CN111727912A - Striped mullet seawater pond circulating water seedling raising method - Google Patents
Striped mullet seawater pond circulating water seedling raising method Download PDFInfo
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- 241001502129 Mullus Species 0.000 claims abstract description 24
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A—HUMAN NECESSITIES
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Abstract
The invention discloses a striped mullet seawater pond circulating water fry breeding method, which relates to the technical field of fry breeding, and comprises S1, construction of net cage circulating water fry breeding facilities, S2 and net cage circulating water fry breeding management, wherein S1 is subdivided into a and a fry breeding net cage is built; b. mounting a submersible pump; c. d, light-induced living organism bait and installing an inflating facility; s2 is subdivided into e and pond equipment for work; f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing live rotifers and feed; g. hatching the fry; h. management of the fry period; i. management in the juvenile fish stage and j and juvenile fish stage, the substeps h, i and j comprise control of the age of the fish and the cultivation density, feed feeding and replacement or cleaning of a net cage, aiming at the fry cultivation characteristics and life habits of the yellow eye , a fry cultivation technical mode is provided, and the method has the advantages of high density and strong controllability of a cement pond mode, low cost of the pond mode, easiness in popularization and the like.
Description
Technical Field
The invention relates to the technical field of fry breeding, in particular to a method for raising yellow-eye mullets by circulating water in a seawater pond.
Background
"yellow eye " is a Wenzhou common name, its scientific name is pike (Liza haematocochela), belonging to Mugiliformes, Mugilidae, mullet (Liza). The wide distribution type fishes are local fishes, are mainly distributed in China coastal areas, Korean peninsulas and Japan coastal areas, inhabit coastal shallow sea areas with the water depth not more than 10m, are also distributed in estuary freshwater areas, do not migrate for long distance, and are suitable for large-scale growth. The temperature range is-0.7-35 ℃, and the optimum temperature is 12-25 ℃; the salt tolerance range is 0-30, and the fish is suitable for living and growing in salty fresh water and even pure fresh water, and is important economic fish in coastal areas of China. In Jiangsu province, the artificial breeding and breeding industry of the pikes has been developed for many years, and the scale is large. The breeding modes are saline-alkali soil pond breeding, and the artificial breeding is carried out by an indoor cement pond seedling raising technical mode and a pond mode, or an early-stage cement pond mode and a middle-later-stage pond mode.
However, the conventional indoor cement pond seedling raising technical mode for seawater fishes has the advantages of high density and strong controllability, but has high facility requirements and high seedling raising cost, while the seawater fish pond seedling raising technical mode has the advantages of low cost and easiness in popularization, but has the problems of unstable seedling raising effect, low density and the like, and therefore, technical personnel in the field provide a yellow mullet seawater pond circulating water seedling raising method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a yellow-eye mullet seawater pond circulating water seedling raising method, which solves the problems that the conventional indoor cement pond seedling raising technical mode for seawater fishes has the advantages of high density and strong controllability, but has high facility requirement and high seedling raising cost, and the seawater fish pond seedling raising technical mode has the advantages of low cost and easiness in popularization, but has unstable seedling raising effect and low density and the like.
In order to achieve the purpose, the invention is realized by the following technical scheme: the method for raising the seedlings of the striped mullet seawater pond by circulating water comprises the following operation steps:
s1, constructing a net cage circulating water seedling raising facility: comprising the sub-steps of,
a. building a seedling net cage: building a main body structure of a moso bamboo shed frame at the position of a circular ditch of the pond, and hanging a seedling culture net cage under the main body structure;
b. installing a submersible pump, a circulating water pipeline and a plurality of valve faucet facilities: in the plurality of seedling raising net cages built in the substep a, the seedling raising net cages are divided into two groups according to the proportion of 1/2 numerical values of the total seedling raising net cage, 1 variable-frequency water-quantity-adjustable submersible pump with the power of 100W is installed in each group, and a circulating water pipeline is installed in each seedling raising net cage;
c. light-induced living organism bait: b, installing an LED lamp with the power of 2-4W above the moso bamboo canopy frame constructed in the substep a, starting at 4-6 points every day at regular time, closing after the moso bamboo canopy frame is lighted, luring living biological baits to be gathered in the moso bamboo canopy frame through light, and distributing the goods elevator biological baits into each seedling net box along with water flow through the submersible pump arranged in the substep b so as to feed fishes;
d. installing an inflating facility: in the substep b, each group is provided with 1 inflator pump with power of 55-65W, the inflator pumps are suspended in facility equipment working platforms at the sides of the aisle net cages, the inflator pumps are connected with inflator pipes, the inflator pipes are distributed in each seedling raising net cage along the aisle, the inflation time period of the inflator pumps is controlled by a timer, and the time period is set as 6-morning continuous inflation;
