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Finless eel net cage ecological breeding method

A net cage and eel technology, applied in the field of eel breeding industry, can solve the problems of low recapture rate, high cost, and difficult cultivation of eel seedlings, and achieve the effect of solving difficult fishing, low production cost, and fast growth speed

Inactive Publication Date: 2013-11-27
WANGJIANG ZHIYU SPECIAL AQUATIC PROD DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the characteristics of rice field eel, such as sex reversal, low fecundity, batch spawning, long incubation time, and irregular film production, artificial reproduction is difficult, and large-scale reproduction technology has not yet been broken through.
[0004] The eel seedlings cultivated by existing methods such as earthen pond seedling cultivation and paddy field cultivation have a low return rate, are difficult to cultivate, and are difficult to recycle eels, and the workload is heavy, the cost is high, and it is difficult to form large-scale production

Method used

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  • Finless eel net cage ecological breeding method

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Effect test

Embodiment 1

[0023] Present embodiment relates to a kind of method of eel cage ecological seedling raising, such as figure 1 shown, including the following steps:

[0024] Step (1), parental breeding: in July every year, select 15 high-quality and healthy eel seedlings / 500g, and stock them in an area of ​​4m 2 1. In the parental breeding net cage with aquatic plants water peanuts inside, feed with fresh surimi or fresh earthworms until the beginning of June of the second year;

[0025] Step (2), selecting parents: selecting healthy female eels and male eels with mature gonads from the cultivated eel seedlings as parental eels, male eels ≥ 150 g / tail, female eels ≥ 50 g / tail;

[0026] Step (3), cage mating and spawning: according to the ratio of male to female 1:1, put one of the above-mentioned male eels and one of the above-mentioned female eels in each spawning cage with a size of 1m×1m×1m and water peanuts inside. Let them lay eggs and fertilize them naturally;

[0027] Step (4), int...

Embodiment 2

[0031] Present embodiment relates to a kind of method of eel cage ecological seedling raising, such as figure 1 shown, including the following steps:

[0032] Step (1), parental breeding: in July every year, select 20 high-quality and healthy eel seedlings / 500g, and stock them in an area of ​​4m 2 1. In the parental breeding net cage with aquatic plants water peanuts inside, feed with fresh surimi or fresh earthworms until the beginning of June of the second year;

[0033] Step (2), selecting parents: selecting healthy female eels and male eels with mature gonads from the cultivated eel seedlings as parental eels, male eels ≥ 150 g / tail, female eels ≥ 50 g / tail;

[0034] Step (3), cage mating and spawning: according to the ratio of male to female 1:1, put one of the above-mentioned male eels and one of the above-mentioned female eels in each spawning cage with a size of 1m×1m×1m and water peanuts inside. Let them lay eggs and fertilize them naturally;

[0035] Step (4), int...

Embodiment 3

[0039] Present embodiment relates to a kind of method of eel cage ecological seedling raising, such as figure 1 shown, including the following steps:

[0040] Step (1), parental cultivation: in July every year, select 25 high-quality and healthy eel seedlings / 500g, and stock them in an area of ​​4m 2 1. In the parental breeding net cage with aquatic plants water peanuts inside, feed with fresh surimi or fresh earthworms until the beginning of June of the second year;

[0041] Step (2), selecting parents: selecting healthy female eels and male eels with mature gonads from the cultivated eel seedlings as parental eels, male eels ≥ 150 g / tail, female eels ≥ 50 g / tail;

[0042] Step (3), cage mating and spawning: according to the ratio of male to female 1:1, put one of the above-mentioned male eels and one of the above-mentioned female eels in each spawning cage with a size of 1m×1m×1m and water peanuts inside. Let them lay eggs and fertilize them naturally;

[0043] Step (4), ...

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Abstract

The invention relates to a finless eel net cage ecological breeding method. The finless eel net cage ecological breeding method comprises the steps of adopting a net cage low-density sparse breeding aquaculture technology to create a finless eel symbiotic ecological environment, selecting bred high-grade parental finless eels, performing intensive cultivation, enabling the finless eels to naturally perform spawning, fertilization, hatch and birth in a net cage, then taking away the parental finless eels, artificially feeding young finless eels and finally breeding finless eels. The method utilizes the net cage to breed finless eel fry, operation is easy, bred finless eel fry is easy to catch, the working amount is small, the production cost is low, the water quality is easy to manage, the problem that the finless eel fry is difficult to catch is solved, and industrial large-scale production of the finless eel fry is facilitated. In addition, the method does not adopt artificial spawning, meets the requirement for gonad development through advanced breeding of the parental finless eels and achieves natural spawning and fertilization, the bred fry is good in constitution and quick in growing speed, and the survival rate of the finless eel fry is improved.

Description

technical field [0001] The invention relates to the technical field of rice field eel breeding industry, in particular to a method for ecological seedling cultivation of rice field eels in net cages. Background technique [0002] In recent years, wild natural eel seedlings are decreasing year by year, wild eel seedling resources are scarce, and the rice field eel breeding industry is developing rapidly. Natural seedlings alone can no longer meet the needs of the eel farming industry. Therefore, artificial propagation is the solution to the shortage of rice field eel breeding seed The inevitable way, artificial propagation of eel seedlings is imperative. [0003] However, due to the characteristics of sex reversal, low fecundity, batch spawning, long incubation time, and irregular film production, the artificial reproduction of rice field eel is difficult, and the technology of large-scale reproduction has not yet been broken through. [0004] The eel seedlings cultivated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 刘智江春林
Owner WANGJIANG ZHIYU SPECIAL AQUATIC PROD DEV
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