CN111034654A - Method for silvering Pacific silver salmon fry - Google Patents
Method for silvering Pacific silver salmon fry Download PDFInfo
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- CN111034654A CN111034654A CN201811181475.XA CN201811181475A CN111034654A CN 111034654 A CN111034654 A CN 111034654A CN 201811181475 A CN201811181475 A CN 201811181475A CN 111034654 A CN111034654 A CN 111034654A
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- 241000972773 Aulopiformes Species 0.000 title claims abstract description 44
- 235000019515 salmon Nutrition 0.000 title claims abstract description 44
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 41
- 239000004332 silver Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000005286 illumination Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 10
- 241000277334 Oncorhynchus Species 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 239000008280 blood Substances 0.000 claims description 29
- 210000004369 blood Anatomy 0.000 claims description 29
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- 241000251468 Actinopterygii Species 0.000 claims description 13
- 235000019688 fish Nutrition 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 10
- 229910052708 sodium Inorganic materials 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 239000011780 sodium chloride Substances 0.000 claims description 9
- 230000004083 survival effect Effects 0.000 claims description 9
- 239000002349 well water Substances 0.000 claims description 8
- 235000020681 well water Nutrition 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 239000012267 brine Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
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- 230000037406 food intake Effects 0.000 claims description 4
- 239000003673 groundwater Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 4
- 239000011859 microparticle Substances 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 4
- 108090000623 proteins and genes Proteins 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 230000003938 response to stress Effects 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000009534 blood test Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009360 aquaculture Methods 0.000 abstract description 2
- 244000144974 aquaculture Species 0.000 abstract description 2
- 230000003134 recirculating effect Effects 0.000 abstract description 2
- 239000013505 freshwater Substances 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 241000975357 Salangichthys microdon Species 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 208000024827 Alzheimer disease Diseases 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 108010023302 HDL Cholesterol Proteins 0.000 description 1
- 241001124553 Lepismatidae Species 0.000 description 1
- 206010039966 Senile dementia Diseases 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Polymers & Plastics (AREA)
- Biodiversity & Conservation Biology (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Insects & Arthropods (AREA)
- Fodder In General (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention provides a method for silvering a Pacific silver salmon fry. The technical scheme is as follows: the silver process comprises three steps of synchronous management: a first step of silvering mode, a second step of cultivation management and a third step of illumination control; judging the success of the silver-making: judging whether the silvered salmon is silvered successfully or not in a mode of appearance judgment and physiological detection; designing a culture pond of a culture workshop: mainly comprises tank body design, water treatment and oxygen supply. The invention has the beneficial effects that: a method for silvering Pacific salmon fry comprises a treatment mode of water for silvering process, and time and intensity of light control; the feed formula selection and feeding, and the physiological detection and control design in the culture period are suitable for industrial recirculating aquaculture of Pacific silver salmon, provide a feasible technical scheme for the silvering of the fry of Pacific silver salmon, and have good economic benefits.
Description
Technical Field
The invention relates to the technical field of whitebait fry, in particular to a silvering method of Pacific whitebait fry.
Background
The primary habitat of Pacific silver salmon is mainly in the east of the Pacific ocean, i.e., the West coast of the United states and Canada. Spawning in fresh water under natural condition, developing until grown fish seed swims into sea, and after grown fish in sea, swiming back to fresh water to spawn to complete its growth period. The silver salmon is cold water fishes, the ideal water temperature is 10-18 ℃, the adaptability to salinity is strong, and the silver salmon can grow normally by directly transferring fresh water to water with 10 per thousand of salinity without acclimation. Silver salmon is a natural meat animal, generally mainly comprises trash fish, and also eats plankton and benthonic animals in the seedling stage. In the case of artificial breeding, the feed is also favored by the granulated feed. According to the introduction of the culture center of the Seattle cold water fish in Washington, USA, the silver salmon needs 8 months for growing to 350g, and then the weight of the silver salmon can reach 3kg after the silver salmon is continuously cultured for 8-10 months. Generally, 4-6 kg can be obtained after 18-24 months of cultivation.
The silverfish flesh is fresh orange red, rich in nutrition, delicious in meat quality, rich in DHA, EPA and various vitamins, capable of increasing high-density lipoprotein cholesterol, enhancing blood vessel elasticity, effectively reducing blood fat and blood cholesterol, good in effect of preventing and treating cardiovascular diseases and senile dementia and very beneficial to human health after being eaten for a long time. Along with the improvement of the living standard of people in China, people pay more and more attention to the health of people, and silver salmon which is a healthy food is more and more popular and named salmon. The market is very wide, but most of the sold products are frozen products imported from abroad, the freshness and the nutrition are not guaranteed, and the silver salmon farming industry is very necessary to develop in China.
