JP2002335804A - Breeding device of aquatic living and method for breeding the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To breed aquatic livings at a low cost without wasting an used article. SOLUTION: This breeding device of the aquatic livings is characterized by installing a biodegradable attaching tool 5 used in an early half of production of seedlings and a biodegradable net state protecting tool 6 arranged as surrounding the attaching tool 5, wherein the biodegradable attaching tool 5 is a formed article for attaching larvae of the aquatic life and the biodegradable net state protecting tool 6 is a net bag or net basket for hanging in water used at least in a latter half of production of the seedlings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the production of marine products such as shellfish, sea cucumbers and sea urchins having an attachment period (the period of attachment to a base) during the first half of seed production (including for stocking and aquaculture) and seed production. The present invention relates to a breeding apparatus and a breeding method for marine products used in the latter half.

[0002]

2. Description of the Related Art As is well known, aquatic products such as shellfish, sea cucumber and sea urchins, after laying eggs, fertilizing and hatching, go through a floating stage, and turn into stones, sand, shellfish (including raw shellfish), seaweeds and other objects. It has the property of adhering and securing itself from waves or external enemies by fixing itself.

[0003] In producing these seedlings, their properties are utilized, and at present, corrugated or pack-like molded products mainly made of olefin-based general-purpose plastics such as polyethylene and polystyrene are used as an adhesion base material. I have.

Conventionally, in producing seedlings of aquatic products such as shellfish, sea cucumber and sea urchins, generally, they are first grown from an egg collecting and hatching to a floating stage infant in a land tank, and then corrugated or packed. Is dropped into a water tank, and the infants that have reached the attachment stage are attached. Next, keep them in a water tank,
For release or aquaculture seedlings, some marine products are grown in aquariums until they reach a certain size. Drops and grows in the sea of nature.

[0005] This means that an artificially cultured biological feed (including animal and vegetable) or an artificial feed (combined fertilizer) is adapted from the artificial management to the natural management including the meaning of adapting to the natural environment. ing. After drooping, the plants are grown in the sea for a certain period of time, and after they reach a certain size, they are sequentially taken out of the molded product, and then cultivated at the next stage or used as seeds for stocking or aquaculture.

By the way, the corrugated or pack-shaped molded product used during the seedling production and the intermediate growing period in the latter half of the seedling production is treated as waste. There is a problem that the constituent plastic material cannot be easily incinerated unless the temperature is high. Also, when removing the seedlings from the molded product, the seedlings may be damaged or die, so that the removing operation must be performed carefully and it takes more time than necessary. Furthermore, when the seedlings are removed and released, the possibility that they will be damaged by damage before sinking to the sea floor increases, which leads to a reduction in the release effect and productivity.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a biodegradable appressor used in the first half of the production of aquatic products and seedlings, and a biodegradable appressor outside the biodegradable appressor. A biodegradable net protector arranged so as to surround the applicator, wherein the biodegradable applier is a molded product for attaching a baby product of aquatic products, and the biodegradable net protector is An object of the present invention is to provide a low-cost aquatic product cultivation apparatus without disposing of molded products as waste by configuring a net bag or net basket for underwater droop used at least in the latter half of seed and seedling production. And

Further, the present invention provides a biodegradable applicator used in the first half of the production of seeds of aquatic products, and a biodegradable applicator used at least in the latter half of the production of the seeds and arranged outside the applicator so as to surround the applicator. A method of growing aquatic products using a growing device equipped with a biodegradable net protector for underwater drooping, in the first half of seedling production, attaching a baby of the aquatic product to the biodegradable applicator. By the step of growing the pups, and in the latter half of the production of seedlings, by a configuration comprising a step of growing a marine product using the biodegradable net protector,
An object of the present invention is to provide a method for growing a low-cost marine product without disposing of a molded product as waste.

[0009]

Means for Solving the Problems A first invention of the present application is to provide a biodegradable applicator used in the first half of production of aquatic products,
A biodegradable mesh protector disposed outside the biodegradable applicator so as to surround the applicator, wherein the biodegradable applicator is a molded product for attaching a baby product of a marine product. The biodegradable net-like protective device is an apparatus for growing aquatic products, wherein the device is a net bag or a basket for hanging under water used at least during the latter half of seedling production.

