JPH01317349A - Circulation-type breeding aquarium for iwamushi and sand worm and breeding of iwamushi using said aquarium - Google Patents

Abstract

PURPOSE:To breed IWAMUSHI (Marphysa sanguinea) without replenishing fresh sea water by placing a filter on the bottom of a box, covering the filter with a breeding layer composed of sand containing small pieces of a synthetic resin and circulating sea water while continuously cleaning the water with the layers. CONSTITUTION:IWAMUSHI is put into a breeding layer 4 and bred by supplying a feed to the upper water layer 5 by conventional method and circulating the sea water from the bottom filter 2 to the upper water layer 5 of the breeding layer 4 with a circulation apparatus 9 while allowing the water to absorb oxygen, thereby cleaning the sea water and depositing the feed to the upper surface of the breeding layer 4. The temperature of the sea water is maintained to 5-25 deg.C and the specific gravity is kept to 3.5-4.0 by supplying fresh water from a water-feeding apparatus 10. At the same time, bacteria for pisciculture is thrown into the upper water layer 5 to feed and remove the staining organic substances of sea water such as residual feed with the bacteria. The water- quality can be maintained and the IWAMUSHI can be bred without replenishing fresh sea water.

Description

[Detailed Description of the Invention] "Industrial Application Field" A circulating breeding aquarium suitable for cultivating sardines and lugworms used as fishing bait and longline feed, and using the circulating breeding aquarium,
This invention relates to a method for cultivating sardines, which is characterized by cultivating sardines without replenishing seawater.

``Prior Art'' Since ancient times, sardine worms and lugworms have been used as fishing bait and bait for fishing, but recently demand has increased and the shortage has been covered by imports from overseas. Demand is likely to increase in the future, and in order to meet this demand,
It has become necessary to try artificial aquaculture. Conventionally, artificial aquaculture methods using flowing water aquaculture tanks have been common. This is an aquarium in which a saran net is stretched inside a wooden box, a small hole is made in the bottom, and sand or gravel is placed inside, as shown in Figure 1, or the Japanese Patent Laid-Open Publication No. 58-22063
No. 2 and Japanese Patent Application Laid-open No. 60-210932, this was an aquaculture method in which synthetic fibers were used as a habitat layer, and seawater was allowed to flow into the aquarium.

``Problem to be solved by the invention'' The above-mentioned flowing-water aquaculture tank can provide a good environment for living things because fresh seawater always passes through the tank, but on the other hand, it requires a large investment in equipment. There were restrictions on where the facility could be installed, as it had to be done in a location where seawater could always be pumped up. This is the bottleneck that prevents mass production.

In addition, some people are considering aquaculture methods using aquariums that purify seawater and circulate it within the tank, but in that case, leftover food, feces, garbage, etc. accumulate, and the water quality deteriorates rapidly. Unable to prevent deterioration. Therefore, every few days,
The seawater had to be replaced and the tank had to be cleaned.

However, this process was time-consuming and labor-intensive, and in the end, cultivation could only be carried out in areas where seawater could be easily exchanged, making it virtually difficult to mass-produce using this method.

In order to solve the above-mentioned technical problems, the present invention has developed a new breeding tank that constantly purifies and circulates seawater, and uses this to manage water quality and grow sardines without having to replenish seawater. We have developed a method for cultivating snails that is characterized by the ability to grow them, making it possible to farm them at low cost regardless of the installation location.

"Means for Solving the Problems" In order to solve the above problems, the present invention employs the following means.

The first invention to be patented is that a bottom filter is placed at the bottom of the box, and on top of that, sand or gravel mixed with small pieces of synthetic resin is placed to create a habitat layer with a predetermined depth. , and then add seawater to such an extent that the habitat layer is submerged and a water layer is formed above it, and the seawater in the bottom filter is circulated to the water layer above the habitat layer while inhaling oxygen. This circulation-type rearing aquarium for rotary worms and lugworms is characterized in that it is equipped with a circulation device, a water supply device capable of supplying fresh water into the box body, and a water quality inspection and adjustment section for seawater as required.

The second invention to be patented uses the circulating aquarium described in the first invention, houses the caterpillars in the habitat layer, feeds them into the upper water layer by a conventional method, and uses the circulation device to The seawater in the bottom filter is circulated to the upper water layer of the habitat layer while breathing in oxygen to purify the seawater, and the food is deposited on the upper surface of the habitat layer. The temperature is maintained at 5°C to 25°C, and the specific gravity is maintained at 3.5 to 4.0 by supplying fresh water from a water supply device, and aquaculture bacteria are introduced into the upper water layer to remove organic substances that pollute seawater such as leftover feed. This is a method for cultivating sardine worms, which is characterized by removing seawater through feeding, maintaining water quality, and growing sardines without replenishing seawater.

"Example" First, as the first invention for which a patent is sought, a circulating breeding aquarium for rotifers and lugworms will be described.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a perspective view showing a circulation type aquarium according to the present invention, and FIG. 2 is a longitudinal sectional side view of the same aquarium.

In the figure, reference numeral 1 denotes a box made of wood or synthetic resin that forms the outside of the aquarium, and a bottom filter 2 is placed at the bottom of the box 1. The bottom filter 2 only needs to have a convex portion that forms a space inside for clean and dead water to enter when placed on the bottom, and its specific shape is not specified.

In addition, sand or gravel mixed with small pieces 3 made of synthetic resin such as vinyl is placed in the box 1 to form a habitat layer 4 having a predetermined depth. The sand may be coral sand, shellfish sand, or medium sand as long as it has good water permeability.

Further, seawater is kept in the box l to such an extent that the habitat layer 4 is submerged and a water layer 5 is formed above it.