s2, cage circulating water seedling raising management: comprising the sub-steps of,
e. the pond equipment works: the pond cage circulating water does not need to be subjected to pond cleaning treatment before seedling raising, the pond is required to be ecological culture of low-density fishes, shrimps and shellfish or no culture variety, the pond needs to keep a higher water level, and the water depth of a pond cage seedling raising area is kept to be more than 2 m;
f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing living rotifers and feeds, wherein the living rotifers need to be conveyed through an oxygenated nylon foam box, the feeds comprise seawater fish fry microparticle feeds and fish fry feeds No. 01, No. 02 and No. 0, the water temperature of a pond is stabilized to be above 14-16 ℃ during the last ten days of 4 months to the last ten days of 5 months, and obtaining fertilized eggs of the mullets through artificial induced spawning;
g. fry hatching: putting the obtained fertilized eggs of the mullets in the substep e into a seedling net box, and hatching and raising seedlings in an original box;
h. management of the fry period: comprising the sub-steps of,
h1, controlling the day age and breeding density of the larval fish: controlling the day age of the larval fish to be 1-15 days, and the breeding density to be 0.5-1.5 ten thousand tails/m3；
h2, feeding: after 3 days of fry incubation, feeding rotifers, opening the cage for feeding, checking the quantity of the rotifers in the water in the inner pond and the outer pond of the net cage by using a microscope every day, and observing the feeding condition by combining with the shooting of fish fries and naked eyes;
h3, replacing net cages: replacing the seedling raising net cage in the previous substep g with a seedling raising net cage with 40 meshes after one week;
i. management in the juvenile fish stage: comprising the sub-steps of,
i1, controlling the date age and cultivation density of the juvenile fish: controlling the day age of the juvenile fish to be 16-35 days, and the cultivation density to be 0.1-0.5 ten thousand tails/m3；
i2, feeding: keeping the circulation pump working for 24 hours, bringing a large amount of copepods and nauplii thereof into a net cage of a fry raising area for feeding fries, and supplementing and feeding the sea fish fry micro-particle feed in the substep f for 2-4 times every day;
i3, cleaning and replacing net cages: lifting one side of the net cage out of the water surface every 3-5 days, brushing the net cage by using a hard brush or directly washing the net cage by using a high-pressure water gun, and replacing the net cage with the same mesh if the net cage is seriously blocked;
i4, water quality management: changing water 1/3-1/5 every other week or changing water 1/3-1/2 every 15 days.
J: management in the juvenile fish stage: comprising the sub-steps of,
j1, controlling the day age and breeding density of the juvenile fish: the day age of the juvenile fish is controlled to be 34-36 days, and the breeding density is controlled to be 0.1-0.2 ten thousand tails/m3；
j2, feeding: feeding the fry feed No. 02 and No. 0 in the substep f for the whole fry to be ingested for 2-4 times every day;
j3, cage cleaning and replacement: the original 40-mesh seedling raising box is replaced by a 10-mesh seedling raising box, one side of the net cage is lifted out of the water surface every other week, and the net cage is washed by a high-pressure water gun to keep smooth water exchange between the inner net cage and the outer net cage. The fry can be drained and fished by a fishing net, and the fry is accurately weighed, counted and separated into boxes.
Preferably, the moso bamboo canopy frame in the substep a is built in a dry-shaped structure along the pond annular trench, the height between the whole moso bamboo canopy frame and the bottom of the pond annular trench is 2.1-2.3m and 0.1-0.3m higher than the water surface of the pond, the distance between two shapes of the dry-shaped moso bamboo canopy frame is 3.9-4.1m, a plurality of seedling raising net cages are arranged and are all hung between the two-shaped structures, the distance between a net of the seedling raising net cage and the bottom of the pond is 0.4-0.6m, and the mesh of the seedling raising net cage is any one of 80 meshes, 40 meshes and 10 meshes;
in the sub-step b, the flow rate of the submersible pump is 6000L-10000L/h, a circulating water pipeline adopts the combination of a PVC hard pipe and a PVC fiber reticulate pattern hose, and each seedling net cage is provided with a branch pipe with the diameter of 25cm and a plurality of valve taps in the circulating water pipeline;
in the substep d, the displacement of the inflator pump is 75-85L/min, and 2-4 inflatable stones are suspended in each seedling net box.
Preferably, in the substep g, the net cage for hatching the fish eggs is 80 meshes, the water flow of the submersible pump is micro water flow, a large amount of inflation is carried out by using an inflator pump during the hatching period, after the fish fries are hatched, the inflation amount of the inflator pump is adjusted to be micro inflation, the salinity of the pond is controlled to be 10-20, and the water temperature is controlled to be 16-22 ℃.
Preferably, in the sub-step h2, a small part of the rotifers are fed into the net cage of the fry, and a large part of the rotifers are inoculated into the whole pond.
Preferably, in the substep i3, when the net cage is cleaned or replaced, the fry is taken as a water box, when the full length of the fry is more than 2cm, a soft 60-mesh fishing net is used for collecting the fry and taking the fry as water for fish box collection, so that the fry cultivation density is reduced.
