阅读说明：本技术 一种澳洲淡水龙虾的养殖方法 (Australia freshwater lobster breeding method ) 是由 刘捍卫 杨翠翠 于 2021-01-30 设计创作，主要内容包括：本发明提出了一种澳洲淡水龙虾的养殖方法,涉及水产养殖领域,该养殖方法包括：在搭建的冬暖棚内建造水泥池,水泥池上建薄膜棚,并安装锅炉和增氧机；种虾放养前在水泥池底种植伊乐藻,进水并对水体进行消毒；选择种虾放入繁育池培育,入池后再消毒,采用混合饵料进行喂食；遮光让种虾自然交配,转移雌虾至孵化箱进行孵化,孵化结束后再转移至雄虾所在的繁育池继续交配繁育；虾苗脱离母体一周后投喂丰年虫。本发明利用冬暖棚、水泥池和薄膜棚结合起到三层保暖的效果,模拟澳洲淡水龙虾的野外生存环境,通过控制水温来实现对龙虾生长、交配和催产的控制,从而达到一年繁育两次的目的,大大提高了龙虾的产量。(The invention provides a culture method of Australia crayfishes, which relates to the field of aquaculture and comprises the following steps: building a cement pond in the built winter greenhouse, building a film greenhouse on the cement pond, and installing a boiler and an aerator; before breeding the breeding shrimps, planting the waterweeds at the bottom of the cement pond, feeding water and disinfecting the water body; breeding selected seed shrimps in a breeding pond, sterilizing the seed shrimps after the seed shrimps are placed in the breeding pond, and feeding the seed shrimps with mixed bait; shading light to allow the seed shrimps to mate naturally, transferring the female shrimps to an incubator for incubation, and transferring the female shrimps to a breeding pool where the male shrimps are positioned after incubation to continue mating and breeding; feeding the fairy shrimp after the shrimp larvae are separated from the parent body for one week. The invention utilizes the combination of the winter warm shed, the cement pond and the film shed to play a role in three-layer warm keeping, simulates the field living environment of Australia freshwater lobster, and realizes the control of the growth, mating and spawning induction of the lobster by controlling the water temperature, thereby achieving the purpose of twice breeding in one year and greatly improving the yield of the lobster.)

1. The Australia crayfish breeding method is characterized by comprising the following steps:

building a breeding pool: firstly, building a shed on a flat ground, building a cement pool in the shed, building a film shed on the cement pool, and installing a temperature regulating device and an oxygenation device in the cement pool;

pretreatment of a breeding pond: planting submerged plants at the bottom of the cement pond 12-16 days before breeding the breeding shrimps, feeding water into the pond body, and disinfecting a water body;

breeding the breeding shrimps: breeding the seed shrimps in a breeding pond, sterilizing the seed shrimps in the breeding pond again, then placing lobster nests in the breeding pond, feeding the seed shrimps by adopting mixed baits of plant baits and animal baits, wherein the water temperature is 18-22 ℃, and changing the water 2-3 times per week;

spawning induction and hatching: slowly raising the water temperature to 26-28 ℃, covering a layer of shading net on the film shed to enable the breeding shrimps to mate naturally, hatching the breeding shrimps separately when the belly of the female shrimp has light yellow eggs to be discharged, transferring the breeding shrimps to a breeding pool where the male shrimp is located after hatching to continue mating breeding, and breeding the shrimp larvae separately.

2. The method for culturing Australian crayfish according to claim 1, wherein the submerged plant in the pretreatment step of the breeding pond is waterweed, and the planting process specifically comprises: filling mellow soil in the submerged tray, planting submerged plants on the mellow soil and placing the submerged tray at the bottom of the cement pool, wherein the submerged tray accounts for 1/2-1/4 of the total area of the pool bottom.

3. The method for culturing Australian crayfish as claimed in claim 1, wherein the influent water in the pretreatment step of the breeding pond is filtered through a bolting silk net of 100-120 meshes.