[0010] The second invention of the present application is directed to a biodegradable applicator used in the first half of the production of aquatic products and seedlings, which is arranged outside the biodegradable applicator so as to surround the applicator. It is a method of growing a marine product using a breeding apparatus equipped with a biodegradable net protector for underwater droop sometimes used, and in the first half of seedling production, the larva of the marine product on the biodegradable appressorium And a step of growing a marine product using the biodegradable net-like protective device in the latter half of the production of seeds and seedlings.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In the present invention, a biodegradable aliphatic polyester, a modified aromatic polyester, a polysaccharide, polyvinyl alcohol, or the like is used as a material for the biodegradable applicator and the biodegradable net-like protective device. Examples of the aliphatic polyester include polyhydroxyalkanoates, which are thermoplastic resins produced by microorganisms, and thermoplastic resins, which are chemically synthesized. Homopolymers or copolymers of the following representative monomer components are listed. It is a polymer. However, it is needless to say that other components are included without being limited to the components listed here.

(Microbial production type) 3-hydroxypropinate, 3-hydroxybutyrate, 4-hydroxybutyrate, 3-hydroxyvalerate, 5-hydroxyvalerate, 3-hydroxycaprolate, 3-hydroxyheptano Ethate and 3-hydroxyoctanoate are mentioned, and as the polyhydroxyalkanoate copolymer, poly (hydroxybutyrate) and carbon number 3 to
Copolymers with 12 other hydroxyalkanoates are exemplified, and specific examples thereof include the following.

(3-hydroxybutyrate)-(3-hydroxypropinate) copolymer, (3-hydroxybutyrate)-(3-hydroxypropinate)-(4
-Hydroxybutyrate) copolymer, (3-hydroxybutyrate)-(3-hydroxyvalerate)-(3
-Hydroxyhexanoate)-(3-hydroxyheptanoate) copolymer, (3-hydroxybutyrate)-(3-hydroxyvalerate)-(3-hydroxyhexanoate)-(3-hydroxyheptanoate) -(3-hydroxyoctanoate) copolymer,
(3-hydroxybutyrate)-(3-hydroxyvalerate)-(3-hydroxyheptanoate)-(3-
(Hydroxyoctanoate) copolymer, (3-hydroxybutyrate)-(3-hydroxyvalerate)-
(3-hydroxyhexanoate)-(3-hydroxyheptanoate)-(3-hydroxyoctanoate)
-(3-hydroxy nanoate)-(3-hydroxydecanoate)-(3-hydroxyundeanoate)-
(3-Hydroxydecanoate)-(3-hydroxyundecanoate)-(3-hydroxyurearate) copolymer and (3-hydroxybutyrate)-(4-hydroxybutyrate) copolymer are preferred, but in particular It is not limited to these.

(Chemical synthesis type) ε-caprolactone,
Lactic acid, ethylene succinate, butylene adipate, butyrate succinate Examples of the modified aromatic polyester include poly (succinate / terephthalate) and poly (succinate / carbonate). Examples of the polysaccharide include, but are not particularly limited to, cellulose derivatives (cellulose acetate, cellulose caprolate), chitin, and chitosan.

The biodegradable applicator and the biodegradable net protector are manufactured by mixing or combining two or more of the above-mentioned aliphatic polyesters, modified aromatic polyesters, polysaccharides and polyvinyl alcohols. be able to.
Here, “mixing” means that a plurality of different biodegradable materials are mixed and used. Also, "composite"
This means that filaments obtained from a plurality of different biodegradable materials are combined to form a woven or knitted product using a weaving machine or the like, or that a sheet is laminated and molded. Further, the protective equipment may be used by arranging it so as to surround the applicator at least in the latter half of the production of seeds of aquatic products, but may be used so as to surround the applicator from the first half of the production of seeds. .

In the present invention, the target marine product is
It can be broadly classified into sea cucumber, shellfish and sea urchin. (Sea cucumber): Sea cucumber (Blue sea cucumber) Megai abalone, Tocobushi, Fukutokobushi, Sazae, Baigai (Sea urchins): Pafununi, Ezopafununi, Purple sea urchin, Kitamurasaki sea urchin, Akauuni T-die extrusion or calender molding, preferably a T-die extrusion molding method, into a sheet-shaped product, or a sheet-shaped biodegradable material laminated and compounded To the blow molding machine Corrugated by Rukoto, shaping the pack shape.

The shape is not limited to these shapes, and there is almost no difference in the number of the larvae attached to the molded product of the baby at the time of attachment of the marine product depending on the shape. However, by making the shape complicated, it is possible to increase the number of garments per unit area. However, structures that impede water flow must be avoided because they adversely affect the larvae of the aquatic products during attachment.

