CN102499158B - High-density industrial seed culture method for freshwater shrimps - Google Patents
High-density industrial seed culture method for freshwater shrimps Download PDFInfo
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Abstract
The invention relates to a high-density industrial seed culture method for freshwater shrimps. The method is characterized in that firstly, enough freshwater shrimps with basically synchronous embryonic development are placed in an incubation screen box at one step, and lay a great amount of seeds together, the shrimp seeds achieve required density within a short time, uniformity of the ages and the specifications of the shrimp seeds is guaranteed, and cultivation density and survival rate of the shrimp seeds can be effectively improved; secondly, commercial bait and local biological bait are used sufficiently, and the commercial bait including feed and shrimp cracks and the like not only is complete in nutrition, but also seldom affects water quality, as a great quantity of local biological bait is used, fast growth of the shrimp seeds is guaranteed, cost is further saved effectively, the shrimp seeds are fed by a small quantity of bait at a time but are fed by multiple times in a day, nutrition needs of the shrimp seeds are met assuredly, waste of the bait is also reduced, and pollution to cultivation water and seed culture cost are effectively reduced; and thirdly, water quality and bottom materials are adjusted, seed culture water is filled into a pond after being filtered via a net bag with certain meshes, water replacement frequency is increased gradually during seed culture, and a good water quality environment is guaranteed. The high-density industrial seed culture method is high in cultivation density and survival rate, low in cost and convenient in operation, and has a high popularization value.
Description
Technical field
The present invention relates to a kind of high-density industrial seed culture method for freshwater shrimps.
Technical background
Freshwater shrimp has another name called river prawn, and formal name used at school Japanese macrobrachium supernbum is under the jurisdiction of Arthropoda, Crustachia, Palaemonidae, and pond crayfish belongs to, and is Japan and Chinese distinctive Freshwater shrimps.In China, freshwater shrimp is extensively distributed in the rivers, lake of various places, north and south, freshwater shrimp strong adaptability, there is omnivorousness, the culture-cycle is short, fertility is strong, nutritious, market price high, the famous and precious aquatic products that welcome by consumers in general, and can export goods and earn foreign currency, thereby it is a rising aquaculture kind.Wherein Baiyang Lake freshwater shrimp shell is thin, meat is tender, stingless, the delicious flavour of raw meat not, is described as in history one of three famous large famous and precious freshwater shrimps of China.But in recent years along with the variation of shallow lake district water level, and overfishing, freshwater shrimp resource is sharply declined.For this improved seeds resource is restored, conservation of nature water area ecological environment, promotes shrimp culture industrialization, increases fisherman's income, and the research of carrying out freshwater shrimp batch production rearing of fingerling has important practical significance.
The domestic report about freshwater shrimp seed breeding is a lot of at present, is mostly to concentrate on seedling rearing in earth ponds and net cage seedling nursery aspect, and less about the report of freshwater shrimp batch production seed breeding.Seedling rearing in earth ponds belongs to a kind of extensive seedling raising manners, and its advantage is that cost is lower, simple to operate, less demanding to breeding condition, but its shortcoming is that seed rearing condition is wayward, seed density is little, survival rate is low, is not suitable for large-scale seed breeding.Net cage seedling nursery is compared with seedling rearing in earth ponds, and technical requirement and cost are higher, and cultivation density and the survival rate of seed are also higher, but is that seed rearing condition is wayward equally, and seed density and survival rate also do not reach the requirement of extensive seed breeding.
Due to freshwater shrimp, to have strong adaptability, omnivorousness, culture-cycle short, price advantages of higher, and being subject to gradually culturist must favor, and cultured area expands gradually.At the end of the nineties, started some explorations of the batch production rearing of fingerling of freshwater shrimp, and even to this day, the research report of this respect is also few.From the data of correlative study, the density of freshwater shrimp batch production seed rearing many at every cube of water body several ten thousand between 100,000 tails, survival rate 10-30%, or person is lower; Compared with seawater prawn factorial seedling growth, cultivation density and the survival rate of seed are generally on the low side, and effect is not very good.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high-density industrial seed culture method for freshwater shrimps that density is high and survival rate is high of cultivating.