4. The method for culturing Australia crayfish according to claim 1, wherein the breeding pond pretreatment step is carried out twice, and the first disinfection time is 5mg/L povidone-iodine solution when water is fed; the secondary disinfection time is 3-5 days before breeding the seed shrimps, and 2mg/L povidone iodine solution is adopted.

5. The method for culturing Australian crayfish according to claim 1, wherein 1mg/L povidone-iodine solution is used for sterilization in the breeding step of the crayfish, and the ratio of the number of lobster nests to the number of the breeding crayfish is (1-2): 1.

6. the method for culturing Australian crayfish as claimed in claim 1, wherein the pool water in the breeding pool contains dissolved oxygen of more than 5mg/L, ammonia nitrogen of less than 0.8mg/L and nitrite of less than 0.06 mg/L.

7. The method for breeding Australian crayfish according to claim 1, wherein the mixed bait in the breeding step of the breeding crayfish is fed in an amount of 5 to 8% of the total mass of the breeding crayfish, and the mass ratio of the plant bait to the animal bait in the mixed bait is 1: (2-3).

8. The method of claim 7, wherein the plant bait comprises carrot, purple potato, corn gluten meal, bean cake, vegetable oil and Chinese herbs; the animal feed comprises earthworm meat, snail meat, dried small shrimps, fish intestines and fish oil.

9. The method for culturing Australian crayfish according to claim 1, wherein the number of the female crayfish in the incubation step is equal to the number of the hatching boxes, the temperature of the water in the hatching boxes is 31 to 33 ℃, and the flow rate of the water is 2 to 5m³The illumination intensity is 1000-2000 Lux, and the illumination time is 10-12 h/day.

10. The method for culturing Australian crayfish according to claim 1, wherein the culturing of the young crayfish is specifically: feeding fairy shrimp 5-7 days after the shrimp larvae separate from the parent, feeding opening materials 15 days later, wherein the opening materials comprise 30-50% of fish meal, 10-15% of a phagostimulant, 25-30% of earthworm powder, 8-10% of vegetable oil, 3-8% of compound vitamin and 3-8% of compound mineral.

Technical Field

The invention relates to the field of aquaculture, in particular to a method for culturing Australia crayfish.

Background

Australia freshwater lobster is commonly called freshwater lobster, red crayfish or blue lobster, is a new aquatic product variety with great popularization potential, and has the advantages of rich nutrition, tender meat, crisp and smooth meat, and delicious and sweet taste. Australia crayfish is originally produced in a stream in a tropical region in northern Australia, and is called crayfish because it is large in size, looks exactly like a crayfish in the sea, and lives only in fresh water. Compared with other shrimps, the Australia freshwater lobster has many obvious advantages in the aspect of cultivation economic benefit, the weight of an individual is generally 100-200 g, and the maximum individual can reach 500 g. The Australia freshwater lobster is rich in nutrition, high in protein content in the body, extremely low in cholesterol content, strong in stress resistance and wide in adaptability, and the Australia freshwater lobster has high tolerance to severe environment, few diseases, is easy to breed and is resistant to long-distance transportation. As early as the 90 s of the last century, Australia crayfish raised the breeding tide around the world. Australia crayfish in China is introduced by the research institute of aquatic products in Hubei, and is successfully cultured in Guangdong province and Hubei provinces firstly, and then is gradually popularized to Jiangsu province, Hunan province, northern province and the like. However, the problems of insufficient popularization, less investment, low survival rate of the fries and the like are particularly limited by insufficient supply of the fries, and the Australian crayfish culture still does not form a large scale at home at present.

The intensive artificial breeding technology of the Australia crayfish is basically adopted in China, but the current general breeding technology is generally stocking in 4-5 months, harvesting is carried out in 10-11 months, and the yield cannot be greatly improved in one year. Therefore, the Australia crayfish breeding technology in the prior art has the problems of strong dependence on the environment, poor controllability, one-season breeding in one year and low yield, and the crayfish breeding industry needs a method for breeding Australia crayfish with improved yield.

