CN111134052A - Method for cultivating grouper - Google Patents
Method for cultivating grouper Download PDFInfo
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- CN111134052A CN111134052A CN202010076184.5A CN202010076184A CN111134052A CN 111134052 A CN111134052 A CN 111134052A CN 202010076184 A CN202010076184 A CN 202010076184A CN 111134052 A CN111134052 A CN 111134052A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/17—Hatching, e.g. incubators
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
- A23K10/18—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions of live microorganisms
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
- A23K10/22—Animal feeding-stuffs from material of animal origin from fish
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
- Y02A40/818—Alternative feeds for fish, e.g. in aquacultures
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Abstract
The invention discloses a method for cultivating grouper, which comprises connecting an outdoor ecological pond and an indoor seedling pond by a pipeline, pumping algae water in the outdoor ecological pond into the indoor seedling pond, arranging a drain pipe at the bottom of the indoor seedling pond to communicate with the outdoor ecological pond, discharging tail water in the indoor seedling pond into the outdoor ecological pond, forming a relay circulation grouper seedling system for indoor and outdoor seedling culture, solving the disadvantages of ecological seedling culture and industrialized circulation water seedling culture in the grouper pond, giving full play to the advantages of the two seedling culture methods, providing SS type rotifers with sufficient density as opening baits for opened fish in the opening period, ensuring that most fish fries can be opened smoothly in the opening period at the first time, continuously keeping high-density live baits in the growth period of the fish fries, ensuring that all fish fries are relatively synchronous in development in the early period, and reducing individual differences among the same batch of fish fries as much as possible, avoiding cannibalism of the same species, greatly improving the quantity of seedlings and improving the rate of seedlings emergence.
Description
Technical Field
The invention relates to the technical field of aquaculture, in particular to a method for cultivating grouper.
Background
Grouper cultivation is one of the important industries of marine fish cultivation in China, and the annual cultivation yield is 10-15 ten thousand tons. In recent years, the grouper breeding industry in China is rapidly developed, each party focuses on grouper breeding and research strength, parent grouper is bred in a cage, ecological breeding in a pond is realized, parent grouper breeding technology enables parent grouper to grow gonads in an artificial breeding controllable environment, and order type production of fertilized eggs can be realized through induced spawning. The ecological breeding technology of the pond utilizes a large water body of the pond and a relatively controllable breeding environment, and manually regulates and controls the dynamic balance of bacteria (mainly beneficial bacteria) -algae (mainly unicellular algae) -worms (mainly rotifers, copepods and the like) in the pond to ensure that the active bait in the pond is sufficient, so that the nutritional requirements required by each stage of early development of the grouper can be met.
The pond ecological seedling raising is the seedling raising method which is most widely applied and has the largest number of seedlings, but the overall rate of emergence is not high and is only 5-10%. In addition, the pond seedling raising is a relatively open environment, such as abnormal weather of typhoon, rainstorm and the like, the water quality of the pond is easily affected, the salinity of the long-term rainstorm seedling raising pond is greatly changed, terrestrial pollutants are flushed into the pond, so that the existing bacteria imbalance, algae outbreak or death and algae dumping and the like are caused, and part of weak individuals are caused to have strong stress reaction due to the abnormal weather, so that latent pathogenic viruses or bacteria in the body, such as nervous necrosis viruses, pathogenic vibrios and the like, are activated.
With the continuous updating and breakthrough of factory-like circulating water culture facilities and technologies in recent years, the ecological environment-friendly concept of factory-like circulating water culture, namely 'not competing for land with grains and not competing for water with people' is in accordance with the green development trend advocated by China and society at present, and the factory-like circulating water culture can avoid the problems that the pond ecological culture and seedling culture cannot be avoided, such as no weather influence, less water inflow, strict disinfection and no external pollution. The industrial circulating water grouper fry culture has the advantages, but the majority of the fries in the market are ecological fries in ponds at present due to high facility cost, difficult technical control, high personnel quality requirement, difficult supply guarantee of palatable active baits in each stage and the like.
Therefore, how to solve the respective disadvantages of ecological grouper pond breeding and industrial circulating water breeding, give full play to the advantages of the two breeding methods, and improve the rate of emergence in the grouper breeding process becomes a technical problem to be solved in the field.
