Aquatic animal hypoxemia experimental facility and experimental method thereof

Abstract

The invention relates to an aquatic animal hypoxemia experimental facility and an experimental method thereof, wherein the content of dissolved oxygen in water of the experimental facility is required to be maintained stably relatively. An aquarium with a glass cover and a water quality analysis device are used in the experimental facility; the experimental facility is characterized in that the aquarium and the water quality analysis device are connected together through a communicating pipe; the opening of the aquarium with a glass cover along the inner side is connected with a seal rubber ring which is matched with a seal cover plane; a plurality of screw holes are distributed on the seal cover plane; each screw hole is screwed in a ventilating insertion pipe with threads; the upper end of the ventilating insertion pipe is provided with a small seal nut. The experimental method comprises the following steps of: before experiment, injecting experimental water into the glass aquarium; putting experimental fish in the water; covering the aquarium with the seal cover provided with the ventilating insertion pipe; presetting the starting number of the ventilating insertion pipes of the seal cover according to the oxygen consumption of experimental fish in unit time; starting the experiment when the dissolved oxygen in the water is stabilized to the experiment-needed low oxygen level; during the experiment, if major change of the dissolved oxygen occurs in the water, taking off a part of screw nuts of the ventilating insertion pipes or increasing the sealing number to adjust the air amount of water.

Description

technical field [0001] The invention relates to an aquatic organism experiment device and a test method thereof. Background technique [0002] As a special water environment where freshwater and saltwater are mixed at the intersection of ocean and land, estuaries are sensitive to changes in environmental factors. In recent years, due to the impact of human activities, the use of agricultural chemical fertilizers has increased dramatically, which has aggravated the pollution of the estuary area, making the estuary an obvious trend of eutrophication. The increase of chemical oxygen demand and biological oxygen demand in some eutrophic waters leads to hypoxia in local waters. The dissolved oxygen level in water often affects the growth and reproduction of organisms and reflects the pollution status. Usually, fish generally need 6mg / L dissolved oxygen to meet the growth and reproduction needs, and crabs and shrimp need more than 2-3.5mg / L dissolved oxygen. Hypoxia not only aff...

AI Technical Summary

Problems solved by technology

The three methods have similar disadvantages: 1. The operation and test equipment are relatively complicated; 2. The dissolved oxygen will gradually decrease due to the consumption of biological respiration during the experiment, and a relatively stable dissolved oxygen concentration cannot be maintained; 3. It is not suitable for a long time Physiological Experiment Requirements of Time

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