JP3429729B2 - Methods for catching and arranging larvae and methods for transporting them - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for capturing white salamanders, a method for rearing after capturing the white salamanders, and a method for transporting the salamanders.

[0002]

2. Description of the Related Art The white-necked fish described in this specification can be caught nationwide with a year-long fish with a body length of about 10 cm, whose main living area is Lake Kisui. Many are known as specialty products. The fishing season of the white-necked fish in Lake Ogawara is from April to June 20 and from September 1 to the following year 3
In addition to the cool spring air as on the 16th of the month, fishing is possible from autumn to winter.

The characteristic of the white-necked fish (fish catching method) is to catch the white-tailed fish that swim in groups in the upper part of the lake by scooping the surface of the water with a fine mesh. Since the fish is a delicate and very delicate fish, if you don't put the net in immediately and pull it up quickly, the fish will be easily damaged and weakened.

[0004] As a general conventional fishing for white-necked fish, boat-towed fishing (see Fig. 8) and purse net fishing (see Fig. 9) are known.
For fishing boat fishing, a boat of 5 ton class with a total length of around 10m is operated by 4 to 5 people in one boat. The net consists of a tow net 2 having a total length of about 250 m and a catch net 1 located at the tip of the tow net 2 and having a length of about 10 m for catching fish. The catching net 1 has a tip opening 10, and the tip opening 10 is tied with a rope 11 to close it. After such a net is set in a large circular shape by the ship 4, the ship 4 is fixed by the anchor 3,
Rolling up the circular tow net 2 to narrow it down,
Finally, the fish is driven into the bag-shaped catching net 1, and the catching net 1 in which the fish is collected is pulled up on the ship 4 at once. Then, the knotting rope 11 at the tip opening 10 of the catching net 1 is unraveled and opened, and the fish is put into a transporting colander or the like for catching, and smelt and the like can also be caught.

In the purse-net fishing, a bag-like catching net 70 having a tip tied with a rope is provided at the tip of the net 7 as shown in FIG. It is due to the net set in. The purse-net fishing is a method of catching the fish that has entered this portion by going to this fixed place by boat every morning in the morning, pulling up the catch net 70 on the boat. A similar fishing method is trawl net fishing, but nets smaller than purse net fishing are used, and purse net fishing is included in this specification.

[0006] Furthermore, the properties of white-tailed fish are delicate and have a very short survival time after being pulled up from a net to a ship. As a breeding survival record after capturing, breeding as a growth record for research was only known for a long time, and it was known that the breeding method was difficult. Moreover, even with the breeding method using the lake water in which it was lived, it was difficult to breed and only survived within a few hours.

[0007] In addition, shirauo are known for their lighter and more delicate taste than those of the below-mentioned white swordfish, and due to their refined appearance, they were not allowed to take a break without boarding a fishing boat immediately after capture and eating with a fisherman. .

The salamander of the genus Silauo is often confused with the goby of the family Goby, but these two species are taxonomically different species and are distant from each other, and their properties and morphology are quite different. . The white-faced chinacea has a squared jaw, which is unique to the goby family.It is a special product only in spring, has a strong vitality and is easy to survive after capture, unlike the white-breasted fish, so it is often served as a live meal before meals. Known to be done. In addition, the product value of white-tailed sardine will drop significantly if it is not alive.

[0009]

[Problems to be Solved by the Invention] Since the salamander has the delicate characteristics as described above, the conventional capturing method is
In order to lift the catch nets A and B on the ship, the fish that has been driven in is caught by the tip part and is squeezed in both the tug fishing and the purse seine fishing. Due to the pressure and temporary exposure to air, Silauo died in a short time after being put on board. Therefore, even if it is desired to eat and eat the salamander, it is impossible unless it is eaten immediately after it is captured with a fisherman on the fishing boat for the fishing of the salauo, and it is difficult for the general public to eat and eat the salamander.

[0010] Furthermore, since a breeding method and device capable of properly breeding salamanders are not known, breeding for several days after capture is difficult, and salamanders survive like salamanders that look similar. It was also impossible to provide it at a land-based restaurant or restaurant while leaving it.

