CN103004660A - Parent fish culturing method for scaled artificial breeding of finless ell - Google Patents
Parent fish culturing method for scaled artificial breeding of finless ell Download PDFInfo
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- CN103004660A CN103004660A CN2012105557309A CN201210555730A CN103004660A CN 103004660 A CN103004660 A CN 103004660A CN 2012105557309 A CN2012105557309 A CN 2012105557309A CN 201210555730 A CN201210555730 A CN 201210555730A CN 103004660 A CN103004660 A CN 103004660A
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Abstract
The invention discloses a parent fish culturing method for scaled artificial breeding of a finless ell. The method has the advantages of simplicity and easy implementation, and is suitable for the scaled artificial breeding of the finless ell. The method comprises the following culturing steps of 1, erecting a net case; 2, throwing brood fishes; 3, domesticating food intake; 4, carrying out the first time of physical reinforcing culturing; 5, carrying out the first time of overwintering; 6, growing and feeding in the second year; 7, carrying out the second time of physical reinforcing culturing; 8, carrying out the second time of overwintering; 9, carrying out the gonadal reinforcing culturing; and 10, carrying out the artificial breeding, so as to obtain the male and female parent fishes of the finless ell with large brood amount, high breeding capability and high sperm-egg quality. The culturing method provided by the invention has the advantages that the survival rate of the recovered parent fishes can reach more than 95%, the brood amount of one male fish with the weight of 100g can reach 600 to 800, and the hatchability of fries can reach more than 98%.
Description
Technical field
The invention belongs to aquaculture field, be specifically related to a kind of parent population cultural method of swamp eel large-scale artificial breeding, method is simple, can obtain the swamp eel male and female parent population that fish brood amount is large, fertility is strong, smart archiblast amount is high.
Background technology
Swamp eel (Monopterus albus) is the subtropics fish, has another name called yellow eel, sieve fish, field eel, Changyu, yellow ginseng, without squama son, Tian Can etc., is under the jurisdiction of Symbranchir, closes gill section; The whole world only has a kind, i.e. swamp eel in the Symbranchir.Be distributed widely in Japan, Thailand, Indonesia, Philippine, Malaysia, India, Japan, Korea and the China etc. in Southeast Asia, all there is distribution in China except the Qinghai-Tibet Platean, especially with In Middle And Lower Reaches of Changjiang River, distribution density is large, output is high, is a kind of important economic fish.
In general, the parent fish rearing of fish tool in the artificial propagation process of fish is of great significance.Whether the parent fish rearing method is correct, will directly affect the incubation rate of fish brood amount, fertility and the seedling of parent population.At present, in the artificial propagation process of swamp eel, there is no special breeding method for the swamp eel parent population, but adopt general adult fish culture method to carry out parent fish rearing.Therefore, seriously influenced the artificial propagation effect of swamp eel.We have invented the special parent fish rearing method for the swamp eel artificial propagation of a cover through for many years research.
At present, the cultural method of ricefield eel adult fish mainly contains two kinds: a kind of is to throw in wild large size seedling seed at the beginning of annual 6 months, is generally 10 tail/jin, supports can reach 3 ~ 4 tail/jin to mid-October.Feed in the breeding process is fish gruel and artifical compound feed, and feed ratio is 6:4 in the tame and docile food stage, cultivate to be 4:6, simultaneously, also need in feed, add a large amount of protect the liver, the medicine of anti-parasite and enteritis class, then listing.The characteristics of this cultural method are that the culture-cycle is short, do not have the risk of overwintering death.But because growth rate is too fast, parent population physique is relatively poor, and the quality of ovum is also relatively poor, is unfavorable for carrying out artificial propagation.Another kind of mode is annual mid or late July to advance to throw in the wild seed than small dimension, is generally 25 ~ 30 tail/jin, finishes the food process of taming and dociling before the beginning of autumn, and taming and dociling the bait material is fish gruel and artifical compound feed, and feed ratio is 6:4 in the tame and docile food stage, then survives the winter.The coming year from mid or late April is opened food, and supports to mid-October always, generally can reach 2 ~ 3 tail/jin.The characteristics of this breeding way are that the culture-cycle is longer, and parent population physique and ovum quality are all better.And the raun individuality is larger, and corresponding fish brood amount is also larger, and some are large reaches 800 ~ 1000/tail.But the milter quantity in the parent fish population seldom, still can't satisfy the needs of artificial propagation.
Swamp eel and other fish have a very large difference, i.e. sex reversal phenomenon.At natural world, swamp eel all is raun at the initial stage of life, must be through after breeding at least one times, and raun just can change into milter.In the swamp eel of propagating artificially at present, as long as the fingerling specification of throwing in is at 15 tails/below the jin, then almost all be raun.Want the large-scale artificial breeding of swamp eel, just must carry out the parent population of swamp eel and cultivate specially.
Summary of the invention
The objective of the invention is to be to provide a kind of parent population cultural method of swamp eel large-scale artificial breeding, in order to obtain the swamp eel male and female parent population that fish brood amount is large, fertility is strong, smart archiblast amount is high, method is simple.
