CN112119950A - Method for food transfer domestication of larval black bass - Google Patents
Method for food transfer domestication of larval black bass Download PDFInfo
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- 230000001418 larval effect Effects 0.000 title claims abstract description 43
- 235000013305 food Nutrition 0.000 title claims abstract description 35
- 238000012546 transfer Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 241000291280 Micropterus floridanus Species 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 241000700141 Rotifera Species 0.000 claims abstract description 67
- 239000004512 granular bait Substances 0.000 claims abstract description 46
- 241001125889 Micropterus salmoides Species 0.000 claims abstract description 36
- 239000013505 freshwater Substances 0.000 claims abstract description 17
- 241000269800 Percidae Species 0.000 claims abstract description 5
- 239000004568 cement Substances 0.000 claims description 46
- 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
- 239000010865 sewage Substances 0.000 claims description 10
- 230000037406 food intake Effects 0.000 claims description 9
- 230000003203 everyday effect Effects 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- 238000009360 aquaculture Methods 0.000 claims description 6
- 244000144974 aquaculture Species 0.000 claims description 6
- 230000000249 desinfective effect Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000002354 daily effect Effects 0.000 claims description 4
- 239000011630 iodine Substances 0.000 claims description 4
- 229910052740 iodine Inorganic materials 0.000 claims description 4
- 230000000813 microbial effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000008239 natural water Substances 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 235000012631 food intake Nutrition 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000004083 survival effect Effects 0.000 abstract description 7
- 244000035744 Hura crepitans Species 0.000 description 7
- 238000009395 breeding Methods 0.000 description 7
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- 241000709785 Hermetia illucens Species 0.000 description 6
- 241000251468 Actinopterygii Species 0.000 description 5
- 241001669656 Odontobutis obscura Species 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 210000004911 serous fluid Anatomy 0.000 description 2
- 241001247197 Cephalocarida Species 0.000 description 1
- 241000239250 Copepoda Species 0.000 description 1
- 241000269795 Lateolabrax japonicus Species 0.000 description 1
- 241000133262 Nauplius Species 0.000 description 1
- 241000276618 Perciformes Species 0.000 description 1
- 241001121148 Trachidermus fasciatus Species 0.000 description 1
- 238000012136 culture method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011534 incubation Methods 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
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The invention relates to a method for food transfer domestication of larval perches, which is characterized by comprising the following steps of: 1) selecting and setting a domestication pond: 2) preparing before stocking; 3) putting the fry; 4) food transfer domestication: I. feeding live fresh water rotifers; II. After 1-3 days, feeding by using the frozen rotifers mixed with water; III, after 1-2 days, feeding by adopting a mixed feed instead, wherein the mixed feed is obtained by mixing frozen rotifer mixed water and artificial mixed granular bait into paste according to the mass ratio, and the number of the frozen rotifers is reduced in sequence according to the proportion of 1:1, 0.75:1 and 0.5:1 until the frozen rotifer is completely replaced by the artificial mixed granular bait; IV, after 1-2 days, feeding for 1-2 days by adopting artificial matching with granular baits instead; 5) daily management; 6) putting the fry into a pond: and transferring the largemouth black bass fry successfully eaten to an outdoor pond for culture, wherein the culture bait is all artificial matching granular bait. According to the invention, the ratio of the mixed feed for domestication and conversion is continuously adjusted to induce larval black bass fry to eat artificially-matched granular bait, so that the feeding cost is reduced, and the survival rate in the domestication and conversion process is improved.
Description
Technical Field
The invention belongs to the technical field of freshwater aquaculture, relates to a fish food transfer domestication aquaculture technology, and particularly relates to a food transfer domestication method for larval black bass.
