CN105994100B - Seawater fish seedling raising device and method - Google Patents
Seawater fish seedling raising device and method Download PDFInfo
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- CN105994100B CN105994100B CN201610414942.3A CN201610414942A CN105994100B CN 105994100 B CN105994100 B CN 105994100B CN 201610414942 A CN201610414942 A CN 201610414942A CN 105994100 B CN105994100 B CN 105994100B
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- 241000251468 Actinopterygii Species 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000013535 sea water Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000010865 sewage Substances 0.000 claims abstract description 19
- 238000009395 breeding Methods 0.000 claims abstract description 18
- 230000001488 breeding effect Effects 0.000 claims abstract description 16
- 239000003337 fertilizer Substances 0.000 claims abstract description 13
- 241000239250 Copepoda Species 0.000 claims abstract description 9
- 241000700141 Rotifera Species 0.000 claims abstract description 9
- 230000001418 larval effect Effects 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 25
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 14
- 238000005286 illumination Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 230000012447 hatching Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 235000013601 eggs Nutrition 0.000 claims description 5
- 230000000384 rearing effect Effects 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 4
- 229920006255 plastic film Polymers 0.000 claims description 4
- 241001247197 Cephalocarida Species 0.000 claims description 3
- 230000000366 juvenile effect Effects 0.000 claims description 3
- 230000004083 survival effect Effects 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 description 7
- 238000011534 incubation Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000008236 heating water Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000347391 Umbrina cirrosa Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012136 culture method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
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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
-
- 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
-
- 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
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention provides a seawater fish seedling raising device and a seawater fish seedling raising method, wherein the length-width ratio of a seedling raising pool is 3-6 ׃ 1, the water inlet end and the water outlet end of the seedling raising pool [3] are connected with a pond [1], and the volume of the pond is more than 14 times of that of the seedling raising pool. The water inlet end is provided with a water-gas mixing device [2], and the bottom surface of the water outlet end is provided with a sewage collecting groove [5 ]. The feeding density of the larval fish in the breeding pond is more than 6 ten thousand fish/cubic meter; cultivating rotifers and copepods by applying inorganic fertilizer containing N, P to the pond and sending the rotifers and copepods into a seedling raising pond along with water; dirt is sucked from the dirt collecting groove at regular time. Compared with the prior art, the invention has the advantages of concentrated fry, convenient observation and capture, concentrated feeding and less residual quantity. The dirt collecting groove deposits dirt and is convenient to discharge. The water in the seedling raising pond is exchanged with the water in the pond without changing water. The water in the seedling raising pond is mixed with water and air (aerated), and dirt is removed at any time, so that the better quality can be kept, and the separate culture is not needed. The survival rate of the seedlings is 30-40% by experimental determination.
Description
Technical Field
The invention relates to a seawater fish seedling raising device and a seawater fish seedling raising method.
Background
The fry breeding is a process from the hatching of fish eggs to the formation of fries, namely a process of hatching fertilized eggs to obtain fry, and breeding the fry to enable the fry to pass through young fishes to grow into young fishes. At present, seedling raising is carried out in an indoor seedling raising pond, a large amount of baits, mainly including baits of rotifers, artemia nauplii, copepods and the like, need to be fed in the seedling raising period, and mixed feed needs to be fed in the later period. Meanwhile, sewage and water are periodically discharged and changed to keep the water quality good, so that the fry can grow in a proper environment. The density of the fry in the fry breeding pond is about 2-3 ten thousand tails per cubic meter, and the survival rate is 10-20%; in addition, the maximum seedling density is 5 ten thousand pieces/cubic meter.
The method for raising the fry has the advantages that the fry raising density is low, so that the observation of the fry growth condition is difficult, the fed baits are relatively dispersed, the residual amount is large, and the harvesting efficiency of the fry is low. If the density of the fry in the fry raising pond is simply increased, the survival rate is reduced because the water quality is difficult to ensure. In addition, in the indoor breeding, as the fry grows up, the water quality is easily deteriorated due to factors such as increased oxygen consumption, increased residual bait amount, increased excrement and the like, so that the water body load is reduced by carrying out the multi-time separated breeding.