Disclosure of Invention
In order to solve the problems, the invention provides a method for breeding grouper.
The technical problem to be solved by the invention is realized by the following technical scheme:
a method for cultivating grouper comprises the following steps:
constructing an indoor seedling raising pond and an outdoor ecological pond; the indoor seedling raising pond and the outdoor ecological pond are connected through a pipeline, so that water in the indoor seedling raising pond and water in the outdoor ecological pond can circularly flow;
installing an incubation net cage in the indoor seedling raising pond, and incubating fertilized eggs of the grouper through the incubation net cage to obtain larval fish;
after the fry are opened in the incubation net cage, feeding SS rotifers for feeding by the opening, and keeping the density of the SS rotifers in the water body of the incubation net cage to be 50-100/ml and the density of the fry to be 2-5 fish/ml;
when the caliber of the fry reaches 150-; rotifers are cultivated in the seedling raising pond, the density of the rotifers in the water body of the seedling raising pond is 10-20/ml, and the density of the larva fishes is 5-10 fish/100 ml.
Furthermore, the indoor seedling raising pond comprises a pond body, a water outlet is formed in the bottom of the pond body, the periphery of the bottom of the pond body is inclined to the water outlet, and the inclination is 20-30 degrees; the side wall of the tank body is provided with a plurality of air inlet pipes which enable water in the tank body to rotate along the anticlockwise direction or the clockwise direction; the pipeline comprises a water drainage pipe and a water inlet pipe; the water discharge pipe is arranged at the water discharge port and used for circulating the water body in the indoor seedling raising pond to the outdoor ecological pond; the water inlet pipe is arranged above the pond body, a water pump is arranged on the water inlet pipe, and the water in the outdoor ecological pond is circulated to the indoor seedling raising pond through the water pump.
Further, the drain pipe comprises a first drain pipe and a second drain pipe; the first water drainage pipe is arranged above the water outlet, and the second water drainage pipe is arranged below the water outlet; the first drain pipe comprises an outer pipe and an inner pipe which are sleeved with each other, a plurality of first drain holes are formed in the upper end of the inner pipe, a plurality of second drain holes are formed in the lower end of the outer pipe, the inner pipe is higher than the outer pipe, the first drain holes are located at a position lower than the height of the outer pipe, and a pipe orifice in the bottom of the inner pipe is communicated with the second drain pipes and is consistent in size.
Furthermore, the positions of the water pump and the second drain pipe discharged into the outdoor ecological pond are arranged in a diagonal line manner; the air inlet pipe is arranged 50-100cm below the water surface of the pool body.
Furthermore, the pool body is a circular pool with the diameter of 5-8m and the depth of 1.5-2 m; be provided with detachable filter screen in the inlet tube, according to the developmental stage of fry sets up in the indoor pond of growing seedlings the mesh number of detachable filter screen: when the fry is in the fry stage, the mesh number of the detachable filter screen is 100 meshes; when the fry is in the juvenile stage, the mesh number of the detachable filter screen is 30-50 meshes; and a fish blocking net for blocking grouper fries is arranged at the tail end of the second water drainage pipe.
Further, the diameter of the outer pipe is 50-90cm, and the diameter of the inner pipe is 40-60 cm; the first drainage hole is 10-20cm away from the top of the inner pipe; the second drain hole is 10-20cm away from the bottom of the outer pipe.
Further, the method for constructing the outdoor ecological pond comprises the following steps:
(1) providing an outdoor pond, wherein an aerator is arranged in the outdoor pond;
(2) sterilizing the outdoor pond;
(3) carrying out pond water quality cultivation;
(4) and putting shrimp larvae, mackerel and trachinotus ovatus into the pond for mixed culture, and continuously regulating and controlling the water quality of the pond in the mixed culture process to maintain a balanced ecological environment.
Further, the pond water quality cultivation is operated according to the following steps: and inoculating and culturing the unicellular algae, the rotifers and the copepods in the pond in sequence.
Further, inoculating unicellular algae into the pond, applying a compound fertilizer, inflating by the aerator and the air pump and irradiating by sunlight to quickly propagate the unicellular algae; inoculating rotifer 7 days later; and inoculating copepods when the density of the rotifers is remarkably increased.