Background
Lateolabrax japonicus (Micropterus salmoides) belongs to Perciformes, Sunglass, and Percopterus, also known as Micropterus salmoides and Percopterus salmoides. The largemouth black bass is suitable for the incubation water temperature of 24-26, the culture technology is not mature, the fry market is monopolized by the south for a long time, particularly, the technical bottleneck of northern autumn breeding is bait except the water temperature, the largemouth black bass is omnivorous fish mainly eaten by meat, the initial bait of the fry which is just incubated is rotifer and nauplius larva, the juvenile fish is mainly eaten by cladocera, and the juvenile fish is mainly eaten by copepods. The larval black bass bait has strong predation performance and large food intake, is a commercialized artificial bait developed aiming at larval black bass at present, but is mostly matched with domesticated fries for sale, and has higher price and high breeding cost, the important point in the condition of artificially breeding the larval black bass is the bait, the common larval black bass bait is rotifer, although the breeding cost is reduced by the artificial bait, the domestication from natural bait to artificial bait is difficult, and therefore, a method for the larval black bass domestication is urgently needed.
The following patent documents relevant to the present application are found by search, and the specific contents are as follows:
1. a method (CN109997784A) for food transfer domestication of odontobutis obscura fry baits is provided, wherein a, a net cage domestication: moving the open odontobutis obscurus fries with 20000 tail bodies of 1.8-2.2 cm in length to a net cage with the length of 3 m, the width of 3 m and the height of 1m, and carrying out sprinkling feeding on the odontobutis obscurus fries for 15 days, 2 days at the beginning, 5-6 times per day, 3-4 times per day at the third day, 30min for each time, wherein the sprinkling feeding mode is that the odontobutis obscurus fries are slowly and uniformly sprinkled on the water surface of the net cage at any time; b. domesticating and feeding in the culture pond: after the feeding of the sand box is finished, the sand box fry is transferred into a culture pond, the culture density of the sand box fry in the culture pond is not more than 3000 tails per mu, the culture bait is artificial granular bait soaked by black soldier fly larvae and black soldier fly serous fluid, the black soldier fly larvae are fed by sprinkling on the sides of the pond, the artificial granular bait is fed in a feeding table mode in the pond, the feeding condition of the sand box fry on the artificial granular bait is carefully observed every day, the feeding amount of the black soldier fly larvae is reduced along with the increase of the feeding of the fry on the artificial granular bait, the feeding of the black soldier fly larvae is stopped after the sand box fry is fed for 1 month, the artificial granular bait soaked by the black soldier fly serous fluid is used for culture, and the sand box can be used for catching the sand box fish after the domestication in the culture pond for 5 months.
2. An artificial culture method (CN109197694A) of young rough-skinned sculpin, during the desalination treatment of rough-skinned sculpin fry, through reasonable feed collocation and feeding mode, meanwhile, the technique of manufacturing dynamic bait by utilizing aeration facilities of the seedling raising pond and aerating and turning over water by using air stones avoids the waste of the feed, can save the cost of the feed, meanwhile, fertilizer water treatment is carried out before seedling placement, growth of microorganisms such as rotifer and the like is promoted, natural bait is provided for seedlings, can fully utilize the diversity of the natural bait species in the water and the rare trace elements contained in the bait to provide special nutrients lacked by the artificial feed, in addition, long-time illumination treatment is carried out in the seedling stage, and proper prolonged illumination has a promoting effect on the growth of the Trachidermus fasciatus, so that the higher survival rate of the weever seedlings is ensured, the rapid growth of the weever seedlings is favorably improved, and the yield and the quality of the weever are improved.
