Oocyst hatching method and hatching device for a kind of melon snail

Abstract

The invention relates to an oocyst incubation method for whelks, and belongs to the technical field of aquaculture larval rearing. The method is as follows: removing the oocysts of the whelks to an incubation basket; placing the incubation basket (3) in an incubation pool (5) for incubating, wherein the incubation basket is made of the polyethylene plastic, 50 cm long, 30 cm wide, and 25 cm high, the interior is covered by 60 meshes of bolting-silk net, the bottom is leveled, two edges of the upper end of the incubation basket are bound with rigid foam (7) so that the basket is floated on the water surface; placing an inflating device (4) on the bottom of the incubation basket for inflating slowly, wherein the upper part of the incubation basket is provided with a flowing device (1) made of polyvinyl chloride (PVC) pipes, the water is flowed from a flowing hole (2), and the water discharge is 7-8 L / minute; and incubating by using the flowing water. The method is capable of achieving the artificial incubation of whelks, and providing the feasible approach for large-scale production of whelks, and has the advantages of simple and convenient technology, high incubation rate, and low production cost.

Description

technical field

[0001] The invention belongs to the technical field of seed cultivation of aquaculture, and in particular relates to an artificial hatching method of melon snail oocysts. Background technique

[0002] Melon snail, scientific name: Cymbium melo, English name: Whelk belongs to the mollusk phylum, gastropod class, neogastropod order, vortex family. Produced in Sanya, Lingshui, Danxian, Lingao, Qionghai and Wenchang coasts of Hainan Island, and found in Taiwan, Fujian and Guangdong coasts of my country. The shell is large, nearly spherical. The shell height is 154.0mm. Shell width 105.0mm. The helix is ​​low and small, almost completely submerged in the body whorl when the adult is adult, and the body whorl is extremely enlarged. There are fine growth lines on the shell surface. Lives on muddy seabeds at depths of several meters. Carnivorous, dioecious, spawning period from April to May, horny oocysts are yellowish brown, long oval, with one egg per snail, ...

Examples

Embodiment 1

[0021] The invention discloses a method for hatching oocysts of snails, which comprises the following steps: before hatching oocysts of snails, the used utensils need to be sterilized with potassium permanganate solution. Open the water inlet and inflation valves, add water to the glass fiber reinforced plastic pool to the height of the PVC pipe at the drain outlet, and then place the hatching basket in the glass fiber reinforced plastic pool. Move the oocysts after the snails lay eggs to the hatching baskets that have been placed in the glass fiber reinforced plastic pool. The hatching pool 5 uses a 3m*1.5m*0.8m rectangular glass fiber reinforced plastic pool with a water depth of 0.6m. 0.65m, internal diameter is the drainage pipe 6 (PVC pipe) of 2.5cm, in order to maintain water level at 0.6m; Incubation basket 3 is polyethylene plastic material, and specification is length 50cm, width 30cm, basket height 25cm, hatch basket upper opening, The surrounding and bottom are mesh...

Embodiment 2

[0029] The snail hatching device is made up of a hatching tank 5, a flow device, an aeration device and a hatching basket 3, wherein the hatching basket is placed in the hatching pool. The hatching pool is a 3m*1.5m*0.8m rectangular FRP pool. The wall of the hatching pool is smooth without unevenness. The water inlet reaches 0.6m. It is the drainage pipe 6 (PVC pipe) of 2.5cm; The hatching basket is a polyethylene plastic material, and the specification is length 50cm, width 30cm, basket height 25cm, hatching basket top opening, all around and the bottom are mesh shape, and the mesh size is 4cm 2Left and right, the hatching pool provides a stable water environment for the hatching of snails. The water level is determined to be 0.6m according to the height of the hatching pool and the hatching basket, which is more suitable. If the water level is too shallow or too deep, it is not conducive to water exchange. The inside of the basket is covered with a 60-mesh sieve silk Net, t...

technical field

[0001] The invention belongs to the technical field of seed cultivation of aquaculture, and in particular relates to an artificial hatching method of melon snail oocysts. Background technique

[0002] Melon snail, scientific name: Cymbium melo, English name: Whelk belongs to the mollusk phylum, gastropod class, neogastropod order, vortex family. Produced in Sanya, Lingshui, Danxian, Lingao, Qionghai and Wenchang coasts of Hainan Island, and found in Taiwan, Fujian and Guangdong coasts of my country. The shell is large, nearly spherical. The shell height is 154.0mm. Shell width 105.0mm. The helix is ​​low and small, almost completely submerged in the body whorl when the adult is adult, and the body whorl is extremely enlarged. There are fine growth lines on the shell surface. Lives on muddy seabeds at depths of several meters. Carnivorous, dioecious, spawning period from April to May, horny oocysts are yellowish brown, long oval, with one egg per snail, ...

Examples

Embodiment 1

[0021] The invention discloses a method for hatching oocysts of snails, which comprises the following steps: before hatching oocysts of snails, the used utensils need to be sterilized with potassium permanganate solution. Open the water inlet and inflation valves, add water to the glass fiber reinforced plastic pool to the height of the PVC pipe at the drain outlet, and then place the hatching basket in the glass fiber reinforced plastic pool. Move the oocysts after the snails lay eggs to the hatching baskets that have been placed in the glass fiber reinforced plastic pool. The hatching pool 5 uses a 3m*1.5m*0.8m rectangular glass fiber reinforced plastic pool with a water depth of 0.6m. 0.65m, internal diameter is the drainage pipe 6 (PVC pipe) of 2.5cm, in order to maintain water level at 0.6m; Incubation basket 3 is polyethylene plastic material, and specification is length 50cm, width 30cm, basket height 25cm, hatch basket upper opening, The surrounding and bottom are mesh...

Embodiment 2

[0029] The snail hatching device is made up of a hatching tank 5, a flow device, an aeration device and a hatching basket 3, wherein the hatching basket is placed in the hatching pool. The hatching pool is a 3m*1.5m*0.8m rectangular FRP pool. The wall of the hatching pool is smooth without unevenness. The water inlet reaches 0.6m. It is the drainage pipe 6 (PVC pipe) of 2.5cm; The hatching basket is a polyethylene plastic material, and the specification is length 50cm, width 30cm, basket height 25cm, hatching basket top opening, all around and the bottom are mesh shape, and the mesh size is 4cm 2Left and right, the hatching pool provides a stable water environment for the hatching of snails. The water level is determined to be 0.6m according to the height of the hatching pool and the hatching basket, which is more suitable. If the water level is too shallow or too deep, it is not conducive to water exchange. The inside of the basket is covered with a 60-mesh sieve silk Net, t...

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