Further, when the number of rotifers and copepods in the pond reaches a peak value, putting shrimp larvae, maculownia siganus and trachinotus ovatus into the pond for mixed culture; when the body length of the shrimp larvae is 0.5-0.8cm, putting artificial baits into the pond; the industrial bait comprises probiotics and eel meal to form a microecological balance system mainly comprising the probiotics, monadaceae, rotifer and copepods; wherein the area of the outdoor pond is 2-5 mu; the putting amount of the shrimp larvae is 20-50 ten thousand, the putting amount of the siganus oramin is 5000-minus, and the putting amount of the trachinotus ovatus is 200-minus 500-minus.
Further, still include: and when the body length of the shrimp larvae is 1.5-2cm, feeding No. 0 shrimp feed into the pond.
The invention has the following beneficial effects:
the invention provides a method for cultivating grouper, which creatively connects an outdoor ecological pond and an indoor seedling pond by a pipeline, extracts algae water (containing a large amount of beneficial bacteria and unicellular algae) in the outdoor ecological pond into the indoor seedling pond, arranges a drain pipe at the bottom of the indoor seedling pond to communicate with the outdoor ecological pond, discharges tail water of the indoor seedling pond into the outdoor ecological pond, forms a relay circulation grouper seedling system for indoor seedling culture and outdoor algae culture (simultaneously culturing active baits such as beneficial bacteria, rotifers, copepods and the like), solves the respective defects of ecological seedling culture and industrial circulation water seedling culture in the grouper pond and fully exerts the advantages of the two seedling culture methods; and opening the obtained fry continuously in an incubation net cage for initial incubation, transferring the fry in the incubation net cage together with water to a seedling raising pond for culturing after culturing for a certain time, simultaneously providing SS type rotifers with sufficient density for the opened fry in time in the opening period as opening bait, and continuously keeping high-density live bait in the development stage of the fry, so that all the fries in the early stage of seedling culture are relatively synchronous in development, the individual difference among the fries in the same batch is reduced as much as possible, the cannibalism is avoided, the seedling emergence number is greatly improved, and the seedling emergence rate is improved.
Drawings
FIG. 1 is a schematic diagram of the arrangement of an indoor seedling raising pond and an outdoor ecological pond according to the invention;
FIG. 2 is a schematic structural view of an indoor nursery pond according to the present invention.
In the figure: 1. indoor pond of growing seedlings, 2, outdoor ecological pond, 3, inlet tube, 4, drain pipe, 5, water pump, 6, cell body, 7, first drain pipe, 71, outer tube, 72, inner tube, 73, first wash port, 74, second wash port, 8, second drain pipe, 9, intake pipe, 10, incubation box with a net.
Detailed Description
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
Unless otherwise defined, terms used in the present specification have the same meaning as those generally understood by those skilled in the art, but in case of conflict, the definitions in the present specification shall control.
The use of "including," "comprising," "containing," "having," or other variations thereof herein, is meant to encompass the non-exclusive inclusion, as such terms are not to be construed. The term "comprising" means that other steps and ingredients can be added that do not affect the end result. The term "comprising" also includes the terms "consisting of …" and "consisting essentially of …". The compositions and methods/processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.
All numbers or expressions referring to quantities of ingredients, process conditions, etc. used in the specification and claims are to be understood as modified in all instances by the term "about". All ranges directed to the same component or property are inclusive of the endpoints, and independently combinable. Because these ranges are continuous, they include every value between the minimum and maximum values. It should also be understood that any numerical range recited herein is intended to include all sub-ranges within that range.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As described in the background art, the prior art has the problem of low emergence rate in grouper fry breeding, the average emergence rate is 5-10%, but the reason for the defect is not clear, and the inventor finds out through research that: in the initial stage, the fact that the fries cannot be opened synchronously is an important factor which causes the final emergence rate to be low, because the same batch of fertilized eggs hatch the fries and need to be opened to feed exogenous nutrition after the endogenous nutrition is absorbed, at the moment, the vitality of the fries is weak, if the palatable food supplement energy cannot be taken in time when the internal and external nutrition is connected in the initial stage, the opening of the fries is failed and the fries are stung and even starved to die, on the other hand, if the density of the opening bait which is palatable in the initial stage is not enough, the opening bait is just distributed around part of the fries in the initial stage to be opened successfully in time, the other part of the fries in the initial stage can be fed into the palatable bait opening after the opening bait which is not enough to swim for a period of time, each step of the fries in the subsequent growth and development of the fries which are opened first is slower and slower, the juvenile fish of the marine fish is generally carnivorous and eats live baits in the development period, and particularly after the marine fish is transformed into juvenile fish, the same species which are in slow development and are small in juvenile fish individuals can be regarded as palatable baits to be preyed on in a large amount, so that the small species which are in slow development and are even eating the same species which are small in individuals can be attacked by the fast development and the fast development, and the final emergence rate is greatly reduced. In the traditional culture of the grouper fries, the fertilized eggs of the grouper are usually incubated in an incubation net cage, the obtained newly-incubated larval fish is directly put into a seedling pond for culture, and the opening process of the newly-incubated larval fish is carried out in the seedling pond; therefore, the larval fish individual shedding periods are different, the individual difference among the same batch of fries is large, the larval fish with the shed later is eliminated in the cultivation process, and the final emergence number is not high, and the emergence rate is low.
