JP2009195150A - Culture apparatus for crabs, and method for culturing crabs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that there are a plurality of points at issue from the viewpoint of expenditures and water quality maintenance and culture techniques on the basis of mass-production of crabs have not yet been established though various methods are devised for reducing cannibalism in culture of aquatic animals practicing violent cannibalism such as the crabs. <P>SOLUTION: A solution is accomplished by illuminating the water surface or an underwater part of a preserve in which seeds and seedlings of the crabs etc., are charged with lighting equipment, suppressing an active feeding activity of the crabs, and utilizing the organisms gathering therearound as baits. When the housing density of the seeds and seedlings is high etc., one or a plurality of shelters are installed at need. If other live baits or mixed baits etc., are used in combination to produce residual baits, the resultant residual baits mostly go out from the base of the preserve to the outside and deterioration of water quality in the preserve by putrefaction is thereby reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an aquaculture device and a method of using the same. Specifically, the present invention relates to a novel apparatus for cultivating moss and a novel method for culturing moss using the apparatus. More specifically, the decrease in the number of survivors due to “cannibalism” that occurs when breeding or cultivating moths that live in seawater, brackish water, or freshwater, and increase in pods with leg defects The present invention relates to a cultivating apparatus for moss for preventing the occurrence and a method for culturing moss using the apparatus.

Most of the mosses are subdued during the day and submerged in the shade, while they are active in the night seeking food.

Mosses are animals that grow by molting and repeat molting several times to around 20 times (usually around 15 times) until they grow from juvenile crabs to parent crabs. The neoplasm immediately after molting cannot dive into the sandy bottom because the shell and legs are soft. When a mollusc individual immediately after molting encounters the same species of moss or an enemy, it is attacked and cannibalized or drowned. This is a major cause of the decrease in the number of survivors and survival yield during culturing of moss. For aquatic aquatic animals such as moss, feed a large amount of biological food to ease cannibalism, feed compounded food and frozen raw food at a high frequency of feeding, and feed more than satiety There are methods. However, the purchase cost is high to give a sufficient amount of biological feed, and the human cost is high to raise the frequency of feeding mixed feed and frozen raw food, so it is difficult to establish an economic act. In addition, feeding above satiety leads to deterioration of water quality due to rot in onshore tanks, and survival is reduced. Another method is to install many shelters to reduce the frequency of encounters between the sharks, but it is difficult to remove the remaining food when raising the aquarium, and the surrounding water also deteriorates. The water quality may be deteriorated due to water, and the survival may be greatly reduced. Therefore, aquaculture technology based on mass production of moss has not been established yet. JP 2006-254880, JP 2003-274793 and JP 2002-360110 can be seen as breeding methods for moss, but all breeding methods are inventions based on breeding by ponds and water tanks, and the expansion of facilities Is difficult. This is fundamentally different from the ginger-type breeding method as in this technology. Breeding methods using lighting fixtures have already been devised as a way of breeding fish, but the purpose of fish breeding is only for the purpose of effectively using natural biological food, and prevention of cannibalism taking advantage of the ecological characteristics of moss Because the purpose is unique to moss, the purpose itself is partially different. In addition, the present invention also shows a method of installing multiple lighting fixtures together with a shelter to more effectively prevent cannibalism, but a method of using multiple shelters and a method of installing multiple lighting fixtures in fish breeding Has not been considered.

JP 2006-254880 JP2003-274793 JP2002-360110 Cultivation and Fishery Series No.8 Biological Characters and Seedling Production Technology of Grouper Group Japan Cultivation and Fisheries Association Published in March 2002 p32-33

In view of such a situation, the present invention is a kite for effectively preventing a decrease in the number of surviving mosquitoes due to cannibalism or drowning during the culture period from juvenile crabs to parent crabs that can be shipped to the market. It is an object of the present invention to provide an aquaculture device and a method for effectively culturing moss using the device.