Preferably, in the substep j1, fry in the juvenile fish stage are continuously cultured in circulating water of the pond net cage, and the fry can be also subjected to oxygen filling or open type gas-filled transportation after being trained by pulling the net and sold to farmers for mullet culture production or proliferation and releasing.
Advantageous effects
The invention provides a striped mullet seawater pond circulating water seedling raising method. Compared with the prior art, the method has the following beneficial effects:
1. a yellow-eye seawater pond net cage circulating water seedling raising technical mode is developed aiming at the fry breeding characteristics and life habits of yellow-eye , and has the advantages of high density and strong controllability of a cement pond mode, low cost and easiness in popularization of the pond mode, the pond seedling raising mode needs to cultivate rotifer, copepods and other bait organisms before seedling raising, proper bait abundance is kept in a seedling raising period, if the cultivation and control of the rotifer and other bait organisms are not well kept, due to the fact that a pond is large, the fries are small and low in density, and are difficult to manually feed a large amount of expensive seedling raising corpuscle feeds for supplement and solution, the pond seedling raising is likely to fail. Because the uncontrollable performance of bait organisms such as rotifers, copepods and the like cultured in the pond is very large, the conventional pond fish seedling raising effect is unstable and the uncontrollable performance is strong. According to the seedling raising method, under the condition that the bait organisms such as pond rotifers and the like are not well cultivated, the seedling raising corpuscle feed can be manually fed in the high-density net cage seedling raising area to supplement and solve the problem of insufficient bait organisms in the pond.
2. A method for breeding fries of striped mullets in seawater pond by circulating water comprises the steps that more than 90% of the pond in a pond cage circulating water fry breeding mode is a water quality ecological purification and living body bait organism production area, a large amount of bait organisms such as rotifers, copepods and the like can be bred and cultured, continuous water pump pumping circulation is carried out, and the living body bait organisms are continuously fed into the cage fry breeding area for feeding of fries. The permeability and the water circulation of the net cage can also keep the same water quality of the net cage seedling raising area and the pond, the self-purification capacity of the ecological pond water quality purification area can keep better water quality of the whole pond, and daily sewage suction and water change work in a cement pond seedling raising mode is not needed. Through the ecological purification of water quality and the production area of living bait organisms in the area which accounts for more than 90 percent of the pond, the bait organisms are automatically propagated and the water quality is maintained, the fry breeding process flow is simplified, and the fry breeding production cost is reduced.
Drawings
FIG. 1 is a schematic block diagram of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides three technical solutions:
example 1
The method for raising the seedlings of the striped mullet seawater pond by circulating water comprises the following operation steps:
s1, constructing a net cage circulating water seedling raising facility: comprising the sub-steps of,
a. building a seedling net cage: building a main body structure of a moso bamboo shed frame at the position of a circular ditch of the pond, and hanging a seedling culture net cage under the main body structure;
b. installing a submersible pump, a circulating water pipeline and a plurality of valve faucet facilities: in the plurality of seedling raising net cages built in the substep a, the seedling raising net cages are divided into two groups according to the proportion of 1/2 numerical values of the total seedling raising net cage, 1 variable-frequency water-quantity-adjustable submersible pump with the power of 100W is installed in each group, and a circulating water pipeline is installed in each seedling raising net cage;
c. light-induced living organism bait: an LED lamp with the power of 2W is installed above the moso bamboo canopy frame built in the substep a, the LED lamp is started at 4 points every day at regular time and is closed after the moso bamboo canopy frame is lighted, living biological baits are attracted to be gathered in the moso bamboo canopy frame through light, and the biological baits of the goods elevator are distributed into each seedling net box along with water flow through the submersible pump arranged in the substep b to be supplied to fishes for feeding;
d. installing an inflating facility: in the substep b, each group is provided with 1 inflator pump with power of 55W, the inflator pumps are suspended in facility equipment working platforms at the sides of the aisle net cages, the inflator pumps are connected with inflator tubes, the inflator tubes are distributed in each seedling net cage along the aisle, the inflation time period of the inflator pumps is controlled by a timer, and the time period is set as 6 o 'clock-6 o' clock continuous inflation;
s2, cage circulating water seedling raising management: comprising the sub-steps of,
e. the pond equipment works: the pond cage circulating water does not need to be subjected to pond cleaning treatment before seedling raising, the pond is required to be ecological culture of low-density fishes, shrimps and shellfish or no culture variety, the pond needs to keep a higher water level, and the water depth of a pond cage seedling raising area is kept to be more than 2 m;
f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing living rotifers and feeds, wherein the living rotifers need to be conveyed through an oxygenated nylon foam box, the feeds comprise seawater fish fry microparticle feeds and fish fry feeds No. 01, No. 02 and No. 0, the water temperature of the pond is stabilized to be above 14 ℃ in the last ten days of 4 months to the last ten days of 5 months, and obtaining mullet fertilized eggs through artificial induced spawning;
g. fry hatching: putting the obtained fertilized eggs of the mullets in the substep e into a seedling net box, and hatching and raising seedlings in an original box;
h. management of the fry period: comprising the sub-steps of,
h1, controlling the day age and breeding density of the larval fish: the day age of the larval fish is controlled to be 1 day, and the breeding density is controlled to be 0.5 ten thousand tails/m3；
h2, feeding: after 3 days of fry incubation, feeding rotifers, opening the cage for feeding, checking the quantity of the rotifers in the water in the inner pond and the outer pond of the net cage by using a microscope every day, and observing the feeding condition by combining with the shooting of fish fries and naked eyes;
h3, replacing net cages: replacing the seedling raising net cage in the previous substep g with a seedling raising net cage with 40 meshes after one week;
i. management in the juvenile fish stage: comprising the sub-steps of,
i1, controlling the date age and cultivation density of the juvenile fish: the day age of the juvenile fish is controlled to be 16 days, and the cultivation density is 0.1 ten thousand tails/m3；
i2, feeding: keeping the circulation pump working for 24 hours, bringing a large amount of copepods and nauplii thereof into a net cage of a fry raising area for feeding fries, and supplementing and feeding the sea fish fry micro-particle feed in the substep f for 2 times every day;
i3, cleaning and replacing net cages: lifting one side of the net cage out of the water surface every 3 days, brushing the net cage by using a hard brush or directly washing the net cage by using a high-pressure water gun, and replacing the net cage with the same mesh if the net cage is seriously blocked;
i4, water quality management: water 1/3 was changed every other week or 1/3 was changed every 15 days.