In a word, the existing seedling culture method has the defects of large water consumption, large bait consumption, high labor cost and the like.
Disclosure of Invention
Aiming at the defects, the technical problem to be solved by the invention is to improve the fry density and keep enough survival rate so as to provide an effective high-density marine fish fry breeding device and a fry breeding method.
The invention provides a marine fish seedling raising device which is a rectangular civil-engineering seedling raising pool, wherein the length-width ratio of the seedling raising pool is 3-6 ׃ 1, water flow enters from one short edge end and flows out from the other short edge end, a water inlet end is provided with a water-gas mixing device, the pool edge of an outflow end is an overflow edge, an anti-escape net is arranged on the overflow edge, a sewage collecting groove is arranged on the bottom surface of the outflow end along the short edge, a sewage discharge outlet of the sewage collecting groove is connected with a sewage discharge pump, and a safety net is arranged outside the sewage discharge outlet; the water inlet end and the water outlet end of the seedling raising pool are connected with a pond, and the volume of the pond is more than 14 times of that of the seedling raising pool.
The invention provides a fry breeding method of a seawater fish fry breeding device, which comprises the steps of putting fry obtained after spawns are hatched into a fry breeding pond, and feeding rotifers, artemia nauplii, copepods or supplementary compound feed according to the growth degree; the feeding density of the larval fish in the breeding pond is more than 6 ten thousand fish/cubic meter; the rotifer and copepods are cultivated by applying inorganic fertilizer containing N, P to the pond and are sent into the seedling raising pond along with water through a water-gas mixing device; dirt is sucked from the dirt collecting groove at regular time.
According to the device and the method for breeding the seawater fish, provided by the invention, high-density fish fries are put into the breeding pond, water in the pond is involved in water circulation in the breeding pond, and meanwhile baits such as rotifers, copepods and the like are propagated in the pond and flow into the breeding pond along with the water. Compared with the prior art, the fry is concentrated, so that the fry is convenient to observe and capture, and the labor input is saved. For the feed needing to be fed manually, the feeding range is small and relatively centralized, and the feeding efficiency of the fry on the feed is good and the residual quantity is small; the feed residue and excrement are deposited in the sewage collecting tank along with water flow, and the discharge is convenient. The water in the nursery pond flows and is continuously exchanged with the large water body in the pond, and the water does not need to be frequently changed to reduce the water consumption. The oxygen content of the water in the nursery pond is improved through water-gas mixing (aeration), and dirt is removed at any time, so that although the density of the fish fries in the nursery pond is high, the water in the nursery pond can always keep good quality, and the step of pond-by-pond culture is omitted. The survival rate of the seedling is 30-40% by actual test.
According to the seawater fish seedling raising device provided by the invention, the seedling raising pool is built in the pond, namely at least two short sides and one long side are built in the water body of the pond, so that the length of a water inlet and outlet flow passage is shortened.
An incubation pool is built beside the seedling culture pool at a long edge, so that larva fishes can be conveniently transferred, the transfer time of the larva fishes is shortened, and the quality of the larva fishes is improved.
The seedling raising pond is built with a shed frame, and shading materials are installed on the shed frame to prevent strong light from damaging the fish fries.
The shading material is of a rolling type, the lighting lamp is further installed in the shed frame, the illumination sensor is installed above the seedling raising pool, the shading material rolling machine and the control switch and the illumination sensor of the lighting lamp are connected with the control unit, and the control unit stores standard illumination values. The device is used for controlling the light on the seedling raising pond to be not too strong or too weak.
The shading material is a semitransparent plastic film, a rainfall sensor is installed outside the shed frame and is also connected with the control unit, a rainfall standard value is stored in the control unit, and the control unit is connected with a control switch of the shading material rolling and releasing machine according to an instruction signal generated by the rainfall sensor. When the rainfall is larger than the standard value, the translucent plastic film is covered on the seedling raising pond.