Disclosure of Invention

The invention aims to provide a culture method of Australia crayfish, which has the advantages that the Australia crayfish is bred for two seasons in one year, and the yield is improved.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

The embodiment of the application provides a method for culturing Australia crayfish, which comprises the following steps:

building a breeding pool: firstly, building a shed on a flat ground, building a cement pool in the shed, building a film shed on the cement pool, and installing a temperature regulating device and an oxygenation device in the cement pool;

pretreatment of a breeding pond: planting submerged plants at the bottom of the cement pond 12-16 days before breeding the breeding shrimps, feeding water into the pond body, and disinfecting a water body;

breeding the breeding shrimps: breeding the seed shrimps in a breeding pond, sterilizing the seed shrimps in the breeding pond again, then placing lobster nests in the breeding pond, feeding the seed shrimps by adopting mixed baits of plant baits and animal baits, wherein the water temperature is 18-22 ℃, and changing the water 2-3 times per week;

spawning induction and hatching: slowly raising the water temperature to 26-28 ℃, covering a layer of shading net on the film shed to enable the breeding shrimps to mate naturally, hatching the breeding shrimps separately when the belly of the female shrimp has light yellow eggs to be discharged, transferring the breeding shrimps to a breeding pool where the male shrimp is located after hatching to continue mating breeding, and breeding the shrimp larvae separately.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the invention utilizes the combination of the outermost layer of the shed, the cement pond and the film shed to play a role in three-layer heat preservation, plants submerged in water are planted at the bottom, the water body is disinfected twice to simulate the field living environment of Australia freshwater lobster, the growth and the reproduction of the lobster are facilitated, and the control on the growth, the mating and the induced spawning of the lobster is realized by controlling the water temperature, so that the aim of twice reproduction in one year is fulfilled, and the yield of the lobster is greatly improved.

The mixed bait of the plant bait and the animal bait is adopted for feeding, so that the growth of the Australia crayfish is promoted, and the survival rate is improved.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.

A culture method of Australia crayfish comprises the following steps:

building a breeding pool: firstly, building a winter greenhouse on the level ground, building a cement pond in the winter greenhouse, building a film greenhouse on the cement pond, installing a boiler as a temperature adjusting device in the cement pond, arranging an aerator as an oxygen increasing device, and enabling the temperature and the dissolved oxygen amount in the breeding pond to be constant by adopting a multi-layer heat preservation structure, thereby being beneficial to the survival and breeding of Australia crayfishes;

pretreatment of a breeding pond: planting submerged plants such as elodea nuttallii at the bottom of a cement pool 12-16 days before breeding of the breeding shrimps, feeding water into the pool body, wherein the water depth is 100cm, and disinfecting the water body twice, wherein the elodea nuttallii is a high-quality, fast-growing and high-yield submerged plant, the pollution on the body surface can be completely solved when the lobsters swim on the waterweeds, and the elodea nuttallii has the characteristics of freshness, tenderness and crispness and is natural bait of the lobsters;

breeding the breeding shrimps: selecting excellent parent shrimps as seed shrimps, and putting the seed shrimps into a breeding pond for breeding, wherein the density is 20-30 tails/m²The male-female ratio is 2: 1, sterilizing again after entering a pond, then placing lobster nests in a breeding pond, feeding by adopting mixed baits of plant baits and animal baits, wherein the water temperature is 18-22 ℃, changing water 2-3 times every week, and the water changing amount is 20-30% every time; the parent shrimp is required to have complete limbs, bright shell, plump and active food line, the mass of female shrimp is more than 70g, and the mass of male shrimp is more than 100 g.

