8 results about "Fish larvae" patented technology

The subject of the application is the use of allyl ester of 7-hydroxy-2-oxo-2H-chromene-3-carboxylic acid, represented by general formula 1, for staining bone tissue and mineral structures of larvae of fish of the Danio rerio species in order to assess the development of the skeletal system in biomedical research.

The invention discloses a fry domestication and cultivation device, and relates to the technical field of aquaculture equipment. The device comprises a fishpond groove, a support structure, a detachable net cage structure, a feeding structure and a shielding structure, a V-shaped sewage collecting structure composed of a slope boss is arranged at the bottom of the fishpond groove, and residual feed and excrement are discharged in a concentrated mode in cooperation with a sewage pump; an aerator is arranged in the sewage collection area to improve the dissolved oxygen level of bottom water; the inner wall of the tank is provided with a flushing nozzle capable of adjusting the spraying direction and flow and used for simulating a natural water flow environment; the top shielding structure can be adjusted in a sliding mode and is matched with the spotlight to achieve illumination control. The device is reasonable in structure, high in function integration level, capable of effectively improving the water quality environment, reducing the fry stress response and improving the feeding domestication success rate and survival rate and suitable for multi-stage fry domestication and cultivation.

The present invention is enclosed in the area of animal feed, in particular in the field of fish feed. Aquaculture has emerged as a crucial sector in meeting the growing global demand for seafood. However, stress in aquaculture fish species can arise from numerous sources including handling, transportation, environmental fluctuations, and interactions with conspecifics. The object of the present invention is a feed comprising kyotorphin (KTP), preferably in its amidated derivative (Tyr-Arg.NH2) and a protein hydrolysate. The KTP is present in the feed by supplementation of analogues, or endogenously within as part of a dietary protein hydrolysate, as the dipeptide TyrArg. The purpose of the present invention is to provide a functional feed to mitigate stress responses in fish species used in aquaculture by enhancing stress tolerance, disease resistance, and growth efficiency in fish, ultimately leading to improved production outcomes and economic returns for aquaculture operations.

To provide a method for capturing and investigating young eel fishes based on the evaluation of the capturing strength of the young eel fishes by which a minute target such as a capturing device for the young eel fishes in a water surface environment can be discriminated from a high spatial resolution remote sensing image.SOLUTION: The method acquires a high spatial resolution remote sensing image covering a survey area and subjected to pre-processing such as geometric correction. The image data of the high spatial resolution remote sensing image is then labeled to establish a high resolution remote sensing image eel fry capture device float sample data set. In addition, in order to improve the target detection algorithm YOLOv8 and avoid missed detection and false detection of small targets, an AFPN with the advantage of small target detection is introduced to replace the original detection head, and a small target detection layer is added. Finally, the improved model is used to identify a device for capturing juvenile eels.SELECTED DRAWING: Figure 10

The utility model discloses a fish fry hatching box with temperature detection function, including hatching box and heating case, the hatching box outside installs water pump group, the water inlet end department of water pump group is provided with the water pumping pipe that communicates with the hatching box inner chamber, and the hatching box inner chamber is close to the position of water pumping pipe and is provided with filter assembly, be provided with first detection box between water pump group and heating case. This fish fry hatching box with temperature detection function draws the flow of water in the hatching box through the work of water pump group, and the flow of water can be used for the detection of water temperature during the extraction process. When the water temperature is lower than the incubation water temperature, the extracted water flow can be heated separately by the heating case, improving safety. At the same time, further detection of the water temperature after heating can be used, which facilitates precise control of the water temperature in the hatching box. In addition, the hatching box can also play a filtering role during the flow of water, ensuring the water quality in the hatching box and facilitating the cultivation of fish fry after hatching.

The utility model discloses a single-ship net pushing system for continuously collecting larvae and macroplankton, which comprises a ship body, a fishing hole is arranged on the ship body, a fixing support is arranged at the fishing hole, a lifting mechanism is mounted on the fixing support, a lifting part of the lifting mechanism is fixed with an underwater support, an underwater driving motor is arranged on the underwater support, and the underwater driving motor is connected with the fishing hole. An output shaft of the underwater driving motor is coupled with the top end of the switching rod, the bottom end of the switching rod is connected with the net opening ring, and a conical bottom opening of the conical net is connected with the net opening ring. The device disclosed by the utility model can work in a narrow water body or a lake, the fish larvae or macroplankton can be collected by using conical netting gears with different meshes, and due to the fact that captured samples are easily taken out from the collection bag, continuous work can be realized, and the collection efficiency of the fish larvae and the macroplankton in the water body environment is improved.

This invention relates to the field of aquaculture water treatment technology and discloses a recirculating water treatment system for hatching fish larvae, including at least one hatching module and a treatment module. The hatching module includes a hatching container, and the interior of the hatching container is provided with an overflow area, a hatching area, and a water distribution area from top to bottom. The treatment module includes at least one multi-stage purifier for treating the wastewater generated during the hatching process. This invention adopts a dual-path sewage discharge mode with continuous upper overflow to discharge floating sludge and concentrated bottom conical surface to discharge sediment. The overflow area discharges low-turbidity surface water, and the water distribution area discharges high-turbidity sediment wastewater. The two sewage paths are uniformly discharged into the multi-stage purifier for unified purification and treatment. The multi-stage purifier adopts a three-stage treatment process: external inlet and internal outlet filter cartridge fine filtration + microfiltration layer secondary filtration + biological packing chamber biochemical degradation, which can efficiently remove suspended solids, uneaten feed, and debris, and simultaneously degrade toxic substances such as ammonia nitrogen and nitrite.

The utility model provides a screening device for juvenile grouper, which comprises a first fish platform and a second fish platform, a third fish platform is arranged between the first fish platform and the second fish platform, the first fish platform, the third fish platform and the second fish platform are arranged in a step-type laminated manner, and flow guide pipes are fixedly embedded at the side ends of the first fish platform and the third fish platform. A right-angle bent pipe is fixedly installed at the outer end of the flow guide pipe, a fish distributing plate is in threaded connection with the inner end of the flow guide pipe, and fish holes are formed in the fish distributing plate. The first fish platform, the third fish platform and the second fish platform which are stacked in a stepped mode are arranged, the flow guide pipes are arranged at the side ends of the first fish platform, the third fish platform and the second fish platform, the fish dividing plates are arranged in the flow guide pipes, and the fish holes which are sequentially shrunk from top to bottom are formed in the fish dividing plates, so that small juvenile groupers can penetrate through the fish holes; and entering the third fish platform or the second fish platform of the next layer, so that screening of the juvenile groupers is realized.