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Building method of spawning site suitable for fish laying demersal eggs in torrent

A technology for spawning grounds and fishes, which is applied in the field of construction of spawning grounds for fish with viscous and sedimentary eggs, can solve problems such as the destruction of fish spawning grounds, and achieves convenient construction, sustainable utilization of maintenance, and mitigation of damage. Effect

Active Publication Date: 2021-01-01
WATER ENG ECOLOGICAL INST CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Based on the above-mentioned prior art, the present invention provides a construction method suitable for the spawning grounds of fishes that produce viscous eggs in torrents. The method is simple and solves activities such as dredging, dredging, dams, revetments, and hardening of rivers. The homogenization of river habitats and the destruction of fish spawning grounds caused by environmental pollution have restored the ecological functions of river and lake reservoirs

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  • Building method of spawning site suitable for fish laying demersal eggs in torrent

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Embodiment 1

[0039] This example takes the yellow-tailed pomfret as an example. The yellow-tailed pomfret is an important fish population in a certain drinking water source reservoir. It plays a certain role in improving the water quality of the reservoir. The existing spawning ground is located in a densely populated area upstream of a tributary. During the fish spawning season, local villagers wantonly catch broodstock of yellow-tailed pomfret that spawned upstream. Due to the construction of the river channel, the scale of the original spawning ground has gradually shrunk, resulting in The population of this fish is shrinking every year. Therefore, it is necessary to artificially build the spawning ground of the yellow-tailed pomfret within the river section of the reservoir protection area, so as to facilitate the management of the protected area and protect the resources of the yellow-tailed pomfret. The artificial construction method of the spawning ground of the yellow-tailed pomfre...

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Abstract

The invention discloses a building method of a spawning site suitable for fish laying demersal eggs in a torrent. The building method includes the steps of S1, early-stage investigation; S2, spawningsite address selection; S3, flow state adjustment; S4, artificial alluvial flat construction; S5, artificial deep pool construction; S6, artificial sandbank construction; and S7, vegetation recovery.The building method of the spawning site suitable for the fish laying the demersal eggs in the torrent is simple, the problems of river habitat homogenization and fish spawning site damage caused by river sand excavation, desilting, dam, revetment, riverway hardening and other activities are solved, and the ecological functions of rivers, lakes and reservoirs are recovered.

Description

technical field [0001] The invention relates to the technical field of water ecology restoration, in particular to a construction method suitable for spawning grounds of fishes that lay viscous eggs in torrents. Background technique [0002] In the river-lake (reservoir) ecosystem, some fish species that lay sticky eggs that live in still water need to migrate to spawning sites in specific sections of rivers entering the lake (reservoir) to spawn. The period is mostly from April to July. Sexually mature broodstock usually go up to the spawning ground when the flood discharges after the rain. The fertilized eggs adhere to the gravel and stones. Find food and grow in the crevices of gravel. [0003] Under natural conditions, the topographical conditions, bottom quality, flow velocity, flow state, and sediment of different river sections are all important factors that affect fish spawning grounds. Human activities that affect one or more of these factors will cause Let fish s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10C02F3/32
CPCA01K61/10C02F3/32C02F2103/007Y02A40/81
Inventor 郑志伟史方邹曦丁庆秋胡莲杨晴
Owner WATER ENG ECOLOGICAL INST CHINESE ACAD OF SCI
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