Through comparison of technical features, the technical structures of the above-mentioned patent publications and the present invention are different, and the creativity and novelty of the present invention application are not affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the method for the food transfer domestication of the larval micropterus salmoides, which can improve the survival rate of larval micropterus salmoides fries in the food transfer domestication process, reduce the disease probability of the larval micropterus salmoides fries, reduce the feeding cost and promote the growth and development of the larval micropterus salmoides fries.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
1. a method for food transfer domestication of larval perches is characterized by comprising the following steps:
1) selecting and setting a domestication pond: selecting a greenhouse cement pool, arranging a black shading ceiling above the greenhouse cement pool, arranging a spotlight in the middle of the black shading ceiling, and arranging microporous aeration discs at four corners of the bottom of the greenhouse cement pool;
2) preparation before stocking: a. water body disinfection: cleaning the pond, disinfecting, injecting water, and disinfecting the culture water body; b. preparing feeding domestication bait: selecting a first-generation living freshwater rotifer as natural bait; selecting the desalted SS type seawater rotifer high-density frozen blocks as later-stage feed for storage; selecting special artificial matching granulated bait for the larval bass;
3) putting the fry: putting larval black bass fry with tail body length of about 2.5 cm into a greenhouse cement pond, controlling water temperature and dissolved oxygen in water, keeping water body circulation and timely treating sewage;
4) food transfer domestication:
I. before feeding, firstly beating the wall of the pond, spraying and feeding a first-generation living freshwater rotifer biological bait after the fry are clustered, keeping water circulation and treating sewage;
II. Feeding biological bait for 1-3 days, mixing frozen rotifer with water, keeping water circulation, and treating dirt;
III, feeding the frozen rotifer mixed water for 1-2 days, and then feeding the frozen rotifer mixed water by adopting mixed feed, wherein the mixed feed is obtained by mixing the frozen rotifer mixed water and the artificial mixed granular bait into paste according to the mass ratio, and the frozen rotifer mixed water and the artificial mixed granular bait fed by the mixed feed are mixed according to the mass ratio as follows: sequentially reducing the number of the frozen rotifers according to the proportion of 1:1, 0.75:1 and 0.5:1 until the frozen rotifers are completely replaced by artificially matched granular baits, keeping water circulation and treating dirt;
IV, feeding the frozen rotifer mixed water and the artificial matching granular bait for 1-2 days, and then feeding the frozen rotifer mixed water and the artificial matching granular bait to keep water circulation and treat dirt;
v, continuously adopting artificial matching with granular bait for feeding for 1-2 days, and observing stability;
5) daily management: replacing fresh water according to period, monitoring ammonia nitrogen content and dissolved oxygen in the water, putting microbial agents in time, feeding feed in batches every day, sterilizing water body 2-3 hours after feeding each time, and screening the size of the fry at regular intervals to prevent the fry from eating after eating;
the acclimatization time for food transfer is 7 days in total, and the acclimatization time required by each step of I-V is at least 1 day;
6) putting the fry into a pond:
after the feeding domestication of the greenhouse cement pond is finished, the largemouth black bass fry successfully fed in a transferring way is transferred to an outdoor pond for culture, and the culture baits are all artificially matched granular baits.
Preferably, the center of the bottom of the cement pool of the greenhouse is provided with a water outlet covered by a dense mesh net, the top of the cement pool of the greenhouse is provided with a water inlet pipe, an included angle alpha is formed between the water inlet pipe and the gravity direction, the included angle alpha is more than 90 degrees and is more than 0 degree, and the surface of the water inlet pipe is provided with the water outlet.
Preferably, the aquaculture water is a mixture of natural water and filtered external pond water, and is sterilized by using an iodine preparation, wherein the water temperature is 20-22 ℃, the dissolved oxygen is 8.5-9.6mg/L, and the pH value is 7.5-8.5.
Preferably, the fry is thrown in the step 3), and the fry density of the larval micropterus salmoides is 200000 tails/pond.