Nursery pond pool wall is put on the shelf and is equipped with the gas distribution pipe, and the gas distribution pipe is connected with the air pump, still installs dissolved oxygen sensor in the nursery pond, and the control switch and the dissolved oxygen sensor of air pump all are connected with the control unit, and the storage has the dissolved oxygen standard value in the control unit.
Install bait density detection device in the pond, install electronic fertilizer injection unit on the pond, electronic fertilizer injection unit and bait density detection device are connected with the control unit, and the storage has the bait density standard value in the control unit. The bait density detection device is usually a camera device which limits the background and range, the bait density is estimated by comparing a computer with a standard image, and the electric fertilizing device is usually a fertilizer bin and an applying mechanism, such as a jet pump, a throwing machine and the like.
Install ammonia nitrogen content sensor in the pond, ammonia nitrogen content sensor is connected with the control unit, and the storage has ammonia nitrogen content standard value in the control unit, and the control unit is connected with electronic fertilizer injection unit according to the instruction signal that ammonia nitrogen content sensor produced.
The water inlet of the water-gas mixing device is respectively connected with the pond and the seedling raising pond through a two-position three-way switching valve, one position of the switching valve is communicated with the pond and the water inlet, and the other position of the switching valve is communicated with the seedling raising pond and the water inlet and is used for switching the external circulation and the internal circulation of water in the seedling raising pond.
The water outlets of the water-gas mixing devices are arranged in parallel and are uniformly distributed on the whole length of the water inlet end of the seedling raising pool, and the water outlets are jet ports pointing to the water outlet end.
The invention provides a seedling raising method of a seawater fish seedling raising device,
1) in the fry stage, the water-gas mixing device works in an intermittent opening mode, and meshes of the anti-escape net and the safety net are smaller than the minimum size of the fry in the fry rearing pond;
2) in the fry stage, when the amount of bait supplied to the pond is observed to be insufficient, the bait is supplemented in a manual feeding mode, and meanwhile, the inlet of the water-gas mixing device is switched into the water internal circulation of the seedling raising pond;
3) in the juvenile fish stage, the water-gas mixing device works in a full-day opening mode, and meshes of the anti-escape net and the safety net are smaller than the minimum size of elegant fishes in the fry rearing pond;
4) the inlet of the water-gas mixing device is switched into the water circulation of the seedling raising pool during rainstorm;
5) the water flow speed in the fry raising pond is less than the maximum speed for keeping the fry to move independently.
Drawings
Fig. 1 is a plan view of a seedling raising device in the present invention, and fig. 2 is an elevation view of the seedling raising device in the present invention, in which: 1-pond, 2-gas-water mixing device, 3-seedling raising pond, 4-hatching pond and 5-sewage collecting tank.
