13 results about "Live feed" patented technology

The present invention relates to: a feed composition for zooplankton, comprising biomass derived from Schizochytrium sp. microalgae; a method for culturing zooplankton using same; and an aquaculture method for fish or crustaceans. The biomass derived from Schizochytrium sp. microalgae of the present invention has the effect of nutritionally enriching zooplankton, and when zooplankton fed with the biomass is fed to fish or crustaceans, growth of fish or crustaceans is promoted and non-specific immunity is enhanced, and thus the biomass can be effectively used as a feed composition or a feed additive.

This invention relates to a method for the targeted cultivation of live feed to enhance the stress resistance of grouper fry, specifically a method for the targeted cultivation of grouper fry and its live feed. The live feed includes artichoke culture and rotifer culture. The targeted cultivation of the artichoke culture includes the following steps: placing artichokes in seawater, adding *Cryptospira spp.* powder, *Spirulina* powder, arginine, and *Cinnamomum camphora* oil for cultivation to obtain the artichoke culture; the targeted cultivation of the rotifer culture includes the following steps: placing rotifers in seawater, adding *Nyctaginus* pink bacteria. Natrialba pink Rotifer cultures were obtained by cultivating bacterial powder, spirulina powder, methionine, and sunflower oil. This method, through targeted cultivation of live feed, enriches the live feed with corresponding functional components. After feeding it to newly hatched juvenile scorpion, it can significantly improve the stress resistance of the juveniles and increase their survival rate, thus solving the industry pain points of slow development, low survival rate, and poor stress resistance of newly hatched scorpion scorpion.

The invention provides a nutrient enrichment method for hatched fairy shrimp nauplii, which specifically comprises the following steps: (1) an initial hatching stage: 1-20 days after the fairy shrimp nauplii are hatched, adjusting the salinity of a culture pond to be 25-35% o, the dissolved oxygen to be 5-7 mg / L and the temperature to be 25-28 DEG C, alternately irradiating by adopting different illumination light A, and feeding nutritional feed A every day; and (2) a later stage: 20-40 days after incubation of fairy shrimp nauplii, adjusting the salinity of the culture pond to be 35-45% o, the dissolved oxygen to be 5-7 mg / L and the temperature to be 28-30 DEG C, injecting water and rolling over every 3-5 days, alternately irradiating by adopting different light B, feeding nutritional feed B every day, and harvesting strengthened fairy shrimps. According to the method, the initial incubation stage and the later stage are set, in each stage, a specific illumination irradiation mode is adopted to be matched with nutritional feed, rapid growth and nutrient enrichment of the incubated fairy shrimp nauplii are promoted, the body length of the enriched fairy shrimps is 10.5-12.7 mm, the crude protein content is 78.4-82.4%, the content of long-chain polyunsaturated fatty acids EPA and DHA is increased, and the yield of the fairy shrimps is increased. The feed is an excellent live bait for aquatic animals.

Disclosed are nutritional supplements suitable for ingestion by shrimp larvae or fish larvae. The nutritional supplement comprises a granular gel structure, wherein the granular gel structure comprises agar, an attractant and water; and an aqueous medium comprising at least one salt. The particulate gel structure may be made in the form of gel particles, such as particles, and the gel particles may be added to the aqueous medium. The invention also relates to a method for preparing the nutritional supplement and a method for co-feeding the nutritional supplement to shrimp larvae or fish larvae with at least one wet feed or dry feed, such as a fully wet feed or fully dry feed.

This invention relates to the field of aquaculture technology, and more particularly to a method for large-scale grouper fry rearing based on outdoor-indoor relay rearing. The method includes: using black film ponds as outdoor hatching ponds, disinfecting and conditioning the water before controlling its quality; feeding grouper fertilized eggs in stages after hatching, adjusting the feed according to the mouth size of the fry, and preparing for transfer when 60% of the fry have a mouth size >2200μm; using PVC ponds as indoor rearing ponds, introducing water after multi-stage filtration, disinfection, and detoxification, and controlling the temperature to maintain an indoor-outdoor temperature difference of <2℃; transferring qualified fry to the indoor ponds, disinfecting them with a micro-flow of water, and then distributing them into the rearing ponds; cultivating, strengthening, and disinfecting live feed; feeding the fry in stages indoors according to mouth size, initiating feed acclimatization when 60% of the fry have a mouth size >5mm; controlling the fry density and conducting daily management. The advantages are: integrating the low-cost, large-scale outdoor operation with the high controllability of indoor rearing, improving fry survival rate and seedling quality, and meeting the needs of large-scale aquaculture.