Preferably, the feeding frequency in the step I in the step 4) food transferring domestication is 6 times/day, and the ratio of the feeding weight of the live fresh water rotifer biological bait to the total weight of largemouth larvas fry in the greenhouse cement pond is 7: 100, respectively; in the step II, the feeding frequency is 5 times/day, each time of sprinkling and feeding is 30min, the ratio of the feeding weight of the frozen rotifer mixed water to the total weight of largemouth young fries in the greenhouse cement pond is 7: 100.
preferably, the ratio of the total feeding weight of the mixed feed obtained in the step III in the step 4) food transferring domestication to the total feeding weight of largemouth fry in a greenhouse cement pond is 7: 100, respectively; step IV, the ratio of the feeding weight of the artificial matching granular bait to the total weight of largemouth black bass fry in the greenhouse cement pond is 7: 100.
preferably, in the step 6), feeding the fries in the pond in a manner of a fixed feeding table, carefully observing the ingestion of the largemouth bass fries on the artificially mixed granular bait every day, increasing the ingestion of the fries on the artificially mixed granular bait, and gradually replacing the feed with the artificially mixed granular bait.
Preferably, the density of largemouth bass fry in the fry pond in the step 6) is 3000 tails/mu.
The invention has the advantages and positive effects that:
the method firstly uses the warm-house cement pond to domesticate the food, the bait domesticated in the warm-house cement pond is live rotifer, frozen rotifer and artificially-matched granular bait, the amount of the rotifer is reduced along with the increase of the breeding time, the amount of the artificially-matched granular bait is increased, and finally, the artificially-matched granular bait is fully used, and the feeding time of the warm-house cement pond is that7And the largemouth bass fry is transferred to an outdoor soil pond for culture, the baits are artificially matched granular baits with different mouth diameters, the domestication of the food transfer is successful, the artificial baits can be quickly transferred, the survival rate of largemouth bass fry is higher in the food transfer process, the success rate of domestication in a warm-shed cement pond and outdoor soil pond culture is greatly improved, and the self-killing phenomenon of the largemouth bass is reduced by the palatable baits.
According to the method, the feed feeding amount in the step of feeding the mixed feed for domestication and conversion and the proportion of the frozen rotifer mixed with water and the artificial matching granular bait are continuously adjusted, so that larval fries of the larval black bass are induced to eat the artificial matching granular bait, the feeding cost is reduced, the disease probability of the larval black bass fries is reduced, and the survival rate in the process of domestication and conversion is improved.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Example 1
A method for food transfer domestication of larval perches comprises the following steps:
3) selecting and setting a domestication pond: selecting a greenhouse cement pool, arranging a black shading ceiling above the greenhouse cement pool, arranging a spotlight in the middle of the black shading ceiling, and arranging microporous aeration discs at four corners of the bottom of the greenhouse cement pool;
4) preparation before stocking: a. water body disinfection: sterilizing the aquaculture water body by using an iodine preparation; b. preparing feeding domestication bait: selecting live fresh water rotifers as natural baits; selecting high-density rotifer frozen blocks as later-stage feed for storage; selecting special artificial matching granulated bait for the larval bass;
3) putting the fry: putting larval fries of the larval bass into a greenhouse cement pond, controlling water temperature and dissolved oxygen in water, keeping water circulation and timely treating sewage;
4) food transfer domestication:
I. before feeding, firstly beating the wall of the pond, spraying live fresh water rotifer biological bait after fry clustering, keeping water circulation and treating sewage;
II. Feeding biological bait for 1-3 days, mixing frozen rotifer with water, keeping water circulation, and treating dirt;
III, feeding the frozen rotifers with mixed water for 1-2 days, and then feeding the rotifers with mixed feed, wherein the mixed feed is obtained by mixing the frozen rotifers with mixed water and artificially matched granular bait in a mass ratio to form paste, the number of the frozen rotifers is sequentially reduced according to the proportion of 1:1, 0.75:1 and 0.5:1, water circulation is kept, and dirt is treated;
IV, feeding the frozen rotifer mixed water and the artificial matching granular bait for 1-2 days, and then feeding the frozen rotifer mixed water and the artificial matching granular bait to keep water circulation and treat dirt;
v, continuously adopting artificial matching with granular bait for feeding for 1-2 days, and observing stability;
the domestication time for food transfer is 7 days in total, and the domestication time required by each step of the I-V is at least 1 day;
5) daily management: replacing fresh water according to period, monitoring ammonia nitrogen content and dissolved oxygen in the water, putting microbial agents in time, feeding feed in batches every day, sterilizing water body 2-3 hours after feeding each time, and screening the size of the fry at regular intervals to prevent the fry from eating after eating;
6) putting the fry into a pond:
after the feeding domestication of the greenhouse cement pond is finished, the largemouth black bass fry successfully fed in a transferring way is transferred to an outdoor pond for culture, and the culture baits are all artificially matched granular baits.