J: management in the juvenile fish stage: comprising the sub-steps of,
j1, controlling the day age and breeding density of the juvenile fish: the day age of the juvenile fish is controlled to be 34 days, and the breeding density is controlled to be 0.1 ten thousand tails/m3；
j2, feeding: feeding the fry feed No. 02 and No. 0 in the substep f for the whole fry to be ingested for 2-4 times every day;
j3, cage cleaning and replacement: the original 40-mesh seedling raising box is replaced by a 10-mesh seedling raising box, one side of the net cage is lifted out of the water surface every other week, and the net cage is washed by a high-pressure water gun to keep smooth water exchange between the inner net cage and the outer net cage. The fry can be drained and fished by a fishing net, and the fry is accurately weighed, counted and separated into boxes.
Furthermore, the moso bamboo canopy frame in the substep a is built in a dry-shaped structure along the pond annular ditch, the height between the whole moso bamboo canopy frame and the bottom of the pond annular ditch is 2.1m and is 0.1m higher than the water surface of the pond, the distance between the two shapes of the dry-shaped moso bamboo canopy frame is 3.9m, a plurality of seedling raising net cages are arranged and are all hung between the two shapes of the pond annular ditch, and the distance between the net coat of the seedling raising net cage and the bottom of the pond is 0.4 m;
furthermore, the flow rate of the submersible pump in the substep b is 6000L/h, the circulating water pipeline adopts the combination of a PVC hard pipe and a PVC fiber reticulate pattern hose, and each seedling net cage is provided with a branch pipe with the diameter of 25cm and a plurality of valve taps in the circulating water pipeline;
further, in the substep d, the displacement of the inflator pump was 75L/min, and 2 inflatable stones were suspended in each seedling net cage.
Further, in the substep g, the net cage for hatching the fish eggs is 80 meshes, the water flow of the submersible pump is micro water flow, a large amount of inflation is carried out by using an inflator pump during the hatching period, after the fish fries are hatched, the inflation amount of the inflator pump is adjusted to be micro inflation, the salinity of the pond is controlled to be 10, and the water temperature is controlled to be 16 ℃.
Further, in the substep h2, a small part of rotifers is fed into the fry net cage, and a large part of rotifers is inoculated into the whole pond.
Further, in the substep i3, when the net cage is cleaned or replaced, the fry is carried with water and collected by a soft 60-mesh fishing net and fished with water and separated into boxes when the whole length of the fry is more than 2cm, so that the fry breeding density is reduced.
Further, in the substep j1, fry in the juvenile fish stage are continuously cultured in circulating water of the pond net cage, and the fry can be also subjected to oxygen filling or open type gas-filled transportation after being trained by pulling the net and sold to farmers for mullet culture production or proliferation and releasing.