In the present invention, the net-like protective equipment is classified into a net bag and a net basket. Of these, the mesh bag is spun using a known technique such as melt spinning, solution spinning, or gel spinning using the material of the protective equipment. In terms of strength, it is preferable that a stretching step is interposed thereafter. The filaments thus obtained are woven and knitted by a weaving machine or the like and stitched to obtain a net bag. The mesh bag may be combined with filaments formed from a plurality of different biodegradable materials to form a composite, and a woven or knitted fabric may be created by a weaving machine or the like. Here, the plurality of different materials described above are biodegradable materials. However, filaments obtained from natural materials such as silk, cotton, and hemp are combined with a biodegradable material and woven. It may be knitted.

The mesh bag can be produced by a special extrusion method in addition to the above. That is, the orifice is provided over both the mandrel and the die, and can be formed by an extruder in which the inside and the outside rotate in opposite directions to each other. In other words, a portion where the inner and outer semicircular orifices coincide with each other with the rotation becomes a knot. This is stretched to obtain a net having high strength. After being cut into an arbitrary length, the end in one direction is sealed with a heat sealing machine or the like to obtain a net-like bag.

Examples of the mesh basket include a regular pearl net shape and a quadrangular pyramid shape, but are not limited to these shapes. The net basket can be made by the following method. 1) A method in which a mesh-like fabric is made in the same manner as in weaving, and then the fabric is sewn into a bag. 2) A method in which a net is formed by a loom for forming a fish net, then formed into a tubular shape, and then sewn into a bag shape in the same manner as in 1) above. 3) A method in which a mesh-shaped cylinder is formed using a molding machine similar to the one used for forming a draining net, and the bottom is heat-sealed or processed to form a bag.

The biodegradable material used in the present invention includes known materials (for example, JP-A-10-31567).
0, JP-A-10-222012, JP-A-11-2792
As described in 72), a lubricant or a filler may be used as needed without impairing desired physical properties.

Examples of the lubricant include uraric acid,
12-30 carbon atoms such as myristic acid, stearic acid, oleic acid, lead stearate, zinc stearate, calcium stearate, zinc stearate / barium stearate complex, zinc stearate / lead stearate / calcium stearate complex Examples thereof include fatty acid metal salts and complexes. The amount of the lubricant to be added is preferably 50 parts by weight or less, more preferably 15 parts by weight or less, based on 100 parts by weight of the biodegradable material. This means that 5
This is because the addition of 0 parts by weight or more may adversely affect the appearance and mechanical properties.

As the filler, either an inorganic filler or an organic filler may be used. As the inorganic filler, for example, magnesium, calcium, barium, boron aluminum, silicon, titanium, at least one metal oxide selected from metals such as zirconium, further,
Examples include hydroxides, carbonates, sulfates or silicates of these metals. Of these, calcium carbonate is preferably employed, and this calcium carbonate may be either heavy calcium carbonate or light calcium carbonate. The average particle size of the inorganic filler is 0.01 to 10 μm
Is preferable, and a surface improving agent such as a silane coupling agent or a titanate coupling agent may be used for the purpose of improving agglomeration and affinity between particles.

As the organic filler, for example, wheat,
Polysaccharides such as starch, cellulose, chitin, and chitosan obtained from potatoes such as corn and rice, potatoes such as potatoes and sweet potatoes are included. These organic fillers may be used as a mixture with an inorganic filler, but the average particles at this time,
The range of 0.01 to 10 μm is preferred. The filler is
It is preferably 50 parts by weight or less based on 100 parts by weight of the biodegradable material.

Next, a method of growing a marine product according to the present invention will be described with reference to FIGS. 1) First, pack-like molded articles 1 (or corrugated molded articles as shown in FIG. 1 (B)) as biodegradable applicators as shown in FIG. To form a connection. Next, these molded products 1 are shown in FIG.
As shown in Fig. 3, the pups in the floating stage of the aquatic products are dropped into the aquarium 2 where they are raised, and the larvae in the attachment stage of the aquatic products are allowed to attach naturally over about two weeks (Fig. 3 (A), (B)). Here, FIG. 3 (A) is an explanatory view showing the whole in the first half of seedling production and two weeks after the attachment of the seedlings in the method of growing aquatic products, and FIG. 3 (B) is a molded product in FIG. 3 (A). FIG. Reference numeral 3 in FIG. 2 indicates a floating infant, reference numeral 4 indicates an aeration apparatus, and reference numeral 5 in FIG. 3 indicates a molded product to which the infant is attached. The aeration device 4 is not only for supplying oxygen to seawater in the water tank 2 by a water flow, but also for providing uniformity of larvae in the water tank 2 and uniformity of feeding. In particular,
Since stagnation tends to occur in the gap between the molded articles 1, care is taken not to concentrate larvae in such places. The number of connected molded products may be appropriately selected depending on the depth and width of the water tank.