Example 2
A method for food transfer domestication of larval perches comprises the following steps:
5) selecting and setting a domestication pond: selecting a greenhouse cement pool, wherein the size of the greenhouse is 30 square meters (the length is 5m, the width is 6m, and the height is 1m), a black shading ceiling is arranged above the greenhouse cement pool, the middle part of the black shading ceiling is provided with a spotlight, the spotlight is provided with a lampshade, the lampshade is of a conical structure with a good gathering effect, microporous aeration plates are arranged at four corners of the bottom of the greenhouse cement pool, the center of the bottom of the greenhouse cement pool is provided with a water outlet covered by a dense mesh net, the top of the greenhouse cement pool is provided with a water inlet pipe, an included angle alpha is formed between the water inlet pipe and the gravity direction, the angle alpha is more than 90 degrees and more;
6) preparation before stocking: a. water body disinfection: cleaning and disinfecting the pond, injecting natural water and filtered external pond water into the pond after the pond is cleaned and disinfected, and finally disinfecting the aquaculture water body by using an iodine preparation, wherein the water temperature is 20-22 ℃, the dissolved oxygen is 8.5-9.6mg/L, the pH value is 7.5-8.5, and the water body circulation is kept; b. preparing feeding domestication bait: selecting a first-generation living freshwater rotifer as natural bait; selecting the desalted SS type seawater rotifer high-density frozen blocks as later-stage feed for storage; selecting special artificial matching granulated bait for the larval bass;
3) putting the fry: putting larval black bass fry with tail body length of about 2.5 cm into a greenhouse cement pond, wherein the density of the larval black bass fry is 200000 per pond, controlling water temperature and dissolved oxygen in water, keeping water body circulation and timely treating sewage;
4) food transfer domestication:
I. before feeding, firstly beating the wall of the pond, carrying out lateral line mechanical sensation stimulation domestication on ingestion of largemouth bass fry, sprinkling living fresh water rotifer biological bait of a first generation after the fry is clustered, wherein the feeding frequency is 6 times per day, promoting the fry to establish good ingestion reaction, and the ratio of the feeding weight of the living fresh water rotifer biological bait to the total weight of the largemouth bass fry in a greenhouse cement pond is 7: 100, keeping water circulation and treating sewage;
II. 1-3 days after the biological bait is fed, adopting the frozen rotifer to mix water for feeding, wherein the feeding frequency is 5 times/day, and the feeding is carried out for 30min each time, the feeding mode is that water is scooped up and uniformly sprinkled at the aeration position of an aeration disc, and the ratio of the feeding weight of the frozen rotifer mixing water to the total weight of largemouth black bass fry in a greenhouse cement pond is 7: 100, keeping water circulation and treating sewage;
III, feeding the frozen rotifers with mixed water for 1-2 days, and then feeding the rotifers with mixed feed, wherein the ratio of the total feeding weight to the total feeding weight of the mixed feed to the total weight of largemouth black bass fry in a greenhouse cement pond is 7: 100, mixing frozen rotifer mixing water and artificial mixed granular bait into paste according to the mass ratio to obtain the mixed feed, and specifically feeding the frozen rotifer mixing water and artificial mixed granular bait of the mixed feed according to the mass ratio as follows: sequentially reducing the number of the frozen rotifers according to the proportion of 1:1, 0.75:1 and 0.5:1 until the frozen rotifers are completely replaced by artificially matched granular baits, keeping water circulation and treating dirt;
