CN108323458B - Indoor high-density breeding method for current-year fingerling of scatophagus argus - Google Patents
Indoor high-density breeding method for current-year fingerling of scatophagus argus Download PDFInfo
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Abstract
The invention relates to the field of aquaculture, in particular to an indoor high-density culture method for current-year fingerlings of scatophagus argus, which consists of culture preparation, fingerling net pulling counting, fingerling transportation and throwing, bait management, water quality management and net pulling capturing, and adopts an indoor cement pond to carry out high-density culture on current-year fingerlings of scatophagus argusCulturing, wherein the culturing water is estuary brackish water, the artificially bred juvenile fish which are changed to eat the eel feed are transferred to an indoor cement pond, the body length is 1.3-1.5 cm, and the culturing density is 300-400 tail/m-2Feeding eel feed with the body length of less than 3cm, feeding floating pellet feed with the body length of 3cm, sucking dirt and cleaning the bottom on time during the culture period, changing water and turning over the pond in time, and capturing and transferring the current year fish seeds with the body length of more than 4-5 cm to the pond by pulling a net for culture. The survival rate of the indoor high-density culture for 181 days is 80-85%, and the technical blank of indoor intensive and large-scale production of fish seeds in the current year is filled.
Description
Technical Field
The invention relates to the field of aquaculture, in particular to an indoor high-density culture method for current-year fingerlings of scatophagus argus.
Background
Goldfish (Scatophagus argus), also known as Goldfish. Belongs to the class of the Phlebopus, the order Perciformes, the sub-order Ctenopharyngodon, the family of the Christinae, the genus of the genus Ctenopharyngodon. China is distributed from the south of the east China sea to the south China sea and the northern gulf. The scatophagus argus has delicious taste, and has ornamental value due to the scatophagus argus on the body surface, thus being a rare edible and ornamental fish. The pseudosciaena crocea has strong environmental adaptability, disease resistance and stress resistance, can grow and develop in seawater and brackish water, is suitable for being cultured in fresh water, and becomes an important culture variety in coastal areas in south China in recent years.
However, the fingerling species of the scatophagus argus are almost completely caught by the sea at present, the sea catching specifications are different (0.5-2.0cm), the fingerling species are influenced by fishery environment pollution and continuous-year sea catching, the supply of the sea catching fingerling species is unstable, farmers cannot obtain batch fingerling species in the same year to carry out artificial breeding, the existing solution is to transport the sea catching fingerling species with different specifications to a pond for temporary breeding and coarse marking, and then to carry out net pulling screening after the sea catching fingerling species grow to a certain specification, and the fingerling species in the same year with regular specifications are selected for breeding. This method has some disadvantages: 1) the specifications and the quality of the sea-caught seedlings are different, the pool storage amount cannot be estimated in the temporary breeding process of the pond, and the guarantee for normal breeding production is poor; 2) mechanical damage to the seedlings is easily caused in the operation processes of sea fishing and transportation and multiple net pulling and screening, the survival rate is broken layer by layer, and the loss is large; 3) the small scatophagus argus is clustered, the moving capability is high, the net pulling and net entering proportion is low, multiple net pulling operations are needed, time and labor are consumed, and the production efficiency is low.
2017, the breakthrough of indoor artificial breeding technology of the scatophagus argus by aquatic research institute in Shanghai city can be realized, the scatophagus argus fries can be obtained in batches, on the basis, an indoor culture technology capable of producing the scatophagus argus in the current year in batches needs to be developed, the blank of the scatophagus argus in the current year culture technology is filled, the problems of technical bottleneck and short supply plates of the existing fish in the current year are solved, and the scatophagus argus in the current year with uniform specification and good activity is continuously and stably provided for farmers.
Disclosure of Invention
The invention aims to provide an indoor high-density breeding method for current-year fingerlings of scatophagus argus.
