Testing device for judging influence of different water depths on fish farming

Abstract

The invention provides a testing device for judging influence of different water depths on fish farming. The device comprises a combined framework (1), a mesh box (2), a connector (3), a bearing base (4), a rotating shaft (5) and a sleeve (6), wherein the combined framework (1) is composed of at least two rectangular frameworks, and every rectangular framework is mutually and vertically overlapped and connected into one; the mesh box (2) is matched with every framework and fixed at inside of the framework through a network wire; the connector (3) is fixedly connected to the upper end part of the combined framework (1), and the top end thereof is connected to the sleeve (6) and formed into an integrated structure with it; one end of the rotating shaft (5) crosses through the sleeve (6) and the fixing piece fixes both ends or one end of the sleeve thereon to form a dynamic fit; the other side is sleeved to the bearing base (4). The device is simple in structure, convenient to operate, low in cost, and flexible in use; moreover, the testing device has direct guiding significance for the best water depth of the fish farming within the given water domain scale under the natural condition.

Description

technical field [0001] The invention belongs to the technical field of aquaculture experimental devices, and in particular relates to an experimental device for judging the influence of different water depths on fish farming. Background technique [0002] The discharge of high dams will lead to supersaturation of total dissolved gas (TDG) in the downstream water body, and as more and more high dams are built, such problems will become more and more prominent, resulting in serious damage to the aquatic ecosystem of the river, If the water body is oversaturated with TDG, the fish will suffer from air bubble disease. This disease will not only make the fish have difficulty breathing, exophthalmos, and anemia, but also make the fish float on the water surface and cannot control the environmental water depth they need. class death. However, with the increase of water depth, the water body is more sensitive to gases such as O 2 , N 2 and CO 2 As the dissolving capacity of gas ...

AI Technical Summary

Problems solved by technology

But after all, this device uses circulating water to carry out simulation experiments indoors. On the one hand, because it cannot be tested in the wild such as rivers and lakes, it is not related to the actual conditions of rivers and lakes in the wild, such as water flow velocity, TDG saturation in water, and water quality. Undoubtedly, there is a gap in natural conditions, so it cannot truly reflect the impact of total dissolved gas supersaturation on fish. The conditions and scope of use have certain limitations, and it is of little significance for judging the optimal water depth for fish farming.

On the other hand, the structure of the device is relatively complex, the investment is large, and the energy consumption in the use process will bring corresponding cost problems

Images