Spawning induction and hatching: the lobster hastening parturition is carried out at the bottom of 2 months, the water temperature is slowly increased to 26-28 ℃, the temperature increase range is not more than 2 ℃ every day, the lobsters in the water have time to adapt, and the lobsters have strong inadaptability due to the excessively high temperature increase speed to influence the survival rate; covering a layer of shading net on a film shed, keeping dark light in the shed, enabling the seed shrimps to mate naturally, when the belly of the female shrimp has light yellow eggs to be discharged, lowering the water level in a water tank to 10cm, fishing out the egg-carrying female shrimp by using a net, transferring the egg-carrying female shrimp to an artificial incubator for independent incubation, transferring the male shrimp to another breeding pool, separately breeding the male shrimp and the egg-carrying female shrimp to avoid the influence of the male shrimp on the egg-carrying female shrimp, transferring the female shrimp to the breeding pool where the male shrimp is located after the female shrimp is incubated, mating and breeding again after one month conditioning, so that the male shrimp and the female shrimp can mate and breed again, thereby achieving the effect of breeding the female shrimp twice a year and solving the problem of seed lacking;

shrimp fry cultivation: feeding fairy shrimp 5-7 days after the young shrimp is separated from the parent, wherein the fairy shrimp is high in nutrition and is easy to hatch, feeding opening materials 15 days later, increasing the amount of the opening materials day by day, supplementing the young shrimp with a net sleeve when the young shrimp is sold, oxygenating and packaging with plastic bags, wherein the density of each bag is 1000 tails, and if long-distance transportation needs additional foam boxes and ice cubes, the transportation time is preferably not more than 24 hours.

In some embodiments of the present invention, the growing process of the elodea nuttallii in the breeding pond pretreatment step specifically includes: filling mellow soil in the submerged bottom tray, planting the waterweeds on the mellow soil, and uniformly placing the submerged bottom tray at the bottom of the cement pool, wherein the submerged bottom tray accounts for 1/2-1/4 of the total area of the pool bottom.

In some embodiments of the invention, the inlet water in the breeding pond pretreatment step is filtered by a 100-120 mesh silk net, so that impurities in the water are reduced, and the visibility of the water in the breeding pond is not lower than 30 cm.

In some embodiments of the present invention, the two disinfection operations in the breeding pond pretreatment step are respectively: during the first disinfection, 5mg/L povidone iodine solution is adopted when water is just fed; the secondary disinfection time is 3-5 days before breeding the breeding shrimps, 2mg/L povidone iodine solution is adopted, and the disinfected water body tends to the outdoor living environment of the Australian crayfish, so that the Australian crayfish is favorable for growth and reproduction of the Australian crayfish.

In some embodiments of the invention, 1mg/L povidone-iodine solution is used for sterilization in the breeding step of the shrimps, and the number of lobster nests is 1-2 times that of the shrimps, so that each shrimp is ensured to be sufficiently free.

In some embodiments of the invention, the pool water has dissolved oxygen greater than 5mg/L, ammonia nitrogen content less than 0.8mg/L, nitrite less than 0.06 mg/L.

In some embodiments of the invention, the feeding amount of the mixed baits in the breeding step of the shrimps is 5-8% of the total mass of the shrimps, 30% of the total mass in the morning and 70% of the total mass in the afternoon, the feeding amount can be properly adjusted, the mixed baits are generally eaten after 2 hours after feeding, and the mass ratio of the plant baits to the animal baits in the mixed baits is 1: (2-3).

In some embodiments of the invention, the plant bait comprises carrot, purple sweet potato, corn gluten meal, bean cake, vegetable oil and Chinese medicinal materials, wherein the Chinese medicinal materials comprise angelica dahurica, dried orange peel, cyrtomium rhizome, tuckahoe and radix bupleuri; the animal feed comprises earthworm meat, snail meat, dried small shrimps, fish intestines and fish oil.

In some embodiments of the invention, the number ratio of the female shrimps to the incubator in the induced spawning and hatching step is 1: 1, achieving the conditions of a female shrimp incubator without mutual interference and the environmental conditions in the incubator, wherein the water temperature in the incubator is 31-33 ℃, and the water flow is 2-5 m³The illumination intensity is 1000-2000 Lux, and the illumination time is 10-12 h/day.

