JPH0260Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention utilizes the difference in swimming ability of bottom-dwelling fish.
This invention relates to a trawl net for selectively catching bottom-dwelling fish such as flounder and flounder, which is capable of selectively catching only bottom-dwelling fish with poor swimming ability.

<Prior art> In recent years, catch restrictions have been put in place for certain fish species in bottom trawling and trawl fisheries within 200 nautical miles of foreign countries. be. However,
It was common, and virtually unavoidable, for fish that were prohibited from fishing to end up in trawl nets during fishing operations.

<Problems to be solved by the invention> This is because the entire net of the conventional trawl net is formed into a bag shape, and there are no obstacles inside the net.

By the way, it has already been revealed that bottom-dwelling fish such as flounder and flounder generally have poor swimming ability.

<Means for Solving the Problems> Therefore, the present invention is to provide a partition net inside the fish body portion of the trawl net main body, which partitions the net almost perpendicularly to the seine direction of the trawl net, and to The lower part is a small mesh mesh, and the upper part of the partition mesh and the front part of the baiting of the fish mesh to which this partition mesh is connected are formed with a super large mesh mesh with a mesh size of approximately 1000 mm or more. Even if a rich variety of fish were to enter the trawl net at the same time, they would be allowed to escape from the net through the extra-large net of the baiting.
This allows selective fishing of only fish species with poor swimming ability.

<Example> Next, an example of a trawl net for selective fishing of bottom-dwelling fish such as flounder and flounder according to this invention will be described based on the drawings. This is a trawl net having a shape, and numeral 5 is a partition net disposed inside the body of the body net 3 of this trawl net 1 so as to partition the trawl net 1 in the seine direction. The partitioning net 5 is knitted with a small mesh 6 on the lower side and a super large mesh 7 on the upper side. Here, the super-large mesh 7 is the same as that commonly used, and generally has a mesh size of 1000 mm or more. 8 is the bating of the net 3, but this bating 8
Even in this case, the front part of the connected part of the partition net 5 is formed with a super-large mesh 9.

<Function> However, when fishing in this manner, various fish species enter the net from the net opening. Generally speaking, when observing the state of fishing, it is found that at first the trawl net is used to chase the school of fish, and this seine force overcomes the progress of the school of fish and encircles the school of fish with the trawl net. Then, these schools of fish will eventually be guided in the direction of the closed end 4, but in this invention, since the partition net 5 is provided as described above, they will be guided directly in the direction of the closed end 4. Not to be guided. Normally, they try to escape upward along this dividing net 5, but among the fish that enter the net here, bottom-dwelling fish such as flounder and flounder, which have poor swimming ability, may not completely reach bating 8. Without being able to do so, it moves into the inner part of the trawl net 1 from the super-large mesh portion 7 of the partition net 5.
On the other hand, a school of fish with good swimming ability can advance further upwards along the partition net 5 and escape from the super-large mesh 9 portion of the batting 8 to the outside of the net. Therefore, in this invention, although the partition net 5 could theoretically be made of one piece, the reason why it is made up of multiple pieces as shown in the figure is because no matter how strong the swimming ability of the fish is, This is because the super-large mesh 7 of the first stage partition mesh 5 may move to the next door, and even if it reaches this point, it should be allowed to escape to the outside.

<Effects of the invention> As described above, according to the trawl net for selective fishing of bottom-dwelling fish such as flounder and flounder according to this invention, there is a trawl net inside the main body of the body net of the trawl net, approximately perpendicular to the trawl direction of the trawl net. In addition to installing a partition net, the lower part of this partition net is a small mesh net, and the upper part of the partition net and the front part of the batting of the body net to which this partition net is connected are provided with a mesh of approximately 1000 mm or more. Since it is made of super-large mesh with a
This has the effect of allowing selection of catches based on differences in swimming ability.

[Brief explanation of drawings]

The drawing is a side view showing an embodiment of the trawl net for selectively catching benthic fish such as flounder and flounder according to the invention. 1... Trawl net, 2... Sode net, 3... Body net,
4...Tangled end, 5...Dividing mesh, 6...Small mesh of partitioning mesh, 7...Super large mesh of partitioning mesh, 8...Beching, 9...Super large mesh of bating.

Claims (1)

[Scope of utility model registration request] Inside the body of the body of the trawl net, there is provided a partition net that partitions the trawl net at almost right angles to the seine direction of the trawl net, and below the partition net is a small mesh net, and above the partition net and between the partition nets. A trawl net for selective fishing of benthic fish such as flounder and flounder, characterized in that the front part of the baiting of the body net to which the nets are connected is formed with a super-large mesh net having a mesh size of approximately 1000 mm or more.