The present invention solves the problems of the technologies described above taked technical scheme:
A kind of high-density industrial seed culture method for freshwater shrimps, it comprises the steps:
(1) close shrimp screening: the long 5cm of screen body above, the shrimp with ovums of complete, the active stalwartness of appendage is as close shrimp;
(2) support temporarily: above-mentioned close shrimp is put into 20 orders/cm
2support in net cage temporarily, making close shrimp density is 1-1.5kg/m
3support temporarily placement pasture and water in net cage, pasture and water coverage rate 15-30%, the above-mentioned net cage of supporting is temporarily suspended in cement pit, makes the water level of supporting temporarily in net cage remain on 40～50cm, to the cube meat of supporting temporarily the trash fish of throwing something and feeding in net cage, shrimp and being cut into, prevent that close shrimp from nibbling mutually, early morning every day and respectively throwing something and feeding once at dusk, feeding volume is the 2-3% of close shrimp weight, every day quantity of exchanged water 1/2;
(3) hatching and cloth seedling: described close shrimp is put into 20 orders/cm when large and clear when ovum grain presents cinerous, transparent, eyespot
2incubation net cage in, the density that makes close shrimp is 4-9 kg/m
3, above-mentioned incubation net cage is hung in nursery pond, make depth of water 30-40cm in net cage, in net cage, put into pasture and water, pasture and water coverage rate 20～30%, the not bait throwing in of close shrimp in incubation net cage; When the shrimp seedling in nursery pond reaches 35-45 ten thousand/m
3, described incubation net cage is moved into another nursery pond and carries out cloth seedling; Described nursery pond changes water once, quantity of exchanged water 1/5-3/10 every day;
(4) seed rearing: the shrimp seedling in nursery pond is started to throw something and feed after incubation net cage is shifted out to nursery pond, its feeding method is: throw something and feed No. 0, spirulina powder and car unit of the first phase young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.01～0.02g/ ten thousand tail shrimp seedlings, 0.01～the 0.02g/ of car unit, ten thousand tail shrimp seedlings, all 200 order silk cover filterings; Second phase throw something and feed No. 1, spirulina powder and car unit of the young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.015～0.03g/ ten thousand tail shrimp seedlings, 0.015～0.03g/, ten thousand tail shrimp seedlings, 200 orders are thrown something and fed after filtering; Three phase phase to five young take the prawn slice of throwing something and feeding as main, auxiliary a small amount of freshwater rotifer of throwing something and feeding, prawn slice are thrown something and fed once every 2～3h, each feeding volume 0.04～0.06g/ ten thousand tail shrimp seedlings, 100 order silk cover filterings, wheel animalcule 10～30/ml of the density water body of throwing something and feeding, every day is early, respectively throw something and feed once evening, must be through glutaraldehyde sterilization and Vc fortification before throwing something and feeding; Six phase phase to seven young throw something and feed chilled cladocera and prawn slice, throw something and feed once every 2h, and chilled cladocera is thrown something and fed 10 times every day, each feeding volume 0.24-0.28g/ ten thousand tail shrimp seedlings, and cladocera needs before throwing something and feeding to strengthen through terramycin sterilization and Vc.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.09-0.14g/ ten thousand tail shrimp seedlings, and 60 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands; Eight the phase young to the young shrimp of 1.5cm the throw something and feed cladocera, prawn slice and the self-control artitificial food that dry, throw something and feed once every 2h, the cladocera drying is thrown something and fed 8 times every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, the cladocera drying must be through terramycin sterilization and Vc strengthening, prawn slice are thrown something and fed 2 times every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, 40 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands, self-control artitificial food is the egg custard that freshwater mussel meat, shrimp and duck's egg are made, throw something and feed twice every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, throw something and feed after 40 mesh sieve thin,tough silk strandings are broken.
The porch of described nursery pond is provided with polyethylene filtering mesh bag, and its order is several to be determined according to shrimp seedling size: first phase is to the second stage of young, and order number is 200 orders/cm
2; Three phase phase to five young, order number is 100 orders/cm
2; After six phases, order number is 60 orders/cm
2.
