69results about How to "Reduce cannibalism" patented technology

The invention relates to a method for cultivating the Krause's crayfish, comprising that cleaning the field, cultivating the parental crayfish, cultivating the seed and taking off, cultivating the rice. The invention is characterized in that the cultivation of parental crayfish is processed in the surrounded groove, which has an anti-jump device and near the ground arranges seed holes at 0.8-1.2cm diameter; the crayfish seed can pass through the holes into the field. The invention can pre-cultivate the parental crayfish to avoid damaging the rice. And the invention can obtain many benthic fauna as the bait of parental crayfish, seed, or the like.

A mixed forage for the later-phase larvae of scylla is prepared proportionally from protein, fat, fibers, Ca, P, and phosphatide through pulverizing, sieving, mixing, adding peptone, fish slurry and edible oil, mixing, modifying, granulating, drying and cooling.

The invention discloses a cherax quadricarinatus breeding method. The method comprises the following steps of pond selection, pond disinfection, breeding water treatment, compound bacteria culture, shrimp fry stocking, feed feeding and pond management. According to the breeding method, by reasonably arranging a shelter, breeding compound bacteria, adding EM bacteria and traditional Chinese medicine powder into feed and the like, breeding is conducted under the condition of not using hormones or antibiotics, the method has the advantages of being ecological, environmentally friendly, less in investment, low in cost and convenient to manage, and the cherax quadricarinatus obtained through breeding is high in survival rate, high in growth speed, healthy and strong in physique, high in diseaseresistance and high in stress resistance.

The invention discloses a breeding method for improving the survival rate of Australian freshwater lobsters. The breeding method comprises the following steps of pond selection, pond sterilization, breeding water treatment, young lobster stocking, compound bacterium culture, feed putting and pond management. By reasonably arranging shelters, placing tourmaline, stocking compound bacteria, feedingdifferent feeds at different growth stages and adopting other modes, breeding is performed without hormones and antibiotics, the breeding method has the advantages of being environmentally friendly, free of pollution, small in investment, low in cost and convenient to manage, bred Australian freshwater lobsters are high in growth speed, healthy and strong in physique condition and strong in disease-resistant capability and stress resistance, and the survival rate reaches 95% or above.

The invention discloses an application method for ecologically breeding macrobrachium nipponensis and Odontobutis obscura in a pond by utilizing an artificial ecological base. The method comprises the following steps of (1) pond selection; (2) forming of pond artificial ecological base layout and biological film; (3) fry stocking; (4) feedstuff feeding; (5) water quality regulation and control and daily management; (6) fishing of grown macrobrachium nipponensis and grown Odontobutis obscura. Compared with the prior art, according to the method, the water quality of the pond can be kept good and stable, water does not need to be replaced in the whole breeding period except in the season with higher water temperature, new water is added to increase the water level, no breeding wastewater is drained, and the ecological benefits are obvious; the biocenosis such as microorganisms and algae on the ecological base can provide the suitable habitat for shrimp seeds and the Odontobutis obscura; the Odontobutis obscura is utilized for catching and feeding on the weak and sick shrimp seeds and autumn seeds bred in august; the breeding disease rate of the macrobrachium nipponensis is reduced; the out-of-pond specification and yield of the grown macrobrachium nipponensis are improved, and the economic benefits are obvious.

The invention discloses a method for ecological culture of Australia crawfish. The method comprises the following steps of 1 pond selection, 2 pond disinfection, 3 culture water treatment, 4 crawfishlarva stocking, 5 feed feeding and 6 pond management. The culture method is ecological, environmentally friendly, low in investment and cost and convenient to manage, and the obtained Australia crawfish has the advantages of being high in survival rate and growth speed, robust in physique, high in disease resistance and stress resistance and the like.

The invention relates to a method for cultivating Hemifusus tuba with a net cage in a hanging way. In the method, a single-layer cage-shaped cultivating cage tool consisting of a cage plate (1) with the diameter of 45-50cm and a polyethylene net (2) with the mesh size of 0.5-1.5cm is used for cultivating young Hemifusus tuba with the average height of 30-40mm and the average weight of 2-3g in a hanging way and 10-15 young Hemifusus tuba are cultivated in each cage. The method comprises the following steps of: filling the young Hemifusus tuba in the cultivating cage tool; hanging in a hanging pond at a water layer with the depth of 0.7-1.4m, wherein the distance between every two adjacent cages is 0.2-1m; feeding the Hemifusus tuba with fresh oyster with shell every 10 days; cleaning the net cage before feeding, cultivating until harvesting time of the Hemifusus tuba. The method disclosed by the invention improves the living environment of the Hemifusus tuba to the maximum extent and reduces the diseases caused by the pollution such as residues, wastes and the like, and reduces the cannibalism phenomenon, thereby effectively improving the survival rate and the growth speed of the Hemifusus tuba; simultaneously, the method can reduce the feeding quantity, the feeding time and the labor intensity.

