Method for obtaining normal mature sperm of eel

A technology of mature sperm and eel, which is applied in the field of obtaining normal mature sperm of eel, can solve the problems of mysterious disappearance of eel, difficult survival of eel seedlings, and influence on the survival rate of seedlings, and achieve the effect of ensuring the quality of sperm

Inactive Publication Date: 2009-06-24
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To achieve full artificial reproduction of eels, we must first start with obtaining normal sperm and eggs. Since the sexual maturity and reproduction of eels are completed in the ocean, the eels mysteriously disappeared after entering the sea. So far, we have not been able to obtain eels to lay eggs naturally. Naturally mature sperm and eggs
[0005] At present, people rely on exogenous hormones such as carp pituitary, ...

Method used

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Embodiment Construction

[0009] In the middle and late November of each year, the collected eel parents are put into the cement pond. According to the habit of eel's nocturnal appearance, the cement pond is shaded with a shading net or plastic foam during the day, so as to completely avoid light, and the shading net is opened at night. Let the eel bathe in the moonlight and stimulate the flow of water at the same time, let the eel do reproductive migration in the pond, and conduct food attraction and domestication. After the eel is fed for 15 days, the salinity domestication is carried out; the eel parent needs to go through osmotic pressure and physiological conditions to enter the seawater from fresh water. The adjustment of the whole process requires a certain time to adapt to seawater; the salinity acclimation gradually transitions from low concentration to high concentration, and finally enters seawater, that is, starting from fresh water, the salinity increases to 5‰, and the salinity increases ev...

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Abstract

A method of obtaining normal mature sperms of eel relates to a method of obtaining normal mature sperms of eel requiring manual adjusting and controlling to obtain normal mature sperms of eel. The invention comprises: performing backgrounding domestication and food calling on the received catadromous eel parent, causing wild eel to adapting manual breeding environment, increasing corporeity of the eel parent through food calling, storing more matter and energy, preparing for entering the seawater, characterized in that, the eel parent is performed with salinity domestication after being bred for 15 days under manual breeding environment, salinity domestication is transferred from low concentration to sea water; water temperature of a culture pond for the eels is controlled between 18 to 25 DEG C, light is shielded in the day and moonlight is seen at night, flowing water stimulation is performed at night, oxygen concentration in the water keeps more than 6 mg/l, in weak alkalinity water, content of ammonia and nitrogen is not more than 0.02 mg/l and 0.05 mg/l, eel males discharge seminal fluid naturally, normal mature sperms are obtained. The invention is used for fully artificial propagation for the eels.

Description

technical field [0001] The invention relates to a method for obtaining normal mature spermatozoa of eel under the condition of artificial regulation (ripening and labor without exogenous hormone). Background technique [0002] Eel (Anguilla japonica) belongs to the order Eel and Eelidae. It is a kind of migratory fish. It lives in two completely different living environments, freshwater and seawater. The reproductive groups are descended from rivers to the sea for reproductive migration in autumn and winter every year. , the gonads develop and mature during the migration after entering the sea, and reach the spawning ground to reproduce. Every winter, flocks of young eels enter the estuary from the ocean, travel upstream, reach the middle and upper reaches and enter the water bodies attached to the rivers and lakes to inhabit, grow and fatten until they reach sexual maturity and begin to migrate to the sea to complete a life process. [0003] The artificial reproduction of ...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 章龙珍乔振国庄平黄晓荣刘鉴毅张涛冯广朋赵峰
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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