In some embodiments of the invention, the feeding amount of the fairy shrimp in the shrimp fry breeding step is 50-100 g/time per square meter of water surface, and the feeding is performed for 1 time in the morning and evening every day, the opening material comprises 30-50% of fish meal, 10-15% of phagostimulant, 25-30% of earthworm powder, 8-10% of vegetable oil, 3-8% of compound vitamins and 3-8% of compound minerals, and the compound vitamins comprise vitamin B2, vitamin B6, vitamin B12, vitamin D and vitamin C; the compound mineral comprises selenium element, calcium element and zinc element.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

A culture method of Australia crayfish comprises the following steps:

building a breeding pool: firstly, building a winter greenhouse with the length and width of 100 multiplied by 12m on a flat ground, building a cement pool with the length, width and depth of 12 multiplied by 8 multiplied by 1.2m in the winter greenhouse, building a film greenhouse on the cement pool, and installing a boiler and an aerator in the cement pool;

pretreatment of a breeding pond: 15 days before breeding shrimps, filling mellow soil with a rectangular submerged tray with the length, width and depth of 80 multiplied by 40 multiplied by 5cm, planting the waterweeds on the mellow soil, and uniformly placing the submerged tray at the bottom of a cement pool, wherein the submerged tray accounts for 1/3 of the total area of the pool bottom; pumping water for external pond culture into a breeding pond, filtering the water inflow through a 100-mesh silk net to form a water depth of 100cm, and then eliminating the water body by adopting 5mg/L povidone iodine solution; keeping the water in the water body pond at 15 ℃, enabling the waterweeds to grow rapidly, and disinfecting the pond water again by adopting 2mg/L povidone iodine solution 3 days before breeding the breeding shrimps;

breeding the breeding shrimps: selecting parent shrimps with complete limbs, bright carapace, plump food line and good vitality as seed shrimps, putting the parent shrimps into a breeding pool for breeding, wherein the mass of female shrimps is more than 70g, the mass of male shrimps is more than 100g, and the density in the breeding pool is 25 tails/m²The male-female ratio is 2: 1, disinfecting by using 1mg/L povidone iodine solution after entering a pond, then placing artificial lobster nest holes in a breeding pond, wherein the number of the nest holes is 1.5 times that of breeding shrimps, feeding by adopting mixed baits of plant baits and animal baits, the feeding amount is 6 percent of the mass of the breeding shrimps, keeping the water temperature at 20 ℃ in the breeding process of the breeding shrimps, changing water 2 times every week, changing the water amount at 20 percent every time, keeping the water quality in the pond fresh, ensuring the visibility to be not less than 30cm, keeping the water in the pond to be more than 5mg/L of dissolved oxygen, less than 0.8mg/L of ammonia nitrogen and less than 0.06mg/L of nitrite.

Spawning induction and hatching: starting to hasten parturition of the lobsters at the bottom of 2 months, slowly heating the water to 28 ℃, wherein the temperature rise range per day is not more than 2 ℃; adding the one deck shading net of covering on the film canopy, keeping darker light in the canopy, letting kind shrimp mate naturally, when the female shrimp belly has light yellow ovum to discharge, with water level drop to 10cm in the pond, take out the female shrimp of embracing the ovum with the hand net, shift to artificial incubator and hatch, the female shrimp is 1 with the quantity ratio of incubator: 1, the water temperature in the incubator is 31 ℃, and the water flow is 2m³The illumination intensity is 1000Lux, and the illumination time is 10 h/day. Transferring the male shrimps to other breeding pools, transferring the female shrimps to the breeding pool where the male shrimps are located after hatching, continuously mating and breeding, and generally carrying out conditioning for one month to mate and breed the male shrimps and the female shrimps again;

