CN110800654A - Method for domesticating micropterus salmoides fingerlings in specification - Google Patents
Method for domesticating micropterus salmoides fingerlings in specification Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 241001125889 Micropterus salmoides Species 0.000 title claims abstract description 29
- 241000251468 Actinopterygii Species 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 52
- 241000192710 Microcystis aeruginosa Species 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000007873 sieving Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 241000595940 Notostraca Species 0.000 claims description 36
- 241000238631 Hexapoda Species 0.000 claims description 28
- 238000011534 incubation Methods 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 241001247197 Cephalocarida Species 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 6
- 241000239250 Copepoda Species 0.000 claims description 5
- 241000238557 Decapoda Species 0.000 claims description 5
- 238000010009 beating Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 241001465754 Metazoa Species 0.000 claims description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- 238000004220 aggregation Methods 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000010985 leather Substances 0.000 claims description 3
- 238000006213 oxygenation reaction Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 235000020681 well water Nutrition 0.000 claims description 3
- 239000002349 well water Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 230000004083 survival effect Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000008188 pellet Substances 0.000 abstract description 2
- 239000006187 pill Substances 0.000 description 6
- 238000009395 breeding Methods 0.000 description 4
- 230000001488 breeding effect Effects 0.000 description 4
- 241000700141 Rotifera Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 208000031513 cyst Diseases 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 230000029264 phototaxis Effects 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 241000143060 Americamysis bahia Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000037406 food intake Effects 0.000 description 1
- 244000144980 herd Species 0.000 description 1
- 230000001418 larval effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000020777 polyunsaturated fatty acids Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/17—Hatching, e.g. incubators
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
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- A—HUMAN NECESSITIES
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Fodder In General (AREA)
- Feed For Specific Animals (AREA)
Abstract
The invention discloses a method for domesticating micropterus salmoides specification fingerlings, which comprises the following steps of firstly, selecting indoor fingerling ponds with different shapes and areas according to different stages of fingerlings, setting the stocking density of water bloom to be 5-10 ten thousand pieces/cubic meter, and feeding baits as follows: (1) feeding baits four times a day (2) gradually reducing the feeding range (3) starting feed domestication from the 5 th day, and sieving the baits by sequentially increasing the feeding amount of the baits for 4 days to 10-30 percent (5) of the weight of the water bloom according to the specification of the baits, namely powder, B2 material, B3 material and F3 material. When the climate environment is not suitable, the domestication technology is developed indoors, so that the resistance of the seedlings is increased, the vitality is increased, and the seedling survival rate of the seedlings is improved; the method integrates the culture technology of the micropterus salmoides standard fry by the artificial culture of initial feed, the artificial compound feed domestication and other technical key point control; through popularization and application of replacing iced fresh fish with the pellet feed in the culture process, the ecological culture mode of reducing and improving quality is demonstrated, and the win-win effect of economic benefit and ecological benefit is realized.
Description
Technical Field
The invention belongs to the technical field of fry breeding, and particularly relates to a micropterus salmoides specification fry domestication method.
Background
The larval stage of the Micropterus salmoides of California refers to the stage of culturing from water bloom to a body length of more than 3 cm. The traditional seedling raising method is to take the water bloom in a pond, eat natural baits (rotifers, cladocerans, copepods) and the like, and carry out iced fresh or feed domestication when the water bloom grows to 3 cm. The traditional seedling raising method is greatly influenced by weather, the survival rate of the culture is unstable, and the survival rate of the pond is low when the weather environment is not suitable, so that the research of developing the indoor domestication technology of the micropterus salmoides is of great significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for domesticating micropterus salmoides specification fingerlings.
