3 results about "Daphnia" patented technology

This invention discloses a test method for evaluating the inhibitory effect of microbial pesticides on the activity of Daphnia macrocarpa, relating to the field of pesticide detection. The method includes an outer casing, a layered test cylinder, an air supply assembly, a water quality monitoring probe, and a light source. The outer casing has a hinged lid and a transparent observation window on its front. The layered test cylinder is housed within the outer casing. This method innovatively uses a layered test cylinder composed of a test cylinder, an isolation cylinder, and a pesticide loading cylinder. The Daphnia macrocarpa in the test cylinder is isolated from the microbial pesticide in the pesticide loading cylinder, but the water in the test cylinder and the pesticide loading cylinder exchange water through an exchange port. This method realistically simulates the natural exposure state of Daphnia macrocarpa in water containing microorganisms and effectively avoids the problem of microbial adhesion interfering with Daphnia macrocarpa activity, thus significantly improving the accuracy of the test results.

This invention discloses a simulated ecosystem for the preservation of Daphnia macrocarpa, comprising an upward-opening main ecological tank. Within the main ecological tank, from top to bottom, are a preservation and cultivation mechanism, a food self-cultivation mechanism, and a water purification mechanism. The preservation and cultivation mechanism includes a horizontally arranged preservation and cultivation support partition fixed within the main ecological tank. Multiple preservation and cultivation tanks with vertically extending axes are arranged on the preservation and cultivation support partition. Multiple first through holes communicating with the interior of each preservation and cultivation tank are opened at the bottom. This ecosystem constructs a closed-loop preservation system simulating a natural ecosystem, achieving integrated operation of food self-sufficiency, water self-purification, and environmental self-control during the preservation of Daphnia macrocarpa. This avoids the risks of exogenous pollution and stress damage to the Daphnia macrocarpa caused by manual operation, enabling long-term stable preservation of Daphnia macrocarpa.

The application relates to the technical field of zooplankton culture, and discloses a daphnia magna propagation system and method, which comprises a pretreatment unit and a daphnia magna propagation tank. The pretreatment unit comprises a water storage bin, an overflow box and a pulverizer. A water inlet and a water outlet are arranged on the water storage bin. The overflow box is fixedly arranged in the water storage bin. The pulverizer is fixedly arranged in the overflow box. The daphnia magna propagation tank is connected with the water outlet. Water and algae for daphnia magna culture enter the water storage bin through the water inlet, are crushed by the pulverizer, and then enter the daphnia magna propagation tank through the water outlet for daphnia magna to eat. The water storage bin, the overflow box and the pulverizer can crush the algae with a particle size not meeting the requirements and add the algae into the daphnia magna propagation tank. The method can save the input cost of the algae, realize automatic addition of the algae, and improve the propagation efficiency of the algae.