shrimp fry cultivation: feeding fairy shrimp after the young shrimp is separated from a parent body 5, wherein the feeding amount of the fairy shrimp is 100 g/time per square meter of water surface, the fairy shrimp is fed for 1 time in the morning and at night every day, the special opening material for the Australia freshwater lobsters is fed after 15 days, the opening material consists of 50% of fish meal, 10% of phagostimulant, 25% of earthworm powder, 8% of vegetable oil, 3% of compound vitamin and 4% of compound mineral, the amount of the opening material is increased day by day, the young shrimp is taken by a net sleeve during sale, and the young shrimp is packaged by a plastic bag in an oxygenated mode, and the density is 1000 tails per bag.

Example 2

A culture method of Australia crayfish comprises the following steps:

building a breeding pool: firstly, building a winter greenhouse with the length and width of 100 multiplied by 12m on a flat ground, building a cement pool with the length, width and depth of 12 multiplied by 8 multiplied by 1.2m in the winter greenhouse, building a film greenhouse on the cement pool, and installing a boiler and an aerator in the cement pool;

pretreatment of a breeding pond: 16 days before breeding shrimps, filling mellow soil with a rectangular submerged tray with the length, width and depth of 80 multiplied by 40 multiplied by 5cm, planting the waterweeds on the mellow soil, and uniformly placing the submerged tray at the bottom of a cement pool, wherein the submerged tray accounts for 1/2 of the total area of the pool bottom; pumping water for external pond culture into a breeding pond, filtering the water inflow through a 100-mesh silk net to form a water depth of 100cm, and then eliminating the water body by adopting 5mg/L povidone iodine solution; keeping the water in the water body pond at 15 ℃, enabling the waterweeds to grow rapidly, and disinfecting the pond water again by adopting 2mg/L povidone iodine solution 3 days before breeding the breeding shrimps;

breeding the breeding shrimps: selecting parent shrimps with complete limbs, bright carapace, plump food line and good vitality as seed shrimps, putting the parent shrimps into a breeding pool for breeding, wherein the mass of female shrimps is more than 70g, the mass of male shrimps is more than 100g, and the density in the breeding pool is 30 tails/m²The male-female ratio is 2: 1, disinfecting by using 1mg/L povidone iodine solution after entering a pond, then placing artificial lobster nest holes in a breeding pond, wherein the number of the nest holes is 2 times that of breeding shrimps, feeding by adopting mixed baits of plant baits and animal baits, the feeding amount is 8 percent of the mass of the breeding shrimps, keeping the water temperature at 18 ℃ in the breeding process of the breeding shrimps, changing water 2 times every week, changing the water amount at 30 percent every time, keeping the water quality in the pond fresh, ensuring the visibility to be not less than 30cm, keeping the dissolved oxygen in the pond water to be more than 5mg/L, keeping the ammonia nitrogen to be less than 0.8mg/L and keeping the nitrite to be less than 0.06 mg/L.

Spawning induction and hatching: starting to hasten parturition of the lobsters at the bottom of 2 months, slowly raising the water temperature to 26 ℃, wherein the temperature rise range per day is not more than 2 ℃; covering a shading net on the film shed to keep dark light in the shed for natural mating of the female shrimps, and lowering water level in the pond when the eggs on the abdomen of the female shrimps are dischargedAnd (3) fishing out the egg-carrying female shrimps by using a hand net until the egg-carrying female shrimps reach 10cm, transferring the egg-carrying female shrimps to an artificial incubator for incubation, wherein the number ratio of the female shrimps to the incubator is 1: 1, the water temperature in the incubator is 33 ℃, and the water flow is 5m³The illumination intensity is 2000Lux, and the illumination time is 12 h/day. Transferring the male shrimps to other breeding pools, transferring the female shrimps to the breeding pool where the male shrimps are located after hatching, continuously mating and breeding, and generally carrying out conditioning for one month to mate and breed the male shrimps and the female shrimps again;

