JPH06181697A - Method for attaching, recovering and feeding floating larval type spat, method for feeding fishes and feeding plate - Google Patents

Abstract

PURPOSE:To improve the attachment, recovery and feeding of a floating larval type spat, etc., and the feeding efficiency, etc., for fishes by solidifying a feed using agar, etc., as a base and stationarily placing the feed in the sea. CONSTITUTION:A feed for feeding a floating larval type spat, etc., is composed of a pasty base made of seaweeds as a raw material and the seaweeds. The feed for feeding is then filled in the interior of a framework 2 stretched with a net member 3, solidified into a platy feed 4 and fixed in the framework with the net member 3. The resultant platy feed 4, together with the framework 2, is stationarily placed in sea water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting and feeding juveniles such as sea urchins and abalone floating in the larval stage, a method for feeding cultured fish, and a feeding plate used for these feeding methods.

[0002]

2. Description of the Related Art Feeding in the production of seedlings such as sea urchins and abalone has hitherto been carried out by placing a corrugated synthetic resin plate in the sea and naturally growing diatoms and other algae attached to the synthetic resin plate. In fish farming, artificial feed is fed by sowing.

[0003]

The production of seeds and seedlings described above takes time because the feed is produced based on the natural fertility, and various obstacles and enormous costs are required. Since artificial feed can be used in fish culture, there is no problem as described above, but since most of the feeding is by sprinkling bait, seawater stains easily occur due to residual bait, and from long-term pollution of the growing environment in the same sea area. Various problems are occurring.

The present invention was conceived in order to solve the above-mentioned conventional problems, and the purpose thereof is to produce natural feed regardless of natural fertility, and to produce sea urchins, abalone and the like as they are. It is to provide a new method that can be used for collecting and feeding floating larvae-type fry and shellfish.

Another object of the present invention is to provide a feeding method capable of feeding cultured fish without depending on the sowing bait and adjusting the feed components according to the fish species or according to the aquaculture environment and conditions. It is in.

Still another object of the present invention is to provide a feeding plate having a new structure capable of efficiently carrying out the above method.

[0007]

[Means for Solving the Problems] One of the inventions according to the above object is to construct a feed for a floating larva type fry and the like to feed from a seaweed-based paste and a seaweed as a raw material. It is to fill the feeding feed into the framework with the mesh member stretched and solidify it into a plate-like feed, and fix it in the framework by the mesh member and place the plate-like feed together with the framework in seawater. .

In the present invention, if necessary, in addition to seaweed, a paste-like base is mixed with a feeding attractant such as a floating larvae and a sticking attractant to promote the feeding activity. It is possible to improve the recovery property and the recovery efficiency.

According to another aspect of the present invention, a fish-based feed is mixed in a glue-shaped base made from seaweed, and the mixture is filled in a frame having a mesh member stretched to form a plate. It is to solidify the feed and fix it in the framework by the net member, and place the plate-like feed together with the framework in seawater.

Still another aspect of the present invention is that a frame having a predetermined shape in which a mesh member is stretched in the plane is filled, and the frame is filled and solidified into a plate shape, and is fixed in the frame by the mesh member. The feeding plate is composed of a plate-shaped feed made of seaweed in the form of paste.

The above-mentioned framework is usually made of wood, but considering the environmental problems caused by being left in seawater,
It is preferable to use a substance that dissolves in seawater after a long period of time, for example, a water-soluble resin such as casein or polyvinyl alcohol.

Similarly, the mesh member is preferably a mesh made of gauze or a water-soluble resin fiber, and the mesh size is 1 mm to 20 mm.
The range is good. If the mesh is too small, the fixing of the base is bad, and if it is too large, the base is easily fixed in seawater and then easily falls from the framework. Further, the mesh member is stretched in the center of the inside of the frame, but may be stretched close to one surface in some cases.

The above-mentioned feed is based on agar and the like, diatom,
Seaweeds such as sea lettuce, seaweed, and kelp are cut into the required size and mixed, or seaweeds of the required length are planted in the base. In the case of planting, the paste-shaped base is placed in the framework. It may be done after filling. In some cases, the seaweeds may be placed in the framework first, and then the paste-like base may be filled to solidify.

[0014]

[Working] In the method for feeding floating larvae, such as juveniles, it is possible to form feed by incorporating seaweed containing feeding stimulants that larvae such as sea urchins easily collect, so that natural breeding Larvae floating in seawater are more likely to attach than in the case, and feeding efficiency is improved than before.

In addition, in the method for fish, it is possible to easily perform a component-adjusted feed according to various conditions such as the type of fish or sea area and environmental settings, and to compare the feeding with granular feed with the remaining feed. The situation can be quantitatively grasped, and the feeding plan can be rationalized. In addition, the marine environment can be prevented from being polluted due to the dispersal of residual food, and as a result, the growing environment can be maintained in a favorable condition for a long time.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 in the drawing is a feeding plate, which comprises a quadrilateral frame 2, a net member 3 stretched in its plane, and a plate-shaped feed 4 solidified in the frame plane.

The frame 2 is composed of a pair of front and back wooden frames 21, 22.
Is manufactured by fitting the dowels 23 and the receiving holes 24 provided on their joint surfaces so as to be integrally fitted to the front and back sides. , 26 are provided.