Disclosure of Invention
The invention aims to provide a method for silvering Pacific silver salmon fry, which is suitable for silvering the silver salmon fry, and the technical scheme comprises the following steps: the silver process comprises three steps of synchronous management: the first step silvering mode: carrying out silvering on the silver salmon fry by controlling the photoperiod, designing to turn on the lamp in the morning at 7:39 and turn off the lamp in the evening at 19:17 by referring to the time of the silver salmon roe source on a Vancouver island in Canada, maintaining for 6 weeks, carrying out full-light cultivation after silvering is finished, continuing for 5 weeks, and prolonging the lamp turning-on and turning-off time if the silvering is unsuccessful; the second step is cultivation management: feeding by using an air-blowing automatic bait casting machine 24 times a day and once per hour, wherein the daily feeding rate is 2.5 percent; the feed is a compound pellet feed special for silver salmon, the protein content is 56 percent, and the fat content is 18 percent; when the fry grows to the average weight of 20g, the illumination control is started, the daily feeding rate is reduced to 80 percent of the original daily feeding rate, the feeding is flexibly adjusted according to the actual ingestion condition, the feeding is finished in a lighting period, and the feeding is performed 12 times a day and once an hour; the third step is illumination control: the LED intelligent light-operated lamp is used for lighting, the power is 60w, the light intensity is 90lm/w, the light color is enhanced by red light, the fry development is facilitated, and the light is turned on and off at intervals of 12 hours in the light-operated period; the tank body is covered by shading cloth to ensure no light transmission; when the light is turned on and off, the light is turned on slowly, the time for turning on the light illumination intensity from 0% to 100% is set to be 20 seconds, otherwise, the light is turned off slowly to reduce the stress response of the fry.
Judging the success of the silver-making: whether the silvered salmon is silvered or not is judged in a mode of appearance judgment and physiological detection, and the appearance judgment standard is as follows: the surfaces of the fries successfully silvered are changed from yellowish to silvery, scales are relatively loose, and transverse stripes on the side of the fries disappear; the main process of the physiological detection operation comprises two steps: the method comprises the following steps of (1) detecting the concentration of sodium in blood chlorated blood in a first step and detecting the tolerance of high salinity in a second step, wherein the concentration of sodium in blood chlorated blood in the first step is detected: placing the fry in a water body with 35 per thousand of salinity for 24 hours, collecting the blood sodium chloride blood concentration of the fish body blood test, wherein the blood sodium level is between 160-; and a second step of high salinity tolerance detection: the survival rate of the fries is measured for 96 hours in 40 per thousand saline, and the survival rate of the norhaben in a good state can reach 100 percent.
Designing a culture pond of a culture workshop: mainly including jar body design, water treatment and oxygen supply, jar body design: the specification of the tank body is a glass fiber reinforced plastic circular tank body with the diameter of 6 meters and the depth of 1.3 meters, and the total volume of the tank body is 30 cubic water bodies; water treatment: first step groundwater treatment: carrying out silt filtration, heavy metal removal, brine bromide adsorption and salinity regulation on underground well water to enable the well water to meet the requirements; the second step of circulating water purification mode: pumping water by a water pump from a pump pit, feeding the water into an oxygen dissolving cone, adding pure oxygen, feeding the water into a culture tank, filtering, separating protein, feeding the water with the water inflow of 25 cubic meters per hour, discharging the water into a micro-filter, filtering residual bait excrement, further removing micro-particles by a floating bead filter, feeding the water into the pump pit, pumping the water by the water pump, and completing circulation; oxygen supply: oxygen is supplied mainly through the dissolved oxygen cone, and a ceramic aeration disc is used as standby emergency oxygen supply to start oxygen increasing when power is off or a system fails.
The invention has the beneficial effects that: a method for silvering Pacific salmon fry comprises a treatment mode of water for silvering process, and time and intensity of light control; the feed formula selection and feeding, and the physiological detection and control design in the culture period are suitable for industrial recirculating aquaculture of Pacific silver salmon, provide a feasible technical scheme for the silvering of the fry of Pacific silver salmon, and have good economic benefits.