Example 2
The method for raising the seedlings of the striped mullet seawater pond by circulating water comprises the following operation steps:
s1, constructing a net cage circulating water seedling raising facility: comprising the sub-steps of,
a. building a seedling net cage: building a main body structure of a moso bamboo shed frame at the position of a circular ditch of the pond, and hanging a seedling culture net cage under the main body structure;
b. installing a submersible pump, a circulating water pipeline and a plurality of valve faucet facilities: in the plurality of seedling raising net cages built in the substep a, the seedling raising net cages are divided into two groups according to the proportion of 1/2 numerical values of the total seedling raising net cage, 1 variable-frequency water-quantity-adjustable submersible pump with the power of 100W is installed in each group, and a circulating water pipeline is installed in each seedling raising net cage;
c. light-induced living organism bait: a 4W LED lamp is arranged above the moso bamboo canopy frame constructed in the substep a, is started at 6 points every day at regular time, is closed after the moso bamboo canopy frame is lightened, attracts living biological baits to gather in the moso bamboo canopy frame through light, and divides the biological baits of the goods elevator into each seedling net box along with water flow through a submersible pump arranged in the substep b so as to feed fishes;
d. installing an inflating facility: in the substep b, each group is provided with 1 inflator pump with the power of 65W, the inflator pumps are suspended in facility equipment working platforms at the sides of the aisle net cages, the inflator pumps are connected with inflator tubes, the inflator tubes are distributed in each seedling raising net cage along the aisle, the inflation time period of the inflator pumps is controlled by a timer, and the time period is set as 6 o 'clock-6 o' clock continuous inflation;
s2, cage circulating water seedling raising management: comprising the sub-steps of,
e. the pond equipment works: the pond cage circulating water does not need to be subjected to pond cleaning treatment before seedling raising, the pond is required to be ecological culture of low-density fishes, shrimps and shellfish or no culture variety, the pond needs to keep a higher water level, and the water depth of a pond cage seedling raising area is kept to be more than 2 m;
f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing living rotifers and feeds, wherein the living rotifers need to be conveyed through an oxygenated nylon foam box, the feeds comprise seawater fish fry microparticle feeds and fish fry feeds No. 01, No. 02 and No. 0, the water temperature of the pond is stabilized to be more than 16 ℃ in the period from the last ten days of 4 months to the last ten days of 5 months, and obtaining mullet fertilized eggs through artificial induced spawning;
g. fry hatching: putting the obtained fertilized eggs of the mullets in the substep e into a seedling net box, and hatching and raising seedlings in an original box;
h. management of the fry period: comprising the sub-steps of,
h1, controlling the day age and breeding density of the larval fish: the day age of the larval fish is controlled to be 15 days, and the breeding density is 1.5 ten thousand tails/m3；
h2, feeding: after 3 days of fry incubation, feeding rotifers, opening the cage for feeding, checking the quantity of the rotifers in the water in the inner pond and the outer pond of the net cage by using a microscope every day, and observing the feeding condition by combining with the shooting of fish fries and naked eyes;
h3, replacing net cages: replacing the seedling raising net cage in the previous substep g with a seedling raising net cage with 40 meshes after one week;
i. management in the juvenile fish stage: comprising the sub-steps of,
i1, controlling the date age and cultivation density of the juvenile fish: the day age of the juvenile fish is controlled to be 35 days, and the cultivation density is 0.5 ten thousand tails/m3；
i2, feeding: keeping the circulation pump working for 24 hours, bringing a large amount of copepods and nauplii thereof into a net cage of a fry raising area for feeding fries, and supplementing and feeding the sea fish fry micro-particle feed in the substep f for 4 times every day;
i3, cleaning and replacing net cages: lifting one side of the net cage out of the water surface every 5 days, brushing the net cage by using a hard brush or directly washing the net cage by using a high-pressure water gun, and replacing the net cage with the same mesh if the net cage is seriously blocked;
i4, water quality management: water 1/5 was changed every other week or 1/2 was changed every 15 days.
J: management in the juvenile fish stage: comprising the sub-steps of,
j1, controlling the day age and breeding density of the juvenile fish: the day age of the juvenile fish is controlled to be 36 days, and the breeding density is controlled to be 0.2 ten thousand tails/m3；
j2, feeding: feeding the fry feed No. 02 and No. 0 in the substep f for all feeding of the fry for 4 times every day;
j3, cage cleaning and replacement: the original 40-mesh seedling raising box is replaced by a 10-mesh seedling raising box, one side of the net cage is lifted out of the water surface every other week, and the net cage is washed by a high-pressure water gun to keep smooth water exchange between the inner net cage and the outer net cage. The fry can be drained and fished by a fishing net, and the fry is accurately weighed, counted and separated into boxes.
Furthermore, the moso bamboo canopy frame in the substep a is built in a dry-shaped structure along the pond annular ditch, the height between the whole moso bamboo canopy frame and the bottom of the pond annular ditch is 2.3m and is 0.3m higher than the water surface of the pond, the distance between the two shapes of the dry-shaped moso bamboo canopy frame is 4.1m, a plurality of seedling raising net cages are arranged and are all hung between the two shapes of the pond annular ditch, and the distance between the net coat of the seedling raising net cage and the bottom of the pond is 0.6 m;
furthermore, the submersible pump in the substep b has a flow rate of 10000L/h, the circulating water pipeline adopts a combination of a PVC hard pipe and a PVC fiber reticulate pattern hose, and each seedling net cage is provided with a branch pipe with a diameter of 25cm and a plurality of valve taps in the circulating water pipeline;
further, in the substep d, the displacement of the inflator pump was 85L/min, and 4 inflatable stones were suspended in each seedling net cage.
