JPH1042740A - Cultivating device for aquatic organism for feed and tool therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of efficiently cultivating larvae of a brine shrimp until becoming an adult thereof. SOLUTION: This cultivating device of an aquatic organism for a feed, is obtained by housing a salt water for cultivating larvae of a brine shrimp in a water vessel 11, installing a cylindrical cultivating tool 12 vertically in the water vessel 11, arranging a stone 14 mounted at a tip of a ventilating tube 13 in a bottom part of the cultivating tool 12, and diffusing air supplied by the ventilating tube 13 from the stone 14 to supply oxygen to the salt water. At a peripheral surface of the lower part of the cultivating tool 12, a pair of intake ports 12b is installed as opposing for flowing the salt water flown by bubbles of oxygen diffused from the stone 14 to inside thereof and at the top end part of the cultivating tool 12, and a discharging port 12a is installed for discharging the cultivating water in the cultivating tool 12 along the water surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cultivating organisms used as feed for fish, shrimp, crabs and the like.
In addition, the present invention relates to a training tool used for the training device, and more particularly to a training device and a training device for marine feed organisms capable of efficiently training larvae of brine shrimp to adults.

[0002]

2. Description of the Related Art The demand for brine shrimp (artemia), which inhabits salt water lakes, has been increasing worldwide since it was found to be useful as feed for fish, shrimp, and crab. . At present, eggs of brine shrimp (about 0.20 to 0.24 mm in diameter) are marketed as cans, and larvae (noprius) of about 0.4 mm in length hatched from the eggs are used as feed for fish and the like. I have.

Recently, it has been found that adult brine shrimp (about 1 cm in length) that has been trained is effective as a feed for fish such as flounder and yellowtail.
It has been attempted to train hatched larvae to adulthood.

[0004]

The larvae of the brine shrimp are usually cultivated by feeding them with suitable nutrients in a training water in a water tank. However, since the larvae of brine shrimp are very small and delicate, it is not easy to train them to adulthood. For example, in order to train brine shrimp larvae to adults, sufficient oxygen must be supplied, but if the supply of oxygen disturbs the training water in the aquarium, the larvae will not be able to survive There is a risk. The probability that a brine shrimp larva can be grown to an adult of about 1 cm in length is usually 50% or less.
Moreover, it is not easy to train a large amount of brine shrimp larvae.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a training apparatus and a training apparatus capable of efficiently training aquatic feed organisms such as brine shrimp larvae to adults. To provide a training tool.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for cultivating marine feed organisms, comprising: a water tank containing training water for cultivating marine feed organisms; and releasing air or oxygen to the training water in the water tank. A gas dispersing device having a cylindrical shape which is vertically disposed in a water tank with the gas dispersing device disposed in a bottom portion, and an inflow port through which training water flows into the lower peripheral surface. And a training tool provided at the upper end with an outlet for discharging the internal training water along the water surface.

[0007] The inflow port of the training device is located above a gas diffusion device disposed in the bottom of the training device.

[0008] The upper end surface of the training implement is at the same level or higher as the water level of the training water, and the outlet is cut out from the upper end face of the training implement over an appropriate vertical length and circumferential length. It is formed by drilling.

The marine feed organism is a brine shrimp larva.

The cultivation tool for marine feed organisms of the present invention is a cultivation tool used in a water tank containing training water for cultivating marine feed organisms, and is installed vertically in the water tank. The bottom has a tubular shape in which a gas diffuser for dispersing air or oxygen is disposed, and a lower peripheral surface thereof is provided with an inflow port through which training water flows therein,
An outlet for discharging the internal training water along the water surface is provided at the upper end.

[0011] The marine feed organism is a brine shrimp larva.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of an apparatus for cultivating marine feed organisms according to the present invention, and FIG. 2 is a sectional view thereof. The training device 10 is for training larvae (noprius) hatched from eggs of brine shrimp (Artemia), for example. Aquarium 1
1 has a depth of about 35 cm, and stores salt water such as seawater as training water. In addition, the training tool 12 includes the water tank 11.
Is about 80% of the depth of
cm.

In the bottom of the training tool 12, a stone 14 is disposed as a gas dispersing tool. This stone 14
Is formed in a spherical shape by a porous material, is attached to the distal end of the ventilation tube 13 for supplying air,
It is submerged at the bottom of the training tool 12. The stone 14 is supplied with air through the ventilation tube 13,
The air supplied by the ventilation tube 13 becomes bubbles from the peripheral surface of the stone 14 and is radiated into the salt water.

The training tool 12 is made of plastic or the like.
It is formed in a cylindrical shape, and each end face thereof is open. At one position in the circumferential direction at the upper end of the training tool 12, an outlet 12a cut out in a rectangular shape from the upper end surface is formed. The outlet 12a has a vertical length of about 1 to 3 cm and a circumferential length of about 3 to 5 cm.

A pair of inflow ports 12b are provided in the lower peripheral surface of the training tool 12 in an open state. Each inlet 12b
Are arranged in the bottom of the training tool 12 while being spaced from each other by 1/4 turn in the circumferential direction with respect to the outlets 12a provided at the upper end so as to face each other. It is located about 1 cm above the stone 14 that has been set. Each inflow port 12b has a vertical length of about 1 to 3 cm and a circumferential length of about 3 to 6 cm.

