JP2016127865A - Land efficiency cultivation method of tridacna crocea - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a land efficiency cultivation method which does not need a cultivation hole to be formed, freely opens a shell to receive sunlight, and prevents damage of a content in harvest.SOLUTION: In a water tank arranged on the land, Tridacna crocea is cultivated in an exposed state of a shell without a young shell placed in a cultivation hole, is harvested in an intact state after growth without damaging the shell or content thereof to be commercialized, thereby a planting hole is not required to be formed and a cultivation facility is simply and inexpensive. In harvest, digging the periphery of the grown shell with a chisel is not necessary and the content of the shell is not damaged and impaired. Especially, the Tridacna crocea does not live in a narrow cultivation hole, does not need to fear a foreign enemy to avoid accumulated stress, sufficiently takes in sunlight, and can efficiently utilize sun energy.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for efficiently cultivating and growing himejako in an onshore water tank.

As in Patent Document 1, it has been proposed to grow larvae by installing an onshore tank to which fresh seawater is supplied on a culture board in which larvae are planted in larvae planting holes. However, when this young shellfish grows and harvests, it is necessary to dig around the grown shellfish with a tool such as a chisel to bring it out of the hole, and the shell contents are damaged and die, resulting in market value. However, it will drop dramatically. In addition, as the ecology of tiger oysters, shells are opened and closed in narrow culture holes, making it difficult to efficiently open shells and receive sunlight effectively to grow.

JP-A-10-117628

Even when cultivating on land like this, it is necessary to dig around the grown shellfish with a chisel and take it out of the hole, so the contents of the shell will be damaged and die, and the market value will decline significantly There is a drawback of doing. There are six types of giant clam, Hijajako, Shiranami, Hirenashijako, Xagou and Togarichiranami. However, it is difficult to cultivate because it is inhabited by digging holes in the rocks with body fluids.
However, according to the discovery of the inventor, when cultivating on land, it is better to cultivate in a water tank without aquaculture holes from the beginning so that sunlight is efficiently received in a short period of time so as not to be restrained by aquaculture holes. We were able to grow and judged that it was advantageous.
The technical problem of the present invention pays attention to such a problem, it is not necessary to form a culture hole, the shell can be freely opened and sunlight can be received, and the harvest of the grown tiger oyster becomes extremely simple, and the contents are Achieving a land-based aquaculture method that will not be damaged.

The technical problem of the present invention is solved by the following means. Claim 1 is not a conventional method in which juveniles are placed in aquaculture holes in an aqua tank provided on land, but is cultured with the shells of Himejako exposed and intact after the growth without damaging the shells and contents. This is a method for cultivating Himejako on land, which is harvested and commercialized in a state.

Claim 2 is characterized in that it is cultivated without larvae being placed in the culturing holes and exposed without being damaged, and is taken out of the water tank and commercialized without damaging the shells and contents. Himejako to do.

As in claim 1, in the aquarium provided on land, cultivated without the larvae in the aquaculture holes with the shells of the tiger octopus exposed, and intact after the growth without damaging the shells and contents Since it is a land culture method for harvesting and commercializing it, there is no need to form a planting hole, so the structure of the culture facility is simple and inexpensive. Moreover, when harvesting, there is no need to dig around the grown shells with a chisel, and the contents of the shells are not damaged and damaged. In particular, Himejako does not live in a narrow aquaculture hole, so there is no need to be afraid of external enemies and stress does not accumulate, but the shells are kept fully open, taking in sunlight and taking in light energy. Effective use can promote growth.

Instead of the conventional method of putting juveniles in the culture holes as in claim 2, they are cultivated in a state where the shells of Himejako are exposed, and taken out from the aquarium in an intact state without damaging the shells and contents, and commercialized. Therefore, it is not necessary to form a juvenile shelling hole, and the structure of the aquaculture facility is simple and inexpensive. Moreover, when harvesting, there is no need to dig around the grown shellfish with a chisel or the like, and the contents of the shellfish are not damaged and damaged. Himejako, in particular, keeps its shells fully open without being constrained by aquaculture holes, and can grow by using sunlight efficiently, using light energy efficiently, and does not accumulate stress.

