Fish and shrimp separation device of shrimp trawl net

Abstract

The invention discloses a fish and shrimp separation device of a shrimp trawl net, and aims at providing the fish and shrimp separation device of the shrimp trawl net capable of being used for automatically separating fish and shrimps in the shrimp trawl net so as to effectively solve the problems of an existing shrimp catching trawl net that fishermen need to take a great effort to separate fishand shrimps when dealing with fishing catches, and the existing shrimp trawl net is easy to cause great damage and death to the fish. The fish and shrimp separation device of the shrimp trawl net comprises a bottom trawl net and a fish and shrimp separation selection device, wherein the bottom trawl net comprises a main net bag and a target net bag used for catching shrimps; the target net bag ispositioned above the main net bag; the tail part of the main net bag is provided with a tail part opening, so that fish entering the main net bag can flow back into the sea through the tail part opening; and the fish and shrimp separation selection device comprises a support framework connected with the tail part of the bottom trawl net into a whole, a shaft rod rotatably arranged on the support framework, support rollers arranged on the shaft rod and used for supporting the support framework, and a fish and shrimp separation barrier layer arranged on the support framework and positioned in the main net bag.

Description

technical field [0001] The invention relates to the field of bottom trawl nets, in particular to a fish and shrimp separation device for trawl nets. Background technique [0002] Important features of the shrimp trawl fishery are the diversity of catch composition, which is mostly fish and shrimp, and the high discard rate. The bycatch and discarding of shrimp fishery will affect the amount of resources of target species and non-target species, as well as the population structure and cluster changes in the sea area. Such as fish, causing a lot of damage, and even lead to the death of a large number of fish. In view of this, it is of great significance to further study and improve this type of shrimp trawl gear to protect economic fish and shrimp resources. Contents of the invention [0003] The purpose of the present invention is to provide a method that can automatically separate the fish and shrimp in the trawl net, thereby effectively solving the problem that the curr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method that can automatically separate the fish and shrimp in the trawl net, thereby effectively solving the problem that the current shrimp trawl exists. Fishermen need to spend a lot of energy to separate fish and shrimp when handling fish catches, and it is easy to cause a lot of damage to the fish. The problem of injury and death in shrimp trawl nets for fish and shrimp separators

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