Detailed Description
As shown in fig. 1 and 2, in a civil pond 1, two side-by-side ponds are constructed by civil engineering, both ponds being rectangular and connected by long sides, the long side of one of the ponds abutting against the pond shore. Of the two ponds, the side close to the pond is a hatching pond 4, and the other is a seedling raising pond 3. The area ratio of the nursery pond to the pond is 1 ׃ 20, and the length-width ratio of the nursery pond is 5 ׃ 1. A water-gas mixing device 2 is arranged on one short edge of the seedling raising pool, a two-position three-way switching valve is arranged on a water inlet of the mixing device, one of the other two ports of the switching valve is connected with an external circulation water suction port 30 cm below the water surface of the pond, and the other one of the other two ports of the switching valve is connected with an internal circulation water suction port 20 cm below the water surface of the seedling raising pool. The switching valve is used for connecting the water inlet of the mixing device with the inner circulation water suction port or the outer circulation water suction port. The water outlets of the mixing device are arranged at 40 cm positions on the bottom of the pond along the whole length of the pond, the water outlets are jet ports with water flow directions pointing to the short edges of the other end of the seedling pond, and the water outlets drive the whole water in the seedling pond to flow from one end to the other end through jet water flow. Another minor face of pond of growing seedlings is the overflow limit, and the overflow edge is provided with prevents the ease net to prevent that the fry from overflowing along with rivers and growing seedlings the pond, and the inboard bottom of the pool in overflow limit sets up a recess along this minor face and is the dirty groove 5 of collection, and the tank bottom has the soil pick-up mouth to be connected with the soil pick-up pump, and the soil pick-up mouth is installed the safety net outward in order to prevent that the fry from being inhaled. The safety net is a blocking net arranged at the periphery of the suction port and at a position where the suction force is not enough to prevent the fry from freely swimming, so as to prevent the fry from being sucked into the sewage suction pump. Four sides of the seedling raising pool are upwards provided with a shed frame, a rolling type covering film is arranged on the shed roof, and the covering film is a black and gray plastic film and is semitransparent and waterproof. The rolling-releasing type tarpaulin film consists of a rolling-releasing shaft with film, a motor for driving the rolling-releasing shaft and a speed change mechanism. An illumination sensor and a temperature sensor are arranged below the shed roof, and an illuminating lamp is also arranged below the shed roof. And a rainfall sensor is arranged outside the shed frame. The wall of the seedling raising pond is uniformly provided with an air distribution pipe, the air distribution pipe is a pipe provided with an air outlet hole, and the air distribution pipe is connected with an air pump. A floating platform is built in the pond, a fertilizer bin is mounted on the floating platform, liquid fertilizer is filled in the fertilizer bin, the fertilizer is inorganic fertilizer containing N, P, and the lower opening of the fertilizer bin is connected with an inlet of a jet pump. The camera devices are arranged in different depths and different areas under the water surface in the pond, round white backgrounds with the same size are arranged in front of the cameras of the camera devices at the same distance, and synchronous illumination is realized during camera shooting. An ammonia nitrogen content sensor is also arranged in the pond. The control unit is provided with a signal input port which is connected with each camera device, the illumination sensor, the rainfall sensor, the ammonia nitrogen content sensor and the oxygen content sensor through the wireless transceiver, and a signal output port which is connected with a power switch of the winding and unwinding motor, the illuminating lamp, the jet pump and the air pump. The control unit is provided with a computer, wherein the standard value of the bait density, the identification program of the bait, the standard value of the illumination, the standard value of the rainfall, the standard value of the ammonia nitrogen content and the standard value of the oxygen content are stored. The control unit is also connected with the sewage suction pump and the water-gas mixing device. The wall of the hatching pond is provided with an electric heating water heating device, the seedling pond is internally provided with a temperature sensor, the end of the shed frame is provided with a ventilation electric fan, the electric heating water heating device and the ventilation electric fan are all connected with a control unit, and the control unit stores a control standard value of the temperature of the water in the hatching pond. An axial flow type stirrer is arranged in the hatching pond.