In order to achieve the purpose, the invention provides an indoor high-density breeding method for current-year fingerling of scatophagus argus, which consists of breeding preparation, fingerling net pulling counting, fingerling transportation and throwing, bait management, water quality management and net pulling capturing, wherein an indoor cement pond is used as a breeding pond for high-density breeding of current-year fingerling of scatophagus argus, breeding water is estuary brackish water, artificially bred juvenile fishes which are changed to eat eel feed are transported to the indoor cement pond, the size body length is 1.3-1.5 cm, and the breeding density is 400 tail/m-2Feeding eel feed with the body length of less than 3cm, feeding floating pellet feed with the body length of 3cm, sucking dirt and cleaning the bottom on time during the culture period, changing water and turning over the pond in time, and capturing and transferring the current year fish seeds with the body length of more than 4-5 cm to the pond by pulling a net for culture.
Preferably, the method comprises the following steps:
a) preparing culture: the indoor rectangular cement pond is used as a current-year fish culture pond and a net cage collection and placement pond with the area of 16-20 m2(ii) a The net cage made of a 20-mesh silk net is used for counting and temporarily culturing juvenile fish, and the specification of the net cage is 90cm multiplied by 60cm multiplied by 40 cm; cultivation of fishThe water is estuary water; when young fishes are put in, the water temperature of the fry rearing pond, the culture pond and the net cage storing pond is 20-31 ℃, and the salinity is 2-12;
b) and (3) pulling and counting seedlings: transferring the juvenile fishes from the fry rearing pond to a rearing pond for rearing, lowering the water level of the fry rearing pond to 40cm before transferring, carrying out medicated bath for 40min by using 20ppm formaldehyde solution, pulling the net by using a 20-mesh soft bolting silk net, wherein the two sides of the fry rearing pond are not attached to the pond wall when pulling the net, the foot line is not attached to the pond wall when pulling the net, slowly pulling the net to naturally concentrate the juvenile fishes, keeping the purse net 5-10 cm deep from the water surface, collecting the juvenile fishes of the pseudosciaena crocea by using a 20-mesh soft nylon circular landing net, collecting the juvenile fishes of the pseudosciaena crocea, putting the juvenile fishes of the pseudosciaena crocea into a net cage, temporarily rearing for 15-30 min, temporarily rearing the density of 1.5-2;
c) seed transportation and release: transferring the young scatophagus argus to a transportation bucket by using a filter screen spoon, wherein the transportation density is 200-300 tails/L, the transportation time is controlled to be below 1-2 min, when the young scatophagus argus is placed, the transportation bucket is close to a pumice flashing area of a culture pond, the transport bucket is placed into the culture pond and is filled with pond water, so that most of the young scatophagus can swim out naturally, finally, all the transferred young scatophagus argus are poured out without dehydration, the young scatophagus argus is placed in a culture pond with the specification of the length of 1.3-1.5 cm, eel feed is changed2；
d) Bait management: feeding eel feed with body length below 3cm for 1 time each in the morning and afternoon; feeding the floating granulated feed when the body length is more than 3cm, wherein the particle size of the floating granulated feed is 1.7-2.0 mm, 5-10 g of the floating granulated feed is fed each time, the total feeding amount of the first feeding is less than 10% of the feeding amount of the first eel feed in the day, the feeding lasts for 5 days, the total feeding amount of the first feeding is increased progressively every day but is not more than 20% of the feeding amount of the first eel feed in the day, the feeding of the eel feed is stopped at the beginning of the 6 th day, the floating granulated feed is directly fed, and the floating granulated feed is fed for 1 time each day in the morning and afternoon;
e) water quality management: during the culture period, 1 time of dirt suction and bottom cleaning is carried out every day, 2 times of water changing are carried out every 7 days, 3/4 water is changed every time, 1 time of pond turning is carried out every 21 days, and the net pulling operation of the fry in the pond turning is the same as that of the juvenile fish in the step b;
f) and (3) pulling a net to capture: and (c) pulling the fish seeds with the specification body length of more than 4-5 cm in the current year to capture and transfer the fish seeds to a pond for cultivation, wherein a 15-mesh leather strip net is used for capturing the fish seeds, and the net pulling operation is the same as that of the young fish in the step b.