The method aims to overcome the respective defects of ecological breeding and industrial circulating water breeding of the grouper pond and give full play to the advantages of two breeding methods, simultaneously ensure that the larval stage is opened simultaneously, ensure that the early stage development is synchronous, avoid the attack of fast-developing large fries and the ingestion of slow-developing small fries due to the asynchronous development in the later stage, and improve the emergence rate. The invention provides a method for cultivating grouper, which creatively connects an outdoor ecological pond and an indoor seedling pond by a pipeline, extracts algae water (containing a large amount of beneficial bacteria and unicellular algae) in the outdoor ecological pond into the indoor seedling pond, arranges a drain pipe at the bottom of the indoor seedling pond to communicate with the outdoor ecological pond, discharges tail water of the indoor seedling pond into the outdoor ecological pond, forms a relay circulation grouper seedling system for indoor seedling culture and outdoor algae culture (simultaneously culturing active baits such as beneficial bacteria, rotifers, copepods and the like), solves the respective defects of ecological seedling culture and industrial circulation water seedling culture in the grouper pond and fully exerts the advantages of the two seedling culture methods; and opening the obtained fry continuously in an incubation net cage for initial incubation, transferring the fry in the incubation net cage together with water to a seedling raising pond for culturing after culturing for a certain time, simultaneously providing SS type rotifers with sufficient density for the opened fry in time in the opening period as opening bait, and continuously keeping high-density live bait in the development stage of the fry, so that all the fries in the early stage of seedling culture are relatively synchronous in development, the individual difference among the fries in the same batch is reduced as much as possible, the cannibalism is avoided, the seedling emergence number is greatly improved, and the seedling emergence rate is improved.
A method for cultivating grouper comprises the following steps:
constructing an indoor seedling raising pond and an outdoor ecological pond; the indoor seedling raising pond and the outdoor ecological pond are connected through a pipeline, so that water in the indoor seedling raising pond and water in the outdoor ecological pond can circularly flow;
installing an incubation net cage in the indoor seedling raising pond, and incubating fertilized eggs of the grouper through the incubation net cage to obtain larval fish;
after the fry are opened in the incubation net cage, feeding SS rotifers for feeding by the opening, and keeping the density of the SS rotifers in the water body of the incubation net cage to be 50-100/ml and the density of the fry to be 2-5 fish/ml;
when the caliber of the fry reaches 150-; rotifers are cultivated in the seedling raising pond, the density of the rotifers in the water body of the seedling raising pond is 10-20/ml, and the density of the larva fishes is 5-10 fish/100 ml.
The indoor seedling raising pond comprises a pond body, wherein the pond body is preferably a circular pond with the diameter of 5-8m and the depth of 1.5-2 m.
The bottom of the pool body is provided with a water outlet, the periphery of the bottom of the pool body is inclined to the water outlet, and the inclination is 20-30 degrees.
And a plurality of air inlet pipes which enable water in the tank body to rotate along the anticlockwise direction or the clockwise direction are arranged on the side wall of the tank body.
In the invention, the number of the air inlet pipes is not particularly limited, as long as the water in the tank body rotates along the anticlockwise direction or the clockwise direction to form a vortex. Preferably, the number of the intake pipes is three or more.
