JP2004357684A - Method for culturing shellfish - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charcoal dye agent for growing cultured shellfishes by preventing adhering and growing marine algae, Barnacles, and the like by applying the agent to the outer peripheral surface of the shellfish. <P>SOLUTION: The shellfish 1 applied with the charcoal dye agent 4 in which charcoal fine particles are mixed with a synthetic resin solvent of nitrogen type or cupper type on the outer peripheral surface of the shell can be cultured in sea water for a long time, owing to the charcoal dye agent 4 applied to the outer surface of the shell. Barnacles, and the like, to be difficult to adhere to the shell. Even when they are going to adhere and grow, the charcoal dye agent applied on the peripheral surface of the shell is slowly dissolved and separated in the sea water during a long period, so they are swept off with the charcoal dye gent 4 and kept in a state of no adhering. During culturing, there is no danger for the shellfish to be killed with the charcoal dye agent, though the agent 4 is applied to the outer peripheral surface of the shell, and the shellfish 1 is not prevented from ingesting nutrients, as the marine algae, Barnacles, and the like, dislike the charcoal dye agent 4 and do not adhere to the peripheral surface of the shell. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for culturing shellfish. It can be used for aquaculture of pearl oysters, oysters, scallops, abalones and turtles.
[0002]
[Prior art]
In the culture of pearl oysters, the pearl oysters are cultivated by suspending them in the sea, for example, by storing them in a net basket or holding them with needles. Since seaweeds and barnacles attach and grow on the peripheral surface of this cultured shellfish, when the amount of these seaweeds increases, the net cages being cultured are pulled out of the sea to remove seaweed and barnacles attached to the shell outer surface. While removing, house again in a net basket and return to the sea for aquaculture.
[0003]
[Problems to be solved by the invention]
During the long-term cultivation, seaweeds and barnacles grow remarkably on the outer peripheral surface of the cultured shell like the pearl mussels, and a great deal of trouble is required to remove them. If the outer surface of the shell is not cleaned, the nutrient intake of the shell is hindered, and the culture is delayed, and the quality of the pearl is deteriorated in the pearl culture.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 is the cultivation of shellfish, wherein a carbon dye agent obtained by mixing fine carbon particles with a nitrogen-based or copper-based synthetic resin solvent is applied to the outer peripheral surface of the shell and cultured in seawater. It is about taking a method. The shellfish coated with the charcoal dye agent is cultured for a long time in seawater, but during this cultivation, the seaweed and barnacles are unlikely to adhere due to the charcoal dye agent applied to the outer peripheral surface of the shell. Also, even if they try to attach and grow, the charcoal dye on the outer peripheral surface of the shell is gradually dissolved and separated into seawater for a long period of time, so that the charcoal dye is washed away with the charcoal dye and maintained in a state where it cannot adhere. During the cultivation, even if these charcoal dyes are applied to the outer peripheral surface of the shell, there is no harm such as being killed by this, and seaweeds and barnacles adhere to the outer perimeter of the shell, disliked the charcoal dye. By not being carried out, it is maintained well without inhibiting the nutrient intake of the shellfish.
[0005]
【The invention's effect】
Cultivation of shellfish is simple because it is performed by applying a charcoal dye agent to the outer peripheral surface of the shell, so during the cultivation, the growth of cultured shellfish is prevented by preventing the growth of seaweeds and barnacles. can do. In addition, since there is no need to perform a work process such as removing seaweeds and barnacles from the shell, labor-saving aquaculture can be carried out, and there is no harm and no pollution of the seawater even if the carbon dye is dissolved in the seawater. Also less.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described. A method of culturing shellfish is characterized in that a charcoal dye obtained by mixing fine carbon particles with a nitrogen-based or copper-based synthetic resin solvent is applied to the outer peripheral surface of the shell and cultured in seawater. For example, when the pearl cultivation is performed using the pearl oyster 1, for example, the pearl nucleus of the pearl oyster 1 is stored, and the pearl oyster 1 is stored in the net basket 2 and cultivated in a state of being suspended in the seawater 3. This process is substantially the same as the conventional one, but this pearl oyster 1 is cultured with the carbon dye agent 4 applied to the outer peripheral surface of the shell. The charcoal dye agent 4 is formed by mixing a charcoal liquid obtained by vinegaring charcoal fine particles with a dye base comprising a nitrogen-based or copper-based synthetic resin solvent. Here, the charcoal is made of bamboo charcoal, charcoal, activated carbon, or the like, and bamboo charcoal or charcoal is used in a finely divided state. As the vinegar, bamboo vinegar, wood vinegar, or the like is used. The synthetic resin solvent used as a dye base contained 20% vinylol and 80% xylol. The blending ratio of the carbon dye agent 4 is, for example, approximately 5 to 10 kg of a coal liquid mixed with approximately 200 l of the dye base in the dye can A. Such a charcoal dye agent 4 disperses fine carbon particles in a solution by high-speed rotation using a disperser.
[0007]
The charcoal dye agent 4 obtained in this manner is applied to the outer peripheral surface of the shell of the pearl oyster 1 and stored in the net basket 2. This net basket 2 is suspended in a raft 6 for aquaculture with a string 5 or the like and is immersed in seawater 3 for aquaculture.
[0008]
The charcoal dye agent 4 applied on the outer peripheral surface of the pearl oyster 1 is gradually dissolved in the seawater 3 by the synthetic resin solvent therein during long-term cultivation. Here, charcoal, vinegar, copper-based or nitrogen-based synthetic resin solvents and the like all have bactericidal properties, disinfecting properties, insect repellent properties, etc., but do not have insecticidal properties or killing properties. Seaweeds and barnacles are unlikely to adhere and grow on the outer peripheral surface of 1, and even if they try to adhere, the carbon dye agent is gradually washed away by the dissociation and can be prevented from adhering.
[0009]
In addition, nutrients can be well taken up by the pearl oysters 1 and cultivation and growth can be improved without the nutrients being intercepted by these attached seaweeds. Further, the charcoal of the charcoal dye agent 4 that dissolves in the seawater is not directly harmful to the growth of the pearl oysters 1, but is not easily polluted even in the seawater and does not cause pollution. Since there is little seaweed and barnacles attached to the pearl oysters 1 during cultivation, there is no need to periodically clean the outer surface of the shell 1 to remove seaweeds, etc., which can save labor. And can efficiently cultivate high quality shellfish.
[Brief description of the drawings]
FIG. 1 is a plan view of a cultured shellfish and a cross-sectional view thereof.
FIG. 2 is a perspective view showing a state of pearl shell culture.
[Explanation of symbols]
1 shellfish 2 basket 3 sea surface 4 charcoal dye agent

Claims (1)

A method for cultivating shellfish, comprising applying a charcoal dye agent obtained by mixing fine carbon particles to a nitrogen-based or copper-based synthetic resin solvent on the outer peripheral surface of a shell and culturing the shellfish in seawater.

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