SU1083997A1 - Trawl for catching shripms - Google Patents

Abstract

1.-TRAIL FOR FISHING SHAWN, containing net bag, equipped with bottom pick, top pick, located in front of the bottom, tow cables, mutnik, means for changing the vertical opening and the distance between the mutnik and bottom pick, containing flexible elements, characterized in that , in order to increase fishing efficiency by increasing the fishing zone, the net bag is equipped with net scarves, the bases of which are fixed in the middle of the upper and lower parts of the net bag, and the kerchief tops are provided with additional towing cables. 2. A trawl according to claim 1, characterized by and with the fact that each pickup is made of two parts, having ends for mounting the towing wheel (Handle cables, and means for changing the vertical opening are connected to additional towing cables. 00 co. with fpvi.

Description

This invention relates to industrial fisheries and may not be used in shrimp trawling. The famous trawl for fishing shrimp is a net bag consisting of two wings, a motni, a public garden, a kutka, equipped with three boards, cables, upper and lower rebounds, mutators, lifting knuckles 1}. However, in the well-known trawl, the obi zone is undervalued, necessitating the sharing of several traps. A well-known trawl for catching shrimp with an attached bag is about the bottom pick, top pick, located in front of the bottom, towing cables, mutnik, means to change the vertical opening and the distance between the mutnik and bottom pick, containing flexible elements (2, However, this trawl is characterized by insufficient fishing efficiency caused by a limited catch zone. The purpose of the invention is to increase the catch efficiency by increasing the catch zone. I The goal is achieved by the fact that in the trawl A shrimp bag containing a net bag equipped with a lower pick, an upper pick located in front of the bottom, towing cables, a mutnik, means for changing the vertical opening and the distance between the pick and the bottom pick, containing flexible elements, the net bag is equipped with net scarves, the bases of which secured in the middle of the top and bottom of the net bag, and the tops of the kerchiefs are equipped with additional towing cables. Moreover, each selection is made of two parts, having ends for mounting the towing cables, and means for changing the vertical opening of the connection to the towing cables. FIG. 1 shows a trawl for fishing shrimp, a general view, in FIG. 2, a scheme for towing two shrimp trawls; in fig. 3 shows the structure of the third pair of wings of the trawl and their connection to the cables; in fig. Figure 4 shows the pattern of moving the mutnik, bottom 7 picks, and, the trawl square for the height of the jumping shrimp, in FIG. 6. shrimp harvest zone with three-winged trawl. A trawl for fishing shrimp contains a net bag having a motile part 1, a knot 2, a left wing 3, a right wing 4, a net scarves upper 5 and lower 6, upper picking 7 located in front of the lower rebounds 8, mutnik 9, expansion trawl boards 10, the tail end (lin) 11 and towing cables, end cables 12, weer 13 and additional towing cables 14. With double trawling (Fig. 2), wera 13 is connected to the shots 15 of the fishing vessel 16, and the ladders are connected to one another with the connecting line 17 through the pull ends 11. Top scarves 5 and prepared from the product of the same assortment that the motenna part 1 of the trawl (figure 3) "Base - edge 18 net scarf 5 is sewn to the square 19 of the trawl with the formation of overlap over the bottom net scarf 6. The upper and lower rebounds 7 and 8 are made of two separate parts each. The edges 20 of the upper and lower net kerchiefs 5 and 6 are mounted respectively on the left and right parts of the upper and lower picks 7 and 8, on the inner ends of which there are ogons 21, which are connected with additional towing cables 14 by brackets 22. The lower net scarf 6 is made similarly to the upper 5 and sewn to the bottom plate of the trawl. Lower selection 8 and mutnik 9 are connected to each other by jumper 23, which is a means for changing the distance between them along the line of additional towing cables 14. Jumper 23 is made sectional with the possibility of adjusting its length depending on the trawling speed. Net scarves 5 and 6 increase the horse-drawn part of the trawl, i.e. horizontal opening of the trawl. Means for changing the horizontal and vertical opening of the trawl by. changes in the lengths of the cables 14 are removable bridles mounted on them 24. The distance over the bridge 23 between the mutnik 9 and the lower selection 8 defines the zone of fishing 25 (figure 5). The scheme of the optimal mutual arrangement of the mutnik 9, the lower rebounds 8 and the square 19 at a given trawl speed is shown in FIG. 4. When the mutnik 9 moves along the ground, the shrimp is scared and jumps away from the irritant. Studies show that most often shrimp jumps are performed in a vertical plane, less often - fanlikely from an irritant. The shrimp (Fig. 4), frightened by the mutator 9, makes a leap in the direction of the square 19, having reached and having frightened him, the shrimp jumps in the opposite side. The movement of the shrimp in FIG. 4 is indicated by arrows. If at this time the bottom fitting 8 with the bottom trawl plate does not move to the position indicated in FIG. 4 dotted, the shrimp falls between selection 8 and the mutnik 9, buries itself in the silt and the trawl passes over it, i.e. there will be no catch. If selection 8 with the bottom plate of the net bag of the trawl is moved to the position indicated in FIG. 4 by a dotted line, then the shrimp, having hit the mat on the bottom plate of the trawl bag, jumps again to Square 19 and so will jump to the bottom of the 2 ladders. At a small distance from the fittings 8 to the mutnik 9, the shrimp, jumping, falls immediately under the bottom selection 8 and the bottom plate of the trawl and is not caught. Therefore, the optimality of the distance along the web 23 between the lower selection 8 and the mutnik 9 at a given trawling speed is decisive. This also determines the area of catch 25 of the trawl, which is less than its horizontal opening (figure 5); To increase the horizontal opening, additional towing cables 14 are tightened, to increase the vertical opening, additional towing cables 14 are released using removable bridles 24. The lifting of the trawls is carried out during the course of the vessel against the current in order to avoid leaching of the shrimp from fishing gear. When the trawl starts to lift, the vessel slows down and selects the warp 13, extreme cables and cables 14 until the boards 10 approach the blocks at the shots 15. Connecting line 17 is picked up by a cat, the pull ends 11 for hitting the cuts 2 trawls are disconnected and the cuts 2 pod worn to the sides of the ship and lifted on board. The proposed trawl provides increased fishing efficiency by increasing the catch zone.

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Claims (2)

1. TRAL for fishing for shrimp, containing a net bag, equipped with roving ropes, a roving device, means for changing the vertical opening and distance between the rover and the lower selection, containing flexible elements, characterized in that, in order to increase the efficiency of fishing by increasing the fishing area, net the bag is equipped with net scarves, the bases of which are fixed in the middle of the upper and lower parts of the net bag, and the tops of the scarves are equipped with additional towing cables. 2. The trawl according to claim 1, characterized in that each selection is made of two parts that have ends at their ends for securing towing cables, and means for changing the vertical opening of the 00 stock stock