During operation, taking spotted maigre seedling culture as an example, a pond, a seedling culture pond and an incubation pond are prepared according to the required salinity and depth, fertilized eggs are placed into the incubation pond for incubation, a control unit is started, and the water temperature is adjusted by an electric water heating device or a ventilation fan according to the temperature fed back by a temperature sensor in the incubation pond. Meanwhile, biological baits such as rotifers, copepods and the like are cultivated in the pond, the water-gas mixing device is started, and the external circulation is switched to enable water in the pond and the seedling raising pond to be circulated and stirred. After the fish eggs begin to hatch the fry, biological bait is artificially fed into the hatching pond, when the fry grows to be more than 8 mm, the fry are periodically transferred to a seedling pond in batches, and the amount of the fry transferred into the seedling pond is 8 thousands of fish per cubic meter. The sewage suction pump, the winding and unwinding motor, the illuminating lamp, the jet pump, the air pump and the like are controlled by the control unit from the beginning of the young seedling placement. The control unit controls the film to be wound or illuminated according to the illumination of the seedling raising pool obtained by the illumination sensor; controlling the film to be rolled and unwound and switching internal and external circulation according to the rainfall sensor; controlling the injection pump to fertilize according to the calculation result of the image obtained by the camera device in the computer and the feedback data of the ammonia nitrogen content sensor; and controlling an air pump to perform supplementary aeration on the seedling raising pond according to feedback data of the oxygen content sensor, and ensuring that the seedling raising pond obtains standard irradiation, oxygen content and bait amount. Periodically extracting sewage from the seedling raising pond and discharging the sewage, and simultaneously pouring supplementary seawater into the pond. During the period, the situation in the fry rearing pond is manually observed, and in the fry stage when the body length of the fry is below 15 mm, the water-gas mixing device works in an intermittent opening mode of opening for 4 hours and stopping for 2 hours, and the meshes of the anti-escape net and the safety net are 60 meshes; if the amount of the bait supplied by the pond is insufficient, the bait is supplemented in time in a manual feeding mode, and meanwhile, the inlet of the water-gas mixing device is switched into the water internal circulation of the seedling raising pond; in the juvenile fish stage when all fish fry bodies are more than 15 mm long, the water-gas mixing device works in a full-day opening mode, and the meshes of the anti-escape net and the safety net are changed into 40 meshes; in addition, the inlet of the water-gas mixing device is switched into the water internal circulation of the seedling raising pool during rainstorm, and the water flow speed in the seedling raising pool is lower than the maximum speed for keeping the fish fry to move autonomously. When the length of all the fry is more than 25 mm, the fry is emerged when entering the larval stage. And (3) handling the accidental events in time, and finally obtaining the fry amount which is about 36.89% of the amount of the fish fries put in.
Claims (9)
1. A marine fish seedling raising device is a rectangular civil-engineering seedling raising pool and is characterized in that the length-width ratio of the seedling raising pool is 3-6 ׃ 1, water flow enters from one short edge end and flows out from the other short edge end, wherein a water inlet end is provided with a water-gas mixing device, the pool edge of an outflow end is an overflow edge, an anti-escape net is arranged on the overflow edge, a sewage collecting groove is arranged on the bottom surface of the outflow end along the short edge, the sewage collecting groove is provided with a sewage discharge outlet which is connected with a sewage discharge pump, and a safety net is arranged outside the sewage discharge outlet; the water inlet end and the water outlet end of the seedling raising pool are connected with a pond, and the volume of the pond is more than 14 times of that of the seedling raising pool; the water inlet of the water-gas mixing device is respectively connected with the pond and the seedling raising pond through a two-position three-way switching valve, one position of the switching valve is communicated with the pond and the water inlet, and the other position of the switching valve is communicated with the seedling raising pond and the water inlet.
2. The marine fish breeding device as claimed in claim 1, wherein a plurality of water outlets of the water and air mixing device are arranged in parallel and are evenly distributed over the entire length of the water inlet end of the breeding pond, and the water outlets are jet ports directed to the water outlet end.
3. The marine fish seedling raising device as claimed in claim 1, wherein an air distribution pipe is erected on the wall of the seedling raising pond and connected with an air pump, a dissolved oxygen sensor is further installed in the seedling raising pond, a control switch of the air pump and the dissolved oxygen sensor are connected with a control unit, and a standard value of the dissolved oxygen is stored in the control unit.
4. A marine fish seedling raising apparatus as claimed in claim 1, 2 or 3, wherein the pond is built with a canopy frame, the canopy frame is provided with a light shielding material, the light shielding material is reeled and unreeled, the canopy frame is further provided with a lighting lamp, an illumination sensor is installed above the pond, the light shielding material reeling and unreeling machine and a control switch of the lighting lamp and the illumination sensor are connected with a control unit, and a standard illumination value is stored in the control unit.
