Efficient and environment-friendly light-induced precise trapping device for seasonal old crabs

Abstract

The invention discloses an efficient and environment-friendly light-induced precise trapping device for seasonal old crabs. The tapping device comprises N pentagonal catching net rooms, fixed net feet and inducing light sources, the multiple pentagonal catching net rooms are sequentially connected to form a row catching net room, a tail net bag is arranged at the tail end of the row catching net room, the fixed net feet are arranged at the lower end of the row catching net room, each inducing light source is arranged in each pentagonal catching net room, one-way trapping windows are formed in the roof and the wall face of each pentagonal catching net room, and cement block type fixing net feet are arranged at the bottom of each pentagonal catching net room. The transparent one-way trapping windows can tap the seasonal old crabs into the net comprehensively, the seasonal old crabs can be trapped accurately and efficiently, the fixed lead net feet are improved, cement blocks are used for replacing lead blocks, the cement blocks and net ropes are prevented from moving and being engaged by additionally arranging engaging rods, pollution of the metal lead blocks to water is eliminated, and the comprehensive economic benefits of farmers are improved.

Description

Technical field: [0001] The invention relates to a tool for catching shrimps and river crabs, in particular to a special fishing device for shrimps and crabs in which fish, shrimps and river crabs are mixed in shallow waters such as lakes and river ponds. Background technique: [0002] Now more and more aquaculture farmers are carrying out the interbreeding of shrimps, crabs and fishes. Green shrimps, crayfishes, snakeheads, silver carp, mandarin fish and other products can be mixed with river crabs to further improve water quality. The resource utilization rate increases the farmers' income per unit pond area. However, how to prevent the mutual harm between various aquatic products in the nesting process is the key technology. In this kind of polyculture pond, during the fish breeding period, there are old crabs left over from season to season in the water body, and their shells are hard. And sharp, their hard shells are not only easy to cause damage to fish eggs and larva...

AI Technical Summary

Problems solved by technology

The existing ground cages are all quadrilateral folding ground cages. On one side of each section of the ground cage, there is a tail net type entrance with a large outside and a small inside. Lead net feet are tied at the bottom of the ground cage so that the ground cage can Sink to ensure that the ground cage and the bottom of the water touch the bottom stably, preventing the waves of the water body in windy weather from pushing the cage to move and affecting the fishing effect of the cage

The fishing efficiency of the existing fishing ground cages is not high, and the accuracy is too poor, and the old crabs cannot be caught and removed thoroughly every other season. Other fish in this kind of ground cages are also easy to enter the net and be caught at the same time. At the same time, the existing ground cages The lead mesh foot not only requires a lot of work, time-consuming and laborious to wear, but also consumes a lot of metal lead. Metal lead is a heavy metal that is harmful to the human body and aquatic products. The use of lead mesh feet will cause excessive heavy metals in the water, and even Affect the quality of aquatic products such as fish, shrimp and river crabs in polyculture ponds. Now farmers urgently need an efficient, accurate and environmentally friendly trapping device for old crabs every other season.

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