The beneficial effect that the present invention adopts technique scheme to obtain: adopt the inventive method to carry out freshwater shrimp factorial seedling growth, through the seed rearing of nearly 30 days, young shrimp body length can reach 1.0-1.5cm, cultivated density and reached 15-20 ten thousand tails/m3, survival rate is up to 42.2%, and cost is 5.8 yuan/ten thousand tails only.Within 2011, grow seedlings one batch, 288m
3water body is cultivated young shrimp 5,100 ten thousand tails altogether.Traditional seedling rearing in earth ponds, how the young shrimp of 1.0cm cultivates density at 0.1-0.5 ten thousand/m
3scope in, survival rate 10%-20%, cost 15-30 unit/ten thousand tail.Adopt raising in cage, the cultivation density of 1.0 young shrimps is many at 3000-5000 tail/m
3scope in, the about 15-30% of survival rate, cost 50-100 unit/ten thousand tail.Therefore, compare with net cage seedling nursery with seedling rearing in earth ponds, in this research, freshwater shrimp seed rearing density and survival rate will exceed 2-3 doubly, and produce the costs of the young shrimps of every ten thousand tails will low 3-17 doubly.Key point of the present invention have following some: one, close shrimp hatching, cloth seedling, in incubation net cage, once put into close shrimp enough, embryonic development basic synchronization, make close shrimp concentrate a large amount of row's seedlings, in short time, shrimp seedling meets the requirements of density, guarantee the unification of shrimp seedling age in days and specification, can effectively improve cultivation density and the survival rate of young shrimp.Two, abundant commodity in use bait and local biological feed, the not only comprehensive nutritions of commercialization bait such as car unit and prawn slice, and also little to water quality impact; A large amount of uses of local biological feed, can guarantee that shrimp seedling grows fast, also can be effectively cost-saving; And in bait feeding process, follow a small amount of principle repeatedly, and both guaranteed the nutritional need of shrimp seedling, also reduce bait waste, effectively reduce pollution and seedling cost to breeding water body.Three, water quality and substrate regulate, and grow seedlings to cultivate after water filters by the mesh bag of certain order number to enter pond, have stopped that pest and foreign material enter, and also bring abundant food organisms into.Between nursery stage, strengthen gradually quantity of exchanged water, guaranteed good water quality environment.In substrate, introduce water silk earthworm, water silk earthworm amount reproduction at the bottom of pond has improved bottom environment effectively, in whole seedling raising process, does not find the phenomenon of ruining at the bottom of pond.The present invention is that a kind of seed rearing density is high, survival rate is high, cost is low, the practical technique of convenient operation, has higher promotional value.
Embodiment
Embodiment 1
The present embodiment comprises the following steps:
1, close shrimp screening: the long 5cm of screen body above, the shrimp with ovums of the Baiyang Lake freshwater shrimp of complete, the active stalwartness of appendage is as close shrimp;
2, support temporarily: above-mentioned close shrimp is put into and supports temporarily net cage, and supporting net cage is temporarily 20 orders/cm
2, big or small 2m × 2m × 1m polyethylene net cage, the each temporary adopted parents shrimp of net cage 4kg that supports temporarily, support temporarily placement pasture and water in net cage, pasture and water coverage rate 15%, the above-mentioned net cage of supporting is temporarily suspended in 4m × 6m × 1.5m cement pit, each cement pit hangs puts two temporarily foster net cages, the water level of supporting in net cage temporarily remains on 40～50cm, to the cube meat of supporting temporarily the trash fish of throwing something and feeding in net cage, shrimp and being cut into, prevent that close shrimp from nibbling mutually, early morning every day and respectively throwing something and feeding once at dusk, feeding volume is 2% of close shrimp weight, every day quantity of exchanged water 1/2;
3, hatching and cloth seedling: described close shrimp is put into incubation net cage when ovum grain presents cinerous, transparent, eyespot when large and clear, incubation net cage is 20 orders/cm
2, specification 1.5m × 4m × 0.75m, hangs in the nursery pond of 4m × 6m × 1.5m, makes depth of water 30-40cm in net cage, and nursery pond is cement pit, and the dark 90～110cm of pool inner water, changes water every day once, quantity of exchanged water 1/5.Nursery pond water inlet cover polyethylene filtering mesh bag, stops that foreign material and some pests enter in pond, puts into pasture and water in net cage, pasture and water coverage rate 20%, and the not bait throwing in of close shrimp in incubation net cage, the close shrimp gross weight in each incubation net cage is 20kg; When the shrimp seedling in nursery pond reaches 35-45 ten thousand/m