The present invention is a method of capturing a salamander that can be utilized for a long time after capturing the salamander, a breeding method after capturing the salamander, and a long-term storage of the salamander.
The purpose is to propose a method for long-distance transportation, and also to provide it before meals while utilizing the salamander in land restaurants and restaurants.

[0012]

[0013]

[Means for Solving the Problems] In order to solve these problems, in boat-towed fishing, there is no corner on the inner surface of the fishing net with fish such as whitefish, which is lowered onto the surface of the lake before it is raised on the ship. After transferring fish such as whitefish into the container and pulling up the first container on board, salt water with a salinity of 0.4-0.7% is about 25 cm deep at the same temperature as the temperature of the lake water to be captured.
After filling the aerating container with aeration and no corners on the inner surface with silauo alone within 80% of the water surface area, the container is transported to a breeding facility on land and used as a breeding container. We propose a method of catching salamanders, which is characterized by inserting them.

Further, in purse seine fishing, before raising the purse net containing fish such as whitefish, onto the ship, unravel the rope connecting the end of the catch net of the purse net, and hang the corner on the inner surface lowered onto the lake surface. Transfer the fish such as whitefish into the first container without
After pulling up the 1st container on the ship, salt water with a salt concentration of 0.4-0.7% was put at a depth of 25 cm or more at about the same temperature as the temperature of the lake water to be captured. There is no transport container, only the sea eel is 8
We propose a method for catching white-necked salamander that is characterized by transporting the transport container to a breeding facility located on land after placing it in an amount of 0% or less.

Further, in purse seine fishing, before raising the purse net containing fish such as whitefish, etc. onto the ship, unravel the rope that connects the end portion of the catch net of the purse net and bring the fish from the open net to near the water surface. It is positioned and thrown into the enclosure where the water surface is open, and the fish such as whitefish that enter the enclosure are placed in the first container with no corners on the inner surface and only the whitefish is captured from the first container. Almost the same as the temperature of the lake water
0.7% salt water at a depth of 25 cm or more is put in a container with aeration and no corners on the inner surface within 80% of the water surface area, and immediately transported to a breeding facility on land for breeding. We propose a method of catching white-necked salamander that is characterized by putting it in a container.

[0016]

[0017]

[0018]

1 shows an embodiment of the present invention.
It will be described with reference to FIG. First, a method of capturing white salamfish will be described. The capture method of the first embodiment is a capture method by boat tug fishing. For tug fishing, as shown in the explanatory view of FIG. 8, a boat 4 of 5 ton class with a total length of about 10 m is used, and a boat is operated by 4 to 5 people. For tug fishing, as shown in FIG. 8, a tug net 2 having a total length of about 250 m provided with a catch net 1 having a length of 10 m, which is tied with a tip opening 10 at the tip and tied with a rope 11, is used. After manipulating the ship 4 to fix the tow net 2 which was set in a large circular shape, the ship 4 was fixed by the anchor 3, and then the hoisting net was gradually wound up and the circular shape of the tow net was gradually narrowed to form a bag containing fish containing Shirauo S. Drive into capture network 1.
The hoisting work is temporarily interrupted in a state where the boat towing net 2 is narrowed and the catch net 1 is driven into by the fish containing the sea urchin S. In this stopped state, the tow net 2 of usually 250 m is almost wound up on the ship, and the catch net 1 having a length of about 10 m has the tip opening 10 located on the rear side of the ship 4.

Next, untie the tie rope 11 of the catch net 1,
The tip opening 10 is raised above the surface of the lake so that the caught fish cannot escape, the tip opening 10 is widened, and there is no angle on the inner surface of the lake near the opened tip opening 1
Lower container 8 and float. Fish, such as whitefish, are transferred into the first container 8 through the open end 10 using a ladle, a scoop net, or the like. At this time, the water in the first container 8 is the same as the temperature of the lake water LW or the temperature of the lake water to be captured, and the salt water SW having a salinity of 0.4 to 0.7% is stored at a depth of 25 cm or more. In general, the number of fish species that can be caught in boat-towed fishing is small, and in addition to shirau, it is about smelt. First
The container 8 is provided with a handle 80 so that it can be easily pulled up from the surface of the lake to the ship.

