JPS5930379B2 - Shellfish breeding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-stage rearing device suitable for rearing shellfish such as shellfish and clams, and lugworms used as fishing bait.

Generally, when raising shellfish artificially, a method is adopted in which they are raised in an artificial rearing tank on land from hatching until they grow to a certain size, and then released into the sea. A rearing device equipped with this is placed in a tank with flowing seawater, and young shellfish are released into the device, where they are grown until they reach a size of about 5%.

When the young shellfish grow and the amount of diatoms they feed becomes large (and it becomes difficult to manage their supply), they are transferred to an intermediate breeding tank where artificial feed can be used, and in this intermediate breeding tank, the size of the diatoms released into the natural sea (approximately They are raised until they grow to 30-35%.

However, the above-mentioned conventional intermediate rearing tank requires a large installation space and has a large flow of seawater, making it inefficient at feeding artificial feed and uneconomical. Furthermore, there has been a strong demand for a rational rearing system that can raise fish to a stock size (approximately 30 to 35%) using artificial feed or in combination with artificial feed.

Such a request can be achieved by arranging multiple compact breeding tanks vertically in the form of shelves, installing water supply pipes with watering holes arranged above each stage of the breeding tanks, and supplying water to the topmost water supply pipe. The groove can be cleared to some extent by using a conventional multi-stage rearing device that guides the overflow water to the lower water supply pipe. Due to its scarcity, it cannot be applied to shellfish, especially young shellfish, which have low resistance to sewage.

The present invention has a small installation area and is easy to manage, prevents dirt in the breeding tank by effectively flowing a small amount of breeding water, and is compact and capable of breeding large quantities of shellfish using artificial feed. It provides breeding equipment.

The drawings showing the embodiments of the present invention will be explained below.
FIG. 1 is a perspective view showing the entire rearing device, in which a plurality of rearing tanks 2, 2 are installed in a frame-like frame 1 at intervals vertically and in a plurality of shelves in the horizontal direction. Breeding tank 2A on each stage.

Water supply pipes 4A, 4B, and 4C each having a large number of watering holes 3, 3 arranged in a row are arranged above 2B and 2C, and the uppermost water supply pipe 4A communicates with a seawater supply source (not shown). It is connected to the main water supply pipe 5, and seawater for rearing (hereinafter referred to as rearing water) is supplied from this uppermost water supply pipe 4A.

In addition, a drainage lower is provided at the bottom of each breeding tank, and a water level adjustment tank 6A, which is much smaller in capacity than the breeding tank 2, is provided on one side of each stage of the breeding tank.

5B and 5C are provided, and as shown in FIGS. 2 and 3, a water pipe 8A connects the drainage ports 1 of the rearing tanks 2A, 2B, and 2C of each stage to the water level adjustment tanks 6A, 6B, and 6C.

8B and 8C communicate with each other, and the upper water level adjustment tank 6
A, 6B and the lower breeding tanks 2B, 2C water supply pipe 4B,
4C so that the rearing water returned to the upper water level adjustment tanks 6A, 6B can be supplied in a shower form from the lower water supply pipes 4B, 4C across the width of the rearing tanks 2B, 2C. Eggplant.

The water level adjustment tanks 6A, 6B, and 6C are breeding tanks 2A at each stage.

This is to maintain the water levels of 2B and 2C at a predetermined height, and the water level adjustment tanks 6B and 6A located above the lowest level water level adjustment tank 6C are placed to the east, for example, as shown in Fig. 4. , the lower end communicates with the water supply pipes 4, 4 to each of the lower breeding tanks 2.2, the upper end is closed, a slit 10 extending vertically is provided in the upper part, and an upper edge 11 is inclined on the outer periphery of the upper part. A standpipe 13 into which a short pipe 12 is rotatably fitted is provided, and the water level of the breeding water flowing into the water level adjustment tank 6 from the water pipe 8 is adjusted by the short pipe 12 and the vertical direction of the slit 10 is adjusted. When the opening position is exceeded, the excess amount is supplied to the water supply pipe 4 through the slit 10 of the standpipe 13.

In the figure, 14 is a drain pipe.

In each of the breeding tanks 2, 2 described above, as shown in FIG. 10～
A corrugated plate 19 with many holes 18 of about 15 cm in diameter is laid down, and when raising other creatures such as gosai, a container made of micro mesh net or water-permeable fabric is placed inside. Use by laying earth and sand on the bottom.

Each of these rearing tanks 2 preferably has a bottom surface inclined toward the drainage lower, and a lattice-shaped draining table 20 is provided on the bottom surface.
is placed, and a basket-like net 17 is placed on top of the upper frame 21.
is placed on the upper edge of the breeding tank 2, and the net 17 can be taken out when desired.

In addition, in the example, a mode is shown in which the breeding tanks are arranged in three stages in the vertical direction and four stages each in the horizontal direction.
The number of stages of breeding tanks and the number of tanks installed in each stage are not particularly limited.

In addition, the size of one breeding tank is 80 to 100 cm in width, 50 to 70 crrL in depth, and 15 to 2 cm in depth.
The size is preferably on the order of 5, and the material is preferably wood.