The mesh member 3 is made of gauze having a mesh of about 3 mm, and the periphery is sandwiched between the wooden frames 21 and 22 and stretched in the center of the plane of the frame 2.

The plate-shaped feed 4 is composed of a plate-shaped base in which a paste-shaped base such as agar made from seaweed is filled in the surface of the frame 2 and is appropriately solidified into a jelly. It is fixed in the framework by the mesh member 3.

The plate-shaped feed 4 contains a feed suitable for the purpose of feeding. When feeding is intended for floating larvae such as sea urchins, seaweed 41 such as diatoms and sea lettuce cut into the required size is mixed, and the seaweed and the paste-like base are used as feed forage. Is configured. Also, when feeding fish, the granular feed is mixed as feed, though not shown.

The amount and density of the feed mixed can be adjusted according to the conditions of the growing sea area, the type of fish, and the like, and if necessary, a feeding attractant, an adhesion attractant, etc. such as floating larvae fry can be mixed. , Sea urchin and the like can be easily adhered to increase the feeding activity.

The feed is mixed in before the paste-shaped base is filled in the framework. Further, it is preferable to cut and mix some seaweed so that a part of the seaweed is exposed on the surface to some extent. As shown in the figure, the paste-like base is filled from both sides because the net member 3 is located in the center of the plane, but when the net member 3 is stretched to the back side in the plane, it only needs to be filled from one side. .

As shown in FIG. 3, such a feeding plate 1 is vertically placed in seawater by a float 27 and a weight 28. It can be built and used. Larvae such as sea urchins and abalone floating in seawater attach to the feed board 4 and feed.

Feeding is actively performed until the plate-shaped feed 4 is almost exhausted, but since the feeding amount can be made larger than that of feeding natural seaweed, it takes a long time to completely eat and move to another place. . In addition, since the amount of food intake can be experimentally or empirically known in advance, before the plate-shaped feed 4 is consumed, the feeding plate 1 is pulled out from the seawater, and the larva attached to it is collected and collected. There is no difficulty in doing so, and recovery can be performed efficiently.

[0025]

Since the present invention is constructed as described above, it has the following effects.・ Because the seaweed-based paste and seaweed were used to construct a feed that is fed by floating larvae and larvae, the production of feed is more than when feed is produced based on natural fertility. Since it does not require time and cost, seaweeds that sea urchins can easily feed can be selected and used as feed, so there is no waste, and the collection and feeding effects of floating larvae fry and shellfish are better than ever. improves.

The seaweed sea urchin can be attached to the sea-urchin-like base to enhance the feeding efficiency and feeding efficiency of the floating larvae-type juveniles, etc. Yield in seed production is improved.

[0027] The feeding feed comprising a paste-shaped base and seaweed is filled inside the framework with the mesh member stretched to solidify into the plate-like feed, and since it is fixed in the framework by the mesh member, the plate is fixed. Since the framework doubles as a forming die for forming shaped feed and the plate-shaped feed is placed in seawater together with the framework, it does not take time and effort to form and place the feed, and labor can be saved. You can

As feeding of cultured fish, unlike the case of sprinkling bait, since the feed does not dissipate in seawater, feeding efficiency is improved and various conditions such as fish type or sea area Not only can you easily adjust the composition of feed according to the environment settings, but you can also quantitatively understand the status of remaining food,
The feeding plan is rationalized, and even if leftover food is produced, it can be pulled up together with the framework and disposed of on land, thus preventing pollution of the sea area due to dissipation of leftover food and maintaining favorable growth conditions in the same sea area for a long period of time. .

[Brief description of drawings]

1 is a cross-sectional view of a feeding plate capable of carrying out the method according to the present invention.

FIG. 2 is a front view of the feeding plate with a part thereof also removed.

FIG. 3 is a perspective view showing a stationary state of a feeding plate in seawater.

[Explanation of symbols]

 1 Feeding Plate 2 Frame 3 Net Member 4 Plate Feed 21 Wooden Frame 22 Wooden Frame 23 Dowel 24 Receiving Hole 25 Float Mounting Tool 26 Weight Mounting Tool 27 Float 28 Weight

Claims (4)

[Claims] 1. A feed for feeding floating larvae, such as juveniles, is composed of seaweed and a paste-shaped base made from seaweed.
The feeding feed is filled inside a frame with a net member stretched to solidify into a plate-shaped feed, and the plate-shaped feed is fixed in the frame by the net member and placed in seawater together with the frame. A method for collecting and feeding the floating larva type juveniles, etc. 2. The adherence recovery and feeding of the floating larva type fry and the like according to claim 1, wherein the paste-like base is mixed with a feeding attractant substance such as the floating larva type fry and the like, an adhesion attractant substance and the like. Method. 3. A fish-based feed is mixed in a seaweed-based paste-shaped base, and the mixture is filled into a frame-shaped frame overlaid with a net member to solidify the plate-shaped feed. A method for feeding fish characterized in that it is fixed in a framework by a net member and the plate-like feed is placed in seawater together with the framework. 4. A frame having a required shape in which a net member is stretched in-plane, and a paste-shaped seaweed which is filled in the frame and solidified into a plate and fixed in the frame by the net member is used as a raw material. And a plate-shaped feed.