Next, after pulling up the first container 8 onto the ship,
The salinity of 0.4-
0.7% salt water SW with a depth of 25 cm or more is attached to the container 5 with aeration 50 without corners on the inner surface.
Transfer in an amount within%. The amount of silauo S introduced into one transportation container 5 is suppressed to 80% or less of the water surface area of the container, and the smaller the amount, the higher the survival rate. This is because the sea salam swimming and living on the surface of the water. The number of transport containers 5 is
It is an appropriate number depending on the catch of white-tailed fish. The transportation container 5 containing the salamander is capped and transported to a fixed breeding facility on the land as soon as possible, preferably within one hour, and then placed in the breeding container 6 to calm the salamander S. In the case of boat-towed fishing, since there is little space for the carrying container 5 on the ship due to the hoisting nets 2, the carrying container 5 is transferred to a barge (not shown) and then moved to the breeding container 6 on land. You may change.

The transport container 5 has a height of 43 in this embodiment.
It is a truncated cone with a lid of cm, upper diameter 52 cm, and lower diameter 36 cm. An aeration 50 having a battery-type aeration motor 51, a packing 52 and an air stone 53 is provided in the transportation container 5, and the salt concentration is 0.4 to 0.7%, preferably 0.
6% salt water SW with a depth of 25 cm or more, preferably 30 c
Insert more than m.

As another example of the first embodiment, the transport container 5 may be used like the first container 8. That is, the tip opening 10 of the catch net 1 is raised above the surface of the lake so that the caught fish cannot escape.
The container 5 for transportation is lowered and floated on the surface of the lake near the opened tip opening 10. In this case, transport container 5
As the water to be put in, salt water SW having a salinity of 0.4 to 0.7% is placed at a depth of 25 cm or more at a temperature almost the same as the temperature of the lake water to be captured, and a handle (not shown) is also attached to the transport container 5. . After transferring only the salamander directly from the open end opening 10 of the capture net 1 with a ladle, scoop net, etc.,
Pull it up on the ship and attach a device of aeration 50, or put solid oxygen into the container and then close the lid,
Using a barge, etc., it is transported to a fixed breeding facility on land as soon as possible, preferably within one hour, and it is placed in the breeding container 6 to calm the salamander S.

Next, the capture method of the second embodiment will be described. The capturing method in the second embodiment is a capturing method by purse net fishing (trout net fishing). As shown in FIG. 9, the purse-net fishing is performed by a catch net 70 and an enclosure net 7 in which it is difficult for the fish to go backwards at the tip of the bag net 7 placed at a depth of 2-3 m in the lake water.
1 is provided. It is the tip opening 72 of the catching net 70 and is tied by a knot rope 73. In the installed state, the tip opening 72 is closed.

[0024] Shirauo S wanders near the shore for spring spawning
Go to the place where the bag net 7 containing is set in the early morning. A relatively large circular first container 8 with no corners on the inner surface and a transportation container 5 with an aeration 50 and no corners on the inner surface are brought to the ship 4. The first container 8 and the carrying container 5 are the first container 8 and the carrying container 5 of the first embodiment.
And the container 5 for transportation has a salinity of 0.4 to 0.7% at a temperature almost the same as the temperature of the lake water to be captured in advance.
Preferably, 0.6% salt water SW is placed at a depth of 25 cm or more, preferably 30 cm or more.

In this embodiment, the first container 8 is a cylindrical container having a diameter of 100 cm and a height of 40 cm as shown in FIG. 5, but a container having a larger diameter is preferable if it is loaded on a ship. Further, it is preferable to provide the handle 80.

Next, the tie rope 7 of the catching net 70 of the bag net 7
3 is opened to open the tip opening 72 to raise the net above the lake surface so that the caught fish cannot escape, the tip opening 10 is widened, and an angle is formed on the inner surface of the lake near the opened tip opening 10. Then, the first container 8 without the container is unloaded, and a fish such as a salamander is transferred into the first container 8. At this time, the first container 8 is filled with the salt water SW having a salt concentration of 0.4 to 0.7% at the same temperature as the temperature of the lake water LW or the lake water to be captured. In general, many fish species are caught in purse seine fishing, and it is highly possible that various sizes of fish are caught in addition to white fish, and white fish is easily damaged by large fish. After putting only the salamander into the first container 8 with a ladle, a scoop, etc., if possible, hold the handle 80 and pull it up from the surface of the lake to the ship. Immediately from the first container 8 transferred to the ship, only the salamander S is transferred to the container 5 for transportation with a scoop net, a net for tropical fish, or the like.

