Catching net cage for purse net aquiculture

Abstract

The invention discloses a catching net cage for purse net aquiculture, which is characterized in that the catching net cage comprises a barrel-shaped frame, a classification gate and a netting, wherein the classification grate is arranged on the side of the frame and consists of a plurality of grids in parallel; gaps for fish less than certain body width escaping from the net cage are formed among the grids; the netting comprises a first netting, a second netting and a third netting; the first netting and the second netting are arranged at the top and bottom of the frame; and the third netting is arranged on the side face of the frame by an opening-closing mechanism in an opening and closing manner. Compared with the prior art, the net cage has the advantages that the net cage adopts an opening-closing device to catch large fish and release small fish according to the relation between the weight and body width of the fish and the fish evading behavior, and the fish can be classified while the catching is finished.

Description

technical field [0001] The invention relates to a fishing net box, which can be used for fishing in purse seine culture. Background technique [0002] The existing seine fishing process is as follows: First, increase the impact around the seine to a certain extent to drive the fish away from the edge of the seine; then turn off the engine of the boat, put in fresh bait that fish like to eat, and lure the fish Go to the designated catch position, at the same time, gently lower the net along the net wall, wait for most fish to be attracted to the designated position, slowly drag the net to the designated position, so that the fish will be surrounded At the designated catch position, then use the dip net to catch on board. Classification of fish after harvest. The fish is graded by using the seine catch grading system on the ship. The machine grading is to slide the fish to be graded through a funnel to a slanted grading system where the distance between adjacent grids gradua...

AI Technical Summary

Problems solved by technology

However, the above process is obviously complicated and difficult to operate. In addition, the pulling of the net during the fishing process is likely to cause damage to the fish, which affects the quality of the catch, and the fish that have not reached the fishing standard leave the water prematurely, which affects further cultivation.

Images