A method for domesticating micropterus salmoides specific fingerlings comprises the following steps of firstly, selecting indoor fingerling ponds with different shapes and areas according to different stages of fingerlings, setting the stocking density of water bloom to be 5-10 ten thousand pieces per cubic meter, and feeding baits as follows:
(1) feeding mode: feeding the bait four times a day, wherein the feeding time is 30-60min each time;
(2) the feeding range is as follows: distributing the fries in the whole pool on the 1 st to 2 nd day of the water bloom, and sprinkling in the whole pool; on day 3, the feeding range is narrowed, the aggregation degree of the fish is observed, and the fries falling to the edge are supplemented; on the 4 th day, the range is further reduced, and the feeding range is 3-5% of the area of the culture pond;
(3) feeding types: feeding 50-60 g/10 ten thousand of animals by taking the fairy shrimp as an initial live bait from day 1 to day 3; supplementing the frozen insects every time from day 4 to day 13, feeding until the fish eats and is completely dispersed, and feeding uniformly to avoid the phenomenon of large eating and small eating of fish fries; starting feed domestication from the 5 th day, wherein the feed specification is that powder, B2 material, B3 material and F3 material are sequentially increased, the material changing process is continuous and gradual, and the feeding amount is based on that the fry is actively scattered;
(4) feeding amount: the daily feeding amount accounts for 10-30% of the weight of the water bloom;
(5) sieving: according to the specification and size of the fish, the sieve with the proper size is selected, the operation process is fast, the fish does not stop beating in the fish sieve, and the small-specification fish is accelerated to drill out meshes.
In the invention, the characteristic of phototaxis of the micropterus salmoides is utilized, and incandescent light is used for fixed-point attraction when the micropterus salmoides are thrown into the feed, so that the fry is intensively ingested, and the feed domestication is facilitated; the micropterus salmoides need to be screened in time in the domestication process due to the fierce food robbing, which is beneficial to uniform growth and improvement of the domestication survival rate.
In the step (3), the feed domestication method comprises the following steps that on the 5 th day to the 7 th day, the adding amount of powder is gradually increased, the increasing amount of fairy shrimp is gradually reduced, and the feed is basically completely loaded until the 7 th day of the fry; on day 8, the addition of the material B2 was started, and from day 8 to, specifically, day 10, only the fourth year was further added with a small amount of fairy shrimp and the addition amount thereof was reduced; stopping adding the powder material from day 11, and adding the B2 material and the frozen insects from day 11 to day 14, and gradually reducing the adding times of the frozen insects; on day 15, only feed B2 was added; starting to add B3 material from 16 days to 21 days, gradually increasing the addition amount of the B3 material, and gradually reducing the addition amount of B2 material; starting to add only B3 material from the 22 nd to the 24 th days; starting to add F3 material from the 25 th to the 28 th days, gradually increasing the addition amount of the F3 material, and gradually reducing the addition amount of the B3 material; from day 29 to day 30, the transition was to the addition of feed F3 only.
Specifically, the incubation conditions and the collection method of the fairy shrimp in the step (3) are as follows:
(a) incubation conditions of fairy shrimp: adopting clear and impurity-free deep well water or lake water; ensuring sufficient air supply and oxygenation; the incubation salinity is 28-30 per mill; the incubation temperature is 28-30 ℃; the incubation illumination is 2000-3000 lux illumination for 18-24 hours; the incubation time is 18-24 hours;
(b) the method for collecting the fairy shrimp comprises the following steps: closing an oxygen aeration head, sleeving an incubation barrel from an upper opening to a lower opening by using shading cloth, connecting the incubation barrel at a water outlet by using a leather hose after standing for 5 minutes, opening a water discharge switch of the incubation barrel to collect the fairy shrimp, observing that the water discharge color of a water pipe becomes light, closing the water discharge switch, standing for 10-15 minutes again, collecting the fairy shrimp again until the water color becomes light, obviously reducing the shrimp body, completely discharging the rest part, and collecting the fairy shrimp to carry out oxygen aeration for later use.
Specifically, in the feeding mode in the step (1), the feeding time of four times is 6: 00-7: 00 of the first feeding; the second 10: 00-10: 30; the third is 13: 30-14: 00, and the fourth is 17: 30-18: 00.
Specifically, the frozen insects comprise frozen small copepods and cladocera, the melting speed of the frozen insects is adjusted by adjusting the contact area of the frozen insects and water, the situation that the frozen insects melt too fast and fish fries are not ready to eat is avoided, water pollution is caused by water waste due to the fact that the frozen insects fall to the bottom of a pool, the fish which melts too slowly is always not full or full and is eaten all the time, uneven growth is introduced, and after the frozen insects are fed for half an hour each time, fresh live fairy shrimp are supplemented, and the fish is taken as the standard for full.