3, described incubation net cage is moved into another nursery pond and carries out cloth seedling;
4, seed rearing: the shrimp seedling in nursery pond is started to throw something and feed after incubation net cage is shifted out to nursery pond, its feeding method is: throw something and feed No. 0, spirulina powder and car unit of the first phase young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.01g/ ten thousand tail shrimp seedlings, the car 0.015g/ of unit ten thousand tail shrimp seedlings, all 200 order silk cover filterings; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 0 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Second phase throw something and feed No. 1, spirulina powder and car unit of the young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.03g/ ten thousand tail shrimp seedlings, 0.02g/ ten thousand tail shrimp seedlings, 200 orders are thrown something and fed after filtering; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 1 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Three phase phase to five young take the prawn slice of throwing something and feeding as main, auxiliary a small amount of freshwater rotifer of throwing something and feeding.Prawn slice are thrown something and fed once every 3h, each feeding volume 0.06g/ ten thousand tail shrimp seedlings, 100 order silk cover filterings.Wheel animalcule 20/ml of the density water body of throwing something and feeding, every day early, respectively throw something and feed once evening, must be through glutaraldehyde sterilization and Vc fortification before throwing something and feeding.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 100 orders/cm
2.Six phase phase to seven young take the chilled cladocera of throwing something and feeding as main, collocation some prawn slice of throwing something and feeding, throw something and feed once every 2h, throw something and feed 10 times in chilled cladocera sky, each feeding volume 0.24g/ ten thousand tail shrimp seedlings, cladocera needs before throwing something and feeding to strengthen through terramycin sterilization and Vc.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.14g/ ten thousand tail shrimp seedlings, and 60 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.The eight phase cladoceras that dry to throw something and feed to the young shrimp of 1.5cm of the young are as main, and auxiliary prawn slice and the self-control artitificial food of throwing something and feeding, throws something and feeds once every 2h.The cladocera drying is thrown something and fed 8 times every day, each feeding volume 0.35g/ ten thousand tail shrimp seedlings, and the cladocera drying must be through terramycin sterilization and Vc strengthening.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.25g/ ten thousand tail shrimp seedlings, and 40 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands, and prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Self-control artitificial food is the egg custard that freshwater mussel meat, shrimp (take Freshwater Shrimp Exopalaemon modestus as main) and duck's egg are made, and throws something and feeds twice every day, and each feeding volume 0.17g/ ten thousand tail shrimp seedlings are thrown something and fed after 40 mesh sieve thin,tough silk strandings are broken.Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.
Embodiment 2
The present embodiment comprises the following steps:
1, close shrimp screening: the long 5cm of screen body above, the shrimp with ovums of the Baiyang Lake freshwater shrimp of complete, the active stalwartness of appendage is as close shrimp;
2, support temporarily: above-mentioned close shrimp is put into and supports temporarily net cage, and supporting net cage is temporarily 20 orders/cm
2, big or small 2m × 2m × 1m polyethylene net cage, the each temporary adopted parents shrimp of net cage 5kg that supports temporarily, support temporarily placement pasture and water in net cage, pasture and water coverage rate 30%, the above-mentioned net cage of supporting is temporarily suspended in 4m × 6m × 1.5m cement pit, each cement pit hangs puts two temporarily foster net cages, the water level of supporting in net cage temporarily remains on 40～50cm, to the cube meat of supporting temporarily the trash fish of throwing something and feeding in net cage, shrimp and being cut into, prevent that close shrimp from nibbling mutually, early morning every day and respectively throwing something and feeding once at dusk, feeding volume is 3% of close shrimp weight, every day quantity of exchanged water 1/2;
3, hatching and cloth seedling: described close shrimp is put into incubation net cage when ovum grain presents cinerous, transparent, eyespot when large and clear, incubation net cage is 20 orders/cm