Preferably, in the step a, before the fish culture pond in the current year is used, 25-30 ppm of bleaching powder is used for soaking the fish culture pond in full pond water for 1-2 days, after the fish culture pond is cleaned, the fish culture pond is soaked in full pond clear water, aeration is carried out to remove residual chlorine, and after the fish culture pond is cleaned again, the fish culture pond is aired for more than 2 days; when the culture pond is used, each 0.8m21 air diffusing stone is arranged, and the air is continuously inflated to be in a microwave shape.
Preferably, the water for cultivation in the step a is aerated and precipitated by a water reservoir for 2 days before use, and is filtered by a 130-mesh silk screen when in use.
Preferably, the diameter of the dip net in the step b is 20cm, and the depth of the dip net in the step b is 10 cm; the filter screen spoon is 20 meshes in mesh with the handle, 5-8 cm in diameter and 3-4 cm in depth.
Preferably, the volume of the transportation bucket in the step c is 10L, and the transportation bucket is filled with 5L of water.
Preferably, the eel feed in the steps c and d is eel powder compound feed produced by the everlasting spring nutrient additive limited company, the crude protein is more than or equal to 45 percent, the crude fiber is less than or equal to 3 percent, the crude fat is more than or equal to 3 percent, and the crude ash content is less than or equal to 18 percent.
Preferably, the floating granulated feed in the step d is a seawater fish expanded compound feed produced by Zhejiang Minghui feed Limited, model 9930, and the feed comprises more than or equal to 40% of crude protein, less than or equal to 4% of crude fiber, more than or equal to 6% of crude fat and less than or equal to 15% of crude ash.
Preferably, in step d: feeding eel feed with the body length of less than 3cm, uniformly mixing the eel feed with water according to the proportion of 1:1 to prepare flat eel feed cakes, putting the flat eel feed cakes into square bait tables with the side length of 50cm, which are made of a leather strip net, putting 3-5 eel feed cakes into each bait table, wherein the placing depth of each bait table is 30-40 cm, arranging 1 bait table at each corner of a culture pond, feeding for 1 time at 8:00 am and 2:00 pm every day, clearing residual bait on each bait table at 5:00 pm, and withdrawing the bait tables out of the pond and cleaning.
Preferably, in step d: the floating granulated feed starts to be fed when the body length is more than 3cm, the grain size of the floating granulated feed is 1.7-2.0 mm, the feeding amount of eel feed in the feeding period is not reduced, the feeding is carried out after the eel feed is fed for the first time in the intermittent period of two times of eel feed in the day, the floating granulated feed is fed above a bait table during the feeding, the feeding amount is small, the feeding amount is 5-10 g for a plurality of times, the total feeding amount is less than 10% of the eel feed amount for the first time in the day, the feeding lasts for 5 days, the total feeding amount is increased progressively every day but is not more than 20% of the eel feed amount for the first time in the day, the eel feed is stopped and fed when the day 6 th starts to stop, the bait table is removed, the floating granulated feed is directly fed, the feeding area in the culture pond is not limited, the eel feed is fed for 8:00 in the morning and 2:00 pm in each time, and the residual bait is removed in the culture pond at 5:00 pm.
Preferably, in step d: in the stage of feeding eel feed, the water temperature is 25-28 ℃, the weight is less than 2g, the daily feeding rate is 7.5-10.0%, the water temperature is 28-30 ℃, the weight is 2-5 g, and the daily feeding rate is 5.0-7.5%; in the stage of feeding the floating granulated feed, the water temperature is 28-30 ℃, the weight is 5-7 g, the daily feeding rate is 2.5-3.5%, the water temperature is 24-28 ℃, the weight is 7-10 g, the daily feeding rate is 2.0-2.5%, the water temperature is 20-24 ℃, the weight is 11-15 g, and the daily feeding rate is 1.0-1.5%.