Specifically, when the feed is acclimated, the requirements of water quality are as follows: ammonia nitrogen is lower than 0.2mg/l, nitrite is lower than 0.2mg/l, and dissolved oxygen is sufficient and is not lower than 5 mg/l; the water is changed once in 4 hours after the cultivation in the circulating water system.
Specifically, the stocking density after domestication of the feed is as follows: the specification of the fish seeds is 0.7-1 cm, and the tail length per m is 30000-500003(ii) a The specification of the fish is 1-1.5 cm, 8000-10000 tails/m3(ii) a The specification of the fingerling is 2-3 cm, 7000-7500 tails/m3(ii) a The specification of the fingerling is 4-5 cm, and the tail length is 6000-6500/m3。
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the method adopted by the invention develops the domestication technology indoors when the climate environment is not suitable, thereby increasing the resistance of the seedlings, increasing the vitality and improving the seedling survival rate of the seedlings; the method integrates the culture technology of the micropterus salmoides standard fry by the artificial culture of initial feed, the artificial compound feed domestication and other technical key point control; through popularization and application of replacing iced fresh fish with the pellet feed in the culture process, the ecological culture mode of reducing and improving quality is demonstrated, and the win-win effect of economic benefit and ecological benefit is realized.
Detailed Description
The following provides a detailed description of preferred embodiments of the invention.
The embodiment of the application provides a method for domesticating the fingerling of the micropterus salmoides in specification (in the embodiment, the adjustment of the following parameters within the range has little influence on the survival of the micropterus salmoides), firstly, according to different stages of the fingerlings, indoor fingerling ponds with different shapes and areas are selected (the following types of indoor fingerling ponds are used in the application, namely a circular pond with the diameter of 2.6m, the height of 0.8m, a circular pond with the length of 4m, the width of 4m, the height of 1m, a circular pond with the length of 5m, the width of 5m, the height of 1m, an octagonal pond with the length of 6m, the width of 6m, the height of 1m, and an octagonal pond with the length of 7.4m, the width of 7.4m, the height of 1. The method selects a circular glass fiber reinforced plastic pool with the diameter of 2.6m and the height of 0.8m, discharges water of 0.6m, discharges 10 thousands of flowers, has the density of about 5 thousands of tails per cubic meter, has the water temperature of 21-22 ℃, and takes 30 days as an example; the bait feeding method comprises the following steps:
a method for domesticating micropterus salmoides specific fingerlings comprises the following steps of firstly, selecting indoor fingerling ponds with different shapes and areas according to different stages of fingerlings, setting the stocking density of water bloom to be 5-10 ten thousand pieces per cubic meter, and feeding baits as follows:
(1) feeding mode: feeding the bait four times a day, wherein the feeding time is 30-60min each time; the feeding time of four times is 6: 00-7: 00 of the first feeding; the second 10: 00-10: 30; the third is 13: 30-14: 00, and the fourth is 17: 30-18: 00.
(2) The feeding range is as follows: distributing the fries in the whole pool on the 1 st to 2 nd day of the water bloom, and sprinkling in the whole pool; on day 3, the feeding range is narrowed, the aggregation degree of the fish is observed, and the fries falling to the edge are supplemented; on the 4 th day, the range is further reduced, and the feeding range is 3-5% of the area of the culture pond;
(3) feeding types: feeding 50-60 g/10 ten thousand of fish tails by taking fairy shrimp (the fairy shrimp which is hatched is fed within 24 hours as much as possible, and the nutrition which exceeds 24 small fairy shrimp loss nutrition and influences the ingestion of fish fries) as open-end live bait from day 1 to day 3; supplementing frozen insects (the frozen insects comprise frozen small copepods and cladocera, the melting speed of the frozen insects is adjusted by adjusting the contact area of the frozen insects and water, so that the iceworms are prevented from melting too fast, fish fries are not ready to eat, water quality is wasted and polluted when the iceworms fall to the bottom of a pool, the fish which are too slow to melt are always not full or are full are always eaten, uneven growth is introduced, the frozen insects are fed for half an hour each time, fresh and alive fairy shrimp are supplemented, the fish is full as the standard), feeding the iceworms until the fish eat is completely scattered, feeding is uniform, and the phenomenon that the fish fries are large and small is avoided; starting feed domestication from the 5 th day, wherein the feed specification is that powder, B2 material, B3 material and F3 material are sequentially increased, the material changing process is continuous and gradual, and the feeding amount is based on that the fry is actively scattered;
(4) feeding amount: the daily feeding amount accounts for 10-30% of the weight of the water bloom;
(5) sieving: according to the specification and size of the fish, the sieve with the proper size is selected, the operation process is fast, the fish does not stop beating in the fish sieve, and the small-specification fish is accelerated to drill out meshes.