It is a perspective view of a water tank for cultivating Japanese octopus provided on land according to the present invention. It is a longitudinal cross-sectional view of the said water tank. It is a longitudinal cross-sectional view which shows another embodiment of the said water tank. This is a method for harvesting Japanese octopus. (1) is a conventional method and (2) is a method of the present invention.

Next, an embodiment explains how the land-based aquaculture method according to the present invention is actually realized. FIG. 1 shows an aquaculture tank provided on land, and rectangular tanks 1 and 2 are formed. The water tank 1 on the right side of the figure is formed in a container shape with concrete blocks 3 on land. Although the bottom is not visible, concrete blocks are laid down to form the bottom. In addition, a non-water-permeable coating is applied to the inner surface so that water does not permeate, so that seawater does not leak.

The water tank 2 on the left side is formed in a container shape with a veneer plate 4, and a water-impermeable paint is applied to the inner surface so that water does not permeate, so that seawater does not leak. The inner surfaces of the water tanks 1 and 2 may be covered with a water-impermeable film or sheet in place of the water-impermeable paint or together with the water-impermeable paint to ensure water leakage prevention. In addition, there is also strength such as FRP and the like, and a method in which the water tanks 1 and 2 are formed of a non-permeable synthetic resin and the swordfish is adsorbed and supported on the bottom or a non-permeable film or sheet.

In this way, after ensuring a watertight function so that seawater does not leak, as shown in FIG. 2, the bottoms of the tanks 1 and 2 are provided with sediments and other pebbles (including gravel and ballast) 5. Alternatively, sand is laid for about 3 to 15 cm, preferably about 5 to 10 cm, and seawater W is supplied so that the pebbles 5 and / or sand is submerged. The seawater W is provided with a pipe P so that fresh seawater is always pumped up and supplied from the sea. In addition, the tank water soiled by the cultivation of the himejako 6 ... is drained outside the tanks 1 and 2. The pebbles 5 and / or the sand layer becomes dirty and odors in the lower 2 cm, and even if sand is used, it may become dirty in one year.

Therefore, as shown in FIG. 3, a strong net 7 is laid on the bottom of the aquarium, and pebbles 5 and / or sand are laid on the bottom, and a funnel-like sewage collection 8 is formed on the lower side of the net 7 so that the sewage If it is made the structure which collect | recovers and always drains, the burden which cleans the inside of the water tanks 1 and 2 will be reduced.
The aquaculture facility having the above-described configuration is provided on land, and the larvae of himejaco 6 are cultivated so that they are supported by the pebbles 5 and / or sand. At this time, fresh seawater is always pumped up from the sea and supplied to the water tanks 1 and 2, and when contaminated with the himejako 6, it is settled under the net 7 and drained outside the water tank. As a matter of course, the animals that are the enemy of Himejako cannot be put in the tanks 1 and 2. Therefore, himejako can live with the shells fully open without being restrained by aquaculture holes, and can grow efficiently and smoothly by taking in enough sunlight and using light energy.

Himejako 6 adheres to and is supported by carcasses and other pebbles 5 and / or sand, but adsorbs to synthetic resins such as FRP as long as ash juice that Himejako 6 dislikes is not produced. Therefore, instead of laying the pebbles 5 and / or sand in layers of several centimeters, the bottom of the water tank can be directly adsorbed and supported by a synthetic resin member as long as it is not a material disliked by Himejako. Or you may make a water-impermeable water tank by apply | coating a water-impermeable paint to the inner surface of a water tank, or covering with a film or a sheet | seat. In addition, the structure where the side wall of the water tanks 1 and 2 is made low or a hole is made on the opposite side to the pipe P and the sewage in the water tank overflows is also possible.