The amount of silauo S loaded into the transport container 5 is
The amount of water is limited to 80% or less of the water surface area of the container, and the smaller the amount, the higher the survival rate. Second container 5 with an appropriate amount of Shirauo S
With a lid, it is transported as soon as possible, preferably within one hour, to a fixed breeding facility on the land and placed in a breeding container 6 to calm the salamander S.

Next, a catching method of another example of the second embodiment by bag net fishing will be described. The catching method in another embodiment is as follows.
The catching net (Moji net) 70 of the bag net 7 placed at a place of ~ 3 m
An enclosing net 71 is provided at the tip of the front end opening 72 of the. In this embodiment, the tip opening 72 is normally open.
The enclosure net 71 is a circular net in plan view and floats at the top 74
The water surface of the lake is closed with a circle. The depth of the enclosure 71 is 2-3 m.

The fish such as white salmon S which has entered the catching net 70 swims into the surrounding net 71 through the tip opening 72. Various fish other than Shirauo S are contained in the enclosure net 71, and the water surface is open, so the fish such as Shirauo S are floated on the surface of the lake by a ladle, a scoop net, etc. Transfer to the first container 8. When the salamander or the like is moved into the first container 8 from the enclosure net 71 to some extent, the first container 8 is pulled up on the ship. Next, only the salamander S is immediately transferred from the first container 8 to the container 5 for transportation with a scoop net, a net for tropical fish, or the like.

Further, the Shirauo S transported to the land has a water volume of 1 m3 or more and a purifying device 6 having no corners on the inner surface.
The animals are bred in a breeding container 6 which is a water tank with 0. The breeding container 6 of this embodiment has a length of 180 cm and a width of 90 c.
The purification device 60 is provided in a container of m and 40 cm in height.
The purification device 60 is a device that circulates and purifies the breeding water taken from the strainer 62 by the circulation pump 61 from the discharge elbow 63 through the filter medium 64. All the corners of the breeding container 6 are formed as curved surfaces.

The container 6 for breeding has a salinity of 0.4 at a temperature substantially the same as the temperature of the lake water in which the salamander S is captured.
~ 0.7% salt water W, preferably 0.6% salt water SW
Are kept at a depth of 30 cm or more and are bred in this state. Since the temperature of the lake water varies depending on the season, the temperature of the lake water is kept at 2 ° C or lower in winter and 20 ° C or higher in summer, and the breeding water is kept at a temperature within the range. A plurality of breeding containers 6 are provided, and preferably three or more water tanks are provided. If there are three aquariums, they will be placed in separate aquariums every day when Shirauo S is captured, and the salamanders will be calmed down and sequentially supplied to the visitors as live fish.
The reason for installing three or more aquariums is that Shirauo S on the day of capture
This is because the survival rate of is not stable, so that Silauo S, which is in a stable period from the next day, is used. Considering that fishing is not possible due to the weather, at least three days worth of stock is required and it is better to have more than three tanks.

The salamander S bred in this manner can be provided to the customer for a lively eating and drinking. At the time of provision to the customer, for the sake of hygiene, tap water should be boiled once, cooled, and aerated in the same manner as the water in the breeding container 6,
Keep water at the same temperature and salt water concentration in a container provided by the customer. Immediately before providing to customers, live silauo is inserted and provided to customers. Usually, the service time is about 20 minutes, so you can eat and eat the live fish. When the supply time is 20 minutes or more, solid oxygen is put into the supply container or a container with aeration is used.

In addition, using the breeding container 6, the salivation S that had been bred for 2 days or more and entered a stable period had a salt concentration of 0.4.
~ 0.7% salt water, preferably 0.6% salt water at a temperature of 2 ° C to 20 ° C at a temperature almost the same as the temperature of the captured lake water, and a container for transportation having a depth of 30 cm or more 5
Alternatively, by moving to a container for transportation having a larger volume and attaching aeration with an oxygen cylinder or battery-type aeration 50, or by putting solid oxygen into the container 5 and closing the lid, at least about Aomori Tokyo, 24 hours in time. It has become possible to carry a long distance while keeping it alive. For long-distance and long-time transportation, one that has the same water temperature and salt concentration as the breeding water, uses a larger transport container, and has a smaller number of individuals than the breeding container 6 when compared to the volume of water used for breeding. Have a higher survival rate.

