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A device and method for increasing the hatching rate of meretrix meretrix

A technology of hatching rate and clams, which is applied in the direction of climate change adaptation, application, fish farming, etc., can solve the problems affecting the hatching rate of fertilized eggs, damage of fertilized eggs, increase of deformed individuals, etc., achieve good application prospects, reduce production costs, The effect of increasing the hatching rate

Active Publication Date: 2021-07-02
INST OF OCEANOLOGY & MARINE FISHERIES JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, especially when the gonads of the bromophilus are very full, the number of sperm is not easy to control, and it is easy to form polyspermia into eggs, which will increase the number of deformed individuals. embryonic development
[0003] At present, the commonly used method in production is to wash eggs multiple times to remove eggs with slow sedimentation speed and excess sperm. This method is theoretically feasible, but it is time-consuming and labor-intensive in actual operation, and the operation will damage the fertilized eggs, seriously affecting the fertilized eggs. Hatch rate

Method used

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  • A device and method for increasing the hatching rate of meretrix meretrix
  • A device and method for increasing the hatching rate of meretrix meretrix
  • A device and method for increasing the hatching rate of meretrix meretrix

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Embodiment 1

[0030] like Figure 1-Figure 3 As shown, the present embodiment provides a device for improving the hatching rate of meretrix meretrix, comprising an oxytocin rack 1, a seedling tank 2, an incubation pool 3, a siphon 4 and a glare flashlight 5, and the oxytocin rack 1 consists of a stainless steel pipe 7, a side surface The plastic flat net 8, the bottom plastic flat net 9 and the cylindrical stainless steel structure 10 are composed; wherein, the two ends of the stainless steel tube 7 pass through the mesh contour of the uppermost edge of the side plastic flat net 8 in parallel; the oxytocin frame 1 passes through the stainless steel tube 7 It is mounted on the seedling production tank 2, and the seedling production tank 2 is connected to the hatching pool 3 through the siphon 4.

[0031] The stainless steel pipe 7 has a diameter of 6mm and a length of 1.2m.

[0032] Described side plastic flat net 8 is aperture 8mm, and net thick 4mm polyethylene plastics.

[0033] Describ...

Embodiment 2

[0040] On July 22 of a certain year, the Jiangsu Province Meretrix meretrix breeding field. The gonad-mature clams with an average shell length of 39 mm were used as broodstock. At 9:00 in the morning of the same day, 20kg of baby shellfish were sent to an air-conditioned room (room temperature: 20°C) to dry in the air. Move out of the air-conditioned room at 12:00 on July 23, stimulate with 0.15‰ ammonia water for 30 minutes, rinse with fresh sand and seawater and put them in the oxytocin rack 1, put 5 kg broccoli in each oxytocin rack 1, and put 1 oxytocin rack in the seedling tank 2 superior. Inject fresh sand-filtered seawater into the seedling-producing tank 2, and submerge the parent shellfish by 20-30 mm. After treating the seawater in this tank with 5-8ppm EDTA, use the air stones on the 3rd side of the hatching tank to aerate for 0.5h. Stop breathing at 13:10 and observe. At 13:20, it was found that the male parent in the oxytocin frame 1 began to ejaculate, which ...

Embodiment 3

[0042]On July 28 of a certain year, the Jiangsu Province Meretrix meretrix breeding field. The gonad-mature clams with an average shell length of 42 mm were used as broodstock. At 18:00 in the afternoon of the same day, 22.5kg of baby shellfish were sent to an air-conditioned room (room temperature: 19°C) to dry in the air. Move out of the air-conditioned room at 6:00 on July 30, stimulate with 0.15‰ ammonia water for 30 minutes, rinse with fresh sand and seawater and put them in the oxytocin rack 1, put 5 kg broccoli in each oxytocin rack 1, and put 1 oxytocin rack in the seedling tank 2 superior. Inject fresh sand-filtered seawater into the seedling-producing tank 2, and submerge the parent shellfish by 20-30 mm. After treating the seawater in this tank with 5-8ppm EDTA, use the air stones on the 3rd side of the hatching tank to aerate for 0.5h. Stop breathing at 7:10 and observe. At 7:30, it was found that the male parent in the oxytocin frame 1 began to ejaculate, which...

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Abstract

The invention relates to a device and a method for improving the hatching rate of clams. The device comprises an induction rack (1), a seedling tank (2), an incubation pool (3), a siphon (4) and a strong light flashlight (5). The frame (1) is composed of a stainless steel tube (7), a side plastic flat net (8), a bottom plastic flat net (9) and a cylindrical stainless steel structure (10). The invention avoids the time-consuming and cumbersome operation of egg washing in production, significantly improves hatching rate, saves time and labor, reduces production cost, improves economic benefit, and has wide application prospect in the aspect of artificial seedling breeding of clams.

Description

technical field [0001] The invention belongs to the technical field of seafood production, and in particular relates to a device and method for improving the hatching rate of clams. Background technique [0002] Clams (Meretrix meretrix) are the main cultured species in shallow seas, tidal flats and ponds. The seedlings in natural sea areas cannot meet the production needs, so it is urgent to carry out artificial breeding of meretrix meretrix. Under normal circumstances, the ratio of male to female in clam broodstock is 1:1, and male and female cannot be distinguished from appearance. Meretrix meretrix is ​​fertilized by single sperm, so there should not be too many sperm during fertilization. Generally, only a few sperm actively surround the egg. However, in actual production, especially when the gonads of the bromophilus are very full, the number of sperm is not easy to control, and it is easy to form polyspermia into eggs, which will increase the number of deformed indiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/54A01K63/00A01K63/04
CPCY02A40/81
Inventor 陈爱华吴杨平姚国兴张雨曹奕张志伟张曹进陈素华
Owner INST OF OCEANOLOGY & MARINE FISHERIES JIANGSU
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