Anguilla japonica fry fishing device and using method

Abstract

The invention provides an anguilla japonica fry fishing device. The anguilla japonica fry fishing device comprises fixed piles and collecting net arranged among the fixed piles, the front net opening of the collecting net is big, the rear net opening of the collecting net is small, the collecting wire is in a conical cylinder shape, the lower ends of the fixed piles are vertically arranged in mud of an anguilla japonica fishing point in an inserted mode, the front net opening of the collecting net is provided with a thick nylon rope circle to set the shape of the front net opening, the upper end of the fixed pile is connected with the thick nylon rope circle, and the rear net opening of the collecting net is provided with a tightening rope used for timely closing up the rear net opening; the collecting net comprises three sections of net bodies with different mesh sizes connected in sequence, and in addition, the collecting net is further connected with a floating apparatus. According to a using method of the anguilla japonica fry fishing device, the problem is solved that due to the adoption of a uniform size, the wild anguilla japonica fry resources are badly destroyed; meanwhile, the mortality and the physical labor intensity of fishermen in the anguilla japonica fry collecting process are lowered; the anguilla japonica fry fishing device is simple in structure and low in cost, and can be applied to different fishing positions.

Description

technical field [0001] The invention belongs to the technical field of fishery, in particular to a Japanese eel seedling fishing device. Background technique [0002] Japanese eel has delicious meat and high nutritional value. Known as "ginseng in water", it has become a worldwide farmed fish. However, because its artificial reproduction technology has not yet been solved, the individual breeding still needs to catch wild seedlings. In the estuary area where Japanese eel seedlings migrate upstream every year, coastal fishermen from all over my country line up "predatory" fishing methods. Due to the operation mode, the number of eel fry entering the inland river is getting smaller and smaller. If things go on like this, it will be difficult to restore the Japanese eel resources. [0003] Japanese eel seedlings are slender and their body diameter generally does not exceed 2mm. Fishermen mostly use denser mesh nets to catch the seedlings to the maximum extent, thus causing gre...

AI Technical Summary

Problems solved by technology

However, because its artificial reproduction technology has not yet been solved, the individual breeding still needs to catch wild seedlings. In the estuary area where Japanese eel seedlings migrate upstream every year, coastal fishermen from all over my country line up "predatory" fishing methods. The operation mode makes the number of eel fry entering the inland river less and less

If things go on like this, it will be hard to recover the Japanese eel resources

[0003] Japanese eel seedlings are slender and their body diameter generally does not exceed 2mm. Most fishermen use denser mesh nets to catch the seedlings to the maximum extent, thus causing great harm to wild fishery resources.

Since the current fishing still relies on traditional manual labor operations, and most of the seedling catchers are old fishermen, the mesh is dense, the water is slow, and the operation is also very laborious.

At the same time, due to the dense mesh, impurities are not easy to filter out, so that a lot of algae and jellyfish are mixed in the eel fry. When collecting, the water body is very viscous, the dissolved oxygen decreases, and the eel fry are easy to die.

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