Testing apparatus for measuring activeness and metabolic rate of fishes under low oxygen condition

Abstract

The invention discloses a testing apparatus for measuring the activeness and metabolic rate of fishes under a low oxygen condition. The device includes a blending groove, a stabilizing groove and a measuring groove, sealing membranes with one-way air valves are arranged on the tops of both the blending groove and the stabilizing groove, oxygen dissolving probes are arranged on the upper portions of the blending groove and the stabilizing groove, an inert gas outlet is formed in the bottom of the blending groove, and the bottom of the blending groove is connected with the bottom of the stabilizing groove through a communicated water pipe; the center of the bottom of the stabilizing groove is provided with a propeller with a motor, and a water pump discharges water in the stabilizing groovefrom the bottom of stabilizing groove into the bottom of the measuring groove; an oblique porous base plate is arranged at the bottom of the measuring groove; an oxygen dissolving machine is arrangedat the bottom of the measuring groove; a cover plate is arranged on the upper portion of the measuring groove, and a pipeline with the oxygen dissolving machine is connected with the cover plate to discharge water in the measuring groove to the exterior. Water with low oxygen content, entering a behavior observation chamber, can be blended evenly to prevent that a result is influenced by high dissolved oxygen content or low dissolved oxygen content of a certain part; through design of multiple portions, generated bubbles can be removed, and the situation that behaviors of tested fishes under the low oxygen condition cannot be observed due to too many bubbles can be avoided.

Description

technical field [0001] The invention relates to a fish experiment device. Background technique [0002] Environmental hypoxia is a common natural phenomenon in aquatic ecosystems, and human activities caused by global warming, water eutrophication, and environmental pollution have further aggravated the hypoxic phenomenon in water bodies, often causing large losses to fisheries. Research on fish hypoxia tolerance is crucial to reducing fishery losses, and has always been an international research hotspot, but the relevant test equipment has been limited: the existing test equipment design is too simple and cannot fully solve the problem of dissolved oxygen in water. The problem of uniform mixing makes it difficult to control the accuracy of the test; the generation of air bubbles cannot be avoided during the measurement process, making it difficult to observe the behavioral response of fish under low oxygen. In addition, such devices often have a fixed volume, and only test...

AI Technical Summary

Problems solved by technology

Research on fish hypoxia tolerance is crucial to reducing fishery losses, and has always been an international research hotspot, but the relevant test equipment has been limited: the existing test equipment design is too simple and cannot fully solve the problem of dissolved oxygen in water. The problem of uniform mixing makes it difficult to control the accuracy of the test; the generation of air bubbles cannot be avoided during the measurement process, making it difficult to observe the behavioral response of fish under low oxygen

In addition, such devices often have a fixed volume, and only test fish of a specific size can be measured in the daily metabolic measurement process, which makes related research very limited

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