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