RU192297U1 - GAMMARUS TRAP - Google Patents

Abstract

The utility model relates to fisheries and can be used for industrial fishing of amphipod crustacean - gammarus, called mormys and used in many aquaculture industries. The technical result of the claimed utility model is to increase the productivity of gammarus fishing and facilitate the mining process, providing the possibility of mechanization. When using the inventive device, not only crustaceans, but also other large invertebrates, limited by the mesh size, are caught. The gammarus trap consists of a light frame 1, along the perimeter of which a net 2 is attached to the lower part. A brush 4 is installed on the rear wall 3 of the frame 1 in the upper part facing the ice, 4. On the transverse walls 5, 6 of frame 1 on the upper, facing floats are installed to the ice, side 7. Lugs 8 are installed from the outer ends of the transverse walls 5, 6 of the frame 1, at least one lug 10 is also installed on the end of the front wall 9 of the frame 1, and the frame 1 opposite this lug 10 is reinforced with a cross member 11 connecting front 9 and rear 3 walls of the frame. Frame 1 can be made of wood or any other material, and must be floating.

Description

The utility model relates to fisheries and can be used for industrial fishing of amphipod crustacean - gammarus, called mormys and used in many aquaculture industries.

The small crustacean (Gammarus lacustris) belongs to the order Amphipoda. A very plastic freshwater species that lives in both flowing and non-flowing ponds of the temperate strip. Various environmental forms withstand a mineralization gradient from 0.05 to 18 g / l. Depending on the time of year and environmental conditions, it leads both a pelagic and a benthic lifestyle. The main biotope is macrophyte thickets (mainly species with finely divided leaves) and shallow littoral with silty sediments. Lives within the temperature range of 0-25 ° C. In winter, when most water bodies are covered with ice, due to a lack of oxygen, gammarus rises from the bottom up and clings to the inner, underwater surface of the ice. It is for production in winter conditions that the inventive trap for catching gammarus has been created.

A known method of fishing for bloodworms described in the patent for the invention of the Russian Federation No. 2045901, published on 10/20/1995, the Essence of the invention lies in the fact that at the bottom of the reservoir in the sludge layer immersed frame with parallel strings, the strings are installed in horizontal planes placed at different heights . This frame is moved manually or by boat in a direction transverse to the strings. In the process of moving the frame and the interaction of the string with the crank, it wraps around the string that touched it; after lifting the frame to the surface, the bloodworm is shaken off into the storage tank. Common with the claimed utility model is the presence of a framework.

The disadvantage of this method is its focus on fishing for bloodworms - another representative of aquaculture, the method is based on structural features of the bloodworms and cannot be used to catch gammarus.

A chironomid trap is known, described in the utility model patent of the Russian Federation No. 178221, published March 28, 2018. The chironomid trap consists of a bracket with two frames installed, the planes of the frames are located one after another and can be parallel. On each frame there are horizontally rows of lines, and a number of lines on one frame is located with an offset relative to a number of lines on another frame, in a checkerboard pattern. A pole 6 or a cable (rope, cord, etc.) with a nipple for towing on a boat can be attached to the bracket on the side opposite from the frames. Common with the claimed utility model is the presence of a framework.

The disadvantage of this method is its focus on fishing for bloodworms - another representative of aquaculture, the method is based on structural features of the bloodworms and cannot be used to catch gammarus.

A known method of catching mormysh (gammarus) on bunches of hay or grass, described on the Internet https://makchen.ru/mormysh-i-ego-lovlya.html. Bunches of grass or hay are collected, they are tied with a rope on both sides. Inside the bunches, food waste is laid, as a weighting agent, it places a stone. Beams for a long time, at night, are placed at the bottom, in the winter directly into the hole, and then periodically checked. Having untied one end of the beam, the gammarus are shaken out onto the prepared tissue, and the trap is again sent to the bottom.

The disadvantage of this method is the low productivity.

Known trap for catching Mormysh in the winter, "Combine", taken as a prototype and described on the Internet https://makchen.ru/kak-sdelat-kombajn-dlya-lovli-mormysha-v-zimnee-vremya.html. The trap consists of a receiver box and 2-3 rotary levers pivotally connected to each other. The receiver box consists of a wooden frame and mesh at the bottom.

The disadvantage of this method is the low productivity and complexity of the fishing process.

The objective of the utility model is to create a device for industrial fishing of gammarus under ice in the winter.

The technical result of the claimed utility model is to increase the productivity of gammarus fishing and facilitate the mining process, providing the possibility of mechanization. When using the inventive device, not only crustaceans, but also other large invertebrates, limited by the mesh size, are caught.

The gammarus trap is easy to manufacture, its design can be implemented both in domestic conditions and on standard equipment of an industrial enterprise.

The inventive utility model is illustrated by figures, which depict:

FIG. 1 - Isometric view of a trap for catching gammarus;

FIG. 2 - Trap for catching gammarus, top view;

FIG. 3 - Assembly diagram of traps for catching gammarus in a chain.

The gammarus trap consists of a light frame 1, along the perimeter of which a net 2 is attached to the lower part. A brush 4 is installed on the rear wall 3 of the frame 1 in the upper part facing the ice, 4. On the transverse walls 5, 6 of frame 1 on the upper, facing floats are installed to the ice, side 7. Lugs 8 are installed from the outer ends of the transverse walls 5, 6 of the frame 1, at least one lug 10 is also installed on the end of the front wall 9 of the frame 1, and the frame 1 opposite this lug 10 is reinforced with a cross member 11 connecting front 9 and rear 3 walls of the frame. Frame 1 can be made of wood or any other material, and must be floating.

The operation of the device is as follows. The gammarus fishing trap in the general case is a chain link for gammarus fishing; it can be used either alone or in an assembly of several pieces. Depending on the area of the reservoir, the power of the dragging means, the corresponding number of traps for catching gammarus is set. A single chain is assembled from the required number of traps for gammarus fishing, for this, two adjacent traps are made up of transverse stacks 5, 6, the holes of the eyes 8 are combined and the connecting axis is inserted into the eyes, thus the required number of links is sequentially recruited. Next, through the eyes 10 on the front wall 9 of the frame 1, a cable or cord is stretched. This arrangement of traps allows each frame to move freely. The drilled lanes immerse the necessary number of traps fastened together to catch gammarus. Using a cord threaded through the eyes of 10 frames 1, the trap moves under the ice using a winch, ground equipment, hand traction and other means. Since the entire structure is lighter than water, it is pressed against the bottom surface of the ice under water. Between the front part 9 of the frame 1 and the ice, a gap is formed due to the height of the floats 7, which allows not to touch the gammarus individuals that have risen to the ice. A row of a brush 4 is attached to the upper part of the frame, which allows, during the movement, to rake the gammarus from under the ice into a bag of mesh 2 attached to the lower part of the frame.

According to the results of pulling the structure under the ice, traps are pulled out from under the ice and the gammarus trapped in the trap are removed from it.

Claims (3)

1. Gammarus trap, consisting of a frame with a net fixed on it, characterized in that a brush is attached to the upper part of the rear wall of the frame, eyelets for hinged assembly are installed on the lateral transverse walls, and an additional eyelet is installed on the front wall for pulling devices. 2. Trap for catching gammarus according to claim 1, characterized in that floats are installed in the upper part of the lateral transverse walls. 3. Trap for catching gammarus according to claim 1, characterized in that the frame is reinforced with a cross member connecting the front and rear walls of the frame.

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