JPH05252843A - Method for removing organism attached to scallop culturing tool and composition for promoting removal of attached organism - Google Patents

Abstract

PURPOSE:To prevent adhesion of marine organisms to a culture tool for scallops and, even in the case of sticking of the organisms to the culture tool, to simply remove the organisms attached to a culture tool only by washing the culture tool with water without damaging scallops and the culture tool. CONSTITUTION:The surface of a culture tool for scallops is previously provided with a protecting film of a composition for promoting removal of attached organisms. Scallops are dropped in the sea by using the culture tool, grown and pulled up from the sea together with the culture tool. The scallops are taken out, the culture tool is washed with water and the organisms attached to the surface are removed from the culture tool together with the protecting film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the cultivation of scallops,
Work for scallop aquaculture by preventing or reducing the adhesion of marine organisms to the surface of the aquaculture equipment that is drooped into the sea along with the scallops, and making it possible to easily wash off even if the aquatic organisms adhere to the aquaculture equipment. The present invention relates to a method for removing adhering organisms to a scallop aquaculture tool, which enables reduction of time and work effort, and a composition for promoting the adhering organism removal used in the method.

[0002]

2. Description of the Related Art Sprouting of scallops involves the collection of seedlings, intermediate breeding,
Although there are several stages such as main training, in the intermediate training and main training, trunk ropes and drooping ropes with scallops placed in basket nets such as polyethylene pearl net and round basket (Andon basket) are used. Or, a so-called drooping aquaculture method is carried out, in which a seashell is pierced and a hanging thread (Tegus) that is connected to a hanging rope is used to tie and hang it. Usually, this drooping aquaculture is
It consists of two stages, intermediate training and main training, for a total of 17 months.

As described above, in the cultivation of scallops, the cage nets for inserting the scallops and hanging them in the sea, and the aquaculture tools such as trunk ropes and hanging ropes that suspend the cage nets are suspended in the seawater for a long time. Implantation growth of marine organisms on aquaculture equipment is remarkable, which causes various problems.

For example, the intermediate growing is for about 7 months from October to April of the following year, and during this period, a cage net made of polyethylene having a small mesh is used. After this intermediate breeding, before the main training, shellfish are selected and cage nets are washed to remove the attached organisms. Due to the work at this time, the shellfish may be damaged, and the work of cleaning the cage net to remove the adhering marine organisms requires a considerable amount of time and labor and may damage the cage net. In addition, in this training, although the mesh size of the basket net increases, the problem of attached organisms, including hanging facilities, is more serious. This is when the suspension time is 4
From the month to around March of the following year, which lasts longer than the time required for intermediate breeding, the mussels that cultivate scallops compete for food, barnacles, ascidians, bryozoans, sponges, spruce, sea anemones that compete for growth. Breeding season, etc.
This is because it overlaps with the growing season and further impairs the cultivation of scallops. In particular, the attachment of the purple mussels to the cage nets is a cause of growth inhibition of the scallops due to competition for food.

[0005] The amount of marine organisms attached to the cage net reaches a maximum of about 15 kilograms per year for 12 to 13 kilograms of scallops, and also for trunk ropes and hanging ropes that suspend the cage nets. The marine organisms also attach to the hanging facility itself, which increases the weight of the cage net and strengthens buoyancy.
A great deal of effort is required to maintain the facilities. At present, the nets are replaced around October, but this work damages the scallops and the mortality rate is high.

[0006]

In order to solve the problem caused by the adhesion of marine organisms to such scallop aquaculture equipment, an antifouling agent such as a fishing net antifouling agent containing an antifouling chemical is used. It is possible to prevent the attachment of organisms to aquaculture equipment, but due to its nature, shellfish grow in contact with the net, so conventionally known organic tin compounds, heavy metals, or chemical substances with pharmacological activity. The use of antifouling agents including antifouling chemicals such as is inappropriate for environmental hygiene and food hygiene. Further, although silicone oil-based antifouling agents have been proposed as antifouling agents for preventing the adhesion of marine organisms, they are not always satisfactory in terms of the effect of preventing biofouling and the effect of promoting removal of adhered organisms.

In view of the above problems in scallop aquaculture, the present invention prevents marine organisms from adhering to scallop aquaculture equipment as much as possible, and even when these organisms adhere to the aquaculture equipment, the aquaculture is performed. A method for removing adhered organisms which can easily remove organisms attached to aquaculture equipment without damaging scallops or aquaculture equipment simply by washing the equipment, and a composition for promoting adhered organism removal used therefor Is.

[0008]

[Means for Solving the Problems] Regarding the attachment mechanism of marine organisms to the above-mentioned scallop aquaculture equipment, many studies have been conducted from various aspects, and many biofouling prevention methods based on them have been proposed. However, it has not been put to practical use. The present inventors have diligently studied and studied a method for reducing the adherence of organisms by lowering the surface tension of the surface of an aquaculture tool to which organisms adhere, which is one of them. As a result, a composition for promoting removal of organisms, which can form an effective protective film for aquaculture equipment depending on the state of the material on the surface of the aquaculture equipment, and a method for removing organisms using this composition were completed.