Preferably, in step e: after water is changed or the pond is turned over, the culture pond is disinfected by 1ppm of chlorine dioxide preparation with the effective content of 10 percent; and pulling the net for the fry to operate the same as the juvenile fish during pond turning, transporting the fry with a 10L transportation bucket, scooping the fry with water in the purse net by using the bucket during transportation, wherein the transportation density is 50-80 tails/L when the average weight is below 5g, the transportation density is 30-50 tails/L when the average weight is 5-10 g, the average weight is 10-15 tails/L when the average weight is 10-15 g, and the transportation time is controlled to be below 1 min.
Preferably, in step f: under the condition of water temperature of 26-30 ℃, after 100 days of culture, the fingerlings can grow to 4-5 cm in length and 4-6 g in weight in the same year, and the culture survival rate is 82% -88%; under the condition of water temperature of 20-31 ℃, after 150 days of culture, the fish seeds can grow to 5-6 cm in length and more than 10g in weight in the same year, and the culture survival rate is 80-85%.
The invention has the advantages that:
1. the fish culture density of the method in the current year (300-2) Is obviously higher than the density of pond culture (25-30 tails/m)2) The culture survival rate (80-85%) is higher than that of pond culture (60-70%);
2. the fish species cultured by the method in the current year have uniform specification, long body and small weight variation coefficient, and compared with the fish species cultured in a pond by two-pole differentiation, the fish species do not need to be screened after being discharged from the pond;
3. the technical scheme for indoor high-density cultivation of the fingerlings of the scatophagus argus in the current year is provided, the technical blank of indoor intensive and large-scale production of the fingerlings in the current year is filled, and compared with pond cultivation, the indoor high-density cultivation method saves cultivation water, saves cultivation space, and is more energy-saving and environment-friendly;
4. the fish seeds meeting the specification requirements of farmers can be continuously and stably provided, the aquaculture planning of the farmers can be facilitated, and the indirect aquaculture cost can be reduced. The invention has simple and convenient operation and is easy to be accepted and popularized by people.
Detailed Description
The following examples are provided to illustrate specific embodiments of the present invention.
Example 1:
the invention relates to an indoor high-density breeding method for current-year fingerlings of scatophagus argus, which adopts the technical scheme that the method consists of breeding preparation, fingerling net pulling counting, fingerling transportation and putting, bait management, water quality management and net pulling capture, and specifically comprises the following steps:
preparing culture: before cultivation is carried out, an indoor rectangular cement pond is prepared to serve as a current-year fish culture pond and a net cage collection and placement pond, and the area is 16-20 m2Soaking the fish in 25-30 ppm bleaching essence full-pool water for 1-2 days before use, soaking the fish in clear water after cleaning, aerating to remove residual chlorine, cleaning again, airing for more than 2 days for later use, preparing a net cage made of a 20-mesh silk net for counting and temporarily culturing juvenile fish, wherein the specification of the net cage is 90cm multiplied by 60cm multiplied by 40cm, the culture water is estuary water, the water temperature is 20-31 ℃, the salinity is 2-12, aerating and precipitating the fish in a reservoir for 2 days before use, filtering the fish by a 130-mesh silk net when in use, and filtering the culture pond by every 0.8m when in use21 air stone is arranged and is continuously inflated into a microwave shape, and the water temperature and the salinity of the fry rearing pond, the breeding pond and the net cage storing pond are the same when young fishes are thrown in；
And (3) pulling and counting seedlings: transferring the juvenile fishes from the fry rearing pond to a rearing pond for rearing, lowering the water level of the fry rearing pond to 40cm before transferring, carrying out medicated bath for 40min by using 20ppm formaldehyde solution (containing 37-40% formaldehyde), pulling the net by using a 20-mesh soft bolting silk net, wherein two sides of the fry rearing pond are not attached to the pond wall when pulling the net, a foot line is not attached to the pond wall when pulling the net, slowly pulling the net to naturally concentrate the juvenile fishes, keeping the purse net 5-10 cm deep from the water surface, collecting the juvenile fishes of the pseudosciaena crocea by using a 20-mesh soft nylon circular braille net, wherein the diameter of the braille net is 20cm, the depth of the braille net is 10cm, collecting the juvenile fishes of the pseudosciaena crocea, putting the juvenile fishes into a net cage, temporarily rearing for 15-30 min, and temporarily rearing density is 1.5-2.0 ten thousand fish per net cage, and sampling and counting by;