2) Next, as shown in FIGS. 4A and 4B, the molded article 1 is placed in a biodegradable mesh bag 6 and drooped into the sea. Here, FIG. 4B is an enlarged view of a main part of FIG. 4A. Here, since the molded article has biodegradability, it is biodegraded in seawater after a certain period of time. In addition, since the mesh bag 6 also has biodegradability, the life of the decomposition of the mesh bag 6 is set to be around the discharge size so that the mesh bag 6 can be naturally released at the same time as it collapses.

If a biodegradable material is also used for the filament, molded products and filaments made of different materials all have different life due to decomposition, and even if the same material is used, the thickness and yarn diameter of the molded product may be changed. Since the service life differs depending on the type, it is possible to easily set the collapse time of the molded product and the net bag. In addition, if the life of the molded product is set at the time when the seeds and seedlings detach themselves from the base (young age),
The young seedlings naturally leave the molded product, after which the molded product is decomposed and returned to the environment.

[0028]

EXAMPLES Examples of the present invention and comparative examples will be described below. However, the scope of the present invention is not limited by these. (Example 1) First, using polylactide acid as a material, a T-die extruder extruded a sheet at a temperature of 230 ° C, and was blown with a vacuum forming machine at a temperature of 100 ° C to obtain a thickness of 250 µm (thickness).
× 210mm (width) × 245mm (length) × 30mm
(Height) A pack-shaped molded product was obtained. Subsequently, the molded articles were connected with 10 strings to obtain an applicator to which the infant was attached. Here, the life of the applicator was designed to be decomposed after one year by selecting the type and thickness of the resin.

Next, it was used as a material for polybutylene succinate, melt-spun at a temperature of 200 ° C., and introduced into a stretching step. In this stretching step, a monofilament having a fineness of 400 d was obtained by stretching at a total stretching ratio of 5 times. Here, the life of the filament is designed to be broken after about 6 months by selecting the kind of resin and the fiber diameter. The filament was formed into a woven fabric using a fiber machine and sewn to obtain a net bag (protective device).

The pack-shaped applicator and the bag-shaped protective device were used as a base material for producing seeds and seedlings.

The above-mentioned 10 connected pack-shaped applicators are dropped into a production aquarium in which the larvae of the larva are raised.
The pups that moved to the attachment stage were allowed to attach spontaneously. After breeding for 2 months in this state, they were taken out of the aquarium, placed in the net bag prepared as described above for each pack-shaped applicator, and dropped in the sea. Around 6 months after the start of the wearing, the bag net collapsed and the pack-shaped applicator dropped. In addition, the life of the pack-shaped product is determined by considering the time when the attached larva comes off the applicator and becomes the youngest of the biological minimum type (the shape is the same as that of a living body), and decomposes after about one year as shown above. Designed to be.

Example 2 A sheet was extruded from a polybutylene succinate using a T-die extruder at a temperature of 230 ° C. and blown at a temperature of 100 ° C. using a vacuum forming machine.
A 50 μm (thickness) × 210 mm (width) × 245 mm (length) × 30 mm (height) pack material applicator was obtained. Subsequently, the applicators were connected with ten strings to obtain an applicator for attaching a baby. Here, the life of the applicator was designed to be decomposed after one year by selecting the type and thickness of the resin.

Next, it was used as a material for polybutylene succinate, melt-spun at a temperature of 200 ° C., and introduced into a stretching step. Stretch at a total draw ratio of 5 times and fineness is 40
0d monofilament was obtained. Here, the life of the filament is designed to be collapsed after about 6 months by selecting the resin type and the fiber diameter. The filament was formed into a woven fabric by a loom and sewn to obtain a bag net (protector).

The same test as in Example 1 was performed on the obtained pack-shaped applicator and bag net.

(Comparative Example) As a comparative example of Examples 1 and 2, the same test as in Example 1 was conducted by forming an adhering device in a pack shape with polystyrene.