That is, the method for removing adhered organisms from scallop aquaculture equipment according to the present invention means that a protective film is formed beforehand on the surface of a scallop aquaculture equipment with a composition for promoting the removal of attached organisms, and the aquaculture equipment is used. After cultivating the scallops by hanging them in the sea, pull the scallops out of the sea together with the aquaculture equipment, and wash the aquaculture equipment after removing the scallops to culture the organisms attached to the surface with the protective film. To remove from the ingredients.

The composition for promoting removal of adhered organisms from scallop aquaculture equipment used in the method for removing organisms of the present invention comprises 100 parts by weight of an organic vehicle, a silicone release agent, a water-soluble lubricant, and a fiber oil agent. Or 1 to 70 parts by weight of one or a mixture of two or more selected from a fluorine-based releasing agent or a fluorine-based fiber oil agent, and 1 to 70 parts by weight of an organic lubricant. It is a thing.

Examples of the organic vehicle used in the composition for promoting removal of adhered organisms include acrylic silicone graft copolymers, room temperature curable silicone rubbers, acrylic acid esters or methacrylic acid esters (in this case, the alkyl portion is methyl). , Ethyl, n- or isobutyl, 2 ethylhexyl, etc.), vinyl chloride, wet-hardening urethane resin, chloroprene rubber, polyester resin, phenol resin, epoxy resin, vinyl acetate resin, etc. The composition is appropriately selected and used in consideration of the material, shape, etc. of the surface of the aquaculture tool for which a protective film is to be formed. The effective factor when selecting this resin is the glass transition point (Tg point), and it is most preferable to select it.

Specific examples of the silicone oil type release agent, water-soluble lubricant, and fiber oil agent include dimethyl silicone oil, methyl hydrogen silicone oil, methylphenyl silicone oil, methyl silicone oil, non-reactive silicone. There are oils (polyether modified, methylstyryl modified, higher fatty acid ester modified, alkylaralkyl polyether modified, etc.) and reactive silicone oils (epoxy modified, carboxyl modified, epoxy polyether modified, etc.). Further, specific examples of the fluorine-based releasing agent and the fluorine-based fiber oil agent include perfluoroalkylethylene oxide adducts, non-dissociative perfluoroalkyl substances, perfluoroalkyl acrylates and the like.

Specific examples of the organic lubricant include liquid paraffin, chlorinated paraffin, tricresyl phosphate, polybutene, and high boiling point organic solvent.

[0014]

In the present invention as described above, the protective film formed on the surface of the scallop aquaculture tool has releasability and water repellency, which makes it difficult for marine organisms to adhere to the surface of the aquaculture tool. Moreover, even if it adheres, the organisms adhere to the protective film formed on the surface of the aquaculture tool, and by removing this protective film by washing the adherent organisms with water, the adherent organisms can be easily removed from the aquaculture device. It can be removed.

[0015]

The present invention will be described in more detail based on the following examples. The present invention is not limited to these embodiments.

The composition shown in Table 1 was used to prepare a composition for promoting the removal of attached organisms according to the present invention. Next, the dried net portion of the scallop cage cage net was immersed in the composition for promoting the removal of adhered organisms, and a protective film was formed on the surface of the composition. The cage net formed with this protective film is immersed in the sea off Osaka Bay at a water depth of about 1.0 meters for 5 months, and the state of attachment of marine organisms over time is observed and the cage net is removed from the sea after 5 months. It was pulled up and washed with a stream of water, and the state of removal of attached organisms was examined. As a comparative example, an untreated cage net was also immersed in the sea at the same time to examine the state of organism attachment and the state of removal of attached organisms by washing with water.

[0017]

[Table 1]

[0018]

[Table 2]

As is clear from the results shown in Table 2, according to the present invention, the adhesion of marine organisms is reduced as compared with the case of being immersed in the sea without any treatment, and in the case of no treatment. In contrast to the fact that attached organisms cannot be removed only by washing the aquaculture tool with water, according to the present invention, even if an organism attaches to the aquaculture equipment, it can be easily removed by washing with water.

[0020]

As described above, according to the composition for promoting removal of attached organisms of the present invention and the method for removing attached organisms using the composition, the attachment of marine organisms to aquaculture equipment used for culturing scallops can be prevented. In addition to making it difficult, even if organisms adhere, it can be easily removed by washing with water,
The work time can be shortened, the work effort can be reduced, and damage to the scallop and the aquaculture tool associated with the work can be prevented. Further, the composition for promoting removal of adhered organisms does not use an antifouling chemical such as an organotin compound or a heavy metal, or a chemical substance having a pharmacological activity, and is therefore grown in a state of being in contact with an aquaculture tool such as a basket net. It can be said that this is the most suitable method for removing extraneous matter in the cultivation of scallops.

Claims (2)

[Claims] 1. A scallop shell is cultured on the surface of the scallop shell aquaculture device in advance with a composition for accelerating the removal of attached organisms. By attaching the shellfish out of the sea and washing the aquaculture equipment after taking out the scallop, the organism attached to the surface of the aquaculture equipment is removed from the aquaculture equipment together with the protective film. Removal method. 2. One or more selected from a silicone release agent, a water-soluble lubricant, a fiber oil agent, or a fluorine release agent or a fluorine fiber oil agent in 100 parts by weight of an organic vehicle. 1 to 70 parts by weight of a mixture of
And 1 to 70 parts by weight of an organic lubricant, a composition for accelerating the removal of adhering organisms to scallop aquaculture equipment.