| 摘要 |
FIELD: industrial fishery. SUBSTANCE: device has selective and guiding members, cylindrical carcass defined by longitudinal and transverse ropes. Selective and guiding members are shaped as truncated conical parts and form insert. Truncated conical parts are connected with their smaller ends to define large fish passage leading into trawl sack. First conical part is defined by selective grids alternating with net inserts. Second conical part is made netted. Insert is fixed within carcass so that larger bases of conical parts are fixed at junction point of carcass and trawl netted web. Trawl has selective buffer belt defined by the system of longitudinal and transverse ropes. Selective grids positioned in alternation with net inserts are attached to the system of ropes. Trawl may be further equipped with selective grids, which may be fastened on trawl netted web between selective buffer belt and device for releasing small-sized objects, such as young fishes. Number of young fish releasing devices may be more than one and devices may be fixed in trawl sack in spaced relation one with respect to the other. EFFECT: increased efficiency, simplified construction and retention of young fishes. 4 cl, 4 dwg |