The air inlet pipe is arranged 50-100cm below the water surface of the tank body, and the air inlet pipe is connected with an air source and supplies oxygen to the inner cavity of the tank body.
According to the invention, the air inlet pipes with the same arrangement direction are arranged on the side wall of the tank body, so that when the tank body is inflated, water in the tank body rotates anticlockwise or clockwise to form a vortex with a certain flow velocity, dead eggs and impurities collected in the center of the tank body due to the cyclone effect can be conveniently discharged, and fries have the habit of water-jacking countercurrent and can selectively escape from the central water outlet.
The pipeline comprises a water drainage pipe and a water inlet pipe; the water discharge pipe is arranged at the water discharge port and used for circulating the water body in the indoor seedling raising pond to the outdoor ecological pond; the water inlet pipe is arranged above the pond body, a water pump is arranged on the water inlet pipe, and the water in the outdoor ecological pond is circulated to the indoor seedling raising pond through the water pump.
One end of the water drainage pipe is connected with the water drainage port, and the other end of the water drainage pipe is connected with the outdoor ecological pond; the water inlet of the water pump is communicated with the outdoor ecological pond and used for pumping water from the outdoor ecological pond, and the water outlet of the water pump is communicated with the pond body through a water inlet pipe. Because the altitude of the outdoor ecological pond is lower than that of the indoor seedling raising pond, a water pump is required to be arranged in the pond to pump the water in the pond to the indoor seedling raising pond.
Preferably, the water pump is a variable-frequency submersible pump, and the operation power can be automatically changed by adjusting the water inlet size according to a switch at a water inlet of the seedling raising pond.
The drain pipe comprises a first drain pipe and a second drain pipe; the first water drainage pipe is arranged above the water outlet and communicated with the water outlet, and the second water drainage pipe is arranged below the water outlet and communicated with the water outlet; the first drain pipe comprises an outer pipe and an inner pipe which are sleeved with each other, a plurality of first drain holes are formed in the upper end of the inner pipe, a plurality of second drain holes are formed in the lower end of the outer pipe, the inner pipe is higher than the outer pipe, the first drain holes are located at a position lower than the height of the outer pipe, and a pipe orifice in the bottom of the inner pipe is communicated with the second drain pipes and is consistent in size. Through this kind of setting for during the drainage, open the drainage switch, in the middle of being inhaled outer tube and inner tube from the second wash port of outer tube bottom to the pond tail water that educates containing impurity, discharge from the first wash port on inner tube upper portion, the pond water level of growing seedlings is not less than the height of the no second wash port of inner tube when guaranteeing the drainage, avoids the manual work to forget to close the water and drains whole pond of growing seedlings.
In the invention, the diameter of the outer pipe is 50-90cm, and the diameter of the inner pipe is 40-60 cm; the first drainage hole is 10-20cm away from the top of the inner pipe; the second drain hole is 10-20cm away from the bottom of the outer pipe. But not limited thereto, and those skilled in the art can make adjustments according to actual needs.
In the invention, the diameter of the water inlet pipe is 40-60 cm. In the present invention, the material of the water inlet pipe is not particularly limited, and may be any material known to those skilled in the art, and preferably, the material of the water inlet pipe is PVC.
In order to avoid pumping tail water discharged from the indoor seedling raising pond into the indoor seedling raising pond, the water pump and the second water discharge pipe are arranged in a diagonal line at the position where the tail water is discharged into the outdoor ecological pond.
In the invention, a detachable filter screen is arranged in the water inlet pipe to filter impurities and bait organisms in the water body pumped from the pond. And setting the mesh number of the detachable filter screen according to the development stage of the fish fries in the indoor fry rearing pond. When the fry is in the fry stage, the fry in the fry stage is small in size and small in mouth crack and can only eat rotifers, the mesh number of the detachable filter screen is 100 meshes, so that rotifers and unicellular algae smaller than 150 mu m can be filtered, copepods and other bait organisms larger than 150 mu m are left in the detachable filter screen, and the part of the bait organisms are periodically put into other breeding ponds for the ingestion of larger individual fries; when the fry is in the juvenile stage, the mesh number of the detachable filter screen is 30-50 meshes, so that rotifers and copepods in the pond can be pumped into the fry breeding pond for feeding the fry, and larger bait organisms left in the screen are fed to other individuals for eating. The screen is preferably, but not limited to, a silk screen.