In addition, inside the bottom filter 2 and the upper water layer 5 of the habitat layer 4,
It consists of a circulation passage pipe 6 which has an opening at both sides and connects the two, and an oxygen supply device 8 which is located inside the circulation passage pipe 6 and has an oxygen release part 7 inside the bottom filter 2. A circulation device 9 that circulates water to the upper water layer 5 of the habitat layer 4 is provided at a suitable location within the box 1. In other words, as the air and oxygen bubbles released into the seawater rise, the water also rises, creating a circulating water flow.

Inside the box 1, there is further provided a water supply device io capable of supplying fresh water. .

Incidentally, FIG. 3 shows another embodiment of a systemized circulation type rearing tank, and since the corresponding components are given the same numbers, detailed explanations will be omitted here. This embodiment is a circulation-type breeding tank in which a common circulation device 9a capable of simultaneously circulating seawater from a plurality of breeding tanks 1 is provided, and a seawater quality inspection and adjustment section 1 is provided in the middle of the circulation path. The water quality inspection and adjustment section 11 is equipped with an oxygen supply device 8 and a water supply device 10, and also adjusts the specific gravity and temperature of seawater.

The invention of claim 2 is a method for cultivating sardines using the water circulation type sardine worm breeding aquarium according to claim 1, in which sardines are raised without replenishing seawater.

Cord larvae are accommodated in the habitat layer 4 in the water-circulation type rotary worm rearing aquarium according to the first claim.

A circulation device 9 circulates the seawater in the bottom filter 2 to the upper water layer 5 of the habitat layer 4 while breathing in oxygen, so that the seawater is constantly purified.

In such an environment, bait is cast into the upper water layer using a conventional method.

Here, the conventional method refers to feeding seaweed, animal meat, dextrix, etc. in accordance with the customs learned from past experience. For example, since they begin to feed after the nectochita stage, it is desirable to feed seaweed once a week, and fish and shellfish meat daily.

Then, when the seawater in the bottom filter 2 is circulated by the circulation device 9, the seawater flows through the sand of the habitat layer 4, so that the feed is deposited on the upper surface of the habitat layer and reared. Therefore, food is always readily available for the caterpillars living in the habitat layer 4.

Moreover, at this time, the temperature of the seawater is maintained at 5° C. to 25° C., and the specific gravity is maintained at 3.5 to 4.0 by supplying fresh water from a water supply device. It seems best to keep the water temperature almost the same as in their natural habitat, and make the specific gravity a little heavier than natural.

Next, bacteria for aquaculture (photosynthetic bacteria, etc.) are introduced into the upper water layer 5 to remove organic substances that pollute the seawater, such as leftover feed and feces, thereby preventing the seawater from becoming dirty or rotten. This prevents the seawater from becoming contaminated and preserves the quality of the seawater for many years. In other words, if we adopt a seawater quality maintenance method that uses seawater sand filtration, circulation purification through oxygen supplementation, and the removal of organic pollutants through the proliferation of bacteria, it can be repeatedly regenerated in the same way as the natural seawater purification system in nature. It can now be produced and used. As a result, by simply supplying seawater initially,
After that, it became possible to raise the caterpillars for many years without having to replenish seawater.

"Effects" The circulating aquarium of claim 1 creates a constant flow of water in the habitat layer, which also acts as a filtration function to purify seawater, and oxygen is constantly supplied. Even in a circulating aquarium, the seawater is less contaminated, making it possible for caribou and lugworms to grow.

The second claim is that the circulating aquarium is used to purify seawater, inhale oxygen, adjust the temperature and specific gravity, and add bacteria and remove organic pollutants such as leftover feed and feces through their reproduction, thereby improving the quality of the water. In order to maintain the water content, the worms can be grown for many years by simply supplying seawater for the first time without having to replenish the seawater. This has made it possible to farm snails anywhere, even in inland areas where seawater supply is difficult.

For this reason, it has become possible to disperse and cultivate the caterpillars in various locations and produce large quantities of them.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a circulation type aquarium according to the present invention, Fig. 2 is a longitudinal side view of the same aquarium, and Fig. 3 is an explanation showing another embodiment in which the circulation type aquarium is systemized. Figure, 4th
The figure is a perspective view showing a conventional flowing water culture tank. "Explanation of main symbols" l...Box 2...Filter 3...Small piece 4...Living layer 5...Upper water layer 6...Circulation passage pipe 7...Oxygen release section 8...Oxygen supply device 9...Circulation device 1o...Water supply device 11...Water quality inspection and adjustment department Patent applicant Zen Aizawa 1 Figure 2 Figure 3 a

Claims (2)

[Claims] (1) Place a bottom filter at the bottom of the box,
On top of that, sand or gravel mixed with small pieces of synthetic resin is placed to form a habitat layer with a predetermined depth. It was placed,
A circulation device is provided that circulates the seawater in the bottom filter to the upper water layer of the habitat layer while inhaling oxygen,
A circulation-type rearing aquarium for rotifers and lugworms, characterized in that a water supply device capable of supplying fresh water and a seawater quality inspection and adjustment section are provided as necessary in the box body. (2) Using the circulating breeding aquarium according to the first claim, house the caterpillars in the habitat layer, feed them into the upper water layer by a conventional method, and inhale oxygen from the seawater in the bottom filter using the circulation device. At the same time, the water is circulated to the upper water layer of the habitat layer to purify the seawater, and the food is deposited on the upper surface of the habitat layer. Water quality is maintained by supplying fresh water from the device to maintain the temperature between 3.5 and 4.0, and by injecting bacteria for aquaculture into the upper water layer to remove residual feed and other seawater contaminating organic substances by feeding them. A method for cultivating sardines, which is characterized in that the sardines are grown without the need for new supply of seawater.