7 results about "Oreochromis" patented technology

The present utility model relates to a process for producing feed for saline-tolerant tilapia (Oreochromis niloticus) fry and fingerlings using a β-cyclodextrin-encapsulated lemongrass essential oil-based feed additive. The utility model addresses the technical problem of incorporating volatile antimicrobial essential oils into aquaculture feed while maintaining their stability, uniform distribution, and compatibility with conventional feed pellet manufacturing. The process comprises preparing a dry feed mixture, combining the encapsulated feed additive with a binding agent, gradually incorporating the resulting liquid mixture into the dry feed mixture, pelletizing, drying, and storing the feed pellets. The process produces nutritionally balanced feed containing uniformly distributed encapsulated lemongrass essential oil with improved stability and handling characteristics. The disclosed process is particularly useful for producing feed for hatchery and nursery culture of saline-tolerant tilapia fry and fingerlings as a practical alternative to conventional antibiotic-based feed production.

The present application relates to the field of molecular biology, further to an Oplegnathus punctatus intergenic region specific marker of MPP2 / ELF3 gene, primer pair and application and detection method. The specific marker of the intergenic region insertion variation of the Oplegnathus punctatus MPP2 / ELF3 gene is a DNA fragment specific to the non-insertion and insertion of the intergenic region of the Oplegnathus punctatus MPP2 / ELF3 gene, and the nucleotide sequence of the DNA fragment is shown as SEQ ID NO:1 and SEQ ID NO:2. The present application amplifies 469bp and 185bp bands in individuals with DNA insertion variation by using a pair of primers, and only amplifies 185bp bands in individuals without insertion variation. The detection method of the present application significantly shortens the identification time, improves the detection efficiency, and has important application value in the sex identification and family selection of the offspring of the hybridization between Oplegnathus punctatus males and Oplegnathus stripatus females.

The application discloses a kind of real-time detection equipment and system of passive acoustic and hydrological environment of yellowlip fish, acoustic signal acquisition module and hydrological parameter acquisition module are integrated in the same pressure-resistant sealed cabin, power module, data processing and control module and its clock are shared, millisecond / second level synchronous acquisition and association of underwater acoustic signal and hydrological environmental parameter are realized, spatial consistency and time synchronism of data acquisition are physically ensured, system error and operation complexity caused by independent clock drift and spatial separation are fundamentally eliminated, the quality and reliability of collected data are improved, so that the response relationship between the specific sound emission behavior of yellowlip fish corresponding to underwater acoustic signal and the instantaneous environmental change corresponding to hydrological environmental parameter can be accurately quantified;And integrated equipment simplifies the deployment recovery process, two types of data collection are completed at the same time in one operation, reduces operating cost, and reduces the interference frequency of sensitive species.

The application provides a tilapia antibacterial peptide OnLEAP-2 and an application thereof, and an antibacterial peptide named OnLEAP-2 is cloned from tilapia, and a large amount of the antibacterial peptide is obtained through prokaryotic expression. The antibacterial peptide has a good effect of resisting Streptococcus agalactiae, so that the survival rate of the tilapia is significantly improved, and pathogens are efficiently removed. The antibacterial peptide is suitable for the prevention and treatment of bacterial diseases of economic fishes such as tilapia.

The invention discloses a tilapia mossambica trapping net cage and a trapping method, and belongs to the technical field of aquatic product fishing equipment. The net cage comprises a cage body, an anti-escape trapping net, a floating device and an internal bait system, the box body is of a cube structure with an open top surface and a stainless steel frame on the bottom surface; the anti-escape trapping nets are arranged on the four sides of the box body and are composed of multiple sets of inlet frames and cylindrical tubular nets at the upper end and the lower end, each inlet frame comprises a circular-truncated-cone-shaped structure with the wide outer portion and the narrow inner portion, and barb anti-escape structures formed by combining petal faces and pistil faces are arranged on the inner sides of the inlet frames. The trapping method comprises the steps of shore-based layout, bait and lamp installation, standing trapping, overall shore pulling, frame water-leaving dehydration and inclined fish unloading, and shore-based operation is conducted in the whole process. The tilapia mossambica trapping device is compact in structure, high in trapping efficiency, good in escape prevention performance, capable of reducing fish body injury and fish mixing rate, safe and convenient to operate and suitable for large-scale tilapia mossambica fishing operation in water areas such as reservoirs and ponds.

The present utility model relates to a process for producing feed for saline-tolerant tilapia (Oreochromis niloticus) fry and fingerlings using a β-cyclodextrinencapsulated citronella (Cymbopogon nardus) essential oil-based feed additive. The utility model addresses the technical problem of uniformly applying a volatile antimicrobial feed additive onto feed pellets while preserving its stability and compatibility with conventional feed production. The process comprises preparing a liquid coating mixture by combining the encapsulated feed additive with a binding agent, applying the coating mixture onto feed pellets through thorough mixing, and drying the coated pellets under controlled ambient conditions. The process produces feed pellets with substantially uniform coating, improved adhesion, and enhanced stability of the encapsulated citronella essential oil. The disclosed process is particularly useful for producing antimicrobial feed for hatchery and nursery culture of saline-tolerant tilapia fry and fingerlings as a practical alternative to conventional antibiotic-based feed preparation.