Further, in the substep g, the net cage for hatching the fish eggs is 80 meshes, the water flow of the submersible pump is micro water flow, a large amount of inflation is carried out by using an inflator pump during the hatching period, after the fish fries are hatched, the inflation amount of the inflator pump is adjusted to be micro inflation, the salinity of the pond is controlled to be 20, and the water temperature is controlled to be 22 ℃.
Further, in the substep h2, a small part of rotifers is fed into the fry net cage, and a large part of rotifers is inoculated into the whole pond.
Further, in the substep i3, when the net cage is cleaned or replaced, the fry is carried with water and collected by a soft 60-mesh fishing net and fished with water and separated into boxes when the whole length of the fry is more than 2cm, so that the fry breeding density is reduced.
Further, in the substep j1, fry in the juvenile fish stage are continuously cultured in circulating water of the pond net cage, and the fry can be also subjected to oxygen filling or open type gas-filled transportation after being trained by pulling the net and sold to farmers for mullet culture production or proliferation and releasing.
Example 3
The method for raising the seedlings of the striped mullet seawater pond by circulating water comprises the following operation steps:
s1, constructing a net cage circulating water seedling raising facility: comprising the sub-steps of,
a. building a seedling net cage: building a main body structure of a moso bamboo shed frame at the position of a circular ditch of the pond, and hanging a seedling culture net cage under the main body structure;
b. installing a submersible pump, a circulating water pipeline and a plurality of valve faucet facilities: in the plurality of seedling raising net cages built in the substep a, the seedling raising net cages are divided into two groups according to the proportion of 1/2 numerical values of the total seedling raising net cage, 1 variable-frequency water-quantity-adjustable submersible pump with the power of 100W is installed in each group, and a circulating water pipeline is installed in each seedling raising net cage;
c. light-induced living organism bait: an LED lamp with power of 3W is installed above the moso bamboo canopy frame built in the substep a, the LED lamp is started at 5 points every day at regular time, and is closed after the moso bamboo canopy frame is lighted, living biological baits are attracted to be gathered in the moso bamboo canopy frame through light, and the biological baits of the goods elevator are distributed into each seedling net box along with water flow through the submersible pump arranged in the substep b to be supplied to fishes for feeding;
d. installing an inflating facility: in the substep b, each group is provided with 1 inflator pump with the power of 60W, the inflator pumps are suspended in facility equipment working platforms at the sides of the aisle net cages, the inflator pumps are connected with inflator tubes, the inflator tubes are distributed in each seedling raising net cage along the aisle, the inflation time period of the inflator pumps is controlled by a timer, and the time period is set as 6 o 'clock-6 o' clock continuous inflation;
s2, cage circulating water seedling raising management: comprising the sub-steps of,
e. the pond equipment works: the pond cage circulating water does not need to be subjected to pond cleaning treatment before seedling raising, the pond is required to be ecological culture of low-density fishes, shrimps and shellfish or no culture variety, the pond needs to keep a higher water level, and the water depth of a pond cage seedling raising area is kept to be more than 2 m;
f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing living rotifers and feeds, wherein the living rotifers need to be conveyed through an oxygenated nylon foam box, the feeds comprise seawater fish fry microparticle feeds and fish fry feeds No. 01, No. 02 and No. 0, the water temperature of the pond is stabilized to be above 15 ℃ in the last ten days of 4 months to the last ten days of 5 months, and obtaining mullet fertilized eggs through artificial induced spawning;
g. fry hatching: putting the obtained fertilized eggs of the mullets in the substep e into a seedling net box, and hatching and raising seedlings in an original box;
h. management of the fry period: comprising the sub-steps of,
h1, controlling the day age and breeding density of the larval fish: the day age of the larval fish is controlled to be 7 days, and the breeding density is 1.0 ten thousand tails/m3；
h2, feeding: after 3 days of fry incubation, feeding rotifers, opening the cage for feeding, checking the quantity of the rotifers in the water in the inner pond and the outer pond of the net cage by using a microscope every day, and observing the feeding condition by combining with the shooting of fish fries and naked eyes;
h3, replacing net cages: replacing the seedling raising net cage in the previous substep g with a seedling raising net cage with 40 meshes after one week;
i. management in the juvenile fish stage: comprising the sub-steps of,
i1, controlling the date age and cultivation density of the juvenile fish: the day age of the juvenile fish is controlled to be 25 days, and the cultivation density is controlled to be 0.7 ten thousand tails/m3；
i2, feeding: keeping the circulation pump working for 24 hours, bringing a large amount of copepods and nauplii thereof into a net cage of a fry raising area for feeding fries, and supplementing and feeding the sea fish fry micro-particle feed in the substep f for 3 times every day;
i3, cleaning and replacing net cages: lifting one side of the net cage out of the water surface every 4 days, brushing the net cage by using a hard brush or directly washing the net cage by using a high-pressure water gun, and replacing the net cage with the same mesh if the net cage is seriously blocked;
i4, water quality management: water 1/4 was changed every other week or 1/2 was changed every 15 days.