5. A marine fish seedling raising apparatus as claimed in claim 4, wherein the light-shielding material is a translucent plastic film, a rainfall sensor is mounted outside the shed frame, the rainfall sensor is connected to a control unit, a standard rainfall value is stored in the control unit, and the control unit is connected to a control switch of the light-shielding material reel-up machine according to a command signal generated by the rainfall sensor.
6. A marine fish seedling raising device as claimed in claim 1, 2 or 3, wherein a bait density detection device and/or an ammonia nitrogen content sensor is/are installed in the pond, an electric fertilizing device is installed on the pond, the electric fertilizing device, the bait density detection device and the ammonia nitrogen content sensor are connected with a control unit, and a bait density standard value and an ammonia nitrogen content standard value are stored in the control unit.
7. A marine fish seedling raising device as claimed in claim 4, wherein a bait density detection device and/or an ammonia nitrogen content sensor is/are installed in the pond, an electric fertilizing device is installed on the pond, the electric fertilizing device, the bait density detection device and the ammonia nitrogen content sensor are connected with the control unit, and a bait density standard value and an ammonia nitrogen content standard value are stored in the control unit.
8. A method of raising fish fry in seawater according to claim 1, wherein the fry obtained after hatching the fish eggs is first put into a raising pond and then fed with rotifers, artemia nauplii, copepods or supplementary feeds according to the degree of growth; the method is characterized in that the throwing density of the larval fish in the nursery pond is more than 6 ten thousand fish/cubic meter; the rotifer and copepods are cultivated by applying inorganic fertilizer containing N, P to the pond and are sent into the seedling raising pond along with water through a water-gas mixing device; dirt is sucked from the dirt collecting groove at regular time.
9. A method of raising seedlings of a marine fish raising apparatus according to claim 8, characterized in that:
1) in the fry stage, the water-gas mixing device works in an intermittent opening mode, and meshes of the anti-escape net and the safety net are smaller than the minimum size of the fry in the fry rearing pond;
2) in the fry stage, when the amount of bait supplied to the pond is observed to be insufficient, the bait is supplemented in a manual feeding mode, and meanwhile, the inlet of the water-gas mixing device is switched into the water internal circulation of the seedling raising pond;
3) in the juvenile fish stage, the water-gas mixing device works in a full-day opening mode, and meshes of the anti-escape net and the safety net are smaller than the minimum size of elegant fishes in the fry rearing pond;
4) the inlet of the water-gas mixing device is switched into the water circulation of the seedling raising pool during rainstorm;
5) the water flow speed in the fry raising pond is less than the maximum speed for keeping the fry to move independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610414942.3A CN105994100B (en) | 2016-06-15 | 2016-06-15 | Seawater fish seedling raising device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610414942.3A CN105994100B (en) | 2016-06-15 | 2016-06-15 | Seawater fish seedling raising device and method |
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| CN105994100A CN105994100A (en) | 2016-10-12 |
| CN105994100B true CN105994100B (en) | 2022-02-25 |
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| CN201610414942.3A Expired - Fee Related CN105994100B (en) | 2016-06-15 | 2016-06-15 | Seawater fish seedling raising device and method |
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| CN113383733B (en) * | 2021-07-27 | 2022-09-23 | 中国水产科学研究院东海水产研究所 | Artificial cultivation method for young spiny plum juvenile fish |
| CN114667958B (en) * | 2022-03-17 | 2022-12-09 | 营口市农业农村综合发展服务中心 | Artificial breeding facility and breeding method for Chinese tiger head crabs |
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| US9468197B2 (en) * | 2011-04-01 | 2016-10-18 | Miguel Nenadovich Del Rio | Cooling process for cultivated salmon to rapidly induce unconsciousness during harvest |
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| CN101653105A (en) * | 2009-09-08 | 2010-02-24 | 中国水产科学研究院渔业机械仪器研究所 | Water-saving marine fish culture water purification plant and method |
| CN204014778U (en) * | 2014-09-09 | 2014-12-17 | 蒋国良 | Cultivate the circulation miniflow water height dissolved oxygen nursery pond of wheat dace seedling |
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