shrimp fry cultivation: feeding fairy shrimp after the shrimp larvae are separated from a parent body 7, wherein the feeding amount of the fairy shrimp is 80 g/time per square meter of water surface, the fairy shrimp is respectively fed for 1 time in the morning and evening every day, the special opening material for the Australia freshwater lobster is fed after 15 days, the opening material consists of 30% of fish meal, 15% of phagostimulant, 30% of earthworm powder, 10% of vegetable oil, 7% of compound vitamin and 8% of compound mineral, the amount of the opening material is gradually increased day by day, the shrimp larvae are taken out by a net sleeve during sale, the shrimp larvae are packaged by a plastic bag in an oxygenated mode, and the density is 1000 tails per bag.

Example 3

A culture method of Australia crayfish comprises the following steps:

building a breeding pool: firstly, building a winter greenhouse with the length and width of 100 multiplied by 12m on a flat ground, building a cement pool with the length, width and depth of 12 multiplied by 8 multiplied by 1.2m in the winter greenhouse, building a film greenhouse on the cement pool, and installing a boiler and an aerator in the cement pool;

pretreatment of a breeding pond: filling mellow soil with a rectangular submerged tray with the length, width and depth of 80 multiplied by 40 multiplied by 5cm 12 days before breeding of the breeding shrimps, planting the elodea nutans on the mellow soil, and uniformly placing the submerged tray at the bottom of a cement pool, wherein the submerged tray accounts for 1/4 of the total area of the pool bottom; pumping water for external pond culture into a breeding pond, filtering the water inflow through a 100-mesh silk net to form a water depth of 100cm, and then eliminating the water body by adopting 5mg/L povidone iodine solution; keeping the water in the water body pond at 15 ℃, enabling the waterweeds to grow rapidly, and disinfecting the pond water again by adopting 2mg/L povidone iodine solution 3 days before breeding the breeding shrimps;

breeding the breeding shrimps: selecting parent shrimps with complete limbs, bright carapace, plump food line and good vitality as seed shrimps, placing the seed shrimps into a breeding pond for breeding, and obtaining the quality of female shrimp individualsThe amount is more than 70g, the mass of the male shrimp is more than 100g, and the density in the breeding pond is 20 tails/m²The male-female ratio is 2: 1, disinfecting by using 1mg/L povidone iodine solution after entering a pond, then placing artificial lobster nest holes in a breeding pond, wherein the number of the nest holes is 2 times of that of breeding shrimps, feeding by adopting mixed baits of plant baits and animal baits, the feeding amount is 5 percent of the mass of the breeding shrimps, keeping the water temperature at 22 ℃ in the breeding process of the breeding shrimps, changing water 3 times every week, changing the water amount at 30 percent every time, keeping the water quality in the pond fresh, ensuring the visibility to be not less than 30cm, keeping the dissolved oxygen in the pond water to be more than 5mg/L, keeping the ammonia nitrogen below 0.8mg/L and the nitrite below 0.06 mg/L.

Spawning induction and hatching: starting to hasten parturition of the lobsters at the bottom of 2 months, slowly heating the water to 28 ℃, wherein the temperature rise range per day is not more than 2 ℃; adding the one deck shading net of covering on the film canopy, keeping darker light in the canopy, letting kind shrimp mate naturally, when the female shrimp belly has light yellow ovum to discharge, with water level drop to 10cm in the pond, take out the female shrimp of embracing the ovum with the hand net, shift to artificial incubator and hatch, the female shrimp is 1 with the quantity ratio of incubator: 1, the water temperature in the incubator is 32 ℃, and the water flow is 3m³The illumination intensity is 1500Lux, and the illumination time is 11 h/day. Transferring the male shrimps to other breeding pools, transferring the female shrimps to the breeding pool where the male shrimps are located after hatching, continuously mating and breeding, and generally carrying out conditioning for one month to mate and breed the male shrimps and the female shrimps again;