In the invention, the characteristic of phototaxis of the micropterus salmoides is utilized, and incandescent light is used for fixed-point attraction when the micropterus salmoides are thrown into the feed, so that the fry is intensively ingested, and the feed domestication is facilitated; the micropterus salmoides need to be screened in time in the domestication process due to the fierce food robbing, which is beneficial to uniform growth and improvement of the domestication survival rate.
The natural initial bait for micropterus salmoides is natural plankton bait mainly comprising rotifer, copepod and cladocera. The artemia cysts are rich in protein, amino acid and fat, contain 60% of protein, 20% of fat and polyunsaturated fatty acid, are high-quality initial feed for shrimp fries, are commonly used in the fry breeding of fishes and shrimps, and can enhance the resistance of the shrimp fries and the fry, increase the vitality and improve the fry breeding survival rate of the fries, so the artemia cysts are commonly applied in the process of breeding aquatic animals. Therefore, the fairy shrimp replaces natural biological bait, and can provide reliable bait for the culture of the micropterus salmoides. Under the condition that the winter or external conditions are not suitable for cultivating the micropterus salmoides fries, the method provides a feasible micropterus salmoides specification fry cultivating method.
The incubation condition and the collection method of the fairy shrimp are as follows:
(a) incubation conditions of fairy shrimp: adopting clear and impurity-free deep well water or lake water; ensuring sufficient air supply and oxygenation; the incubation salinity is 28-30 per mill; the incubation temperature is 28-30 ℃; the incubation illumination is 2000-3000 lux illumination for 18-24 hours; the incubation time is 18-24 hours;
(b) the method for collecting the fairy shrimp comprises the following steps: closing an oxygen aeration head, sleeving an incubation barrel from an upper opening to a lower opening by using shading cloth, connecting the incubation barrel at a water outlet by using a leather hose after standing for 5 minutes, opening a water discharge switch of the incubation barrel to collect the fairy shrimp, observing that the water discharge color of a water pipe becomes light, closing the water discharge switch, standing for 10-15 minutes again, collecting the fairy shrimp again until the water color becomes light, obviously reducing the shrimp body, completely discharging the rest part, and collecting the fairy shrimp to carry out oxygen aeration for later use.
Domesticating the feed: feed acclimation was started on day 5. The frozen insects are put well when feeding is started every time, after fish herds are gathered, the artificial feeding is started, the feed eating condition of the fish is observed, and the live baits are properly adjusted and supplemented for the fairy shrimp. With the increasing of fish eating feed in fish school, the feeding amount of iceworms can be reduced, and the feeding of live baits for the fairy shrimp is stopped. The feed grain size specification is based on that powder (protein content is 52%), B2 material (Dongpo pill, protein content is 52%), B3 material (Dongpo pill, protein content is 50%), F3 material (source pill, protein content is 48%), the grain size of the feed is increased in sequence, the Dongpo pill B2 material is 0.2mm, the Dongpo pill B3 material is 1mm, the source pill F3 material is 2mm, the material changing process is gradual and continuous, a transition period is 5-7 days, the feeding amount is 15-30 wt%, and observation is carried out until fry are actively scattered. The water quality requirements are as follows: ammonia nitrogen is lower than 0.2mg/l, nitrite is lower than 0.2mg/l, and dissolved oxygen is sufficient and is not lower than 5 mg/l; and (5) culturing in a circulating water system, and circulating once in about 4 hours. The circulating water system comprises an interception tank, a micro-filter, a circulating water pump, a brush tank, a biochemical tank, an ultraviolet lamp sterilization device, air energy, a water inlet and outlet pipeline and the like.