Detailed Description
A method for silvering a Pacific silver salmon fry,
the silver process comprises three steps of synchronous management: the first step silvering mode: carrying out silvering on the silver salmon fry by controlling the photoperiod, designing to turn on the lamp in the morning at 7:39 and turn off the lamp in the evening at 19:17 by referring to the time of the silver salmon roe source on a Vancouver island in Canada, maintaining for 6 weeks, carrying out full-light cultivation after silvering is finished, continuing for 5 weeks, and prolonging the lamp turning-on and turning-off time if the silvering is unsuccessful; the second step is cultivation management: feeding by using an air-blowing automatic bait casting machine 24 times a day and once per hour, wherein the daily feeding rate is 2.5 percent; the feed is a compound pellet feed special for silver salmon, the protein content is 56 percent, and the fat content is 18 percent; when the fry grows to the average weight of 20g, the illumination control is started, the daily feeding rate is reduced to 80 percent of the original daily feeding rate, the feeding is flexibly adjusted according to the actual ingestion condition, the feeding is finished in a lighting period, and the feeding is performed 12 times a day and once an hour; the third step is illumination control: the LED intelligent light-operated lamp is used for lighting, the power is 60w, the light intensity is 90lm/w, the light color is enhanced by red light, the fry development is facilitated, and the light is turned on and off at intervals of 12 hours in the light-operated period; the tank body is covered by shading cloth to ensure no light transmission; when the light is turned on and off, the light is turned on slowly, the time for turning on the light illumination intensity from 0% to 100% is set to be 20 seconds, otherwise, the light is turned off slowly to reduce the stress response of the fry.
Judging the success of the silver-making: whether the silvered salmon is silvered or not is judged in a mode of appearance judgment and physiological detection, and the appearance judgment standard is as follows: the surfaces of the fries successfully silvered are changed from yellowish to silvery, scales are relatively loose, and transverse stripes on the side of the fries disappear; the main process of the physiological detection operation comprises two steps: the method comprises the following steps of (1) detecting the concentration of sodium in blood chlorated blood in a first step and detecting the tolerance of high salinity in a second step, wherein the concentration of sodium in blood chlorated blood in the first step is detected: placing the fry in a water body with 35 per thousand of salinity for 24 hours, collecting the blood sodium chloride blood concentration of the fish body blood test, wherein the blood sodium level is between 160-; and a second step of high salinity tolerance detection: the survival rate of the fries is measured for 96 hours in 40 per thousand saline, and the survival rate of the norhaben in a good state can reach 100 percent.
Designing a culture pond of a culture workshop: mainly including jar body design, water treatment and oxygen supply, jar body design: the specification of the tank body is a glass fiber reinforced plastic circular tank body with the diameter of 6 meters and the depth of 1.3 meters, and the total volume of the tank body is 30 cubic water bodies; water treatment: first step groundwater treatment: carrying out silt filtration, heavy metal removal, brine bromide adsorption and salinity regulation on underground well water to enable the well water to meet the requirements; the second step of circulating water purification mode: pumping water by a water pump from a pump pit, feeding the water into an oxygen dissolving cone, adding pure oxygen, feeding the water into a culture tank, filtering, separating protein, feeding the water with the water inflow of 25 cubic meters per hour, discharging the water into a micro-filter, filtering residual bait excrement, further removing micro-particles by a floating bead filter, feeding the water into the pump pit, pumping the water by the water pump, and completing circulation; oxygen supply: oxygen is supplied mainly through the dissolved oxygen cone, and a ceramic aeration disc is used as standby emergency oxygen supply to start oxygen increasing when power is off or a system fails.
Example 1:
in 2018, 3-5 months, the research on the argentization of Pacific silver salmon fry is carried out in Eggan ocean water obstetrics and gynecology limited company, the Pacific silver salmon fry is used for building a culture workshop 6800 square meters, a deep processing workshop 1500 square meters, a comprehensive test and a science popularization exhibition teaching facility 1500 square meters. The system has an industrial circulating water culture demonstration base integrating seedling breeding, finished product culture, equipment research and development, product processing and brand marketing.
The method comprises the following specific steps:
preparation work
Design of culture pond
1. A tank body: the fry is averagely put in 2 tank bodies for cultivation, the specification of the tank bodies is a glass fiber reinforced plastic circular tank body with the diameter of 6 meters and the depth of 1.3 meters, and the total volume of the tank bodies is 30 cubic water bodies.