This invention relates to the field of aquaculture technology, specifically a feed formulation and preparation method for improving the reproductive performance of broodstock tiger prawns. The method includes: determining the specific nutritional requirements of broodstock tiger prawns during gonadal development; screening core animal and plant protein sources and determining their basic mass ratios accordingly; performing targeted biological treatment on the core raw materials to enrich gonadotropin-active small molecules; compounding these with phospholipids, attractants, vitamins, and minerals to form a functional additive combination; mixing the core raw materials and additive combination in proportion, granulating, and adding antioxidants during processing; and finally verifying the formulation effect and confirming the final compound feed through standardized aquaculture trials. The compound feed obtained based on this method can effectively replace traditional live feed, improve broodstock tiger spawning, hatching rate, and larval quality, and has advantages such as balanced nutrition, stable quality, and suitability for large-scale production, solving the industry problems of live feed being prone to pathogens, supply fluctuations, and high costs.

The invention relates to the technical field of mandarin fish feed preparation, and discloses a mandarin fish culture feed preparation device which comprises a box body, a box cover is mounted at the top end of the box body, a feeding port is formed in the middle of the box cover, and a feeding seat communicated with the feeding port is arranged at the top end of the box cover; a vacuum pump and a carbon dioxide inflation tank which are located on the two sides of the feeding base and communicate with the box body are installed at the top end of the box cover, a granulation base and a stirring base are installed in the box body, the stirring base is located below the granulation base, the inner walls of the vertical sections of the stirring base and the granulation base are each of a trapezoidal structure, and granulation holes are formed in the bottom end of the granulation base at equal intervals. The cross section of each granulation hole is of an S-shaped structure; the feed is pressed and formed into an S-shaped structure under the condition of carbon dioxide, carbon dioxide exists in the feed in the pressing process, the feed which contains the carbon dioxide and is of the S-shaped structure jumps in water, the purpose of simulating the movement of live feed is achieved, then the eating rate of the feed is increased, and the problem that the eating rate of the feed is low is effectively solved.

The invention provides a method for preventing and treating longhorn beetle larvae, which is characterized in that the longhorn beetle larvae are respectively prevented and treated and differentiated measures are taken aiming at three important periods of the longhorn beetle larvae by utilizing the living feeding characteristic of the longhorn beetle boring a rod and the larva harm characteristic, and a systemic insecticide is combined with a biological source pesticide to kill the longhorn beetle larvae in the early period of spring. In the early stage of summer, a strong systemic insecticide is adopted for key prevention, and in the last stage of autumn, parasitic infectious bacteria are adopted for biological prevention. According to the long-horned beetle larva prevention and control method, the improved high-pressure pesticide spraying device is used for directly conveying the pesticide to the surfaces of the larvae in the trees, and the method has the advantages of being easy to operate, accurate in prevention and control, low in pesticide dosage, efficient, low in toxicity and environmentally friendly; the technical problems that long-horned beetle larvae are deep and difficult to prevent and control and a traditional pesticide spraying mode is low in prevention and control efficiency are effectively solved.

The invention relates to a method for cryopreserving eggs, nauplii and young barnacles of barnacles. Furthermore, the present invention relates to the cryopreserved feed and the use of the preserved organisms as live feed organisms in marine aquaculture, typically in place of rotifers and artemia and other living feed organisms.

The utility model discloses a living feed emulsifier mixing device which comprises an emulsifier barrel and a supporting plate, the supporting plate is arranged in the emulsifier barrel, a connecting rod penetrates through the supporting plate, flat keys are fixedly connected to the two sides of the connecting rod and penetrate through the supporting plate, a first gear is fixedly connected to the bottom of the connecting rod, and a second gear is fixedly connected to the bottom of the connecting rod. Second gears are rotationally connected to the bottom of the supporting plate and located on the periphery of the first gear, the second gears are connected with the first gear in an engaged mode, and stirring rods are fixedly connected to the bottoms of the second gears. The feed emulsifying device has the beneficial effects that the uniform distribution of an emulsifying agent in feed can be ensured by mechanical stirring automation, the emulsifying effect is ensured, the stability of the feed quality is improved, nutritional ingredients in the feed are more uniformly distributed by uniform stirring, each part of the feed is ensured to contain a proper amount of nutritional ingredients, and the feed quality is improved. And compared with a traditional device, the operation quality and the use efficiency are greatly improved.

The invention discloses a method for cultivating, catching, strengthening and disinfecting Hucho taimen, and belongs to the technical field of aquaculture. The method comprises the following steps: carrying out symbiotic low-cost cultivation of unicellular algae and substrong Hucho taimen in an outer pond through an intermittent fertilization strategy; a waterwheel aerator is used for forming directional water flow, and the copepods are mildly collected in a 120-mesh temporary storage net cage to achieve low-damage fishing; specially-made fermented feed is fed into the net cage for precise nutrition enhancement for three days, so that the ratio of DHA to EPA in the body reaches 4: 1; and finally, performing efficient disinfection under specific parameters. The method systematically solves the problems of high cost, large damage, uneven nutrition and large biological safety risk in the traditional process, can stably obtain high-quality live bait with the survival rate not lower than 85%, high nutritional value and no specific pathogen, and has remarkable industrial application value.