The specific method for domesticating the feed comprises the following steps of gradually increasing the addition amount of powder and gradually reducing the increase amount of fairy shrimp from the 5 th day to the 7 th day until the fry is basically completely loaded at the 7 th day; on day 8, the addition of the material B2 was started, and from day 8 to, specifically, day 10, only the fourth year was further added with a small amount of fairy shrimp and the addition amount thereof was reduced; stopping adding the powder material from day 11, and adding the B2 material and the frozen insects from day 11 to day 14, and gradually reducing the adding times of the frozen insects; on day 15, only feed B2 was added; starting to add B3 material from 16 days to 21 days, gradually increasing the addition amount of the B3 material, and gradually reducing the addition amount of B2 material; starting to add only B3 material from the 22 nd to the 24 th days; starting to add F3 material from the 25 th to the 28 th days, gradually increasing the addition amount of the F3 material, and gradually reducing the addition amount of the B3 material; from day 29 to day 30, the transition was to the addition of feed F3 only. (details of feeding method are shown in Table 1)
TABLE 1 domestication method of micropterus salmoides standard fingerling (10 ten thousand spray)
The stocking density after domestication of the feed is as follows: the specification of the fish seeds is 0.7-1 cm, and the tail length per m is 30000-500003(ii) a The specification of the fish is 1-1.5 cm, 8000-10000 tails/m3(ii) a The specification of the fingerling is 2-3 cm, 7000-7500 tails/m3(ii) a The specification of the fingerling is 4-5 cm, and the tail length is 6000-6500/m3. The stocking density of the fingerlings is shown in table 2.
TABLE 2 stocking density of fingerlings
| Fingerling size (body length) | Stocking density (tail/cubic rice) |
| 0.7～1cm | 30000～50000 |
| 1～1.5cm | 8000～10000 |
| 2～3cm | 7000～7500 |
| 4～5cm | 6000～6500 |
Sieving: according to the specification and size of the fish, the sieve with the proper size is selected, the operation process is fast, the fish does not stop beating in the fish sieve, and the small-specification fish is accelerated to drill out meshes. During sieving, generally two persons operate, one person is responsible for fishing fish and cleaning dead fish and dirty objects, the other person is responsible for sieving, one large-size fish sieve is placed, one small-size fish sieve is placed, three fish sieves are prepared, and a proper fish sieve is selected according to the size and the specification of the fish.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A method for domesticating micropterus salmoides specific fingerlings is characterized in that firstly, indoor fingerling ponds with different shapes and areas are selected according to different stages of fingerlings, the stocking density of water bloom is set to be 5-10 ten thousand pieces/cubic meter, and a bait feeding method comprises the following steps:
(1) feeding mode: feeding the bait four times a day, wherein the feeding time is 30-60min each time;
(2) the feeding range is as follows: distributing the fries in the whole pool on the 1 st to 2 nd day of the water bloom, and sprinkling in the whole pool; on day 3, the feeding range is narrowed, the aggregation degree of the fish is observed, and the fries falling to the edge are supplemented; on the 4 th day, the range is further reduced, and the feeding range is 3-5% of the area of the culture pond;
(3) feeding types: feeding 50-60 g/10 ten thousand of animals by taking the fairy shrimp as an initial live bait from day 1 to day 3; supplementing the frozen insects every time from day 4 to day 13, feeding until the fish eats and is completely dispersed, and feeding uniformly to avoid the phenomenon of large eating and small eating of fish fries; starting feed domestication from the 5 th day, wherein the feed specification is that powder, B2 material, B3 material and F3 material are sequentially increased, the material changing process is continuous and gradual, and the feeding amount is based on that the fry is actively scattered;
(4) feeding amount: the daily feeding amount accounts for 10-30% of the weight of the water bloom;
(5) sieving: according to the specification and size of the fish, the sieve with the proper size is selected, the operation process is fast, the fish does not stop beating in the fish sieve, and the small-specification fish is accelerated to drill out meshes.