seed transportation and release: transferring the young scatophagus argus to a transportation bucket by using a filter screen spoon, wherein the volume of the transportation bucket is 10L, water is filled for 5L, the transportation density is 200-300 tails/L, the transportation time is controlled to be below 1-2 min, when the young scatophagus argus is placed, the transportation bucket is close to a gas stone flashing area of a culture pond, the culture pond is placed and the pond water is filled back, so that most of the young scatophagus argus naturally swim out, finally, all the transferred young scatophagus argus are poured out without dehydration, the young scatophagus argus are thrown into the transportation bucket, the size of the young scatophagus argus2；
Bait management: feeding eel feed with a body length of less than 3cm, uniformly mixing the eel feed with water according to a ratio of 1:1 to prepare flat eel feed cakes, putting the flat eel feed cakes into square bait tables with side lengths of 50cm, which are prepared from a leather strip net, putting 3-5 eel feed cakes into each bait table, wherein the bait tables are placed to a depth of 30-40 cm, 1 bait table is respectively arranged at each corner of a culture pond, feeding is carried out for 1 time at 8:00 am and 2:00 pm every day, residual bait on the bait tables is removed at 5:00 pm, the bait tables are taken out of the pond and cleaned, feeding is carried out when the body length is more than 3cm, the particle size of the floating granular feed is 1.7-2.0 mm, the eel feed amount is not reduced in the feeding period, feeding is carried out after the first eel feed is finished in the intermittence period of twice in the day, the floating granular feed is thrown above the bait tables, and the eel feed amount is a small amount, feeding 5-10 g each time, wherein the total feeding amount of the first feeding is less than 10% of the first eel feed feeding amount on the day, the feeding lasts for 5 days, the total feeding amount of the first feeding is increased gradually every day but is not more than 20% of the first eel feed feeding amount on the day, the feeding of eel feed is stopped at the beginning of the 6 th day, a bait table is removed, the floating pellet feed is directly fed, the feeding area in the culture pond is not limited, the feeding is performed for 8:00 am and 2:00 pm for 1 time each day, the residual bait in the culture pond is removed at 5:00 pm, the stage of feeding the eel feed is that the water temperature is 25-28 ℃, the weight is less than 2g, the daily feeding rate is 7.5-10.0%, the water temperature is 28-30 ℃, the weight is 2-5 g, the daily feeding rate is 5.0-7.5%, the stage of feeding the floating pellet feed is that the water temperature is 28-30 ℃, 5-7 g, the daily feeding rate is 2.5-3.5%, the water temperature is 24-5 ℃, the daily feeding rate is 10-2.5%, the water temperature is 20-24 ℃, the weight is 11-15 g, and the daily feeding rate is 1.0-1.5%;
water quality management: during the culture period, sewage is sucked and the bottom is cleaned 1 time every day, water is changed 2 times every 7 days, water is changed 3/4 every time, the pond is turned over 1 time every 21 days, after water is changed or the pond is turned over every time, the culture pond is disinfected by 1ppm chlorine dioxide preparation with the effective content of 10%, when the pond is turned over, the fry is pulled to the net and is operated with young fishes, a 10L transportation bucket is used for transporting, when the fish is transported, a bucket is used for carrying water in the purse net, the transportation density is 50-80 tails/L when the average weight is below 5g, the average weight is 30-50 tails/L when the average weight is 5-10 g, the average weight is 10-15 tails/L when the average weight is 10-15 g, and the transportation time is controlled;
and (3) pulling a net to capture: the method comprises the steps that after 100 days of culture at the water temperature of 26-30 ℃, fingerlings in the current year can grow to 4-5 cm in body length and 4-6 g in weight, the culture survival rate is 82-88%, and after 150 days of culture at the water temperature of 20-31 ℃, fingerlings in the current year can grow to 5-6 cm in body length and more than 10g in weight, the culture survival rate is 80-85%, the fingerlings in the current year with the specification of body length of 4-5 cm are captured and transferred to a pond for culture, 15-mesh leather strip nets are used for capturing, and the operation of pulling the nets is the same as that of juvenile fishes.