IV, after the frozen rotifer mixed water and the artificial cooperation granular bait are fed for 1-2 days, feeding is carried out by adopting the artificial cooperation granular bait instead, and the ratio of the feeding weight of the artificial cooperation granular bait to the total weight of largemouth black bass fry in the greenhouse cement pond is 7: 100, keeping water circulation and treating sewage;
v, continuously adopting artificial matching with granular bait for feeding for 1-2 days, and observing stability;
the domestication time for food transfer is 7 days in total, and the domestication time required by each step of the I-V is at least 1 day;
5) daily management: replacing fresh water according to period, monitoring ammonia nitrogen content and dissolved oxygen in the water, putting microbial agents in time, feeding feed in batches every day, sterilizing water body 2-3 hours after feeding each time, and screening the size of the fry at regular intervals to prevent the fry from eating after eating;
6) putting the fry into a pond:
the method comprises the following steps of firstly, feeding largemouth black bass fry in a greenhouse, feeding the largemouth black bass fry in an outdoor pond, feeding the largemouth black bass fry in the outdoor pond to an outdoor soil pond, wherein the breeding density of the largemouth black bass fry is not more than 3000 tails per mu, the breeding bait is full-value artificial matching granular bait, feeding the largemouth black bass fry in a fixed feeding table mode, carefully observing the ingestion condition of the largemouth black bass fry on the artificial matching granular bait every day, increasing the ingestion of the largemouth black bass fry on the artificial matching granular bait, gradually replacing proper grain-size feed, and screening the largemouth black bass fry every 15 days to.
The method is characterized in that firstly feeding is taming by a greenhouse cement pond, baits for taming the feeding by the greenhouse cement pond are live rotifers, frozen rotifers and artificially-matched granular baits, the amount of the rotifers is reduced along with the increase of the culture time, the amount of the artificially-matched granular baits is increased, finally, the artificially-matched granular baits are fully used, the feeding time of the greenhouse cement pond is 7 days, and then the greenhouse cement pond is moved to an outdoor soil pond for culture, the baits are the artificially-matched granular baits with different mouth diameters, so that the domestication of the feeding is successful, the artificial baits can be quickly fed, the survival rate of largemouth largemoutcropterus fries is high in the feeding process, the success rate of taming the feeding in the greenhouse cement pond and the culture in the outdoor soil pond is greatly improved, and the self-killing phenomenon of.
According to the method, the feed feeding amount in the step of feeding the mixed feed for domestication and conversion and the proportion of the frozen rotifer mixed with water and the artificial matching granular bait are continuously adjusted, so that larval fries of the larval black bass are induced to eat the artificial matching granular bait, the feeding cost is reduced, the disease probability of the larval black bass fries is reduced, and the survival rate in the process of domestication and conversion is improved.
