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Method for prompting pond-bred alosa sapidissima to spawn by ecological regulation and control

An American shad and natural technology, applied in the field of fish farming, can solve the problems of high labor intensity and death of broodstock, and achieve the effects of reducing labor intensity, improving breeding technology, and reducing the death of broodstock

Inactive Publication Date: 2010-11-17
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this fish breeding method is that it is not only labor-intensive, but also easily causes the death of broodstock
[0006] Although some domestic research institutes try to carry out artificial breeding of American shad, but because American shad has a strong stress response and dies immediately after leaving the water, artificial breeding can easily lead to the death of broodstock. Therefore, the current breeding technology of American shad needs to be further improved and perfected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention discloses a method for promoting the natural spawning of American shad in ponds by means of ecological control. During the breeding season, that is, from the end of February to the beginning of March, healthy and sexually mature American shad broodstock are selected and stocked in the cultivation pond for intensive cultivation. , intensive cultivation is according to American shad broodstock female: male=1:1 quantity ratio, puts in a suitable place to breed in the cultivation pond with the density of 2 kilograms / cubic meter of water body; Every day 2 times throw something and feed the feed of 2% of fish body weight.

[0023] The feed contains 45% of protein, 0.4% of vitamin E and 2% of unsaturated fatty acid; in addition to the above components, it also contains trace elements, which can be selected from commonly used trace elements in the existing finished fish feed.

[0024] The cultivation pond is a square oval cement pond with an area of ​​200-250 squar...

Embodiment 2

[0028] The difference between this embodiment and Example 1 is that the intensive cultivation is based on the American shad broodstock female: male=1:1 quantity ratio, and is stocked in the cultivation pond with a density of 3 kg / m3 of water body; the fish are fed 3 times a day 2% of body weight feed. The feed contains 48% of protein, 0.8% of vitamin E, and 4% of unsaturated fatty acid; the remaining components are trace elements.

[0029] The water temperature in the cultivation pool is 22°C, and the dissolved oxygen content is kept not lower than 6mg / L; the water flow is kept stimulated, that is, the water flow rate is 3 cubic meters per hour. When it was found that American shad broodstock were chasing each other, the water injection flow was increased to fill the entire cultivation pond in 1 day, that is, the water flow at this moment was 10 cubic meters per hour.

[0030] An egg collection box is set at the drainage outlet to collect the fertilized eggs, and then the fer...

Embodiment 3

[0032] The difference between this embodiment and Example 2 is that the intensive cultivation is based on the American shad broodstock female: male=1:1 quantity ratio, and is stocked in the cultivation pond with a density of 2 kg / m3 of water body; the fish are fed 3 times a day 2% of body weight feed. The feed contains 46% of protein, 0.6% of vitamin E, and 3% of unsaturated fatty acid; the remaining components are trace elements.

[0033] The water temperature in the cultivation pond is 20°C, and the water flow is maintained to stimulate, that is, the water flow is 8 cubic meters per hour. When it was found that American shad broodstock were chasing each other, the water injection flow was increased to fill the entire cultivation pond in 1 day, that is, the water flow at this moment was 12 cubic meters per hour.

[0034] In order to realize the heat preservation and light adjustment of the cultivation pond, the top of the cultivation pond is covered with double-layer plastic...

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Abstract

The invention discloses a method for prompting pond- bred alosa sapidissima to spawn by ecological regulation and control. The method comprises the following steps of: in a breeding season, selecting sexually matured alosa sapidissima parent fish; stocking selected alosa sapidissima parent fish into a breeding pond for enhanced breeding, wherein the water temperature in the breeding pond is stabilized at 18 to 22 DEC G and dissolved oxygen content is kept over 6mg / L; and maintaining water flow stimulation for prompting the alosa sapidissima to spawn continuously and naturally, wherein the water flow is 3 to 8 cubic meters per hour. In the method, germ cells of the pond- bred alosa sapidissima are started and induced to mature and finally the pond-bred alosa sapidissima is prompted to spawn by adopting ecological regulation and control measures such as enhanced breeding, water temperature, dissolved oxygen content, water stimulation and the like, so that parent fish death caused by artificial oxytocin breeding is reduced and labor intensity is reduced.

Description

technical field [0001] The invention relates to the technical field of fish farming, in particular to a method for promoting the natural spawning of American shad in ponds through ecological regulation. Background technique [0002] Fish that have reached sexual maturity in nature can complete the spawning process once they are stimulated by conditions such as a sudden rise in water level, faster water flow, and changes in water temperature during the breeding season, and under the mutual induction of male and female fish , to achieve natural reproduction. [0003] Due to the limitation of the ecological environment conditions of pond culture, the reproduction of fish in ponds generally needs to be injected with exogenous hormones and supplemented with necessary ecological conditions such as water stimulation, that is, the method of combining "physiology and ecology" to promote the growth of ponds. The maturation and ovulation of broodstock in fish farming, and most of them...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 潘德博朱新平陈昆慈李凯彬郑光明
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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