Example 2:
by adopting the method of the embodiment 1, the saggy scientific research base of Shanghai city aquatic research institute develops indoor high-density cultivation of current-year pseudosciaena crocea fingerlings in No. 4 shed 407 pool in 2017, and the initial specification is as follows: the body length is 1.68 +/-0.23 cm, the body weight is 0.34 +/-0.13 g, and the initial breeding density is 375 tail/m2The breeding period is 181 days, and the fish species in the same year are caughtSpecification: the body length is 6.67 plus or minus 0.54cm, the weight is 15.49 plus or minus 3.69g, the cultivation survival rate is 85.8 percent, and the feed coefficient is 1.52.
Example 3:
by adopting the method of the embodiment 1, the sagitta scientific research base of Shanghai city aquatic research institute develops indoor high-density cultivation of current-year fingerlings of the scatophagus argus in No. 4 shed 408 pond in 2017, and the initial specification is as follows: the body length is 1.68 +/-0.23 cm, the body weight is 0.34 +/-0.13 g, and the initial culture density is 312 tails/m2And the breeding period is 181 days, and the specification of the fish species in the year when the fish is caught: the body length is 6.40 plus or minus 0.99cm, the weight is 13.60 plus or minus 6.45g, the cultivation survival rate is 80.5 percent, and the feed coefficient is 1.76.
Example 4:
by adopting the method of the embodiment 1, the sagitta scientific research base of Shanghai city aquatic research institute develops indoor high-density cultivation of current-year pseudosciaena crocea in No. 4 shed 409 pool in 2017, and the initial specification is as follows: the body length is 1.68 +/-0.23 cm, the body weight is 0.34 +/-0.13 g, and the initial culture density is 312 tails/m2And the breeding period is 181 days, and the specification of the fish species in the year when the fish is caught: 6.62 cm plus or minus 0.75cm in body length, 15.25 plus or minus 5.58g in body weight, 84.6 percent of cultivation survival rate and 1.55 percent of bait coefficient.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit of the invention, and the scope of the appended claims is to be accorded the full range of equivalents.