The invention relates to a larval micropterus salmoides food conversion domestication method. The method is characterized by comprising the following steps of (1) selecting and setting a domesticationpool; 2) preparing before stocking; 3) putting fries; 4) food conversion domestication, specifically, I, feeding live freshwater rotifers; II, after 1-3 days, mixing frozen rotifers with water for feeding; III, after 1-2 days, carrying out feeding through mixed feed, wherein the mixed feed is obtained by mixing the frozen rotifers with water and artificial compound granular baits according to themass ratio into paste, and sequentially reducing the number of the frozen rotifers according to the proportion of 1: 1, 0.75: 1 and 0.5: 1 until the frozen rotifers are completely replaced by the artificial compound granular baits; and IV, after 1-2 days, carrying out feeding for 1-2 days through the artificial compound granular baits; 5) daily management; and (6) putting fries into a pond, namely transferring the successfully-fed micropterus salmoides fries to an outdoor soil pond for culture, wherein the culture baits are all artificial compound granular baits. According to the method, through continuously adjusting the proportion of the mixed feed for food conversion domestication, the larval micropterus salmoides fries are induced to be fed with the artificial compound granular baitsin an initial stage, the feeding cost is reduced, and the survival rate in the domestication and food conversion process is increased.

The invention provides a grouper fry breeding box. The breeding box includes a breeding box. The upper end of the breeding box is open and has a cover at one end. One end of the cover is hinged to thebreeding box. The breeding box has a plurality of partition plates. The partition plates divide the breeding box into a chamber I, a chamber II and a chamber III, and the upper ends of the partitionplatesare provided with mounting grooves. Both sides of each mounting groove are respectively provided with drilling holes penetrating through both sides of each mounting groove, and the drilling holes located in both sides of each mounting groove are arranged parallel to each other. Rectangular insertion plates are inserted into the mounting grooves, and the insertion plats are provided with a plurality of matching holes penetrating throughboth sides of the insertion plates. The matching holes and the drilling holes are misaligned.When the insertion platesare pulled up, the matching holes canbe communicated with the drilling holes. The inner walls of one sides of the chamber I and the chamber II are respectively fixedly provided with a plurality of micro-pumps. The micro-pumpsare provided with horizontally-disposed water outlet pipes, and the water outlet directions of the water outlet pipesare toward the drilling holes. Thegrouper fry breeding box has a simple structure and ingenious designand reduces the fratricidalbehavior of the grouper.

The invention discloses a cultivating method of marmoratus fish fries. The cultivating method includes using chlorella liquid to reduce noxious substance in water body under the light-control, temperature-control and water-control conditions, intensifying water flea, increasing nutrition of fries and advanced fries, reducing death rate during a transformation period from the fries to the advanced fries, utilizing shells to form a shielded place on the bottom of the water body and sargassum algae to form a shielded place from the bottom of the water body to water surface to hide the fries and the advanced fries, avoiding killing and devouring during period of the fries and the advanced fries, and increasing survival rate. The survival rate of the marmoratus fish fries can reach 29% or so, and cultivating cost of the marmoratus fish fries can be reduced by domesticating the marmoratus fish fries with compound feed to enable the marmoratus fish fries to adapt the compound feed.

The invention discloses a river crab and cray polyculture method. The river crab and cray polyculture method comprises the following steps: cleaning up of a pond, planting of water plants, throwing in of snails, stocking of seeds, throwing in of feeds and final-period management. Scientific management is adopted to reduce the morbidity, so that the survival rate and the yield are improved; and the river crab and cray polyculture method has favorable economical benefits.

The invention discloses a barley pest breeding method. The method comprises the following steps: preparation of feed, preparation of a breeding box, preparation of an incubator, feed casting, egg collection and hatching as well as feeding management. When barley pests are bred with the method, mutual interference and killing under the condition of social feeding can be reduced effectively; through strict control of feed and breeding density, the percentage of pupation of the barley pests is increased while the nutrients required by growth of the barley pests is guaranteed, the economic benefit is increased, and the excellent barley pest breeding method has the advantages of low labor intensity, high percentage of pupation, low cost and the like.

