Device and method for recovering and rebuilding spawning sites of fishes in natural waters

Abstract

The invention relates to a device and a method for recovering and rebuilding spawning sites of fishes in natural waters. The device comprises a box body frame, float bowls, brackets, fixing rings and fish egg attachment matrixes, wherein the box body frame is a cuboid or cube structure, and two edges, which are parallel to each other, on the upper surface of the box body frame are sleeved by one float bowl respectively; the upper surface and the lower surface of the box body frame are fixedly provided with a plurality of brackets, and the brackets are sleeved by a plurality of fixing rings; the fixing rings are connected with the fish egg attachment matrixes; four top corners of the upper surface of the box body frame are connected with an anchor rope respectively; and the device is fixed in waters where the spawning sites of fishes require to be recovered and rebuilt by a bamboo anchor. By the device and the method provided by the invention, a spawning shelter and the fish egg attachment matrixes are provided for fishes, and simultaneously the fish egg attachment matrixes also provide habitats for various bait organism communities, so that the density of bait organisms is improved, the bait supply for fish larvae is guaranteed, the aim of recovering and rebuilding spawning sites of fishes is achieved, and the manual-work spawning sites of fishes formed by the device and the method can automatically rise or drop along with the change of the water level.

Description

technical field [0001] The invention belongs to the technical field of fish spawning, and in particular relates to a device and method for restoring and rebuilding fish spawning grounds in natural waters. Background technique [0002] Fish spawning grounds, as the name implies, refer to the places where fish clusters spawn. The spawning grounds provide the necessary physical, chemical (such as shelter, fish egg attachment substrate, etc.) The bait organisms required by fish), fish spawning grounds play an irreplaceable role in the reproduction and continuation of fish populations. However, in recent years, due to human activities, climate change, engineering construction and other reasons, fish spawning grounds in natural waters around the world have been severely damaged, especially the destruction of fish spawning substrates in natural waters and the destruction of bait organisms. Abundance decreased. The destruction of fish spawning grounds has led to a homogeneous tren...

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Problems solved by technology

However, methods for restoration and reconstruct...

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