Claims (9)
1. An indoor high-density breeding method of current-year fingerlings of scatophagus argus is characterized in that,
the method comprises the following steps: a) preparing culture: the indoor rectangular cement pond is used as a current-year fish culture pond and a net cage collection and placement pond with the area of 16-20 m2(ii) a The net cage made of a 20-mesh silk net is used for counting and temporarily culturing juvenile fish, and the specification of the net cage is 90cm multiplied by 60cm multiplied by 40 cm; the culture water is estuary water; when young fishes are put in, the water temperature of the fry rearing pond, the culture pond and the net cage storing pond is 20-31 ℃, and the salinity is 2-12 per mill;
b) and (3) pulling and counting seedlings: transferring the juvenile fishes from the fry rearing pond to a rearing pond for rearing, lowering the water level of the fry rearing pond to 40cm before transferring, carrying out medicated bath for 40min by using 20ppm formaldehyde solution, pulling the net by using a 20-mesh soft bolting silk net, wherein the two sides of the fry rearing pond are not attached to the pond wall when pulling the net, the foot line is not attached to the pond wall when pulling the net, slowly pulling the net to naturally concentrate the juvenile fishes, keeping the purse net 5-10 cm deep from the water surface, collecting the juvenile fishes of the pseudosciaena crocea by using a 20-mesh soft nylon circular landing net, collecting the juvenile fishes of the pseudosciaena crocea, putting the juvenile fishes of the pseudosciaena crocea into a net cage, temporarily rearing for 15-30 min, temporarily rearing the density of 1.5-2;
c) seed transportation and release: transferring the young scatophagus argus to a transportation bucket by using a filter screen spoon, wherein the transportation density is 200-300 tails/L, the transportation time is controlled to be below 1-2 min, when the young scatophagus argus is placed, the transportation bucket is close to a pumice flashing area of a culture pond, the transport bucket is placed into the culture pond and is filled with pond water, so that most of the young scatophagus can swim out naturally, finally, all the transferred young scatophagus argus are poured out without dehydration, the young scatophagus argus is placed in a culture pond with the specification of the length of 1.3-1.5 cm, eel feed is changed2；
d) Bait management: feeding eel feed with body length below 3cm for 1 time each in the morning and afternoon; feeding the floating granulated feed when the body length is more than 3cm, wherein the particle size of the floating granulated feed is 1.7-2.0 mm, 5-10 g of the floating granulated feed is fed each time, the total feeding amount of the first feeding is less than 10% of the feeding amount of the first eel feed in the day, the feeding lasts for 5 days, the total feeding amount of the first feeding is increased progressively every day but is not more than 20% of the feeding amount of the first eel feed in the day, the feeding of the eel feed is stopped at the beginning of the 6 th day, the floating granulated feed is directly fed, and the floating granulated feed is fed for 1 time each day in the morning and afternoon;
e) water quality management: during the culture period, 1 time of dirt suction and bottom cleaning is carried out every day, 2 times of water changing are carried out every 7 days, 3/4 water is changed every time, 1 time of pond turning is carried out every 21 days, and the net pulling operation of the fry in the pond turning is the same as that of the juvenile fish in the step b;
f) and (3) pulling a net to capture: and (c) pulling the fish seeds with the specification body length of more than 4-5 cm in the current year to capture and transfer the fish seeds to a pond for cultivation, wherein a 15-mesh leather strip net is used for capturing the fish seeds, and the net pulling operation is the same as that of the young fish in the step b.
2. A zamioculcas zamiifolia as claimed in claim 1The indoor high-density breeding method of the fingerling in the year is characterized in that in the step a, the fingerling breeding pond in the year is soaked in 25-30 ppm of bleaching concentrate full pond water for 1-2 days before use, the fishling breeding pond is soaked in clear water after being cleaned, residual chlorine is removed through aeration, and the fishling breeding pond is cleaned again and then aired for more than 2 days; when the culture pond is used, each 0.8m21 air diffusing stone is arranged, and the air is continuously inflated to be in a microwave shape; the water for cultivation is aerated and precipitated by a reservoir for 2 days before use, and is filtered by a 130-mesh silk screen when in use.
3. The indoor high-density cultivation method of current-year pseudosciaena hybrida fish species according to claim 1, wherein the diameter of the dip net in the step b is 20cm, and the depth is 10 cm; the filter screen spoon is 20 meshes in mesh with the handle, 5-8 cm in diameter and 3-4 cm in depth.
4. The method for indoor high-density cultivation of current-year pseudosciaena crocea according to claim 1, wherein the transportation water bucket in step c has a volume of 10L and contains 5L of water.
5. The indoor high-density cultivation method of current-year pseudosciaena clarkii fish species of claim 1, wherein the eel feed in the steps c and d is eel powder compound feed produced by the perennial Quanxing nutritional supplement GmbH, crude protein is more than or equal to 45%, crude fiber is less than or equal to 3%, crude fat is more than or equal to 3%, and crude ash content is less than or equal to 18%; the floating granulated feed in the step d is a seawater fish expanded compound feed produced by Zhejiang Minghui feed Limited company, with the model number of 9930, the crude protein is more than or equal to 40 percent, the crude fiber is less than or equal to 4 percent, the crude fat is more than or equal to 6 percent, and the crude ash content is less than or equal to 15 percent.