2. Water treatment: first step groundwater treatment: carrying out silt filtration, heavy metal removal, brine bromide adsorption and salinity regulation on underground well water to enable the well water to meet the requirements; the second step of circulating water purification mode: pumping water by a water pump from a pump pit, feeding the water into an oxygen dissolving cone, adding pure oxygen, feeding the water into a culture tank, and filtering and separating protein, wherein the water inflow is 25 cubic meters per hour; the drained water flows into a micro-filter, after residual bait and excrement are filtered, micro particles are further removed through a floating bead filter, the drained water flows into a pump pit, and water is pumped through a water pump to complete circulation.
3. Oxygen supply: oxygen is supplied mainly through the dissolved oxygen cone, and a ceramic aeration disc is used as standby emergency oxygen supply to start oxygen increasing when power is off or a system fails.
(II) fry biomass: the total number of fish fries in the workshop is 20667, the weight of the fish fries is 12g after 3 months and 6 days, the state is good, and the fish fries do not die.
Silver process
(1) Silver method: the silver of the silver salmon fry is carried out by controlling the photoperiod. Referring to the time of the source place of the silver salmon roe, namely the time of the Vancouver island in Canada, the lamp is turned on at 7:39 in the morning and turned off at 19:17 in the evening, the lamp is maintained for 6 weeks, and the full-light cultivation is carried out after the silvering is finished for 5 weeks.
(2) Cultivation management: feeding by using an air-blowing automatic bait casting machine 24 times a day and once per hour, wherein the daily feeding rate is 2.5 percent. The feed is a special compound pellet feed for salmon, and has a protein content of 56% and a fat content of 18%. The illumination control is carried out when the fry grows to 20g of average weight, the daily feeding rate is reduced to 80 percent of the original daily feeding rate, the feeding is flexibly adjusted according to the actual ingestion condition, the feeding is finished in a lighting period, and the feeding is carried out 12 times a day and once an hour.
(3) And (3) illumination control: the LED intelligent light-controlled lamp is used for lighting, the power is 60w, the light intensity is 90lm/w, and the light color is enhanced by red light, so that the fry growth is facilitated. The light control period is 12 hours for turning on the lamp and 12 hours for turning off the lamp. And the tank body is covered by shading cloth, so that no light transmission is ensured. When the light is turned on and off, the time for changing the illumination intensity from 0% to 100% is set as 20 seconds, and the light is turned on and off slowly to reduce the stress response of the fry.
(4) Judging the success of the silver-making: whether the silvered salmon is successfully silvered is judged by means of appearance judgment and physiological detection. The appearance judgment standard is as follows: the surface of the fry successfully silvered changes from yellowish to silvery, the scales become loose, and transverse stripes on the body side disappear. The physiological detection operation comprises blood sodium chloride blood concentration detection and high salinity tolerance detection, the main process is that the fry is placed in a water body with 35 per thousand salinity for 24 hours, the blood sodium chloride blood concentration of the fish body blood laboratory test is collected, the blood sodium level is between 160 and 170mmol/L, and the chloride is between 140 and 150mmol/L, which indicates that the fish has the capability of performing permeation regulation in seawater, so that the salmon becomes the true sea salmon. The high salinity tolerance detection process is that the survival rate of the salmon in a good state can reach 100 percent by measuring the survival rate of the fry in 40 per mill saline water for 96 hours.
(5) Seedling emergence and pond separation: and (3) selecting and pooling specifications of the salangid-finished Pacific salmon fry, and selecting 20605 survived fries, 20026 silvered qualified fries, with the survival rate of 99.7% and the silvering success rate of 96.9%.
The result shows that after three months of careful cultivation, the success rate of the argentum pelagicum fry silvering is as high as 96.9 percent. Therefore, the method perfectly solves the problem that the Pacific silver salmon silvering process can only be finished in nature, completely adapts to the industrial culture conditions, and is suitable for popularization in coastal areas in China.