2, specification 1.5m × 4m × 0.75m, hangs in nursery pond, makes depth of water 30-40cm in net cage, the cement pit that nursery pond is 4m × 6m × 1.5m, and between nursery stage, the dark 90～110cm of pool inner water, changes water every day once, quantity of exchanged water 3/10.Water inlet cover polyethylene filtering mesh bag, stops that foreign material and some pests enter in pond, puts into pasture and water in net cage, pasture and water coverage rate 30%, and the not bait throwing in of close shrimp in incubation net cage, the close shrimp gross weight in each incubation net cage is 40kg; When the shrimp seedling in nursery pond reaches 35-45 ten thousand/m
3, described incubation net cage is moved into another nursery pond and carries out cloth seedling;
4, seed rearing: the shrimp seedling in nursery pond is started to throw something and feed after incubation net cage is shifted out to nursery pond, its feeding method is: throw something and feed No. 0, spirulina powder and car unit of the first phase young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.015g/ ten thousand tail shrimp seedlings, the car 0.02g/ of unit ten thousand tail shrimp seedlings, all 200 order silk cover filterings; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 0 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Second phase throw something and feed No. 1, spirulina powder and car unit of the young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.015g/ ten thousand tail shrimp seedlings, 0.03g/ ten thousand tail shrimp seedlings, 200 orders are thrown something and fed after filtering; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 1 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Three phase phase to five young take the prawn slice of throwing something and feeding as main, auxiliary a small amount of freshwater rotifer of throwing something and feeding.Prawn slice are thrown something and fed once every 2h, each feeding volume 0.05g/ ten thousand tail shrimp seedlings, 100 order silk cover filterings.Wheel animalcule 10/ml of the density water body of throwing something and feeding, every day early, respectively throw something and feed once evening, must be through glutaraldehyde sterilization and Vc fortification before throwing something and feeding.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 100 orders/cm
2.Six phase phase to seven young take the chilled cladocera of throwing something and feeding as main, collocation some prawn slice of throwing something and feeding, throw something and feed once every 2h, throw something and feed 10 times in chilled cladocera sky, each feeding volume 0.28g/ ten thousand tail shrimp seedlings, cladocera needs before throwing something and feeding to strengthen through terramycin sterilization and Vc.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.12g/ ten thousand tail shrimp seedlings, and 60 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.The eight phase cladoceras that dry to throw something and feed to the young shrimp of 1.5cm of the young are as main, and auxiliary prawn slice and the self-control artitificial food of throwing something and feeding, throws something and feeds once every 2h.The cladocera drying is thrown something and fed 8 times every day, each feeding volume 0.25g/ ten thousand tail shrimp seedlings, and the cladocera drying must be through terramycin sterilization and Vc strengthening.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.17g/ ten thousand tail shrimp seedlings, and 40 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands, and prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Self-control artitificial food is the egg custard that freshwater mussel meat, shrimp (take Freshwater Shrimp Exopalaemon modestus as main) and duck's egg are made, and throws something and feeds twice every day, and each feeding volume 0.35g/ ten thousand tail shrimp seedlings are thrown something and fed after 40 mesh sieve thin,tough silk strandings are broken.Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.
Embodiment 3
The present embodiment comprises the following steps:
1, close shrimp screening: the long 5cm of screen body above, the shrimp with ovums of the freshwater shrimp of complete, the active stalwartness of appendage is as close shrimp;
2, support temporarily: above-mentioned close shrimp is put into and supports temporarily net cage, and supporting net cage is temporarily 20 orders/cm
2, big or small 2m × 2m × 1m polyethylene net cage, the each temporary adopted parents shrimp of net cage 6kg that supports temporarily, support temporarily placement pasture and water in net cage, pasture and water coverage rate 20%, the above-mentioned net cage of supporting is temporarily suspended in 4m × 6m × 1.5m cement pit, each cement pit hangs puts two temporarily foster net cages, the water level of supporting in net cage temporarily remains on 40～50cm, to the cube meat of supporting temporarily the trash fish of throwing something and feeding in net cage, shrimp and being cut into, prevent that close shrimp from nibbling mutually, early morning every day and respectively throwing something and feeding once at dusk, feeding volume is 2.5% of close shrimp weight, every day quantity of exchanged water 1/2;