J: management in the juvenile fish stage: comprising the sub-steps of,
j1, controlling the day age and breeding density of the juvenile fish: the day age of the juvenile fish is controlled to be 35 days, and the breeding density is controlled to be 0.15 ten thousand tails/m3；
j2, feeding: feeding the fry feed No. 02 and No. 0 in the substep f for all feeding of the fry for 3 times every day;
j3, cage cleaning and replacement: the original 40-mesh seedling raising box is replaced by a 10-mesh seedling raising box, one side of the net cage is lifted out of the water surface every other week, and the net cage is washed by a high-pressure water gun to keep smooth water exchange between the inner net cage and the outer net cage. The fry can be drained and fished by a fishing net, and the fry is accurately weighed, counted and separated into boxes.
Furthermore, the moso bamboo canopy frame in the substep a is built in a dry-shaped structure along the pond annular ditch, the height between the whole moso bamboo canopy frame and the bottom of the pond annular ditch is 2.2m and is 0.2m higher than the water surface of the pond, the distance between the two shapes of the dry-shaped moso bamboo canopy frame is 4.0m, a plurality of seedling raising net cages are arranged and are all hung between the two shapes of the pond annular ditch, and the distance between the net coat of the seedling raising net cage and the bottom of the pond is 0.5 m;
furthermore, the submersible pump in the substep b has a flow rate of 8000L/h, the circulating water pipeline adopts a combination of PVC hard pipes and PVC fiber reticulate pattern hoses, and each seedling raising net cage is provided with a branch pipe with a diameter of 25cm and a plurality of valve taps in the circulating water pipeline;
further, in the substep d, the displacement of the inflator pump was 80L/min, and 3 inflatable stones were suspended in each seedling net cage.
Further, in the substep g, the net cage for hatching the fish eggs is 80 meshes, the water flow of the submersible pump is micro water flow, a large amount of inflation is carried out by using an inflator pump during the hatching period, after the fish fries are hatched, the inflation amount of the inflator pump is adjusted to be micro inflation, the salinity of the pond is controlled to be 15, and the water temperature is controlled to be 20 ℃.
Further, in the substep h2, a small part of rotifers is fed into the fry net cage, and a large part of rotifers is inoculated into the whole pond.
Further, in the substep i3, when the net cage is cleaned or replaced, the fry is carried with water and collected by a soft 60-mesh fishing net and fished with water and separated into boxes when the whole length of the fry is more than 2cm, so that the fry breeding density is reduced.
Further, in the substep j1, fry in the juvenile fish stage are continuously cultured in circulating water of the pond net cage, and the fry can be also subjected to oxygen filling or open type gas-filled transportation after being trained by pulling the net and sold to farmers for mullet culture production or proliferation and releasing.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The method for raising seedlings in the striped mullet seawater pond by circulating water is characterized by comprising the following operation steps:
s1, constructing a net cage circulating water seedling raising facility: comprising the sub-steps of,
a. building a seedling net cage: building a main body structure of a moso bamboo shed frame at the position of a circular ditch of the pond, and hanging a seedling culture net cage under the main body structure;
b. installing a submersible pump, a circulating water pipeline and a plurality of valve faucet facilities: in the plurality of seedling raising net cages built in the substep a, the seedling raising net cages are divided into two groups according to the proportion of 1/2 numerical values of the total seedling raising net cage, 1 variable-frequency water-quantity-adjustable submersible pump with the power of 100W is installed in each group, and a circulating water pipeline is installed in each seedling raising net cage;
c. light-induced living organism bait: b, installing an LED lamp with the power of 2-4W above the moso bamboo canopy frame constructed in the substep a, starting at 4-6 points every day at regular time, closing after the moso bamboo canopy frame is lighted, luring living biological baits to be gathered in the moso bamboo canopy frame through light, and distributing the goods elevator biological baits into each seedling net box along with water flow through the submersible pump arranged in the substep b so as to feed fishes;
d. installing an inflating facility: in the substep b, each group is provided with 1 inflator pump with power of 55-65W, the inflator pumps are suspended in facility equipment working platforms at the sides of the aisle net cages, the inflator pumps are connected with inflator pipes, the inflator pipes are distributed in each seedling raising net cage along the aisle, the inflation time period of the inflator pumps is controlled by a timer, and the time period is set as 6-morning continuous inflation;
s2, cage circulating water seedling raising management: comprising the sub-steps of,
e. the pond equipment works: the pond cage circulating water does not need to be subjected to pond cleaning treatment before seedling raising, the pond is required to be ecological culture of low-density fishes, shrimps and shellfish or no culture variety, the pond needs to keep a higher water level, and the water depth of a pond cage seedling raising area is kept to be more than 2 m;
