JPS58224629A - Breeding of ear shell - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to a method for cultivating planer with improved multiplication rate.

In conventional planer aquaculture, young shellfish are flashed in an aquarium and grown by growing on a synthetic resin board containing a large number of them. Peel it off, move it to another aquarium, and let it grow on the board again. In this way, the process of detachment and re-attachment is repeated several times, and when the young shellfish reach a few centimeters in size, they are detached again and thrown into the sea, where they grow on reefs on the ocean floor.

In these conventional methods, young shellfish are detached by using chemicals to paralyze the shellfish or by soaking them in warm water to weaken the shellfish's adsorption power. There was a problem that the resulting young shellfish were no longer in a normal state, had a high mortality rate, and had a poor growth rate.

In addition, in conventional aquaculture, young shellfish were released into sea areas where block-shaped fish reefs were introduced or into natural rocky areas, so the shellfish were dispersed over a wide area after being released, and the recovery rate was not very favorable. There was a problem.

The present invention has been developed in consideration of the above-mentioned problems, and its first purpose is to enable the shellfish that have settled on the shellfish to be released as they are without going through the process of peeling, which has a negative impact on the young shellfish. In particular, another objective is to improve the recovery rate of released shellfish.

The characteristic feature of the present invention for achieving this purpose is that a concrete block for the growth of young shellfish is housed in an aquarium, and the young shellfish are nailed to the concrete block in the aquarium. Let them settle on the block, feed them in this state for a certain period of time to mature, and then remove the concrete block from the concrete block.
In the method for cultivating planer, which is characterized by submerging young shellfish in the sea with them still attached and growing them under natural conditions, and in the above method, when sinking concrete blocks into the sea, the concrete blocks are placed in multi-tiered wells placed on the seabed. The purpose is to put them into a concrete reef shaped like a pile.

Next, an example of implementation of the present invention will be described with reference to the drawings.

First, arrange concrete blocks 2 for young shellfish settlement in a water tank 1 for artificial intoxication.
As the block 2, for example, one having a plurality of rope passage holes 3, 3, . . . in the longitudinal direction is used. A plane is artificially grown in a water tank 1 containing a large number of concrete blocks 2.

The young sushi shellfish at the eaves float in the water and grow on the concrete block 2. In this case, the plane prefers dark areas, so
A lot of it gets into the through hole 3 of the concrete block 2 and grows there.

Feed it in the aquarium 1 with the seedlings grown in this way,
Grow until the size is about 1 cm. Thereafter, the concrete block 2 with the young shellfish attached to it is taken out from the aquarium 1, and dropped into a sea area suitable for the growth and subsequent collection of the oysters, allowed to grow under natural conditions, and then carried out using the same method as before. Collect the grown plane.

In the above-mentioned embodiment, the concrete block 2 on which the young shellfish have grown is simply sunk into the seabed, but in addition to this, the present invention is to place the concrete block 2 into a fish reef 4 having a certain shape. This fish reef 4 is made of thick plate-shaped or column-shaped concrete material 5.
．． 5... are stacked alternately in a multi-tier parallel grid shape and connected and fixed to each other, and the concrete blocks 2 on which young shellfish have grown are housed within the parallel grid shape.

In this case, each fish reef 4 is installed on a sandy seabed, seaweed such as kelp is allowed to grow naturally on the concrete material 5.5, and then a concrete block 2 with young shellfish attached thereto is placed. If accommodated, the shellfish will grow without leaving each point 14, and by pulling up the fish reef 4, 100% of the grown shells can be recovered.

Furthermore, since ocean currents pass horizontally through the fish reef 4, which is assembled in a multi-tiered column shape, seaweed, which is food for the planer, is easily entangled, and the natural feeding effect is also good.

Furthermore, after the young shellfish are released together with the concrete blocks 2, they may be artificially fed into the fish reef 4.

The planer culture method of the present invention is constructed as described above, in which a concrete block to be sunk to the seabed is placed in a wild aquarium, and young molluscs are grown to a certain size by settling on the concrete blocks. By releasing the young shellfish into the sea without peeling them from the concrete blocks on which they have grown, it has become possible to culture them efficiently without causing any negative effects on the growth of the young shellfish. be.

In addition, by assembling the concrete blocks in the shape of a well and placing them in the sea area, the concrete blocks on which the young shellfish have grown are housed, resulting in a good natural feeding effect and the ability to easily eliminate artificial feeding. Dispersion of the particles was prevented, and the recovery rate was significantly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a perspective view of a concrete block for attaching young shellfish, Fig. 2 is a cross-sectional view of the concrete block housed in a water tank, and Fig. FIG. 4 is a side view of the concrete block according to the embodiment in a submerged state in the sea, FIG. 4 is a perspective view of a fish reef according to the second embodiment, and FIG. 1...Aquarium for eaves, 2...Concrete blocks, 4...Fish reef. 7- Figure 2 [3 Figure 2 / Figure 4

Claims (1)

[Claims] (1) A concrete block for the settlement of young shellfish is placed in an aquarium, and the young shellfish are flashed in the tank and settled on the concrete block, and in this state they are fed for a certain period of time to grow. , then the concrete block,
A method of cultivating snails that is characterized by submerging the young shellfish in the sea with them still attached, and allowing them to grow under natural conditions. ■ Concrete blocks for the growth of young shellfish are placed in the aquarium, and the young shellfish are allowed to settle on the concrete blocks and fed for a certain period of time to grow them. A method for cultivating snails, which is characterized in that the concrete blocks are then placed on the seabed with the young shellfish attached to them in a concrete reef stacked in multiple tiers in the shape of a well, and allowed to grow.