3, hatching and cloth seedling: described close shrimp is put into incubation net cage when ovum grain presents cinerous, transparent, eyespot when large and clear, incubation net cage is 20 orders/cm
2, specification 1.5m × 4m × 0.75m, hangs in nursery pond, makes depth of water 30-40cm in net cage, the cement pit that nursery pond is 4m × 6m × 1.5m, and the dark 90～110cm of pool inner water, changes water every day once, quantity of exchanged water 1/4.Water inlet cover polyethylene filtering mesh bag, stops that foreign material and some pests enter in pond, puts into pasture and water in net cage, pasture and water coverage rate 25%, and the not bait throwing in of close shrimp in incubation net cage, the close shrimp gross weight in each incubation net cage is 30kg; When the shrimp seedling in nursery pond reaches 35-45 ten thousand/m
3, described incubation net cage is moved into another nursery pond and carries out cloth seedling;
4, seed rearing: the shrimp seedling in nursery pond is started to throw something and feed after incubation net cage is shifted out to nursery pond, its feeding method is: throw something and feed No. 0, spirulina powder and car unit of the first phase young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.02g/ ten thousand tail shrimp seedlings, car unit No. 0 0.01/ ten thousand tail shrimp seedling, all 200 order silk cover filterings; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 0 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Second phase throw something and feed No. 1, spirulina powder and car unit of the young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.02g/ ten thousand tail shrimp seedlings, No. 1 0.015g/ ten thousand tail shrimp seedlings of car unit, 200 orders are thrown something and fed after filtering; Spirulina powder is Shandong Dongying Kang Rui scientific and technological development Co., Ltd product, and car unit is for No. 1 the product of " HIGASHIMARU " Co., Ltd. of Japan.Now nursery pond water inlet polyethylene filtering mesh bag order number is 200 orders/cm
2.Three phase phase to five young take the prawn slice of throwing something and feeding as main, auxiliary a small amount of freshwater rotifer of throwing something and feeding.Prawn slice are thrown something and fed once every 2h, each feeding volume 0.04g/ ten thousand tail shrimp seedlings, 100 order silk cover filterings.Wheel animalcule 30/ml of the density water body of throwing something and feeding, every day early, respectively throw something and feed once evening, must be through glutaraldehyde sterilization and Vc fortification before throwing something and feeding.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 100 orders/cm
2.Six phase phase to seven young take the chilled cladocera of throwing something and feeding as main, collocation some prawn slice of throwing something and feeding, throw something and feed once every 2h, throw something and feed 10 times in chilled cladocera sky, each feeding volume 0.26g/ ten thousand tail shrimp seedlings, cladocera needs before throwing something and feeding to strengthen through terramycin sterilization and Vc.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.09g/ ten thousand tail shrimp seedlings, and 60 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands.Prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.The eight phase cladoceras that dry to throw something and feed to the young shrimp of 1.5cm of the young are as main, and auxiliary prawn slice and the self-control artitificial food of throwing something and feeding, throws something and feeds once every 2h.The cladocera drying is thrown something and fed 8 times every day, each feeding volume 0.17g/ ten thousand tail shrimp seedlings, and the cladocera drying must be through terramycin sterilization and Vc strengthening.Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.35g/ ten thousand tail shrimp seedlings, and 40 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands, and prawn slice are the red woods board prawn special feed of starfish international corporation of the U.S..Self-control artitificial food is the egg custard that freshwater mussel meat, shrimp (take Freshwater Shrimp Exopalaemon modestus as main) and duck's egg are made, and throws something and feeds twice every day, and each feeding volume 0.25g/ ten thousand tail shrimp seedlings are thrown something and fed after 40 mesh sieve thin,tough silk strandings are broken.Now nursery pond water inlet polyethylene filtering mesh bag order number is 60 orders/cm
2.