The invention relates to a pan-type fry culturing method for Procambrus clarkii, in particular to completing the process of breeding Procambrus clarkii fries in a pan-type container, belonging to the technical field of aquiculture. The method is characterized by comprising the following four steps of fry breeding pan selection, fry breeding preparation, parent shrimp stocking and management and shrimp fry breeding. Only one female shrimp or ovigerous shrimp is put in a fry breeding pan, and therefore, the specification of bred shrimp fries is regular, the cannibalism rate is reduced, and the shrimp fry survival rate is improved. The fry breeding pan is put in a dark fry breeding room, and therefore, the development rate of the sex gland of the female shrimp is high; the fry breeding operation is convenient, and the fry breeding efficiency is higher than that of the traditional fry breeding mode. The pan-type bred fries are not influenced by the change of the external climate; the shrimp fries hatched out on the same day are raised under the same ecological condition, being beneficial to developing mass selection. The invention is suitable for being popularized and applied in domestic Procambrus clarkii breeding farms and scientific research departments.

The invention provides a method for constructing an Exopalaemon carinicauda reciprocal backcross family. The method includes the following steps: (1) parent shrimp selection; (2) parent shrimp mating; (3) cultivation and breeding of F1 offspring seeds; (4) parent-child backcross; and (5) cultivation and breeding of backcross progeny offspring seeds. Male and female Exopalaemon carinicauda parent shrimps which are distributed naturally or bred artificially and have excellent characters are selected, and the reciprocal backcross family can be acquired through completely-artificial breeding, aquaculture and parent-child mating; the success rate of construction of the reciprocal backcross family can reach 75%, and can provide material and technique support for quantitative character genetic analysis, near-isogenic line construction and back cross breeding of the Exopalaemon carinicauda.

The invention discloses a large-scale breeding and egg hatching method of adult Pasha worms, which comprises the following steps: (1) building a breeding room: setting the breeding room to be a flowing water environment and placing attachments for eggs in the breeding room; (2) carrying out breeding and spawning of the adults: when the wings of the adults after eclosion are bloodshot and tanned and the adults are free to fly, putting the adults in the breeding room in the step (1), or transferring the adults to a breeding cage, providing a nutrient solution to the adults, and after the adults mate and soon lay egg masses on the attachments, transferring the egg masses to a hatcher; and (3) hatching the eggs: hatching under the conditions that the temperature is 25-30 DEG C, the environment humidity is 70-80% and the illumination is 12:12 and timely transferring the larvas to a breeding box after the hatching is completed. The invention aims to technically realize large-scale breeding and efficient egg hatching of the adult Pasha worms.

The invention discloses an industrial circulating-water larva breeding method for freshwater shrimps in freshwater. The industrial circulating-water larva breeding method adopts a parent breeding, larva hatching and larva breeding sectional type breeding mode and comprises the following steps: breeding parent freshwater shrimps in a system capable of realizing circulation of an aquaculture water body, wherein male parent freshwater shrimps and female parent freshwater shrimps are mixed and bred together until egg-carrying freshwater shrimps are formed after copulation and egg laying of the male parent freshwater shrimps and the female parent freshwater shrimps; screening the egg-carrying freshwater shrimps in different embryonic development periods, and placing the egg-carrying freshwatershrimps in the same or similar embryonic development periods together for breeding and hatching so as to obtain larvae, wherein the whole larva hatching stage is carried out in a system capable of realizing circulation of the aquaculture water body; when the larvae are in a floating state in 3-5 days after being hatched, stocking the larvae into a treated aquaculture pond for breeding with nutrients and water, wherein submerged plants are planted at the bottom part of the aquaculture pond for the larvae to inhabit and avoid enemies; and when the larvae are 1.5-2.0 cm long, separating the larvae into different ponds. The industrial circulating-water larva breeding method provided by the invention can improve the larva breeding quality of the freshwater shrimps; and the freshwater shrimps can appear on the market 2 months earlier.

The invention discloses a two-purpose pond for breeding and cultivating procambarus clarkii, and relates to the technical field of procambarus clarkii breeding. The two-purpose pond comprises a breeding pond, a culture pond and a round pipe; the depth of the breeding pond is smaller than that of the breeding pond, and the breeding pond is fixedly arranged and close to the culture pond; a slope isfixedly arranged at the bottom of the breeding pond, and the lower end of the round pipe is vertically and fixedly arranged on the slope; the upper end of the round pipe is provided with an opening, and the upper end surface of the round pipe is flush with the upper end surface of the culture pond; the lower part of the round pipe is provided with a through hole, and the breeding pond communicateswith the culture pond pass through the round pipe; therefore, the defects that existing procambarus clarkii mixed culture can cause disputes and cannibalism among procambarus clarkii at different growth stages, and thus, low yield of the procambarus clarkii is caused are overcome, and a breeding process and a culture process of the procambarus clarkii can be separated to increase the yield of theprocambarus clarkia, and the disease resistance of the procambarus clarkii is improved.