6. The indoor high-density cultivation method of current-year pseudosciaena hybrida according to claim 1, wherein in the step d: feeding eel feed with the body length of less than 3cm, uniformly mixing the eel feed with water according to the proportion of 1:1 to prepare flat eel feed cakes, putting the flat eel feed cakes into square bait tables with the side length of 50cm, which are made of a leather strip net, putting 3-5 eel feed cakes into each bait table, wherein the placing depth of each bait table is 30-40 cm, arranging 1 bait table at each corner of a culture pond, feeding for 1 time at 8:00 am and 2:00 pm every day, clearing residual bait on each bait table at 5:00 pm, and withdrawing the bait tables out of the pond and cleaning.
7. The indoor high-density cultivation method of current-year pseudosciaena hybrida according to claim 1, wherein in the step d: the floating pellet feed is started to be fed when the body length is more than 3cm, the particle size of the floating pellet feed is 1.7-2.0 mm, the feeding amount of the eel feed is not reduced in the feeding period, in the intermission period of two times of eel feed feeding in the daytime, after the eel feed is fed for the first time, the feeding is carried out, the floating pellet feed is fed above the bait table during the feeding, the feeding amount for the feeding is a small amount of times, 5-10 g of the eel feed is fed for each time, the total feeding amount for the first feeding is less than 10% of the feeding amount for the first eel feed on the day, the feeding lasts for 5 days, the total feeding amount for the feeding is increased gradually every day, but not more than 20% of the first eel feed feeding amount on the day, stopping feeding eel feed at the beginning of the 6 th day, removing the bait table, directly feeding floating pellet feed, wherein the feeding area in the culture pond is not limited, feeding is carried out for 1 time respectively at 8:00 am and 2:00 pm every day, and residual bait in the culture pond is removed at 5:00 pm.
8. The indoor high-density cultivation method of current-year pseudosciaena hybrida according to claim 1, wherein in the step d: in the stage of feeding eel feed, the water temperature is 25-28 ℃, the weight is less than 2g, the daily feeding rate is 7.5-10.0%, the water temperature is 28-30 ℃, the weight is 2-5 g, and the daily feeding rate is 5.0-7.5%; in the stage of feeding the floating granulated feed, the water temperature is 28-30 ℃, the weight is 5-7 g, the daily feeding rate is 2.5-3.5%, the water temperature is 24-28 ℃, the weight is 7-10 g, the daily feeding rate is 2.0-2.5%, the water temperature is 20-24 ℃, the weight is 11-15 g, and the daily feeding rate is 1.0-1.5%.
9. The indoor high-density cultivation method of current-year pseudosciaena hybrida according to claim 1, wherein in the step e: after water is changed or the pond is turned over, the culture pond is disinfected by 1ppm of chlorine dioxide preparation with the effective content of 10 percent; and pulling the net for the fry to operate the same as the juvenile fish during pond turning, transporting the fry with a 10L transportation bucket, scooping the fry with water in the purse net by using the bucket during transportation, wherein the transportation density is 50-80 tails/L when the average weight is below 5g, the transportation density is 30-50 tails/L when the average weight is 5-10 g, the average weight is 10-15 tails/L when the average weight is 10-15 g, and the transportation time is controlled to be below 1 min.
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| CN111869604A (en) * | 2020-07-17 | 2020-11-03 | 广西壮族自治区水产科学研究院 | Construction method of egg-shaped pompano full-sib family |
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| CN113647345B (en) * | 2021-07-30 | 2023-01-03 | 陵水晨海种业有限公司 | Industrial artificial breeding method for Scorzonera gigas |
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