Furthermore, the water level adjustment means in the water level adjustment tank described above is not limited to the embodiment shown in FIG.
If the water level in the rearing tank is determined in advance to approximately the desired value, for example, the upper water level adjusting tank 6A connects the rearing tank 2 and the water level adjusting tank 6 to the U through the water pipe 8, as shown in FIG. They may be connected in a shape such that excess water from above is supplied to the standpipe 22 or the water supply pipe 4 below it.
Similarly, in the lowermost water level adjustment tank 6C, it is preferable to drain water to the outside through a drainage standpipe 22 whose upper end opening faces the upper space area of the water level adjustment tank 6C, as shown in FIG. .

In addition, 23.23 in Figure 1 is the water supply amount adjustment valve, 24.2
4 is pulp for drain discharge.

As described above, the apparatus for breeding shellfish, etc. according to the present invention (i.

A plurality of rearing tanks 2, 2 each equipped with a drainage lower at the bottom are arranged vertically in a plurality of stages at appropriate intervals, and are arranged horizontally adjacent to each other in a shelf-like manner. Each tier of breeding tanks 2A and 2B.

Water supply pipes 4A, 4 with many watering holes 3 arranged above 2C
B, 4C are extended, and the uppermost water supply pipe 4A is connected to a water supply source (not shown) to supply water to the uppermost breeding tank 2A, and the lowermost breeding tanks 2B, In a device configured to supply water to 2C, each stage of breeding tank 2A,
Water level adjustment tanks 6A, 6B, 6 on the sides of 2B and 2C, respectively.
A drainage port I provided at the bottom of each rearing tank 2A, 2B, 2C and a water pipe 8 connecting each water level adjustment tank 6A, 6B, 6C.
A, 8B, 8C communicate, upper water level adjustment tank 6A
, 6B inside or on the side of the water level adjustment tank 6A, 6B.
A standpipe 13.22 with an opening facing the upper space area of the standpipe 13.22 and its lower rearing tanks 2B, 2C are arranged.
water supply pipes 4B and 4C to the water level adjustment tank 6A,
The rearing water in the upper layer (water surface area) of 6B is transferred to the lower water supply pipe 4B.

The water supply valve 23.2 can be introduced into the water supply valve 23.2, and is configured so that the rearing water that has flowed into the lowest water level adjustment tank 6C is discharged from the upper layer to the outside.
3 is opened and breeding water is supplied from the uppermost water supply pipe 4A to each of the uppermost breeding tanks 2A, the water level to the uppermost breeding tank 2A and the water level adjustment tank 6 gradually rises to a predetermined water level, that is, the above water level. When the water level rises to the opening position of the slit 10 of the standpipe 13, the increased water from then on flows into the slit 10 of the above-mentioned standpipe 13 from the water surface portion of the upper layer, so that even if water supply from the water supply pipe 4A is continued. The water level in the rearing tank 2A is maintained constant, and the increased water thereafter is supplied in the form of a shower over the width direction of the lower rear rearing tank through the water supply pipe 4B from the standpipe 13.

When the breeding tank 2B reaches a predetermined water level, the increased water is similarly supplied to the next breeding tank via the lower water supply pipe, thus completing the water supply to all breeding tanks, and It is possible to maintain the water level in all breeding tanks as specified while continuing to supply water to the tanks.

Therefore, the rearing water can be used economically and effectively, and since the water flow in the rearing tank is vertical, it is possible to administer artificial feed, and the rearing water in each rearing tank is passed from the bottom through a water pipe to a water level adjustment tank. In the water level adjustment tank, the breeding water in the upper layer is sequentially led to the lower breeding tank through the standpipe and the water supply pipe, so the settled waste generated in each breeding tank is collected in each water level adjustment tank. It flows and stays in the water level adjustment tank, preventing outflow to the lower breeding tanks, and each breeding tank can be kept clean at all times, making it particularly suitable for breeding shellfish that have grown to a certain extent.

Furthermore, since multiple breeding tanks are installed in multiple stages in the form of shelves, it is extremely advantageous in terms of space, and it is also possible to manage compartments according to the growth status of the animals, making it easy to monitor the growth status. It has many practical advantages such as ease of use.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the entire device, Fig. 2 is a simplified front view, Fig. 3 is a partial perspective view of the main part, and Fig. 4 is a perspective view of the upper part. FIG. 5 is an enlarged perspective view of the water level adjustment tank, FIG. 5 is a partial side view of the rearing tank, and FIGS. 6 and 7 are simplified sectional views showing other embodiments of the water level adjustment tank.

Claims (1)

[Claims] 1. A plurality of breeding tanks equipped with drainage holes at the bottom are arranged in multiple tiers vertically at appropriate intervals, and are arranged horizontally adjacent to each other in a shelf-like manner, and each tier is A water supply pipe with a large number of watering holes arranged in a row is installed above the breeding tank, and the uppermost water supply pipe is connected to a water supply source to supply water to the top breeding tank. In a device configured to supply water to breeding tanks, a water level adjustment tank is provided on the side of each stage of the breeding tank, and a drain provided at the bottom of each breeding tank is connected to the water level adjustment tank through a water pipe. A standpipe with an opening facing the upper space area of the water level adjustment tank is provided inside or on the side of the upper water level adjustment tank, and the standpipe is connected to the water supply pipe to the rearing tank below it. The rearing water in the upper layer of the water level adjustment tank can be introduced into the lower water supply pipe, and the opening of the drainage standpipe is exposed to the upper space area of the lowermost water level adjustment tank, so that the water can be introduced into the lower water level adjustment tank. A shellfish breeding device M in which the inflowing breeding water is drained to the outside from the upper layer.