Cold water fish multiplication and releasing seedling sheltering device

Abstract

The invention discloses a cold water fish multiplication and releasing seedling sheltering device. The device comprises a bottom plate, loading plates, sheltering reefs, fixed components and tree-shaped tees, wherein the multiple tree-shaped tees are arranged on the surface of the bottom plate; the sheltering reefs sleeve the tops of the tree-shaped tees and are located on the top of the bottom plate; the multiple loading plates are arranged on two sides, located in the center, of the bottom plate; fixed plates are fixed to one ends of the loading plates through screws; threaded holes are formed in one sides of the fixed plates; the insides of the threaded holes is sleeved with threaded rods; nut sleeves sleeve the tops of the threaded rods and are located on the tops of the fixed plates;and baffle plates are welded to the tops of the threaded rods. The cold water fish multiplication and releasing seedling sheltering device is simple in structure and convenient to carry, install, disassemble and assemble; and meanwhile, the area of a shelter can be increased during the valuable and rare cold water fish releasing process, and the predation of water birds and carnivorous fish can beavoided, so that the survival rate of released seedlings can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of proliferation and release of rare cold-water fish, in particular to a nursery protection device for proliferation and release of cold-water fish. Background technique [0002] Most of the rare cold-water fish fry used for artificial breeding and release come from artificial breeding. The standards for the released fry are: first, the total length is 5∽8cm; second, healthy and disease-free; third, healthy, clustered, Lively swimming; fourth, no deformities, fully developed fin rays; fifth, smooth body surface, basically the same specifications, etc. However, after the seedlings are put into the natural water body from the breeding workshop, it is difficult for the seedlings to adapt to the natural conditions in a short time. Clusters in slow water and shallow currents are easy to be predated by water birds or carnivorous fish, which seriously affects the survival rate of released seedlings; in view of thes...

AI Technical Summary

Problems solved by technology

[0002] Most of the rare cold-water fish fry used for artificial breeding and release come from artificial breeding. The standards for the released fry are: first, the total length is 5∽8cm; second, they are healthy and disease-free; third, they are physically strong, clustered, Lively swimming; fourth, no deformities, fully developed fin rays; fifth, smooth body surface, basically the same specifications, etc. However, after the seedlings are put into the natural water body from the breeding workshop, it is difficult for the seedlings to adapt to the natural conditions in a short period of time. Clusters in slow water and shallow currents are easy to be predated by water birds or carnivorous fish, which seriously affects the survival rate of released seedlings; in view of these defects, it is necessary to design a cold-water fish breeding and releasing seedling protection device

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