Anadromous fish pass channel for Gymnocypris przewalskii

Abstract

The invention belongs to the technical field of recovering and protecting Gymnocypris przewalskii ecological resource, in particular relating to an anadromous fish pass channel for Gymnocypris przewalskii. The fish pass channel is characterized by being constructed by a plurality of metal boxes, the lower part of each metal box is provided with a support, a fishway dummy plate is arranged in each metal box, the ratio of the total length of the fish pass channel to the vertical height from the lower channel water face to the upper channel water face is 10:0.5-1.5, the highest point of the fishway dummy plate is 8-15cm lower than that of the metal box, and the lowest point of the fishway dummy plate is 35-45cm lower than that of the metal box. The channel does not change the natural spawning habit of Gymnocypris, which seems that a stair way is built for freely and easily going to rivers and lakes, thereby greatly reducing the physical consumption and dead number of Gymnocypris, greatly increasing the spawning amount and small fish reproductive output of Gymnocypris, and having significant economical and environmental benefits.

Description

1. Technical field: [0001] The invention belongs to the technical field of restoration and protection of ecological resources of naked carp in Qinghai Lake, and in particular relates to a passageway for naked carp in Qinghai Lake to go upriver to spawn and pass fish. 2. Background technology: [0002] Qinghai Lake is the largest inland saltwater lake in my country. The naked carp in Qinghai Lake is the only aquatic economic fish in Qinghai Lake. It is at the core of the "coexistence of fish and birds" ecosystem in Qinghai Lake. Since the 1970s, the climate in the lake area has been dry and warming, the water volume in the river has dropped sharply, overfishing, and the spawning grounds have dried up, which has seriously reduced the resources of naked carp and seriously affected the virtuous cycle of the social, economic and ecological environment in the lake area. To this end, our province has adopted scientific research methods such as sealing the lake for fish breeding, ar...

AI Technical Summary

Problems solved by technology

As the habit of the naked carp is to go upstream in the lake to lay eggs and reproduce offspring, and the amount of river water flowing into the lake has decreased in recent years, so that the naked carp cannot go back to the river to lay eggs, and some cannot migrate to the lake after laying eggs and die. Even if the amount of water is sufficient, most fish cannot effectively complete the upstream spawning due to the embankment and interception

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