Claims (2)
1. a high-density industrial seed culture method for freshwater shrimps, is characterized in that it comprises the steps:
(1) close shrimp screening: the long 5cm of screen body above, the shrimp with ovums of complete, the active stalwartness of appendage is as close shrimp;
(2) support temporarily: above-mentioned close shrimp is put into 20 orders/cm
2support in net cage temporarily, making close shrimp density is 1-1.5kg/m
3support temporarily placement pasture and water in net cage, pasture and water coverage rate 15-30%, the above-mentioned net cage of supporting is temporarily suspended in cement pit, makes the water level of supporting temporarily in net cage remain on 40～50cm, to the cube meat of supporting temporarily the trash fish of throwing something and feeding in net cage, shrimp and being cut into, prevent that close shrimp from nibbling mutually, early morning every day and respectively throwing something and feeding once at dusk, feeding volume is the 2-3% of close shrimp weight, every day quantity of exchanged water 1/2;
(3) hatching and cloth seedling: described close shrimp is put into 20 orders/cm when large and clear when ovum grain presents cinerous, transparent, eyespot
2incubation net cage in, the density that makes close shrimp is 4-9 kg/m
3, above-mentioned incubation net cage is hung in nursery pond, make depth of water 30-40cm in net cage, in net cage, put into pasture and water, pasture and water coverage rate 20～30%, the not bait throwing in of close shrimp in incubation net cage; When the shrimp seedling in nursery pond reaches 35-45 ten thousand/m
3, described incubation net cage is moved into another nursery pond and carries out cloth seedling; Described nursery pond changes water once, quantity of exchanged water 1/5-3/10 every day;
(4) seed rearing: the shrimp seedling in nursery pond is started to throw something and feed after incubation net cage is shifted out to nursery pond, its feeding method is: throw something and feed No. 0, spirulina powder and car unit of the first phase young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.01～0.02g/ ten thousand tail shrimp seedlings, 0.01～the 0.02g/ of car unit, ten thousand tail shrimp seedlings, all 200 order silk cover filterings; Second phase throw something and feed No. 1, spirulina powder and car unit of the young, throw something and feed once every 3h, each feeding volume: spirulina powder 0.015～0.03g/ ten thousand tail shrimp seedlings, No. 1 0.015～0.03g/, ten thousand tail shrimp seedlings of car unit, 200 orders are thrown something and fed after filtering; Three phase phase to five young take the prawn slice of throwing something and feeding as main, auxiliary a small amount of freshwater rotifer of throwing something and feeding, prawn slice are thrown something and fed once every 2～3h, each feeding volume 0.04～0.06g/ ten thousand tail shrimp seedlings, 100 order silk cover filterings, wheel animalcule 10～30/ml of the density water body of throwing something and feeding, every day is early, respectively throw something and feed once evening, must be through glutaraldehyde sterilization and Vc fortification before throwing something and feeding; Six phase phase to seven young throw something and feed chilled cladocera and prawn slice, throw something and feed once every 2h, and chilled cladocera is thrown something and fed 10 times every day, each feeding volume 0.24-0.28g/ ten thousand tail shrimp seedlings, and cladocera needs before throwing something and feeding to strengthen through terramycin sterilization and Vc; Prawn slice are thrown something and fed 2 times every day, each feeding volume 0.09-0.14g/ ten thousand tail shrimp seedlings, and 60 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands; Eight the phase young to the young shrimp of 1.5cm the throw something and feed cladocera, prawn slice and the self-control artitificial food that dry, throw something and feed once every 2h, the cladocera drying is thrown something and fed 8 times every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, the cladocera drying must be through terramycin sterilization and Vc strengthening, prawn slice are thrown something and fed 2 times every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, 40 mesh sieve thin,tough silk are thrown something and fed after rubbing filter with the hands, self-control artitificial food is the egg custard that freshwater mussel meat, shrimp and duck's egg are made, throw something and feed twice every day, each feeding volume 0.17-0.35g/ ten thousand tail shrimp seedlings, throw something and feed after 40 mesh sieve thin,tough silk strandings are broken.
2. a kind of high-density industrial seed culture method for freshwater shrimps according to claim 1, is characterized in that the water inlet place of described nursery pond is provided with polyethylene filtering mesh bag, and its order is several to be determined according to shrimp seedling size: first phase is to the second stage of young, and order number is 200 orders/cm
2; Three phase phase to five young, order number is 100 orders/cm
2; After six phases, order number is 60 orders/cm
2.
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| CN104396804A (en) * | 2014-09-30 | 2015-03-11 | 颍上县中军农业科技开发有限公司 | Method for culturing grass shrimps by using net cages |
| CN104542408B (en) * | 2015-02-04 | 2017-02-22 | 南通中国科学院海洋研究所海洋科学与技术研究发展中心 | Method for synchronous line establishment of small-population parents in artificial breeding of exopalaemon carinicauda |
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| CN106857347A (en) * | 2017-03-17 | 2017-06-20 | 中国水产科学研究院淡水渔业研究中心 | A kind of method for reusing freshwater shrimp parent's nursery |
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