Floating type ampullaria gigas egg trapping device changing along with water level

Abstract

The invention relates to a floating type ampullaria gigas egg trapping device changing along with the water level. The floating type ampullaria gigas egg trapping device comprises a trap, a floating ring and a collector. The trapper is in the shape of a cylinder or a regular polygon prism and comprises a shell and a one-way movable door. A plurality of window openings are formed in the periphery of the shell, a pair of door seats are arranged in the middles of the two sides of each window opening, and the one-way movable door is hinged to the door seats through a transverse door shaft in the middle. An annular partition plate used for preventing the lower portion of the one-way movable door from turning inwards is arranged on the periphery of the bottom of the inner side of the one-way movable door. The weight of the lower end of the one-way movable door is larger than that of the upper end, and the one-way movable door is naturally closed under the action of the self weight of the lower end in a natural state; the floating ring is fixedly installed on the lower portion of the trap and used for providing buoyancy. The collector is fixedly mounted at the lower part of the floating ring; the trapper, the floating ring and the collector are communicated in the vertical direction.

Description

technical field [0001] The invention relates to a device for trapping and killing snail eggs, in particular to a floating-type trapping device for snail eggs that can change with the water level. Background technique [0002] Fushou snails, also known as big bottle snails and apple snails, belong to the phylum of molluscs, gastropoda, middle gastropods, bottle snails, and bottle snails. Fushou snails like to live in slow-flowing rivers, damp and ventilated ditches, creeks and paddy fields, etc. They have a mixed diet and a very large appetite. They like to eat fresh and succulent plants, and can even eat very rough plants and scrape stones on stones. algae. Fushou snails mainly harm aquatic crops such as rice, water chestnut, water chestnut, water spinach and gorgon, as well as xerophilic crops such as sweet potatoes near the waters. Rice suffers seriously, up to 64%. Fushou snails have become a major disaster in rice-growing areas in my country. Fushou snail has a very st...

AI Technical Summary

Problems solved by technology

[0005] 1) The trap must be fixed to the shore with a rope, which is only suitable for individual apple snails that lay eggs on the shore, and the structure of the device does not fit the topography of the shore, the impact of wind and waves is also great, and the trapping rate of apple snails is low;

[0006] 2) The trap has no lure effect on apple snails, and the trapping rate is very low;

[0007] 3) This trap is not suitable for water bodies with water level changes. It is greatly affected by hydrological conditions. It cannot be used in tidal river sections, ponds, wetlands, lakes and reservoirs with water level changes, and its application range is limited.

Images