialized eel farming in terms of stocking time, quality, quantity, and source. Therefore, The manual mass production of eel fry is an inevitable requirement for large-scale eel cultivation
However, there is a phenomenon of sexual transition in eel in its life history, that is,

Method used

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Embodiment Construction

[0018] Implement the present invention, take the Jianghan Plain area as an example, can carry out according to the following steps:

[0019] (1) Artificial breeding to obtain 1-year-old eel with uniform development:

[0020] Put the net cage with a specification of 100cm×150cm×100cm into the paddy field, spread 10-15cm of soil on the bottom of the cage, and then inject water into the paddy field. The water level should be 8-10cm above the soil surface in the cage; Several water hyacinths are floated in the net cage as a place for parents to build nests, mate and lay eggs, and fertilized eggs hatch and emerge. In the middle of May of that year, 2 sexually mature female and 2 male parents were placed in the net cage, and artificially cultivated for about 15 days, allowing them to lay eggs, fertilize and hatch naturally in June to July, and collect eel species in batches after emergence The seedlings were transferred to pond cages for cultivation until June to July of the follow...

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Abstract

The invention relates to an ecology regulation and control method for delaying the sex reversal time of eels. The ecology regulation and control method for delaying the sex reversal time of the eels is characterized in that under an ecology imitation condition, young eels with the same specification are massively produced, and moreover, with the adoption of a pond net cage breeding method, the young eels obtained in the same year are bred and overwinter to grow into 30-40g 1-full-age eels; and after the overwintering, the 30-40g 1-full-age eels are fed for one year with high protein nutrients at a high density in a pond net cage, wherein the feeding density is 50-80 eels per square meter and the feed protein content is 40% to 42%. Through the method, 2-winter-age female eel parents with great brood amount and an individual specification of more than 100g can be produced; the colony reproductive capacity of the female eel parents can be improved by 200% to 300%; the quantity of the produced young eels is correspondingly improved by 200% to 300%; and therefore, the demand on the large-scale breeding of the young eels can be met.

Description

Technical field: [0001] The invention relates to an ecological control method for delaying eel's sex transition time, and belongs to the technical field of fishery science application. Background technique: [0002] Eel is one of the freshwater famous and high-quality fish that has developed rapidly in recent years in my country. Its main breeding areas are located in Hubei, Hunan, Anhui, Jiangxi, Zhejiang and other provinces in the middle and lower reaches of the Yangtze River; eel farming has become an important part of the aquaculture industry in these areas. leading industry. [0003] But at present, the seedlings required for eel farming are mainly wild resources, and the wild eel seedlings cannot meet the scale and industrialization needs of eel farming in terms of stocking time, quality, quantity and source. Therefore, The artificial mass production of eel fry is an inevitable requirement for large-scale eel cultivation. However, there is a phenomenon of sexual trans...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 杨代勤阮国良袁汉文苏应兵陈芳杨小林
Owner YANGTZE UNIVERSITY
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