Claims (8)
1. A method for food transfer domestication of larval perches is characterized by comprising the following steps:
1) selecting and setting a domestication pond: selecting a greenhouse cement pool, arranging a black shading ceiling above the greenhouse cement pool, arranging a spotlight in the middle of the black shading ceiling, and arranging microporous aeration discs at four corners of the bottom of the greenhouse cement pool;
2) preparation before stocking: a. water body disinfection: cleaning the pond, disinfecting, injecting water, and disinfecting the culture water body; b. preparing feeding domestication bait: selecting a first-generation living freshwater rotifer as natural bait; selecting the desalted SS type seawater rotifer high-density frozen blocks as later-stage feed for storage; selecting special artificial matching granulated bait for the larval bass;
3) putting the fry: putting larval black bass fry with tail body length of about 2.5 cm into a greenhouse cement pond, controlling water temperature and dissolved oxygen in water, keeping water body circulation and timely treating sewage;
4) food transfer domestication:
I. before feeding, firstly beating the wall of the pond, spraying and feeding a first-generation living freshwater rotifer biological bait after the fry are clustered, keeping water circulation and treating sewage;
II. Feeding biological bait for 1-3 days, mixing frozen rotifer with water, keeping water circulation, and treating dirt;
III, feeding the frozen rotifer mixed water for 1-2 days, and then feeding the frozen rotifer mixed water by adopting mixed feed, wherein the mixed feed is obtained by mixing the frozen rotifer mixed water and the artificial mixed granular bait into paste according to the mass ratio, and the frozen rotifer mixed water and the artificial mixed granular bait fed by the mixed feed are mixed according to the mass ratio as follows: sequentially reducing the number of the frozen rotifers according to the proportion of 1:1, 0.75:1 and 0.5:1 until the frozen rotifers are completely replaced by artificially matched granular baits, keeping water circulation and treating dirt;
IV, feeding the frozen rotifer mixed water and the artificial matching granular bait for 1-2 days, and then feeding the frozen rotifer mixed water and the artificial matching granular bait to keep water circulation and treat dirt;
v, continuously adopting artificial matching with granular bait for feeding for 1-2 days, and observing stability;
the acclimatization time for food transfer is 7 days in total, and the acclimatization time required by each step of I-V is at least 1 day;
5) daily management: replacing fresh water according to period, monitoring ammonia nitrogen content and dissolved oxygen in the water, putting microbial agents in time, feeding feed in batches every day, sterilizing water body 2-3 hours after feeding each time, and screening the size of the fry at regular intervals to prevent the fry from eating after eating;
6) putting the fry into a pond:
after the feeding domestication of the greenhouse cement pond is finished, the largemouth black bass fry successfully fed in a transferring way is transferred to an outdoor pond for culture, and the culture baits are all artificially matched granular baits.
2. The method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: the center of the bottom of the cement pool of the greenhouse is provided with a water outlet covered by a dense mesh net, the top of the cement pool of the greenhouse is provided with a water inlet pipe, an included angle alpha is formed between the water inlet pipe and the gravity direction, the included angle alpha is more than 90 degrees and is more than 0 degree, and the surface of the water inlet pipe is provided with the water outlet.
3. The method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: the aquaculture water body is formed by mixing natural water and filtered external pond water, and is disinfected by using an iodine preparation, wherein the water temperature is 20-22 ℃, the dissolved oxygen is 8.5-9.6mg/L, and the pH value is 7.5-8.5.
4. The method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: step 3), putting the fries into a fry, wherein the fry density of the larval weever is 200000 per pond.
5. The method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: feeding frequency in the step I in the step 4) food transferring domestication is 6 times/day, and the ratio of the feeding weight of the live fresh water rotifer biological bait to the total weight of largemouth young fries in the greenhouse cement pond is 7: 100, respectively; in the step II, the feeding frequency is 5 times/day, each time of sprinkling and feeding is 30min, the ratio of the feeding weight of the frozen rotifer mixed water to the total weight of largemouth young fries in the greenhouse cement pond is 7: 100.
6. the method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: and 4) the ratio of the feeding total weight of the mixed feed obtained in the step III in the food transfer domestication to the feeding weight of the largemouth black bass fry in the greenhouse cement pond is 7: 100, respectively; step IV, the ratio of the feeding weight of the artificial matching granular bait to the total weight of largemouth black bass fry in the greenhouse cement pond is 7: 100.
7. the method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: and 6) feeding the fries in the pond, wherein the feeding mode of the soil pond culture is a fixed feeding table mode, the ingestion condition of the largemouth black bass fries on the manually-matched granular bait is carefully observed every day, the food intake of the fries on the manually-matched granular bait is increased, and the fries gradually replace the feed with the matched grain size.
8. The method for food transfer acclimatization of larval bass of claim 1, which is characterized in that: and 6) putting the fries into the pond, wherein the density of the largemouth bass fries is 3000 per mu.
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