Fish swimming capability measuring method and submerged open-type testing device

Abstract

The invention provides a fish swimming capability measuring method and a submerged open-type measuring device. The method includes 1, making preparation before experiments; 2, testing and correcting systems; 3, testing swimming capabilities of fishes; 4, collecting experiment data; and 5, maintaining and cleaning the systems. A water outlet tube with a water level adjusting device is mounted at the bottom of a water tank of the submerged open-type testing device. A support, an experiment table base, a stabilizing cove and a testing tube are mounted in the water tank. A water current creating system formed by a motor, a water inlet hole and a vane wheel is arranged at one end of the testing tube. The water current creating system and a test area with an inspection window are respectively connected with two ends of a rectifying device. The test area with the inspection window is connected with a flow rate test area. A current meter is mounted in the flow rate test area connected with a water level control area. A water current flow rate monitor, a frequency conversion controller and a water quality monitor are mounted on a control panel. A water inlet tube is mounted at one end of the upper portion of the water tank.

Description

technical field [0001] The invention relates to the field of aquatic science, in particular to a fish swimming ability test method and a submerged open test device. Background technique [0002] Fish swimming ability refers to the duration and intensity of fish swimming. The indicators to measure the swimming ability of fish mainly include sustained swimming speed, critical swimming speed, burst swimming speed and so on. The most commonly used ones are sustained swimming speed and critical swimming speed. The existing fish swimming ability measurement principle is generally under a uniform flow field in a confined space, assuming that the swimming speed of the fish is equal to the water flow speed, and distinguishing according to the swimming state changes of the fish under different flow speeds. Most are self-contained sealed test systems. The creation of water flow velocity is mainly realized by electric motor or hydrostatic pressure (Cao Zhendong et al. 2005, Tu Zhiyin...

AI Technical Summary

Problems solved by technology

[0004] 2. Since the experimental device is a relatively independent sealed ring, as the experiment time continues, the dissolved oxygen level in the water will continue to decrease due to the consumption of experimental fish, which will affect the results of the fish swimming ability test. The usual practice is to pass a period of time Just change the water, the operation is more troublesome

Changes in water temperature will cause deviations in the results of testing fish swimming ability, resulting in increased experimental errors

[0006] 4. Since the experimental device is sealed, the water flow velocity during the operation of the device and during the experiment cannot be directly measured, resulting in non-actual measurement of the water flow velocity value. It is only based on the theoretical calculation results of the recommended working efficiency of the water flow, and there are certain errors. The attenuation error of the working efficiency of the water propeller will increase significantly

[0007] 5. It is difficult to freely realize the internal cleaning and maintenance of the independent sealing system

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