The test was evaluated by examining the degradability of the base material used and the growth of the larvae from the attachment to the larvae to juveniles. Table 1 below shows the degradability of the used base material, and Table 2 below shows the growth degree of the floating larvae of the red mussel.

[0037]

[Table 1]

[0038]

[Table 2]

As a result of the test, when the growth period was 3 months, the growth degree was the same as that of the existing polystyrene, and the effect (adhesion and growth) as an applicator could be sufficiently satisfied. Normally, when the growing period of 3 months has elapsed, the grown infants are removed from the applicator and transferred to a net bag. After the passage, the growth length of the shell length was 20 mm, which was equivalent to that of polystyrene.

The degree of decomposition of the biodegradable applicator at that time can be taken out and discharged without causing mechanical damage to the infant in a state where the shape is destroyed and cannot be recovered. Was. In addition, since the product made of polystyrene was not decomposed at all, the infant was mechanically damaged when the infant was separated from the appressor.

[0041]

As described above in detail, according to the present invention, a biodegradable appressor used in the first half of production of aquatic products,
A biodegradable mesh protector disposed outside the biodegradable applicator so as to surround the applicator, wherein the biodegradable applicator is a molded product for attaching a baby product of a marine product. Yes, the biodegradable net-like protective device is configured to be a net bag or a net basket for underwater droop used at least during the latter half of seed production, without disposing of molded articles as waste, thereby reducing cost. An object of the present invention is to provide an apparatus for growing marine products.

The present invention also relates to a biodegradable applicator used in the first half of the production of seeds of aquatic products, and a biodegradable applicator used at least in the second half of the production of the seeds and arranged outside the applicator so as to surround the applicator. A method of growing aquatic products using a growing device equipped with a biodegradable net protector for underwater drooping, in the first half of seedling production, attaching a baby of the aquatic product to the biodegradable applicator. By the step of growing the pups, and in the latter half of the production of seedlings, by a configuration comprising a step of growing a marine product using the biodegradable net protector,
A method for growing a low-cost marine product can be provided without disposing the molded product as waste.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an applicator according to the present invention.

FIG. 2 is an explanatory diagram of the method for growing a marine product according to the present invention, in the first half of seedling production and when a baby is attached.

FIG. 3 is an explanatory diagram of the method for growing a marine product according to the present invention in the first half of seedling production and two weeks after the attachment of the infant.

FIG. 4 is an explanatory view of the method of growing aquatic products according to the present invention at the latter half of seedling production.

[Explanation of symbols]

 1, 5: biodegradable reticulated applicator (molded product), 2: water tank, 3: infant, 4: aeration device, 6: mesh bag (protective equipment).

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Fumio Nagata 3-7 Udetsu Shinko, Noto-cho, Noto-cho, Hoshi, Ishikawa Pref. 1-36-1, Chukoh Kasei Kogyo Co., Ltd. Awano Town, 990, depth 13 Chukoh Kasei Kogyo Co., Ltd. F term (reference) 2B104 AA22 AA38 BA01 BA06 CA01 DB01 DB04 DB24

Claims (4)

[Claims] 1. A biodegradable applicator used during the first half of the production of aquatic product seeds and seedlings, and a biodegradable net protector arranged outside the biodegradable applicator so as to surround the applicator. The biodegradable applicator is a molded product for attaching a baby product of aquatic products, and the biodegradable net protector is a net bag or net basket for underwater droop used at least during the latter half of seedling production. An apparatus for growing a marine product. 2. The biodegradable applicator and the biodegradable molded article are manufactured using any one of aliphatic polyester, modified aromatic polyester, polysaccharide, and polyvinyl alcohol. An apparatus for growing aquatic products according to the above. 3. The biodegradable applicator and the biodegradable molded product are produced by mixing or combining two or more of aliphatic polyester, modified aromatic polyester, polysaccharide and polyvinyl alcohol. The apparatus for growing aquatic products according to claim 1, wherein: 4. A biodegradable applicator to be used during the first half of production of seeds of aquatic products, and at least in the latter half of production of the seed and seedling, which is arranged outside the biodegradable applicator and surrounds the applicator. A method for growing aquatic products using a growing device equipped with a biodegradable net protector for dripping in water, and in the first half of seedling production, attaching a baby of the aquatic product to the biodegradable applicator, A method for growing a marine product, comprising: a step of growing a pup; and a step of growing a marine product using the biodegradable net-like protective device at the latter half of the production of the seedling.