JPH09233965A - Method for artificial fertilization and breeding for sea eel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce a lot of sea eels by artificially fertilizing sea eels on specified conditions and breeding them later while using micro-planktons in the seawater. SOLUTION: The artificial fertilization of sea eels is perfectly performed on the conditions that the water current is prepared in a water tank for 10 tons of water 2 having the water temperature from 14.0 deg.C to 29.0 deg.C, fresh seawater is supplied for 0.2-1.5 ton in every 10 minutes, water streams is 0.02-0.3 mile, the specific gravity of seawater is 0.80-1.040, and the quantity of oxygen in seawater is 5.0-8.0ppm. Concerning hatching and breeding, it is considered to collect a lot of seawater micro-planktons on the conditions that a water current is prepared in the water tank for 10 tons of water 2 having the water temperature from 14.0 deg.C to 29.0 deg.C, fresh seawater of 0.3-2.0 tons is replenished at the interval of 10 minutes, the water stream is 0.01-0.3 mile, the specific gravity of seawater is 0.90-1.050, and the quantity of oxygen in seawater is 5.5-9.0ppm. Concerning submarine performance biological instinct and the submarine concentration of baits, the condition of one fish per 3mm<2> or 15mm<2> is established. When the concentration is lacked, the artificial fertilization and breeding of sea eels is performed while using Rotatoria and brine.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION The present invention can produce a large amount of duck that could not be produced until now, and is useful for the development of artificial diet for other fish.

2. Description of the Related Art According to the records in water trials of each prefecture of Fisheries University, regarding fertilization, fertilization, and hatching, forced fertilization is performed by opening the abdomen or extruding by hand without waiting for the parent fish to spawn. However, the fertilization was not completed completely, and even if it hatched, it was in a preterm birth state, entered the feeding process, and died in a short time.

[Problems to be Solved by the Invention] Complete fertilization and feeding method of duck.

[Means for solving the problem] We found a place where the female fish of the duck was laying eggs on its own, and devised sperm release thereby solving complete fertilization. In the feeding process, we developed a new plan that could collect and collect small seawater plankton, and could solve the feeding problem.

[Function] As a function of spawning fertilization of the duck, a water tank of 10 tons of water is used, and sea water enters about 0.7 tons in 30 minutes, the water flow is 0.05 miles, the water temperature is 23 degrees from 20 degrees, and the sea water specific gravity is 1 0.023, seawater oxygen content 7.9PPm, 3 female parent fish
I waited 5 hours from the tail and waited long enough for the female fish to spawn by myself. After the female fish have spawned, 25 to 30 sperm fish are put into the aquarium to form a completely fertilized egg, and after hatching, they are fed as vigorous juveniles in a feeding tank with a water volume of 50 tons. It is a thing.

[Examples] The spawning season of the ducks is from July 1st to August 15th, and the best period within the deadline is the latter half of July. The ratio of male and female fish that cause spawning fertilization is
At the ratio of 1 female fish to 10 male fish, we found only 5 egg-bearing fish that the female brood fish still spawn, out of about 800 ducklings, and put them in the fertilized water tank for swimming. . Amount of water 10 tons new seawater is 0.7 tons in 30 minutes, seawater oxygen amount 7.9PP
m, seawater specific gravity 1.023, water temperature 24 degrees, the size of a female fish is 5K to 8K, and the size of a male fish is 400g to 7K.
Since it is difficult to select male fish, it is recommended to prepare 45 fish which are considered to be male fish. After about 7 hours, I could see flickering eggs in the aquarium, so I thought that it was a male fish that I had prepared, a middle part of the abdomen to confirm sperm, a place where sperm popped out even by touching with a knife, If you cut it a little at the tip of, the sperm will come out. The wound is about 1 cm from 7 mm and does not affect the life or death of the duck. All 40 fishes are put in the aquarium, and while waiting for the time to stop the entering water, the female fish begins spawning and becomes the best fertilization. Fertilized eggs are about 2 mm to 2.3 mm in size, and good eggs float and bad eggs sink. A good egg is hard like a rubber ball and has light. When magnified with a lens, the inside is clear and shining. Fertilization is completed in about 20 hours after inserting a female fish, and in the hatching process, fertilized eggs are placed in the feeding water tank, the water temperature is 24 degrees, no water flow, no water is input, seawater oxygen is 7.8PPm, and seawater specific gravity is 1.
At 022, the inside of the aquarium is darkened and awaiting for hatching. From around 25 hours, a semi-circular body shape can be seen. About 45 hours,
The fish can be clearly seen, and the fish gradually move, and the movement becomes more intense over time, and the hatching starts at about 65 hours and ends at about 75 hours. Body length is 13 mm to 15 m
It is the mth place. For the first time, it became a juvenile duck. Number is 3
It was possible to have about 4 to 4 million fish. 20 fry fry
Although it does not eat food for a while, it collects small plankton from the sea and pours them into the aquarium with seawater. Plankton has a body length of 0.2 mm to 0.3 mm, and begins eating food at about 27 hours. 4m in water and the instinct to open and close the mouth and the bouncing power of a small plankton
³ to 1 to 15 mm ² with one bait per m ²
The invention in which the plans were combined and fed was able to develop feeding.

As a result of the development of this invention, if a large amount of ducks, which were said to be a ghost fish of the Japanese archipelago, were artificially fed and released into the natural sea, not only the promotion of the fishing industry but also the impact on the fishermen would be valued. The more unknown, the more remarkable the effect.

