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Cultivation method for twice gonad maturation of micropterus salmoides in one year

A method for cultivating sea bass, which is applied in the field of cultivating the gonads of California sea bass twice a year, can solve problems such as restricting the development of the California sea bass aquaculture industry, and achieve the effect of saving energy, promoting the development and maturation of gonads, and changing seasons.

Pending Publication Date: 2022-08-02
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, off-season breeding is becoming a new trend, and off-season seed breeding is a bottleneck restricting the development of California sea bass farming industry

Method used

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  • Cultivation method for twice gonad maturation of micropterus salmoides in one year
  • Cultivation method for twice gonad maturation of micropterus salmoides in one year

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] The cultivation method for the gonad maturation of the California sea bass twice a year is carried out according to the following steps:

[0025] 1. Selection and temporary breeding of broodstock: Although California perch can be sexually mature in one year, it should not be used as a breeding parent. Large individuals of 2-3 years old should be selected as broodstock. From April to May every year, after the normal reproduction of the California perch in spring, select healthy and lively broodstock with bright body color and no trauma, weighing 0.8-1.1kg / tail, and put them in the ponds that have been cleared for temporary cultivation according to the ratio of male and female 1:1. , according to 3-5% of the fish body weight twice a day in the morning and evening. If there is no suitable pond, use 60-90m 2 Cage culture is also possible. The water depth is more than 2m to ensure that there is a place to escape the heat when the summer is hot.

[0026] 2. Cultivation of ba...

Embodiment approach 2

[0033] This embodiment is substantially the same as Embodiment 1, except that in the simulated overwintering step, no deep river water, deep reservoir water or deep well water is used, and an air source heat pump is directly used for water temperature control.

Embodiment approach 3

[0035] This embodiment is roughly the same as Embodiment 1, the only difference is that in the simulated overwintering step, natural lighting is performed on the breeding workshop every day, and the lighting time is shortened by artificially blocking doors and windows to achieve the required lighting time.

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Abstract

The invention relates to the field of aquaculture technology and fishery independent innovation, and discloses a cultivation method for twice gonad maturation of micropterus salmoides within one year, which comprises the steps of parent selection and temporary rearing, culture water temperature reduction in summer, culture water temperature increase in autumn and winter, illumination time adjustment, parent nutrition supplement adjustment, gonad maturation index calculation and the like. The sexual glands of micropterus salmoides are induced to develop out-of-season maturity, and the requirement that out-of-season breeding has serious lack of parents is met. Through a water temperature adjusting technology, a natural illumination simulation technology and a nutrition enrichment technology, the water temperature, illumination and nutrition requirements of seasonal changes in the nature for gonad development of fishes are simulated, the gonads of micropterus salmoides are induced to mature for the second time within one year, and the purpose of providing sufficient parents required by out-of-season breeding is achieved. And support is provided for expanding the micropterus salmoides culture scale and realizing adult fish culture in the current year.

Description

technical field [0001] The invention relates to the field of aquaculture technology and fishery independent innovation, in particular to a method for cultivating the gonads of California sea bass to mature twice in one year. Background technique [0002] California sea bass ( Micropterus salmoides ), also known as largemouth bass, is a carnivorous fish with a wide temperature range. Its artificial breeding has developed rapidly in recent years. In 2020, the total national output is more than 600,000 tons, and the price is maintained at more than 10 yuan / 500g, and the rate of return is ≧50 %, higher than other common farmed freshwater fish (China Fishery Statistical Yearbook, 2021). Because of its weight gain of 400-500g in one year, fast growth, easy to catch, high price, and shorter breeding cycle than the four major fish, it is widely welcomed by farmers. The firm meat, fragrant meat, and no intermuscular thorns, coupled with the live listing, are deeply loved by consume...

Claims

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Application Information

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IPC IPC(8): A01K61/10A01K63/06A23K10/22A23K50/80
CPCA01K61/10A01K63/06A01K63/065A23K10/22A23K50/80Y02A40/81
Inventor 潘正军朱传坤常国亮赵海涛王辉丁怀宇吴楠李才生
Owner HUAIYIN TEACHERS COLLEGE
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