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Artificial regulatory method for increasing female rice field eel fecundity

A technology of fecundity and rice field eel, which is applied in the field of artificial regulation to increase the fecundity of rice field eels and female eels, can solve the problems of sharp reduction of natural seed resources, idle cages, and shortage of rice field eel seedlings, etc.

Inactive Publication Date: 2008-01-16
HUAZHONG AGRI UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to overfishing, natural seed resources have declined sharply. In some places, rice field eel seed is in short supply, and even many net cages are idle, reaching the point where there are no seedlings to raise.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1. Artificially simulate the breeding environment for the development of female eels

[0023] 1) Pond selection: choose an area of ​​1000-5000m 2 , the east-west is rectangular, the aspect ratio is 2:1, and the pond with a water depth of 1.5m is a breeding pond for the growth of female eels. The water quality of the pond is required to be pollution-free and meet the national fishery breeding water quality standards.

[0024] 2) Clear pond and disinfection: according to every 1000m 2 Use 100kg of quicklime to clear the pond with 20cm of water to kill the harmful organisms in the pond. After 3 days, take out the old water, filter it with a 30-mesh sieve and fill it with new water to a depth of 1.5m.

[0025] 3) The setting of the female eel cultivation box: the female eel is cultivated in a cage, the size of which is 4m×2m×1.5m, sewn with 16-mesh polyethylene mesh, and the cage is fixed in the pond with moso bamboo. The upper mouth is 0.6m away from the water surface, a...

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Abstract

The invention belongs to the aquaculture technology field, in particular relating to an artificial control method for the improvement of female finless eel parent fecundity. The finless eel has special physiological phenomena and sex reversal characteristics with small size, large egg granules and low fecundity. Thus the scale finless eel propagation is subject to the restrictions of the female finless eel parent self-conditions. In the invention, through the artificial simulation of female finless eel culture and development environment, the rational selection of parental finless eels, the reasonable stocking density arrangement, the appropriate feeding and management methods, the pre-oviposition period intensive culture and the artificial control measures, the female finless eel fecundity in natural state can be enhanced to the fecundity up to 450 to 1300 grains each and the 680 grains average level from 170 to 650 grains each and the average 260 grains. Therefore, the average fecundity of finless eel is improved by 161%.

Description

technical field [0001] The invention belongs to the technical field of freshwater aquatic product cultivation, in particular to the technical field of artificial breeding of rice field eels, and relates to an artificial control method for increasing the fecundity of female rice field eels. Background of the invention [0002] Swamp eel is an important cultured fish in China. Intensive cage eels are flourishing all over the country, such as Wuxi City in Jiangsu Province, Nanchang City in Jiangxi Province, Anqing City in Anhui Province, Huzhou City in Zhejiang Province, Yueyang City in Hunan Province, Xiantao City in Hubei Province, Cage eel farming in Qianjiang City, Honghu City, Tianmen City and other areas has become the leading industry in the local fishery, and the annual output value has exceeded 100 million yuan in most areas. [0003] However, at present, most eels are raised in the enclosure using local natural wild eel seedlings, which are cultivated through artifici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A23K1/18A23K10/22A23K20/158A23K50/80
CPCY02A40/81
Inventor 龚世园储张杰何绪刚江景坡郭灿灿王松
Owner HUAZHONG AGRI UNIV
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