Next, a method for harvesting grown Japanese octopus will be described. The submarine Himejako 9 has the habit of secreting fluid and digging a hole in the rock at the bottom of the sea to hide as shown in Fig. 4 (1). As a result of the inventor's experiment, this behavior seems to protect himself from foreign enemies.
Therefore, when harvesting the cultivated giant octopus 9, it is necessary to remove the shells 9 by scraping the surrounding rock 10 with a chisel i or the like, but at this time, the body is damaged and the market value is also reduced.
However, in the case of the present invention, the giant octopus 6 is not hidden in the hole and is only adsorbed to the pebbles 5 and / or sand, so that the adsorbed pebbles and / or sand can also be harvested and shipped together. If there is no pebbles and / or sand, etc., and they are adsorbed to the bottom or sheet of the water tank, they are peeled off using a spatula 11 as shown in (2) before shipping.
Therefore, according to the land culture method of the present invention, it is not only necessary to form a hole for inserting a juvenile shellfish, but also the harvesting is easy and the market value of himejako does not decrease.
In addition, the giant octopus is not constrained by aquaculture holes, can live with the shells fully open, can take in enough sunlight and use light energy, and grows efficiently.

Finally, I will explain the research results of Himejako's habits. The inventor of the present invention suddenly obtained a large number of larvae of Himejako due to special circumstances, so there was no time to drill holes, and it was unavoidable to collect pebbles and cultivate them on the bottom of the aquarium. In addition, the amount of pebbles is not sufficient, and there are examples of farming without pebbles.
In this way, we were not prepared at all, so we didn't expect anything, but Himejako grew steadily even if there were no holes for seedlings. I wondered there and researched it a lot, and concluded that it would be a hole to prevent foreign enemies to protect myself.
Only the inventor was able to correctly understand the purpose of digging a hole, and the evidence of the lack of preparation as described above was effective. It was regrettable that was indispensable. In addition, laying pebbles on the bottom of the aquarium so as to support the giant octopus in the state of imitating the sea floor is inadequate because there is a risk of predation by external enemies. Therefore, as a matter of course, it is assumed that seafood, which is a foreign enemy for Himejako, cannot be put together in Japanese aquariums.

By the way, pebbles and / or sand as in the present invention has a configuration in which pebbles and / or sand are laid and the clam shell is supported in a state imitating the seabed, and can be easily invented. It seems to be broken. However, laying pebbles and / or sand on the seabed will not prevent him, so he will not come close. Because of Himejako's habits, a rocky place where you can dig a hole for a hideout to prevent being attacked by external enemies is required.
Contrary to this behavior, the present invention has grown himejako in an aquarium with no rocks and only pebbles and / or sand. The secret is that, as mentioned above, even if the foreign enemy of Himejako can be prevented (even if it does not enter the aquarium), the hole is unnecessary, and there is no problem with pebbles and / or sand. Or you don't even need sand.
In this way, if you know that there are no foreign enemies, you don't need aquaculture holes, and you can keep the shells open all the time, so you won't be stressed by external enemies, and you will always receive sunlight and both himejako and symbiotic algae are efficient. It can grow in high quality and can cultivate high-quality chickpeas in a short time.

As described above, sediment and other pebbles and / or sand are laid on the bottom of a water tank provided on land, and seawater is supplied so that these pebbles and / or sand are submerged. The method of aquaculture on the ground to be supported and the water tank are made of synthetic resin and / or the inner surface is coated with synthetic resin paint and / or covered with a film or sheet to make it impermeable and supply seawater However, if the foreign enemy of Himejako is an aquaculture method that does not allow it to enter the aquarium, it will be extremely easy to harvest the grown Jachaco and will not cause quality degradation. In addition, it does not need to be afraid of foreign enemies, and stress does not accumulate, and it can grow efficiently by opening the shells and receiving full sunlight.

1, 2 Aquarium 3 Concrete block 4 Veneer board 5 Soil and other pebbles W Seawater P Pipe 6 Himejako 7 in the tank 7 Net 8 Collecting sewage 9 Himejako i in the hole
10 rocks
11 spatula

Claims (2)

Rather than the conventional method of putting juveniles in the aquaculture holes in the aquarium on land, they are cultivated with the shells of Himejako exposed and harvested without damaging the shells and contents after growing. A method for cultivating Himejako on land. Himejako, which is cultured with the juvenile shellfish exposed without placing the larvae in the aquaculture holes, and is taken out of the water tank and commercialized without damaging the shellfish and contents.

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