shrimp fry cultivation: feeding fairy shrimp after the young shrimp is separated from a parent body 5, wherein the feeding amount of the fairy shrimp is 100 g/time per square meter of water surface, the fairy shrimp is fed for 1 time in the morning and at night every day, the special opening material for the Australia freshwater lobsters is fed after 15 days, the opening material consists of 40% of fish meal, 12% of phagostimulant, 25% of earthworm powder, 10% of vegetable oil, 8% of compound vitamin and 5% of compound mineral substances, the amount of the opening material is increased day by day, the young shrimp is taken by a net sleeve during sale, and the young shrimp is packaged by a plastic bag in an oxygenated mode, and the density is 1000 tails per bag.

Example 4

The embodiment researches the influence of shading on mating of the breeding shrimps, namely the experimental group and the control group are only different in whether shading treatment is carried out by using a shading net in the induced spawning and hatching step, and other treatments are consistent, and experiments show that the egg laying rate of the breeding shrimps subjected to shading treatment after 10 days and 15 days is higher than that of the breeding shrimps not subjected to shading treatment. Therefore, the environment condition of shading treatment can promote the mating of the Australia freshwater lobster after the water temperature rises to reach the mating temperature.

Example 5

This example explores the effect of feed type on the growth of Australian crayfish during the breeding step.

This embodiment sets up 5 experiment groups, and wherein experiment group 1 adopts plant bait entirely, and the proportion of plant bait and animal bait is 1 in experiment group 2: 1, the ratio of plant feed to animal feed in the experimental group 3 was 1: 2, the ratio of plant feed to animal feed in the experimental group 4 was 1: 3, the ratio of the plant baits to the animal baits in the experimental group 5 is 1: and 4, simultaneously setting a control group, wherein the lobsters of the control group adopt common lobster feed in the market. The 5 experimental and control groups of Australian crayfish were fed separately with the same plant and animal feeds as in example 1 under the same environmental conditions. The growth performance of the Australian crayfish was measured 4 weeks later, and the measurement results are shown in Table 1.

TABLE 1 Effect of different feeds on Australia crayfish

As can be seen from table 1, the weight of lobsters in the experimental group 1 (whole plant feed) was rather reduced compared to the control group, and the food consumption was 67.2% after 2h feeding, and the survival rate of lobsters was low; with the increase of the specific gravity of the animal feed in the feed, the weight gain rate, the survival rate and the food consumption rate of the Australian crayfish are all increased and are higher than those of a control group (common feed), so that the ratio of the plant feed to the animal feed is 1: (1-4) the lobster feed is more suitable for the growth of lobsters, particularly, the effect of the experimental groups 3, 4 and 5 is better, but the plant bait content of the experimental group 5 is reduced, and the color of the lobster shells is not as red as that of other experimental groups. Therefore, in summary, the ratio of plant feed to animal feed is 1: (2-3) the most preferable.

In 2019, the method is tested in the professional cooperation of Wuhe county breeding, and in 2019, in 1 month, male shrimps are: 1 part of female shrimps: 2, putting the seed shrimps, breeding for one season in March and breeding for the second season in September, and producing 30 thousand of seedlings in total to produce 250 jin/mu of shrimps, wherein the yield value is 1.5 ten thousand yuan/mu, which is multiplied compared with the previous year.

In conclusion, the Australian freshwater lobster breeding method provided by the invention has the advantages that the effect of three-layer heat preservation is achieved by combining the winter warm shed, the cement pond and the film shed, the Ile algae is planted at the water bottom, the water body is disinfected twice to simulate the field living environment of the Australian freshwater lobsters, the growth and the propagation of the lobsters are facilitated, the control on the growth, the mating and the induced spawning of the lobsters is realized by controlling the water temperature, the purpose of twice propagation in one year is achieved, and the yield of the lobsters is greatly improved.

The mixed bait of the plant bait and the animal bait is adopted for feeding, so that the growth of the Australia crayfish is promoted, and the survival rate is improved.

The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.