In the training apparatus 10 having such a configuration, salt water as training water is supplied into the water tank 11 to a level equal to the level of the upper end surface of the training tool 12. Then, larvae (noprius) hatched from the eggs of the brine shrimp are put into the salt water around the training implement 12 in the water tank 11. In this state, air is supplied from the ventilation tube 13, and air is supplied from the peripheral surface of the stone 14.
While being diffused as bubbles in the salt water in the training tool 12,
Chlorella is fed to the salt water to train larvae of brine shrimp.

The air supplied from the ventilation tube 13 is
When the bubbles are radiated from the peripheral surface of the stone 14 into the salt water in the cylindrical training tool 12 as bubbles, the bubbles float the salt water in the training tool 12. At this time, the salt water flows upward along with the bubbles floating in the training tool 12. And training tool 1
Air bubbles and salt water flowing upward within 2
Is discharged in the horizontal direction from an outlet 12a provided at the upper end portion of the. At this time, since the upper end face of the outflow port 12a is at substantially the same level as the water surface of the salt water, the bubbles and the salt water flow out horizontally along the water surface. Therefore, there is no possibility that the surface of the salt water in the water tank 11 will be disturbed by the bubbles and the salt water flowing out of the training tool 12. Outlet 1
The salt water mixed with air bubbles flowing out of 2a is reflected on the inner surface of the water tank 11, and is diffused to almost the entire area in the water tank 11.

As described above, the salt water flows along with the bubbles, and the salt water in the training tool 12 flows out of the outlet 12a.
From 2b, the surrounding salt water flows into the training tool 12. As described above, the salt water that has flowed into the training tool 12 flows upward together with the air bubbles and flows out of the outlet 12a. Thereby, the salt water in the water tank 11 is circulated.
Therefore, the salt water in the water tank 11 is sufficiently supplied with oxygen throughout.

In this case, since the stone 14 that radiates air as bubbles is surrounded by the training tool 12, the bubbles may float only in the training tool 12 and diffuse around the training tool 12. There is no. Therefore, the salt water around the training tool 12 is not likely to be disturbed by the bubbles emitted from the stone 14. Moreover, since the salt water in the water tank 11 is circulated by air bubbles floating inside the training tool 12, the circulation is extremely gentle. In particular, near the water surface of the salt water, the bubble-mixed salt water flowing out from the outlet of the training tool 12 flows in the horizontal direction along the water surface, and there is no possibility that the water surface and its vicinity are disturbed.

The larvae of the brine shrimp in the salt water usually grow in a floating state at and near the water surface, and therefore sufficiently absorb oxygen from air bubbles flowing out of the outlet 12a of the training tool 12. Can be.

Further, since the respective inlets 12b provided below the training tool 12 are provided above the stone 14, the salt water in the water tank 11 is circulated above the respective inlets 12b. Will be. Therefore, since salt water does not circulate at the bottom of the water tank 11, foreign matters such as the excrement of larvae of the brine shrimp are settled at the bottom of the water tank 11, and the circulated salt water is always kept in a clean state. Is done.

As described above, the larvae of the brine shrimp are cultivated in a clean and calm area near the water surface in a state where sufficient oxygen is supplied.
It is trained to an adult about 1 cm in length in 2-3 weeks. It has been confirmed that such a training apparatus 10 can train brine shrimp larvae to adults with a probability of 90% or more.

In the above embodiment, each end face of the training tool 12 is open, but each end face may be closed. Moreover, the training tool 12 is not limited to a cylinder,
The cross section may be a cylinder such as a triangle or a square.

[0025]

As described above, the apparatus for cultivating marine feed organisms of the present invention can sufficiently supply oxygen to the cultivation water for cultivating feed organisms without disturbing the cultivation water. In addition, very delicate marine feed organisms such as brine shrimp larvae can be efficiently grown to adulthood.

The training device of the present invention used in the training device has a very simple structure and is easy to manufacture.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an example of an embodiment of a marine feed organism training apparatus of the present invention.

FIG. 2 is a sectional view of the training device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Training device 11 Water tank 12 Training tool 12a Outlet 12b Inlet 13 Ventilation tube 14 Stone

Claims (6)

[Claims] 1. A water tank containing training water for cultivating marine feed organisms, a gas dispersing device for dispersing air or oxygen to the training water in the water tank, and the gas dispersing device is disposed in a bottom portion. It has a tubular shape that is vertically arranged in the water tank in a state where it is provided, and an inflow port for inflow of training water is provided in the lower peripheral surface,
A training device provided with an outflow port at an upper end thereof for allowing the internal training water to flow out along the water surface. 2. An apparatus for cultivating marine feed organisms according to claim 1, wherein the inflow port of the cultivation tool is located above a gas-dissipating tool disposed in the bottom of the cultivation tool. 3. An upper end surface of the training tool is at the same level or higher as a water level of the training water, and the outlet is cut from the upper end surface of the training tool over an appropriate vertical length and circumferential length. 2. The apparatus for cultivating a marine feed organism according to claim 1, wherein the apparatus is formed by being chipped or perforated. 4. The apparatus according to claim 1, wherein the marine feed organism is a larva of brine shrimp. 5. A training tool used in a water tank containing training water for cultivating marine feed organisms, which is installed vertically in the water tank and has air or oxygen in the bottom thereof. It has a tubular shape in which gas dissipating devices that dissipate are arranged, and the lower peripheral surface is provided with an inflow port through which training water flows into the inside, and at the upper end, the inside training water flows along the surface A breeding tool for marine feed organisms, characterized in that an outlet for the effluent is provided. 6. The breeding tool for marine feed organisms according to claim 5, wherein the marine feed organisms are larvae of brine shrimp.