[Small-scale plankton segregation collection] Seawater plankton have the habit of gathering in bright places, and it is good to collect them with an underwater light at night. In the natural sea, all fish lay eggs, hatch and become juveniles. The first bait that starts eating habits by searching for food is the subsea plankton, which is also large, medium and small. It can be divided into 3 types, and since they can be eaten only by small size immediately after hatching, they can be invented, and what was developed can be collected separately by mesh. Small plankton body length 0.2 mm to 0.3 mm Netting 0.5 mm Medium size plankton body length 0.6 mm to 0.7 mm Netting 1.0 mm Large plankton body length 1.0 mm to 1.
3mm mesh size 1.5mm As the fry grows larger, so does the food.

[Procedure amendment]

[Submission date] August 7, 1996

[Procedure 3]

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[Title of Invention] Artificial fertilization feeding method for duck

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[Brief description of drawings]

FIG. 1 is a three-dimensional view of seawater plankton collected by segregation. The bottom 40 cm square is entirely made up of a net basket with a bottom of 0.5 mm, and it is tightly bound with a 5 mm rope in FIG. Below the place is one net basket, which can be freely collected and collected depending on the size of the net basket. If the basket's eyes are 0.5 mm, the only plankton that can enter the net is 0.5 mm or less.
Do not put anything over 5 mm. This idea was devised to collect live bait that fits the mouth of fry, and a submersible lamp is fixed to the submersible pump in the net basket, and the direction of light of the submersible lamp is the suction hole of the submersible pump. When shining only in the direction, the plankton starts the submersible pump at the place near the suction hole of the pump, and when the submersible pump is started, all the plankton coming near by the suction force of the pump is sucked into the pump, and it is 1 The seawater in the tank is sent to the net basket and the seawater in the aquarium overflows to the outside, but the plankton enters the receiver net and replaces the net basket in about 3 hours, and pumps according to the process of growing young fish. Figure showing the plankton's segregation method of matching the mesh of the fish to the mouth of the fry.

[Procedure correction 6]

[Document name to be amended] Drawing

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FIG.

[Procedure amendment]

[Submission date] March 22, 1997

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[Title of Invention] Artificial fertilization feeding method for duck

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

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[Brief description of drawings]

FIG. 1 is a three-dimensional view of seawater plankton collected by segregation. The bottom 40 cm square is entirely made up of a net basket with a bottom of 0.5 mm, and it is tightly bound with a 5 mm rope in FIG. Below the place is one net basket, which can be freely collected and collected depending on the size of the net basket. If the basket's eyes are 0.5 mm, the only plankton that can enter the net is 0.5 mm or less.
Do not put anything over 5 mm. This idea was devised to collect live bait that fits the mouth of the fry, and a submersible lamp is fixed to the submersible pump in the net basket, and the direction of the submersible lamp's light direction is the suction hole of the submersible pump. When shining only in the direction, the plankton starts the submersible pump at the place near the suction hole of the pump, and when the submersible pump is started, all the plankton coming near by the suction force of the pump is sucked into the pump, and it is 1 The seawater in the tank is sent to the net basket and the seawater in the aquarium overflows to the outside, but the plankton enters the receiver net and replaces the net basket in about 3 hours, and pumps according to the process of growing young fish. Figure showing the plankton's segregation method of matching the mesh of the fish to the mouth of the fry.

[Instructions by unit for all drawings in Fig. 1] Plankton enters the cage with a mesh of 0.2 mm. Water tank Land Underwater Underwater light cable Underwater pump cable 50mm Water absorption pipe 5mm Rope tightly tied up the net and cables coming from the bottom. 40cm4 surface is made with a stainless 10mm rod and the mesh is 0.5
A net basket of 40 cm × 40 cm, 40 cm square and 40 cm square and 80 cm long is made with a mm net, and the square made with a stainless steel rod is inserted into the net basket to fix the stainless steel and the net. (10) Insert the submersible pump 25 mm to 50 mm into the net basket. (11) Fix 100 to 500 watts of the middle lamp to the submersible pump. ▲ 12 ▼ Water inlet of submersible pump ▲ 13 ▼ Direction of submersible light ▲ 14 ▼ Direction of submersible light ▲ 15 ▼ Distance from seabed to net 1 rice

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Claims (4)

[Claims] Population fertilization of ducks 1. Amount of water 1 (from water temperature 14.0 degrees to 29.0 degrees)
Create a water flow with 0 ton water tank, and fresh seawater in 10 minutes from 0.2 ton to 1.5 ton, water flow 0.02 to 0.3 miles, seawater specific gravity 0.80 to 1.040, seawater oxygen content 5. 0PPm
Completely fertilized with 8.0PPm for hatching and feeding 2. A water temperature of 14.0 to 29.0 degrees, 10 ton water tank is used to make a water flow of 0.3 to 2.0 tons of fresh seawater in 10 minutes, and water flow of 0.01 miles to 0. 3 miles, seawater specific gravity 0.90 to 1.050, seawater oxygen content 5.5PPm
From 9.0 PPm 3. A large amount of small seawater plankton was devised, and its performance in water, biological instinct and density of food in water were devised. 4. A method for artificial fertilization feeding of a duck using rotifer or brine when the density is insufficient (1 fish in 3 mm ² to 1 fish in 15 mm ² ).