[0034]

EFFECTS OF THE INVENTION According to the present invention, since it is possible to capture white salamfish without damaging it to the maximum extent, it is possible to capture with a high survival rate.

Further, since the conventional catching fishing method and the purse sein fishing method can be used without much change, it is possible to greatly increase the catch catch of live sea salam.

Furthermore, since it has become possible to breed and capture the captive salamander for a long period of time, at least for several days,
It is now possible to serve the fast food of white-necked sea lions, which could not be generally eaten in the past, to customers as high-class food at onshore restaurants, restaurants, etc.

It is possible to make this gluttonous salmon roe a local specialty and contribute to the development of tourism.

Further, since the long-distance hauls can be transported while keeping the white-tailed fish alive, it becomes possible to leap up in the long-distance large cities, and the sales channels are expanded, which has a large economic effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a carrying container used in the first and second embodiments of the present invention.

FIG. 3 is a partially enlarged side view explanatory diagram of a second embodiment of the present invention.

FIG. 4 is a partially enlarged plan view of the second embodiment of the present invention.

FIG. 5 is a perspective view of a first container used in the first and second embodiments of the present invention.

FIG. 6 is a plan view of a breeding container used in the breeding method of the present invention.

FIG. 7 is an explanatory view of a purifying device which is also used for the breeding container.

[Fig. 8] Explanatory diagram of boat-towed fishing

[Figure 9] Explanatory drawing of bag net fishing

[Explanation of symbols]

1 capture net (boat towing) 10 Tip opening 11 knot rope 2 ship tug 3 anchor 4 ships 5 Transport containers 50 aeration 51 Aeration motor 52 packing 53 Air Stone 6 Rearing container 60 Purifier 61 Circulation pump 62 strainer 63 discharge elbow 64 Filter member 7 bag net 70 capture nets (bag net fishing) 71 Fence net 72 Opening of the tip of the catch net for sack net fishing 73 Knot rope 74 floating 8 First container S Whitefish SW salt water LW lake water

Claims (3)

(57) [Claims] 1. In the tow fishing, before moving a fishing net containing fish such as whitefish, etc. onto the boat, the fish such as whitefish is transferred into the first container having no corners on the inner surface lowered onto the lake surface. After pulling the container up onto the ship, salt water with a salinity of 0.4-0.7% is brought to a depth of 2 at about the same temperature as the temperature of the lake water to be captured.
A container with aeration that is 5 cm or more and has no corners on the inner surface is filled with silauo only 80 times the water surface area.
A method for catching white-necked salamanders, characterized by transporting the transport container to a breeding facility on land and placing it in the breeding container after the amount is within the range of%. 2. In purse seine fishing, before raising the sachet net containing fish such as whitefish, on the boat, unravel the rope that connects the tip of the catch net of the sagittal net, and hang the corners on the inner surface lowered onto the lake surface. After moving fish such as salamander into the first container without water and pulling the first container onto the ship, the depth of salt water with a salt concentration of 0.4-0.7% is almost the same as the temperature of the lake water to be captured. 25c
A container with aeration that has aeration of more than m and has no corners on the inner surface, put only the salamander within 80% of the water surface area, and then transport the container to a breeding facility on the land. A method for catching white-tailed salamanders, which is characterized in that 3. In purse seine fishing, before raising the sachet net containing fish such as whitefish, etc. onto the ship, unravel the rope that connects the end portion of the catch net of the sachet net and bring the fish from the open net to near the water surface. It is placed and thrown into the enclosure where the water surface is open, and the fish such as salamander that entered the enclosure is placed in the first container with no corners on the inner surface, and only the salam from the first container,
Almost the same as the temperature of the lake water to be captured, the salinity is 0.4-0.
Put 7% salt water at a depth of 25 cm or more in a transport container with aeration and no corners on the inner surface within 80% of the water surface area, and immediately transport it to a breeding facility on the land and use it as a breeding container. A method for catching white-tailed salamanders characterized by including.