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Elimination method of deformed fry of hybrid progenies of female and male chrysanthemum chrysanthemum

A male and female technology, which is applied in the field of culling of deformed fry of hybrid offspring of female yellow cattail and male river cattail, achieves the effects of high culling rate, low equipment requirements and simple operation.

Active Publication Date: 2020-01-10
湖州市水产技术推广站 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is that it is difficult to separate the deformed seedlings by flushing water in the incubation tank after the film is released.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for removing deformed fry suitable for hybrid offspring of female yellow cattail and male river yellow cattail comprises the following steps:

[0020] 1. After the fertilized fish eggs are debonded with mud, they are hatched in the hatching tank with running water: maintain proper hatching conditions, control the water temperature at 28°C, keep the dissolved oxygen at 5 mg / L, and keep the pH at 7, and control the water flow to keep the fish eggs The fish fry that have just emerged from the film are taken out of the hatching container with water and placed in the pre-prepared 18m 2 The fry holding pool is stocked with 1.5 million fish. The converted density is 80,000 tails / m2.

[0021] The layout of the holding pond: the area of ​​the fry holding pond is 18m 2 , the depth is 50cm; the bottom of the pool is paved with white tiles, the size of the tiles is 40cm×25cm. Set two PVC pipe water inlets with a diameter of 100 mm on the upper part of one side wall of t...

Embodiment 2

[0026] A method for removing deformed fry suitable for hybrid offspring of female yellow cattail and male river yellow cattail comprises the following steps:

[0027] 1. After the fertilized fish eggs are debonded with mud, they are hatched in the hatching tank with flowing water: maintain proper hatching conditions, control the water temperature at 23°C, keep the dissolved oxygen at 8 mg / L, and keep the pH at 7.5, and control the water flow to keep the fish eggs No sinking and accumulation shall prevail; the fish fry that have just emerged from the film are taken out of the hatching container with water, and put into the pre-prepared fry holding pond, and the stocking density is 100,000 fish / m 2 .

[0028] The layout of the holding pond: the area of ​​the fry holding pond is 25m 2 , depth 50cm; white tiles are laid on the bottom of the pool. Set two PVC pipe water inlets with a diameter of 100 mm on the upper part of one side wall of the cement pool, and set a PVC pipe outl...

Embodiment 3

[0033] A method for removing deformed fry suitable for hybrid offspring of female yellow cattail and male river yellow cattail comprises the following steps:

[0034] 1. Temporary cement pond for fish fry: the area of ​​the cement pond is 20 m 2 , the depth is 60cm; the bottom of the pool is laid with white ceramic tiles, and the tiles are required to be resistant to water immersion. The bottom of the pool is inclined by 0.3% from the water inlet to the water outlet. The bottom of the corresponding other end is provided with a PVC pipe with a diameter of 100 mm shared by water outlet and seedling emergence to lead to the drainage channel; the height of the drainage PVC pipe is 35 cm, and the upper mouth is wrapped with a single layer of 40-mesh tulle bag to filter the water. The other two sides of the cement pool are equipped with inflatable pipes, and the inflatable sand head is 3 / m 2 set up.

[0035] 2. The time point when the first-generation fry hatch and enter the fry s...

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Abstract

The invention belongs to the technical field of artificial reproduction of fish fry, and discloses a method for removing female pseudobagrus fulvidraco and male pseudobagrus fulvidraco hybrid offspring deformed fry. The method comprises the following steps that 1, fry are temporarily raised in a cement pool; 2, micro flowing water is kept in the temporary raising pool, an uninterrupted inflation state is kept, and temporary raising is carried out for 70-75 hours; 3, the fry which are scattered, not clustered and float after gradually dying are directly removed, the fry in a clustered state are taken out through tulle or siphon or the fry are directly centralized in a fry box from a drainage opening to be taken out, and a fry culture stage is executed. According to the method, the female pseudobagrus fulvidraco and male pseudobagrus fulvidraco hybrid offspring deformed fry are removed, operation is easy, the requirement on equipment is low, and the removal rate is high.

Description

technical field [0001] The invention belongs to the technical field of artificial reproduction of fish fry, and relates to a method for eliminating deformed fry, in particular to a method for eliminating deformed fry of hybrid offspring of female yellow catfish and male river yellow cattail. Background technique [0002] Pelteobagrus fulvidraco is a small fish without intermuscular spines. Its meat is tender, delicious and nutritious, and it can be supplied fresh all year round. Its meat content is relatively high, with an average of 67.53%, protein content of 15.37%, total amino acid content of 14.19%, and essential amino acid content of 5.87%. It also has health effects such as anti-inflammatory and analgesic. It is one of the high-quality freshwater fish that people especially like to eat. one. [0003] Because there are obvious differences in the growth of male and female of the yellow catfish, the male body is more than twice as fast as the female body, especially afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10
CPCA01K61/00Y02A40/81
Inventor 周志金胡大雁费志平
Owner 湖州市水产技术推广站
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