And a fish blocking net for blocking grouper fries is arranged at the tail end of the second water drainage pipe. The fish blocking net is a bolting silk net with the mesh number of 50 meshes.
The specific structure of the hatching net cage refers to a large-scale seawater fish seedling breeding hatching net cage in CN203435544U, and details are not repeated herein.
It should be noted that, in the invention, the length and width of the hatching net cage are 1.5-2m, and the height is 1-1.5 m.
The method for constructing the outdoor ecological pond comprises the following steps:
(1) providing an outdoor pond, wherein an aerator is arranged in the outdoor pond;
(2) sterilizing the outdoor pond;
(3) carrying out pond water quality cultivation;
(4) and putting shrimp larvae, mackerel and trachinotus ovatus into the pond for mixed culture, and continuously regulating and controlling the water quality of the pond in the mixed culture process to maintain a balanced ecological environment.
In the step (1), the area of the outdoor pond is 2-5 mu, and the water surface of the pond is large, so that the water quality can be kept stable in abnormal weather.
In the present invention, the number of the oxygen increasing machines is not particularly limited, and those skilled in the art can adjust the number according to actual needs, and preferably, the number of the oxygen increasing machines is 2.
Preferably, the aerator is a waterwheel type aerator, is used for aerating and stirring the pond water.
In the step (2), the method for sterilizing the outdoor pond in the present invention is not particularly limited, and may be performed by a method known to those skilled in the art.
In the step (3), the pond water quality cultivation is operated according to the following steps: and inoculating and culturing the unicellular algae, the rotifers and the copepods in the pond in sequence.
Specifically, the unicellular algae is inoculated in the pond, a compound fertilizer is applied, and the unicellular algae is rapidly propagated by inflating the pond through the aerator and the air pump and irradiating sunlight; inoculating rotifer 7 days later; and inoculating copepods when the density of the rotifers is remarkably increased.
The unicellular algae can improve the water quality of the seedling raising pond and provide baits for rotifers and copepods in the seedling raising pond.
In the present invention, the rotifer is preferably, but not limited to, Brachionus plicatilis.
In the present invention, specific species of copepods are not particularly limited, and copepods known to those skilled in the art may be used, and preferably, the copepods are daphnia dentata (C)Schmackeria dubia) Ham Daphnia (Schw.), (Schmackeria poplesia) Chinese philosophy fleas (A)Calanus sinicus) (xi) slender HuataimenSinocalanus tenellus) Clematis chinensis (Sprenia gracilis) (III)Acartia clausi) At least one of (1).
It should be noted that the addition amount of the compound fertilizer and the inoculation amount of the chlamydomonas, rotifer and copepod are not particularly limited, and may be any conventional addition amount known to those skilled in the art, and those skilled in the art can select and adjust the addition amount according to actual production conditions.
In the step (4), when the number of rotifers and copepods in the pond reaches a peak value, putting shrimp larvae, maculownia siganus oramin and trachinotus ovatus into the pond for mixed culture; when the body length of the shrimp larvae is 0.5-0.8cm, putting artificial baits into the pond; the bait comprises probiotics and eel meal to form a microecological balance system mainly comprising the probiotics, chlamydomonas, rotifer and copepods.
In the present invention, the addition amount of the probiotics and the eel meal is not particularly limited, and may be a conventional addition amount well known to those skilled in the art, as long as a dynamic balance of the probiotics, algae phase and worms (rotifers and copepods) is formed, and those skilled in the art can select and adjust the addition amount according to actual production conditions.
The putting amount of the shrimp larvae is 20-50 ten thousand, the putting amount of the siganus oramin is 5000-minus, and the putting amount of the trachinotus ovatus is 200-minus 500-minus.
According to the invention, the siganus oramin is polycultured, so that macroalgae in the pond can be ingested, and the growth of enteromorpha is inhibited; through polyculture of trachinotus ovatus, the trachinotus ovatus can be fed to kill the disease to avoid spreading the disease, and the trachinotus ovatus is swim without swim bladder fish, can play a certain role in stirring the pond water and is beneficial to the growth of algae.
