100 results about "Melicertus" patented technology

The invention provides a compound enzyme feed additive capable of improving growth rate and non-specific immunity of prawns and application of the compound enzyme feed additive. The additive comprises mannase, xylanase, cellulase, a saccharifying enzyme, lipase, alpha-amylase, beta-amylase and neutral protease. The components are compounded and proportioned with a special carrier and are added into prawn feed by an additive amount of 0.2-0.3%. The product is environmentally friendly, can be used for industrialized production on a large scale, and a novel growth feed additive is provided for aquatic feed. The compound enzyme feed additive provided by the invention can remarkably improve growth of penaeus monodon, has the purposes of improving true nutritive value and reducing the food coefficient, and has promoting effects to different extents to activities of intestinal amylase, lipase of hepatopancreas and serum SOD (Superoxide Dismutase). Compared with additives with similar functions, the additive provided by the invention has the advantages of safety, specifity, no residues, no side effects and the like.

The invention relates to a primer pair, amplification reagent, amplification kit and detection method for detecting Enterocytozoon hepatopenaei of penaeus vannamei and application. The primer pair for detecting the Enterocytozoon hepatopenaei is designed and is composed of primers EHP-F and EHP-R; and a fluorescent probe EHP-P is designed. Amplification of a target gene of the Enterocytozoon hepatopenaei based on a RPA technology can be successfully achieved; the detection method disclosed by the invention is based on the RPA technology and can be used for specifically detecting the Enterocytozoon hepatopenaei; and the method is simple and convenient in operation, high in sensitivity, mild in reaction conditions and short in reaction time and can meet the primary needs of a farm on site detection.

The invention discloses a functional feed additive. The functional feed additive comprises the following components in parts by weight of 5-17 parts of paeonol, 8-20 parts of ferulic acid, 10-30 partsof curcumin and 33-77 parts of microcrystalline cellulose. The feed additive disclosed by the invention is a purely natural composition, is free from toxic and side effects, is free from drug residues, and is safe and reliable; the functional feed additive is added to a basal feed according to the mass percentage of 0.05%-0.5%, and then the basal feed containing the functional feed additive is fed to aquatic animals, so that the healthy growth of the aquatic animals including Tilapias, grass carps, megalobrama amblycephala, procambarus clarkii and penaeus vannamei can be promoted, the immunity can be enhanced, and muscle quality can be improved.

The invention relates to a method for killing EHP (Enterocytozoon hepatopenaei) on Penaeus vannamei. The method comprises the steps: mixing essential oil into shrimp feed firstly, feeding Penaeus vannamei for two days or above, performing water change and pollution discharge after feeding on a culture pond two times or above in the feeding period, and performing medicated bath by using a sea saltelectrolytic solution-aqueous chlorine dioxide preparation so as to kill and eliminate EHP on Penaeus vannamei successfully. The domestic and foreign EHP treatment technology is supplemented, the economic benefits are high, the killing effect on EHP is fast, the operation is simple, and promotion is quick and convenient.

The invention discloses a fresh water aquaculture method for penaeus vannamei. The fresh water aquaculture method comprises the following steps of: preparing a penaeus vannamei pond; desalting penaeus vannamei larvae; improving the immunity of the penaeus vannamei by using Chinese herbal medicines; regulating and controlling the water quality; biologically preventing and controlling; and daily managing and harvesting the penaeus vannamei. The fresh water aquaculture method is characterized by comprising the following steps of: artificially enclosing colored cloth at corners of a fish pond to form a desalination box; artificially configuring chemical raw materials into sea water in the desalination box and gradually desalting the sea water to form fresh water; enabling the penaeus vannameilarvae to gradually adapt to the growth in the fresh water; carrying out health care in the growth process by adopting the Chinese herbal medicines researched by Zhongshan University; and controllingthe water body by using a clarias leather or grass carp to prevent pests from being spread. Under the condition of sufficient feed, the penaeus vannamei can quickly and healthily grow. The fresh water aquaculture method is simple, easy in operation and convenient in popularization and application; according to the breeding demonstration of 68 popularizing demonstration sites with 2000mu in Li county of Hunan Province, 400-600 kilos of penaeus vannamei are produced in each mu, the production value is 12800-19200yuan, the profit is 8000-12000yuan of each mu and the cultivation success rate reaches 100 percent; and the fresh water aquaculture method is deeply favored by local farmers.

The invention provides a recognition device for analyzing the starvation degree of penaeus vannamei boone based on underwater imaging. The recognition device comprises a support, a camera installed atthe top of the support, a plurality of light sources for illumination and a processor connected with the camera. The processor receives prawn images collected by the camera, extracts prawn edge images after preprocessing, and calculates prawn movement speed and bait quantity after head and tail identification so as to identify prawn hunger degree. The invention further provides an identificationmethod for analyzing the starvation degree of the penaeus vannamei boone based on underwater imaging. Through the prawn images which are photographed in real time, the starvation degree of prawns is judged, breeding personnel are guided to feed the prawns, and reasonable breeding of the prawns is achieved.