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Manual grow seedlings method of Rapana venosa spat

A snail and artificial technology, applied in the field of artificial seedling cultivation of snails, can solve the problems of difficult feed conversion, low seedling emergence, and low survival rate in indoor artificial seedling cultivation, and achieve the effects of less disease, high survival rate and fast growth

Active Publication Date: 2011-01-12
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the problems of difficulty in transforming bait for indoor artificial seedling raising, feeding carnivorous surimi to pollute water quality, causing low survival rate and low seedling emergence, and the seedling emergence is increased by more than 60% compared with indoor artificial seedling raising

Method used

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Embodiment Construction

[0007] When implementing the method for the artificial seedling cultivation of the red snail of the present invention, at first in the breeding season of the red snail, select the healthy, non-injured, active snail as the seed shell, and press 20-30 / m 3 Put it in the nursery pond, feed the clams and mussels on a regular basis, change the water and clear the bottom every day, continuously inflate and keep the light dark, and the red snails will mate and lay eggs after 5-6 days, and enough eggs will be produced. After the oocysts, the red snails were removed. Secondly, the oocysts hatched at 22-24°C for 18-22 days and the vega larvae floated in the water. The oocysts gradually changed from milky yellow to gray-black. After all the larvae hatched, the oocysts were white, At the end, after selection and cultivation at a density of 0.3-0.5 per milliliter, change the water 1-2 times a day, feed flat algae, golden algae and other unicellular algae 2-3 times, under the water temperatu...

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Abstract

The invention relates to a manual grow seedlings method of Rapana venosa spat, which is characterized by comprising the following steps: firstly selecting parent Rapana venosa; feeding the parent Rapana venosa, changing water, cleaning up the bottom, continuously aerating and keeping the environment dark every day; mating the Rapana venosa 5-6 days later, and removing the parent Rapana venosa after enough oocysts are produced; then hatching the oocysts at a water temperature of 22-24 DEG C for 18-22 days under veliger larvae come out, selecting better ones, and breeding in a pond at a density of 0.3-0.5 per milliliter; changing water and feeding the veliger larvae every day; after 18-20 days, placing the veliger larvae on a polyethylene corrugated plate and a polyethylene collector bag attaching base at a water temperature of 22-24 DEG C; and finally, moving the attached young Rapana venosa having 3-4 whorls after metamorphosis into a purse net of an outdoor pond or a floating net cage, or moving into a floating net cage arranged on the sea, and stripping the Rapana venosa for aquaculture after the Rapana venosa grows to 5mm. The invention solves the problem of low spat survival rate in the indoor manual spat breeding, lowers the production cost and is environment friendly. Besides, the produced spat are robust and grow fast.

Description

technical field [0001] The invention relates to a method for producing seedlings of red snails, in particular to a method for artificial seedling cultivation of red snails. Background technique [0002] Rapana Venosa, also known as red snail, is a unique economic shellfish that lives along the coast of the Yellow Sea and the Bohai Sea. Its shell is hard and thick, carnivorous, and bivalves are its main food. The most suitable water temperature for growth is 19-26°C . The feet of the snails are particularly large, the meat is fresh, tender, and rich in nutrition. In addition to being eaten fresh, it can also be processed into canned food for export. The shell is also a special raw material for handicrafts and medicine, and its market prospect is broad. [0003] At present, my country's red snail seedlings are still in the experimental stage. With the expansion of the breeding scale, there is more and more demand for red snail seedlings. Since the red snail is a carnivorous s...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 于瑞海李琪王昭萍
Owner OCEAN UNIV OF CHINA
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