It should be noted that after the artificial bait is put in, a small amount of compound fertilizer can be properly sprinkled according to the density of the unicellular algae, so that the bacteria-algae-worms (rotifers, copepods and the like) in the pond form a relatively stable dynamic balance, thereby ensuring the sufficiency of the shrimp larvae bait.
In the invention, the early shrimp fries grow rapidly by ingesting bait organisms in the pond, and after the shrimp fries grow to 1.5-2cm, powdery No. 0 shrimp feed is fed, and the grown bait organisms of the shrimps cannot meet the ingestion requirement, at the moment, enough prawn feed is fed according to the growth of the shrimps, the density of probiotics-monadian algae-bait organisms in the pond is closely concerned, and the dynamic balance of the probiotics-monadian algae-bait organisms is kept.
The powdery shrimp feed No. 0 was obtained from a commercially available product.
According to the invention, the larval fish is directly opened in the hatching net cage, and SS type rotifers with sufficient density are provided as the opening bait, because the water in the hatching net cage is small, the small water body is easy to ensure the density of the opening bait, and the proper density of the opening bait is the key for whether the larval fish can be opened successfully or not in the initial hatching, so that the smooth opening of most of the larval fish in the opening period can be ensured at the first time.
After the larvae are opened, feeding SS type rotifers for feeding, wherein the diameter of the SS type rotifers is about 70-100 mu m, the feeding amount is mainly determined according to the water body of the hatching net cage and basically controlled to be 50-100/ml, and the density of the grouper larvae is 2-5 tails/ml; periodically sampling and microscopically observing, after the larvae are opened smoothly in the hatching net cage and ingested SS type rotifers can be observed in the stomach, periodically adding the small rotifers into the hatching net cage to ensure the rotifer density, after 1-2 days of opening period, the larvae grow rapidly and have large calibers which reach 150-, the fish fry is 5-10 fish fries/100 ml. And starting a water pump to pump water into the indoor seedling raising pond, controlling the flow rate, keeping the water level of the seedling raising pond to rise by 5 cm/day in the early stage, enabling the water level of the seedling raising pond to exceed the height of the inner pipe in the drainage pipe after 3-5 days, starting to discharge tail water of the seedling raising pond into the outdoor pond, and increasing the excrement, properly increasing the water inflow and increasing the circulation communication of indoor and outdoor water along with the seedling raising process. After 12-15 days of incubation, grouper fries begin to grow wings and enter the juvenile stage, the grouper fries grow fast and have large nutritional requirements, while the water inflow is increased, in addition, the copepods are collected in an outdoor pond for feeding, the density of the copepods is kept at 1-5 per ml, at the moment, the density can be reduced by selecting different ponds according to the number of the fries in a fry culture pond, so that the density of the grouper fries is kept at 1-5 per 100ml, the grouper fries are continuously cultured for about 30 days, the fries grow to be full of scales and metamorphosis to be juvenile fishes to reach the seedling emergence specification, and the fries are timely collected for sale, replaced in a pond and subjected to standard rough culture and the like. In actual production, if more emergence amount is pursued, the fry can be transformed into young fish fry through pulling a net before the young fish finishes collecting the wings (the dorsal fins and the ventral fin spines are shortened relative to the fish body) and grows full of scales, and the scale period in the process of raising the fry is also a relatively dangerous period, and the fry can be separately cultured and carefully raised to be thicker before the period so as to guarantee the survival rate of the fry.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (10)
1. A method for cultivating grouper is characterized by comprising the following steps:
constructing an indoor seedling raising pond and an outdoor ecological pond; the indoor seedling raising pond and the outdoor ecological pond are connected through a pipeline, so that water in the indoor seedling raising pond and water in the outdoor ecological pond can circularly flow;
installing an incubation net cage in the indoor seedling raising pond, and incubating fertilized eggs of the grouper through the incubation net cage to obtain larval fish;
after the fry are opened in the incubation net cage, feeding SS rotifers for feeding by the opening, and keeping the density of the SS rotifers in the water body of the incubation net cage to be 50-100/ml and the density of the fry to be 2-5 fish/ml;
when the caliber of the fry reaches 150-; rotifers are cultivated in the seedling raising pond, the density of the rotifers in the water body of the seedling raising pond is 10-20/ml, and the density of the larva fishes is 5-10 fish/100 ml.