In order to achieve the above-mentioned problems, the present invention 1 is a lamp, a light bulb, a fluorescent lamp, an LED bulb, etc. installed in the sea surface raising ginger net containing seedlings such as moss or the like in or around the water up to 10 m above the water surface. This is an aquaculture device for moss illuminated by the electric lighting equipment.

In the present invention 2, the shelter is made of a net, cloth, artificial seaweed, natural seaweed, natural shiba, cocoon, etc. in the aquaculture device, and the shelter is arranged as much light as possible from the lighting device. It is a cultivating device for moss that is arranged in parallel with the light traveling direction.

In addition, the present invention 3 is a cultivating apparatus for mosquitoes distributed and arranged so as to illuminate the entire surface of the ginger as evenly as possible when a plurality of lighting devices are installed in the ginger or on the ginger in the aquaculture apparatus.

The present invention 4 is a method for cultivating moss using the aquaculture apparatus according to any one of the first to third aspects.

When the culturing apparatus for moss and the culturing method for moss using the apparatus of the present invention were carried out, cannibalism and moribund during the cultivation period could be greatly reduced.
For example, in the case of crab, breeding started in early summer and grew to food size in winter. If the aquaculture business is started by this invention, it can be supplied in large quantities to compensate for the catch in winter when the catch by the fishery is greatly reduced.

First, the lighting fixture used for the culture apparatus of this invention is demonstrated in detail. The lighting fixture used in the present invention may be any lighting fixture that can illuminate the water surface or water, such as a lamp, a light bulb, a fluorescent lamp, and an LED bulb. However, since it is used outdoors even when used on the surface of the water, it preferably has a certain level of waterproof function.

As for the position of installing the lighting equipment on the surface of the water, if there is only one lighting equipment, the illuminance will drop when leaving the water surface, so install it as close to the water surface as possible in the center of the ginger. This is a measure to keep as much prey as possible in the ginger. However, when there are a plurality of lighting fixtures, it may be installed away from the water surface in some cases so that the inside of the ginger can be illuminated as evenly as possible. This is a measure to widely disperse prey organisms and juvenile crabs in the ginger throughout the ginger.

When installing a lighting fixture in water, the position of the lighting fixture is arranged at the center of the ginger when there is only one lighting fixture. However, when there are a plurality of lighting fixtures, they are arranged so that the inside of the ginger can be illuminated as evenly as possible.

The shelter is made of a net, cloth, artificial seaweed, natural seaweed, natural shiba, cocoon, etc., and any material can be used as long as it reduces the encounter rate between the stored moss. It is desirable to arrange the shelter parallel to the traveling direction of the light so that the light from the luminaire is leaked out of the ginger as much as possible. This is a measure to collect organisms that gather in light from as wide a range as possible. In addition, the prey that gathers in the light, mainly in places close to the lighting fixtures, has a high density, and depending on the type and growth process of the moss, there is a habit of gathering in the light, so that the moss gathers in a location near the lighting fixtures There are many cases. For this reason, it is desirable to place the shelter in a place close to the lighting fixture. In addition, in the case of moss that initially live floating but shift to bottom life as it grows, it is desirable to change to the number and arrangement of shelters with emphasis on the bottom as they grow.

If multiple ginger nets are installed, it is better to separate them so that the light from other ginger nets does not reach. This is to prevent the competition of living organisms where the ginger nets gather in the light.

When feeding, it is desirable that the type of feed is a living fish or shellfish of a size that can be eaten by moths. When giving biological feed or mixed feed that has died due to circumstances, it is better to feed as many times as possible.

Hereinafter, the present invention will be further described with reference to the drawings. FIG. 1 and FIG. 2 show an arrangement example of the lighting apparatus 1, net ginger 2, artificial seaweed shelter 3, and water surface position 4 used in the present invention. Hereinafter, the present invention will be further described with test examples.

