Mandarin fish artificial advance propagation method

A technology for artificial breeding and mandarin fish, which is applied in fish farming, medical science, climate change adaptation, etc., can solve the problems of not paying attention to germplasm purification and rejuvenation, affecting the growth period, and high breeding risks, so as to shorten the breeding cycle and promote early breeding. effect of time

Inactive Publication Date: 2006-02-22

苏州市水产研究所有限公司

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Problems solved by technology

However, due to the constraints of factors such as geographical location and climate, the artificial breeding of anchovies under normal temperature conditions in this area can only be carried out in the first ten days of May, which affects the growth period of the year and prolongs the breeding cycle for growing into the market. It is not conducive to the improvement of production and eff...

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Method used

Fish ovum is put in hatching tank (barrel) and hatches, and control current, water temperature and density during hatching, to guarantee good hatching condition.

The group head broodstock is put into the pond of greenhouse, cultivates after body surface disinfection, regularly throws something and feeds sufficient and appropriate fresh grass in the cultivating pond, keeps the water in the pond alive and cool, adjusts and controls the gradual improvement of water temperature, advances its Gonads mature. At the beginning of January, put them...

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Abstract

The invention discloses a mandarin fish advanced artificial propagation method. The method comprises (1) selecting parent fish, (2) breeding parent fish, (3) artificial uteracon, (4) hatching, (5) breeding scrod, (6) breeding mating baitfish. Artificial breeding the parent fish in warmhouse originally, making the gonadal advance mature and reducing the reproductive cycle of the mandarin fish and getting the goal of breeding and sales in a same year and processing important social benefit and economic benefit using the technology of adjusting and controlling water temperature. During the breeding of mandarin scrod fish, early maturing breeding the soft-shelled turtle parent fish and advanced done artificial propagation to solve the problem of mating shedding bait fish for the scrod of the mandarin fish; providing mandarin fish with sufficient bait fish using the natural breeding of thecrucian in normal temperature condition.

Application Domain

Animal reproductionClimate change adaptation +1

Technology Topic

BroodstockReproductive cycle +8

Examples

Experimental program(1)

Example Embodiment

[0021] Example: A method for artificial reproduction of mandarin fish in advance, which mainly includes the following steps:

[0022] 1. Choose the broodstock

[0023] In winter and spring, broodstock with strong physique and non-injured body are harvested from the breeding pond and placed in the pond of the greenhouse for artificial breeding.

[0024] 2. Cultivation of broodstock

[0025] The broodstock are put into the pond of the greenhouse and cultivated after disinfection of the body surface. The breeding pond is fed with adequate and palatable live bait fish regularly to keep the water quality of the pond fresh, absorb pollution once a day in the morning, and conduct water quality monitoring once a week. Situation and daily observations Change the pool water in time. The amount of each change is 1/3 to 1/2 of the original pool water. The air pump is turned on 24 hours a day to increase oxygen through the bubble head to adjust and control the water temperature to gradually increase.

[0026] Put it into the cement pond of the greenhouse and gradually heat it around February 1st, and the stocking density is 3 fish/m 2 ,At the same time with feed fish 0.5~1kg/m 2. During the wintering period, the accumulated temperature reached by the daily average water temperature is more than 600℃ higher than that under natural conditions, which can ensure the maturity of its gonadal development. The water temperature regulation and control technology is as follows:

[0027] From early February to mid-February, the water temperature was gradually increased from 10°C to 13°C; from mid-February to the end of February, the water temperature was gradually increased to 16°C; from early March to mid-March, the water temperature was gradually increased to 19°C; in March From mid-term to the end of March, the water temperature is gradually increased to 23°C; in April, the water temperature is increased to 25°C or more and artificial reproduction can be carried out.

[0028] 3. Artificial induction of labor

[0029] Artificial spawning was carried out in early April. Individuals with well-developed, undamaged fish, smooth body surface and normal activities were selected as broodstock, and they were injected with spawning agents and placed in the spawning pool to allow them to lay eggs.

[0030] 4. Incubation

[0031] Put the fish eggs in the hatching tank (bucket) for incubation, and control the water flow, water temperature and density during hatching to ensure good hatching conditions.

[0032] 5 Cultivation of juvenile fish

[0033] Young mandarin fish are cultivated in cement ponds and loops in the greenhouse.

[0034] 6. Cultivation of supporting bait fish

[0035] According to the mandarin fish's habit of eating bait fish for life from opening to development, the bait money for breeding of its juvenile fish can be divided into:

[0036] (1) Early breeding and fry breeding of broodstock bream of open bait fish

[0037] The broodstock bream is put into the pond of the greenhouse, and cultivated after disinfection of the body surface. The cultivation pond is fed with adequate and appropriate fresh grass regularly to keep the pond water alive, regulate and control the water temperature to gradually increase, and advance its gonadal maturity. At the beginning of January, put it into the greenhouse cement pond to gradually heat up, the stocking density is 2 fish/m 2 , Feed fresh grass regularly in the cultivation pond every day. During the wintering period, the daily average water temperature adjustment and control technology is as follows: in January, the water temperature is gradually increased from 10℃ to 12℃; in February, the water temperature is gradually increased to 15℃; in March, the water temperature is gradually increased to 20℃; 4 the water temperature is increased to Artificial reproduction can be carried out above 22°C.

[0038] At the appropriate time before the opening of the mandarin fish fry, the spawning and reproduction of the blunthead bream is carried out to ensure the opening of the mandarin fish fry is alive. After the mandarin fish eggs emerge from the membrane, the broodstock of siniperca bream is induced to spawn, and 3 batches of spawning are continuously induced for 3 days to ensure that the mandarin siniperca fry can be supplied with open live bait fish for 3 days. The number of groups of 3 batches of siniperca bream is controlled within this group. The number of mandarin fish parent groups is 20-25 times, and the group of bream fry is fed once every 4-6 hours, and the fry density after each feeding of the bait fish is controlled at 4 to 5 times the number of mandarin fish fry.

[0039] (2) Cultivation and fry breeding of crucian carp, the broodstock of palatable bait fish. In winter and spring, the broodstock of crucian carp with strong physique and undamaged body are harvested from the breeding pond. After the male and female are separated, the broodstock is put into the pond for breeding. The male and female broodstock are mixed together before giving birth and allowed to spawn naturally and hatch the seedlings.

[0040] From December to January, separate the male and female crucian carp broodstock in ponds under natural conditions. In March, mix the male and female crucian carp broodstock together. The stocking amount per mu is about 200 kg. Pay attention to the activities of the broodstock around the end of March. In case of estrus, place the ovarian hole in time and take it out to the prepared pond to incubate the seedlings.

[0041] (3) Feeding technology of bait fish

[0042] A few days after the mandarin fish fry starts to feed, they can be fed the palatable bait fish crucian carp fry produced under normal temperature pond conditions, and gradually increase the size and quantity of the bait fish fed with the growth of the mandarin fish fry.

[0043]3 days after the mandarin fish fry started to feed, they can be fed to crucian carp fry produced under normal temperature pond conditions, and gradually increase the size and quantity of the feed fish as the mandarin fish fry grows, and feed once every 4-6 hours , The density of bait fish is controlled at 4 to 5 times the number of mandarin fish fry. The mandarin fish fry can reach 3 cm after 20-25 days of cultivation, and then they can be cultivated outside the pond.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Shorten the breeding cycle

Mandarin fish artificial advance propagation method

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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