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Method for separating seedling eggs after hatching of fertilized eggs of loach

A separation method and fertilized egg technology, which is applied in the field of loach fertilized egg incubation, can solve the problems of loach seedling survival rate threat, easily entangled loach seedlings, and easy to deteriorate water quality, so as to save labor time, reduce labor consumption, and improve survival rate Effect

Inactive Publication Date: 2011-12-28
湖北省水产科学研究所
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  • Abstract
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Problems solved by technology

If it is not separated, firstly, it is easy to entangle the newly hatched loach seedlings, and secondly, it is easy to spoil the water quality, consume dissolved oxygen, and produce many harmful substances, which poses a huge threat to the survival rate of loach seedlings.
At present, the survival rate of loach seedlings in this link of artificial propagation is only 50% to 55%.

Method used

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  • Method for separating seedling eggs after hatching of fertilized eggs of loach

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Embodiment Construction

[0019] Below in conjunction with embodiment describe in detail:

[0020] 1. The refinement of this method

[0021] In step ①, the "majority" refers to more than 90% and less than 100%; the "complete film production" refers to 100%.

[0022] In step ②, the "appropriate amount" refers to 5-10ppm.

[0023] 2. Specific experiments and results

[0024] From April to June every year, our institute will carry out the artificial breeding of loach. This method has been tested many times in the loach breeding ground of our institute.

[0025] 3. Experimental results

[0026] 1. Statistics on 4-year hatching rate

[0027] time (year)

2006

2007

2008

2009

Fertilization rate (%)

81.1％

83.2％

83.5％

84.6％

[0028] 2. Statistics on hatching rate in June 2009

[0029]

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Abstract

The invention discloses a separation method of fries and roes after hatching of loach fertilized roes, which relates to a loach fertilized roe hatching technology and comprises the following steps: (1) carrying out separation when mostly of or all loaches break through a membrane; and (2) adding a proper amount of trypsinase in a fry culture water body. The separation method quickly dissolves roemembranes and necrotic roes, prevents the roe membranes and the necrotic roes from winding fries, reduces the mortality rate of the fries, quickly separates the fries from other sundries, saves the labor time, improves the survival rate of the dries, reduces the consumption of the roe membranes and the necrotic roes on dissolved oxygen in the water body, keeps dissolved oxygen in water body adequate, reduces the labor consumption of the fries in the hatching process and improves the labor efficiency.

Description

technical field [0001] The invention relates to a loach fertilized egg hatching technology, in particular to a method for separating seedling eggs after the loach fertilized eggs hatch. Background technique [0002] Loach is a traditional export aquatic species in my country, mainly exported to South Korea, Japan, Taiwan, Hong Kong and Southeast Asia. In the past ten years, the price of loach has been increasing year by year, and the highest price in 2008 was 64 yuan / kg. [0003] After the loach fertilized eggs hatch, the loach seedlings have poor swimming ability and cannot swim horizontally. They need to stay in the hatching pond or the ring road for 1 to 2 days before they can go out of the ring; and the 2 days of staying are an important dangerous period. After the loach fertilized eggs hatch, there are a large number of egg membranes and necrotic fish eggs in the water. They are often mixed with the just hatched loach seedlings, and it is very difficult to separate the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 印杰陈小奇雷晓中李金钟李圣华张亮
Owner 湖北省水产科学研究所
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