f. preparing living rotifers, feed and fertilized eggs of mullets: purchasing living rotifers and feeds, wherein the living rotifers need to be conveyed through an oxygenated nylon foam box, the feeds comprise seawater fish fry microparticle feeds and fish fry feeds No. 01, No. 02 and No. 0, the water temperature of a pond is stabilized to be above 14-16 ℃ during the last ten days of 4 months to the last ten days of 5 months, and obtaining fertilized eggs of the mullets through artificial induced spawning;
g. fry hatching: putting the obtained fertilized eggs of the mullets in the substep e into a seedling net box, and hatching and raising seedlings in an original box;
h. management of the fry period: comprising the sub-steps of,
h1, controlling the day age and breeding density of the larval fish: controlling the day age of the larval fish to be 1-15 days, and the breeding density to be 0.5-1.5 ten thousand tails/m3；
h2, feeding: after 3 days of fry incubation, feeding rotifers, opening the cage for feeding, checking the quantity of the rotifers in the water in the inner pond and the outer pond of the net cage by using a microscope every day, and observing the feeding condition by combining with the shooting of fish fries and naked eyes;
h3, replacing net cages: replacing the seedling raising net cage in the previous substep g with a seedling raising net cage with 40 meshes after one week;
i. management in the juvenile fish stage: comprising the sub-steps of,
i1, controlling the date age and cultivation density of the juvenile fish: controlling the day age of the juvenile fish to be 16-35 days, and the cultivation density to be 0.1-0.5 ten thousand tails/m3；
i2, feeding: keeping the circulation pump working for 24 hours, bringing a large amount of copepods and nauplii thereof into a net cage of a fry raising area for feeding fries, and supplementing and feeding the sea fish fry micro-particle feed in the substep f for 2-4 times every day;
i3, cleaning and replacing net cages: lifting one side of the net cage out of the water surface every 3-5 days, brushing the net cage by using a hard brush or directly washing the net cage by using a high-pressure water gun, and replacing the net cage with the same mesh if the net cage is seriously blocked;
i4, water quality management: changing water 1/3-1/5 every other week or changing water 1/3-1/2 every 15 days.
J: management in the juvenile fish stage: comprising the sub-steps of,
j1, controlling the day age and breeding density of the juvenile fish: the day age of the juvenile fish is controlled to be 34-36 days, and the breeding density is controlled to be 0.1-0.2 ten thousand tails/m3；
j2, feeding: feeding the fry feed No. 02 and No. 0 in the substep f for the whole fry to be ingested for 2-4 times every day;
j3, cage cleaning and replacement: the original 40-mesh seedling raising box is replaced by a 10-mesh seedling raising box, one side of the net cage is lifted out of the water surface every other week, and the net cage is washed by a high-pressure water gun to keep smooth water exchange between the inner net cage and the outer net cage. The fry can be drained and fished by a fishing net, and the fry is accurately weighed, counted and separated into boxes.
2. The striped mullet seawater pond circulating water seedling raising method according to claim 1, wherein the moso bamboo canopy frame in the substep a is built in a dry-shaped structure along the pond annular trench, the height of the whole moso bamboo canopy frame and the bottom of the pond annular trench is 2.1-2.3m and 0.1-0.3m higher than the water surface of the pond, the distance between the two shapes of the dry-shaped moso bamboo canopy frame is 3.9-4.1m, the seedling raising net cages are provided and are all suspended between the two shapes, the distance between the netting of the seedling raising net cage and the bottom of the pond is 0.4-0.6m, and the mesh of the seedling raising net cage is any one of 80 meshes, 40 meshes and 10 meshes;
in the sub-step b, the flow rate of the submersible pump is 6000L-10000L/h, a circulating water pipeline adopts the combination of a PVC hard pipe and a PVC fiber reticulate pattern hose, and each seedling net cage is provided with a branch pipe with the diameter of 25cm and a plurality of valve taps in the circulating water pipeline;
in the substep d, the displacement of the inflator pump is 75-85L/min, and 2-4 inflatable stones are suspended in each seedling net box.
3. The method for raising fries in striped mullet seawater ponds by circulating water according to claim 1, wherein in the substep g, the net cage for hatching roes is 80 meshes, the water flow of the submersible pump is micro water flow, a large amount of air is filled by the air pump during hatching, after the fries are hatched, the air filling amount of the air pump is adjusted to micro air, the salinity of the pond is controlled to be 10-20, and the water temperature is controlled to be 16-22 ℃.
4. The striped mullet seawater pond circulating water seedling raising method as claimed in claim 1, wherein in the sub-step h2, a small part of rotifers are fed into the fry net box, and a large part of rotifers are inoculated into the whole pond.
5. The method for raising fries in the striped mullet seawater pond by circulating water according to claim 1, wherein in the substep i3, the fries are taken with water and separated when the net cages are cleaned or replaced, and when the total length of the fries is more than 2cm, the fries are collected by a soft 60-mesh fishing net and taken with water and separated, so that the fry raising density is reduced.
6. The method for raising mullet yellow-eye seawater pond seedlings by circulating water, according to claim 1, wherein in the substep j1, the fries in the juvenile fish stage are continuously raised in the pond cage circulating water, and can be sold to farmers for mullet culture production or proliferation and release after being trained by pulling a nylon bag for oxygen inflation or open inflation transportation.
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