2. The method for cultivating grouper as claimed in claim 1, wherein the indoor nursery pond comprises a pond body, a water outlet is arranged at the bottom of the pond body, the bottom of the pond body is inclined to the water outlet at the periphery of the pond body, and the inclination is 20-30 degrees; the side wall of the tank body is provided with a plurality of air inlet pipes which enable water in the tank body to rotate along the anticlockwise direction or the clockwise direction; the pipeline comprises a water drainage pipe and a water inlet pipe; the water discharge pipe is arranged at the water discharge port and used for circulating the water body in the indoor seedling raising pond to the outdoor ecological pond; the water inlet pipe is arranged above the pond body, a water pump is arranged on the water inlet pipe, and the water in the outdoor ecological pond is circulated to the indoor seedling raising pond through the water pump.
3. The method of claim 2, wherein the drain comprises a first drain and a second drain; the first water drainage pipe is arranged above the water outlet, and the second water drainage pipe is arranged below the water outlet; the first drain pipe comprises an outer pipe and an inner pipe which are sleeved with each other, a plurality of first drain holes are formed in the upper end of the inner pipe, a plurality of second drain holes are formed in the lower end of the outer pipe, the inner pipe is higher than the outer pipe, the first drain holes are located at a position lower than the height of the outer pipe, and a pipe orifice in the bottom of the inner pipe is communicated with the second drain pipes and is consistent in size.
4. The method for culturing grouper as claimed in claim 3, wherein the water pump and the second drain pipe are arranged diagonally at the position where they are discharged into the outdoor ecological pond; the air inlet pipe is arranged 50-100cm below the water surface of the pool body.
5. The method for culturing grouper as claimed in claim 2, wherein the tank body is a circular tank with a diameter of 5-8m and a depth of 1.5-2 m; be provided with detachable filter screen in the inlet tube, according to the developmental stage of fry sets up in the indoor pond of growing seedlings the mesh number of detachable filter screen: when the fry is in the fry stage, the mesh number of the detachable filter screen is 100 meshes; when the fry is in the juvenile stage, the mesh number of the detachable filter screen is 30-50 meshes; and a fish blocking net for blocking grouper fries is arranged at the tail end of the second water drainage pipe.
6. The method for culturing grouper as claimed in claim 3, wherein the diameter of the outer tube is 50-90cm, and the diameter of the inner tube is 40-60 cm; the first drainage hole is 10-20cm away from the top of the inner pipe; the second drain hole is 10-20cm away from the bottom of the outer pipe.
7. The method for cultivating grouper as claimed in claim 1, wherein the method for constructing an outdoor ecological pond comprises:
(1) providing an outdoor pond, wherein an aerator is arranged in the outdoor pond;
(2) sterilizing the outdoor pond;
(3) carrying out pond water quality cultivation;
(4) and putting shrimp larvae, mackerel and trachinotus ovatus into the pond for mixed culture, and continuously regulating and controlling the water quality of the pond in the mixed culture process to maintain a balanced ecological environment.
8. A method of cultivating grouper as claimed in claim 7, wherein said pond water cultivation is performed by the steps of: inoculating unicellular algae into the pond, applying a compound fertilizer, inflating by the aerator and the air pump and irradiating by sunlight to quickly propagate the unicellular algae; inoculating rotifer 7 days later; and inoculating copepods when the density of the rotifers is remarkably increased.
9. The method for culturing the groupers as claimed in claim 8, wherein the shrimp fries, mackerel and trachinotus ovatus are put into the pond for mixed culture when the number of the rotifers and copepods in the pond reaches a peak value; when the body length of the shrimp larvae is 0.5-0.8cm, putting artificial baits into the pond; the bait comprises eel meal and fish meal, and probiotics are splashed to form a microecological balance system mainly comprising probiotics, unicellular algae, rotifers and copepods; wherein the area of the outdoor pond is 2-5 mu; the putting amount of the shrimp larvae is 20-50 ten thousand, the putting amount of the siganus oramin is 5000-minus, and the putting amount of the trachinotus ovatus is 200-minus 500-minus.
10. The method of claim 9, further comprising: and when the body length of the shrimp larvae is 1.5-2cm, feeding No. 0 shrimp feed into the pond.
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