Claims (3)
1. A silvering method of Pacific silver salmon fry is characterized in that: the silver process comprises three steps of synchronous management: the first step silvering mode: carrying out silvering on the silver salmon fry by controlling the photoperiod, designing to turn on the lamp in the morning at 7:39 and turn off the lamp in the evening at 19:17 by referring to the time of the silver salmon roe source on a Vancouver island in Canada, maintaining for 6 weeks, carrying out full-light cultivation after silvering is finished, continuing for 5 weeks, and prolonging the lamp turning-on and turning-off time if the silvering is unsuccessful; the second step is cultivation management: feeding by using an air-blowing automatic bait casting machine 24 times a day and once per hour, wherein the daily feeding rate is 2.5 percent; the feed is a compound pellet feed special for silver salmon, the protein content is 56 percent, and the fat content is 18 percent; when the fry grows to the average weight of 20g, the illumination control is started, the daily feeding rate is reduced to 80 percent of the original daily feeding rate, the feeding is flexibly adjusted according to the actual ingestion condition, the feeding is finished in a lighting period, and the feeding is performed 12 times a day and once an hour; the third step is illumination control: the LED intelligent light-operated lamp is used for lighting, the power is 60w, the light intensity is 90lm/w, the light color is enhanced by red light, the fry development is facilitated, and the light is turned on and off at intervals of 12 hours in the light-operated period; the tank body is covered by shading cloth to ensure no light transmission; when the light is turned on and off, the light is turned on slowly, the time for turning on the light illumination intensity from 0% to 100% is set to be 20 seconds, otherwise, the light is turned off slowly to reduce the stress response of the fry.
2. The method of claim 1, wherein the method comprises the steps of: judging the success of the silver-making: whether the silvered salmon is silvered or not is judged in a mode of appearance judgment and physiological detection, and the appearance judgment standard is as follows: the surfaces of the fries successfully silvered are changed from yellowish to silvery, scales are relatively loose, and transverse stripes on the side of the fries disappear; the main process of the physiological detection operation comprises two steps: the method comprises the following steps of (1) detecting the concentration of sodium in blood chlorated blood in a first step and detecting the tolerance of high salinity in a second step, wherein the concentration of sodium in blood chlorated blood in the first step is detected: placing the fry in a water body with 35 per thousand of salinity for 24 hours, collecting the blood sodium chloride blood concentration of the fish body blood test, wherein the blood sodium level is between 160-; and a second step of high salinity tolerance detection: the survival rate of the fries is measured for 96 hours in 40 per thousand saline, and the survival rate of the norhaben in a good state can reach 100 percent.
3. The method for silvering a young Pacific salmon according to claim 1 or 2, wherein: designing a culture pond of a culture workshop: mainly including jar body design, water treatment and oxygen supply, jar body design: the specification of the tank body is a glass fiber reinforced plastic circular tank body with the diameter of 6 meters and the depth of 1.3 meters, and the total volume of the tank body is 30 cubic water bodies; water treatment: first step groundwater treatment: carrying out silt filtration, heavy metal removal, brine bromide adsorption and salinity regulation on underground well water to enable the well water to meet the requirements; the second step of circulating water purification mode: pumping water by a water pump from a pump pit, feeding the water into an oxygen dissolving cone, adding pure oxygen, feeding the water into a culture tank, filtering, separating protein, feeding the water with the water inflow of 25 cubic meters per hour, discharging the water into a micro-filter, filtering residual bait excrement, further removing micro-particles by a floating bead filter, feeding the water into the pump pit, pumping the water by the water pump, and completing circulation; oxygen supply: oxygen is supplied mainly through the dissolved oxygen cone, and a ceramic aeration disc is used as standby emergency oxygen supply to start oxygen increasing when power is off or a system fails.
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| CN201811181475.XA CN111034654A (en) | 2018-10-11 | 2018-10-11 | Method for silvering Pacific silver salmon fry |
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| CN201811181475.XA CN111034654A (en) | 2018-10-11 | 2018-10-11 | Method for silvering Pacific silver salmon fry |
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| CN113287549A (en) * | 2021-07-06 | 2021-08-24 | 山东康科润海洋科技有限公司 | Sea-lowering domestication cultivation method for freshwater aquaculture silver salmon seeds |
| CN113303256A (en) * | 2021-07-06 | 2021-08-27 | 山东康科润海洋科技有限公司 | Industrial silver salmon fry efficient cultivation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113287549A (en) * | 2021-07-06 | 2021-08-24 | 山东康科润海洋科技有限公司 | Sea-lowering domestication cultivation method for freshwater aquaculture silver salmon seeds |
| CN113303256A (en) * | 2021-07-06 | 2021-08-27 | 山东康科润海洋科技有限公司 | Industrial silver salmon fry efficient cultivation method |
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Application publication date: 20200421 |