(Test Example 1)
<Test to examine the effect of installing lighting fixtures> Using artificial crab juvenile crabs produced in 2007 and seedlings, artificial seaweed shelter 3 with a length of 5 m each for two 240-diameter moji net ginger 2 The mixed feed was divided into 12 times every 2 hours regardless of day and night, and given enough to the amount of satiation. In the test area, a 60W seismic bulb was installed as a lighting fixture 1 20 cm above the surface of the water, and was raised for 25 days from August 13. During the rearing period, the number of survivors and growth of juvenile crabs in the test and control groups were observed several times. The test results are shown in Table 1.

Based on Table 1, consider the results of the test. The growth and survival rate of juvenile crabs in the test plot was better than that in the control plot. Moreover, when observed at night, small creatures that passed through ginger nets gathered near the water surface illuminated by the lighting fixtures, and the behavior of juvenile crabs preying on them was observed. From this, it was considered that the juvenile crabs in the test area gathered organisms that became food for the light by installing the lighting fixtures, and that they ate it and grew better than the control area. Because the test plots prey on live food, juvenile crabs gathered under the lighting fixtures and had many opportunities to contact other individuals. Since the survival rate of the larvae was lower than that of the test area, the activity of the juvenile crabs was slowed down by the light, and it was thought that there were few attacks on other crabs.

(Test Example 2)
<Study to examine the number of shelters installed> Using crab juvenile crabs produced in 2007, three 60-diameter scallops with a capacity of 0.4 tons and 60W seismic bulbs were installed 20cm above the water surface. Artificial seaweed shelters 6m, 13.5m, and 24m were introduced and bred for 24 days from September 24th. The number of juvenile crabs accommodated in each ginger was 500 less than in Test Example 1. During the rearing period, the number of survivors and growth of juvenile crabs in the test and control groups were observed several times. The test results are shown in Table 2.

Based on Table 2, consider the results of the test. From this test result, it was found that the survival rate was greatly improved by increasing the number of shelters. Moreover, since this test result which decreased the number of accommodations and increased the number of shelters compared with Test Example 1 has a higher survival rate than Test Example 1, the survival rate is inversely proportional to the number of accommodations, and the number of shelters It was thought that there was a proportional relationship. In the test area of Test Example 1, the mixed feed was used together, but the mixed feed was not fed in this test. However, in this test, since the survival rate was better than the result of the test section of Test Example 1, additional food such as mixed feed is not necessarily required, and the amount of biological food collected in light is insufficient. It was thought that it would be enough to use it together when judged.

The aquaculture apparatus and the aquaculture method according to the present invention can be applied to any kind of moss regardless of the kind of moss, for example, thistle, sawtooth crabs, tiger crab, janomega crabs, lobster crab, crabs, crabs, phlegm crabs , Crabs, snow crab, king crab, king crab, king crab, red crabs, red crabs, shrimp crabs, crayfish, tiger crab, hawk crab, coconut crabs, mock crabs, chug crab crabs, etc. In addition, like shrubs, cannibalism is intense and difficult to breed, lobster, tiger shrimp, shrimp, shrimp lobster, prickly shrimp, semi-shrimp, elephant shrimp, crayfish, crayfish, crayfish, tiger shrimp, bear shrimp, shrimp, shrimp, lobster It can also be applied to shrimp such as red shrimp.

It is a longitudinal cross-sectional view of the moss culture apparatus which shows one Example which concerns on this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a top view of the moss culture apparatus which shows one Example based on this invention.

Explanation of symbols

1 Lighting Measures 2 Net Ginger 3 Water Surface Position 4 Artificial Seaweed Shelter

Claims (4)

A cultivating apparatus for cultivating moss, which is provided with a lighting device for illuminating the surface of the ginger net for rearing seawater containing moss seedlings in or around the water. 2. The cultivating apparatus for mosquitoes according to claim 1, wherein a shelter is disposed in the cultivating apparatus for mosquitoes parallel to the traveling direction of light from the lighting equipment. 2. The apparatus for cultivating reptiles according to claim 1, wherein one or a plurality of the lighting fixtures are arranged in the ginger or on the ginger so that light is evenly distributed. A method for cultivating moss using the cultivating apparatus for cultivating moss.

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