2. The method of domesticating micropterus salmoides specification offspring seeds of claim 1, wherein: in the step (3), the feed domestication method comprises the following steps that on the 5 th day to the 7 th day, the adding amount of powder is gradually increased, the increasing amount of fairy shrimp is gradually reduced, and the feed is basically completely loaded until the 7 th day of the fry; on the 8 th day, starting to add B2 material, and only adding a small amount of fairy shrimp in the fourth day from the 8 th day to the 10 th day and reducing the addition amount of the fairy shrimp; stopping adding the powder material from day 11, and adding the B2 material and the frozen insects from day 11 to day 14, and gradually reducing the adding times of the frozen insects; on day 15, only feed B2 was added; starting to add B3 material from 16 days to 21 days, gradually increasing the addition amount of the B3 material, and gradually reducing the addition amount of B2 material; starting to add only B3 material from the 22 nd to the 24 th days; starting to add F3 material from the 25 th to the 28 th days, gradually increasing the addition amount of the F3 material, and gradually reducing the addition amount of the B3 material; from day 29 to day 30, the transition was to the addition of feed F3 only.
3. The method for domesticating micropterus salmoides specification offspring seeds according to claim 1, wherein the incubation conditions and the collection method of the fairy shrimp in the step (3) are as follows:
(a) incubation conditions of fairy shrimp: adopting clear and impurity-free deep well water or lake water; ensuring sufficient air supply and oxygenation; the incubation salinity is 28-30 per mill; the incubation temperature is 28-30 ℃; the incubation illumination is 2000-3000 lux illumination for 18-24 hours; the incubation time is 18-24 hours;
(b) the method for collecting the fairy shrimp comprises the following steps: closing an oxygen aeration head, sleeving an incubation barrel from an upper opening to a lower opening by using shading cloth, connecting the incubation barrel at a water outlet by using a leather hose after standing for 5 minutes, opening a water discharge switch of the incubation barrel to collect the fairy shrimp, observing that the water discharge color of a water pipe becomes light, closing the water discharge switch, standing for 10-15 minutes again, collecting the fairy shrimp again until the water color becomes light, obviously reducing the shrimp body, completely discharging the rest part, and collecting the fairy shrimp to carry out oxygen aeration for later use.
4. The method of domesticating micropterus salmoides specification offspring seeds of claim 1, wherein: in the feeding mode in the step (1), the feeding time of four times is 6: 00-7: 00 respectively; the second 10: 00-10: 30; the third is 13: 30-14: 00, and the fourth is 17: 30-18: 00.
5. The method of domesticating micropterus salmoides specification offspring seeds of claim 1, wherein: the frozen insects comprise frozen small copepods and cladocera, the melting speed of the frozen insects is adjusted by adjusting the contact area of the frozen insects and water, the situation that the frozen insects melt too fast and fish fries are not ready to eat is avoided, water quality is wasted and polluted when the frozen insects fall to the bottom of a pool, the fish which melts too slowly eat the frozen insects all the time or eat the frozen insects all the time, uneven growth is introduced, and after the frozen insects are fed for half an hour each time, fresh live fairy shrimp are supplemented, and the fish is taken as the standard for full fish.
6. The method for domesticating perch-size fingerlings of claim 1, wherein during domesticating the feed, the water quality requirements are as follows: ammonia nitrogen is lower than 0.2mg/l, nitrite is lower than 0.2mg/l, and dissolved oxygen is sufficient and is not lower than 5 mg/l; the water is changed once in 4 hours after the cultivation in the circulating water system.
7. The method for domesticating perch-specified offspring seeds of california according to claim 1, wherein the stocking density after the domestication of the feed is as follows: the specification of the fish seeds is 0.7-1 cm, and the tail length per m is 30000-500003(ii) a The specification of the fish is 1-1.5 cm, 8000-10000 tails/m3(ii) a The specification of the fingerling is 2-3 cm, 7000-7500 tails/m3(ii) a The specification of the fingerling is 4-5 cm, and the tail length is 6000-6500/m3。
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| CN115349466A (en) * | 2022-09-06 | 2022-11-18 | 深圳华大海洋科技有限公司 | Large-scale production method of micropterus salmoides fry |
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