In order to achieve the above object, the present invention adopts following technical measures:
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: the swamp eel parent population is cultivated and cultivates in net cage, and raun and milter be cultivation separately.The net cage size is 2 * 2M
2, mesh is 0.7mm, and the depth of water is 15 ~ 25cm in the net cage, and net cage exceeds the water surface 40 ~ 60cm.Each net cage peanut 100kg that aborts.Net cage sets up number determines that according to the total amount of throwing in fingerling the fingerling quantity that each net cage is thrown in is seen step 2.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in fingerling specification raun is the wild fingerling of 15 ~ 25 tail/jin, and breeding density is 3.5 ~ 4.5 jin/M
2Milter is 4 ~ 8 tail/jin, and breeding density is 7 ~ 9 jin/M
2Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. tame and docile food: the input fingerling begins to tame and docile food and feeds after 3 days.Adopt the rotten and swamp eel special feed mixed feeding of earthworm during taming and dociling food, the proportioning of earthworm gruel and feed is 9 ~ 7:1 ~ 3 by weight part, and every day, feeding volume was 1 ~ 3% of fish body weight.If the milter after the breeding can without this step, directly enter next step.
4. the 1st cultivation of building up health: swamp eel survive the winter front 1 month (mid-September) beginning.Earthworm in feed proportioning rotten and feed is adjusted into by weight 8 ~ 6:2 ~ 4 part, and every day, feeding volume was 3 ~ 5% of fish body weight, and interpolation protecting the liver the class medicine in feed every day simultaneously, and dosage is 15 ~ 25g/kg feed.
5. survive the winter for the 1st time: when swamp eel survives the winter (October ~ Second Year April) stop feeding.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
6. growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always.Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 7 ~ 5:3 ~ 5 part, and every day, feeding volume was 6 ~ 8% of fish body weight.
7. the 2nd cultivation of building up health: swamp eel survive the winter front 1 month (mid-September) beginning.Earthworm in feed proportioning rotten and feed is adjusted into by weight 8 ~ 6:2 ~ 4 part, every day, feeding volume was 3 ~ 5% of fish body weight, that adds simultaneously a certain amount of (15 ~ 25g/kg feed adds total amount and calculates according to the feed weight of throwing something and feeding every day) in feed every day protects the liver the class medicine.
8. survive the winter for the 2nd time: when swamp eel survives the winter (October ~ Second Year April) stop feeding.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
9. strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds late May, when water temperature reaches more than 26 ℃ always.Rotten and the feed ratio of earthworm is 8 ~ 6:2 ~ 4 part in the feed, and add B B-complex in the feed every day while, and dosage is 20 ~ 30g/kg feed, and every day, feeding volume was 6 ~ 8% of fish body weight.
10. artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
The described class medicine that protects the liver is: in this patent invention process, use be glucurolactone, manufacturer is that foreign bio tech ltd is moistened in Changsha;
Described leaves of plants leaven is: in this patent invention process, use be green nuclear gold, manufacturer is the Yi Pule of Shenzhen bio tech ltd;
Described B B-complex is: in this patent invention process, the compound vitamin manufacturer that uses is the strange Industrial Co., Ltd. in mountain, Shanxi;
Described earthworm gruel is: fresh or freezing earthworm blends makes;
Described swamp eel special feed is: in this patent invention process, the feed brand of using is the emerging board of good fortune, and manufacturer is Xiamen biological feedstuff Co., Ltd.
Feeds utilized and the medicine of the present invention is not limited to the above company's product, and commercially available all can use.
Utilize cultural method provided by the invention, the survival rate after parent population is reclaimed can reach more than 95%, and the raun fish brood amount of 100g body weight can reach 600 ~ 800, and the seedling incubation rate can reach more than 98%.
Compared with prior art, the present invention has the following advantages:
1. the parent population physique that adopts swamp eel parent population cultivation to cultivate obviously is better than the parent population of general merchandise fish culture method cultivation.After artificial propagation, the survival rate after the parent population of parent population cultivation is reclaimed can reach more than 95%, and the general merchandise fish is only less than 30% survival rate.
2. the raun that the raun fish brood amount that adopts swamp eel parent population cultivation to cultivate cultivates apparently higher than general merchandise fish culture method.The raun fish brood amount of the 100g body weight that the parent population cultivation is cultivated can reach 600 ~ 800, and the raun fish brood amount of general merchandise fish 100g body weight only has 300 ~ 500.
3. the parent population of adopting swamp eel parent population cultivation to cultivate is through the seedling incubation rate of the artificial propagation seedling incubation rate apparently higher than the general merchandise fish.The seedling incubation rate of parent population cultivation can reach more than 98%, and the seedling incubation rate of general merchandise fish only has about 60%.
With existing swamp eel marketable fish cultural method relatively, of the present invention have a following characteristics:
Description of drawings:
Fig. 1 is a kind of techniqueflow chart of parent population cultural method of swamp eel large-scale artificial breeding
Embodiment:
Embodiment 1:
Below to cultivate 600 jin, forming rear specification is that 4 tails/jin swamp eel raun is example, and the cultural method of swamp eel raun is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: need to set up 10 net cages in the pond: mesh is 0.7mm, and area is 2 * 2M
2, the depth of water is 15cm in the net cage, net cage exceeds water surface 60cm.Each net cage peanut 100kg that aborts.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in the fingerling specification is the wild fingerling of 15 tail/jin, and breeding density is 4.5 jin/M
2Each net cage is thrown in 18 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. tame and docile food: the input fingerling begins to tame and docile food and feeds after 3 days.Tame and docile and adopt the rotten and swamp eel special feed mixed feeding of earthworm between Shiqi, earthworm gruel and feed ratio are 7:3 part, and every day, feeding volume was 3% of fish body weight.
4. the 1st cultivation of building up health: the beginning in front 1 month of surviving the winter.Earthworm gruel and feed ratio in the feed are adjusted into 6:4 part, add simultaneously protecting the liver the class medicine in feed every day, and dosage is the 25g/kg feed, and every day, feeding volume was 3% of fish body weight.
5. survive the winter for the 1st time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
6. growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always.Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 7:3 part, and every day, feeding volume was 6% of fish body weight.
7. the 2nd cultivation of building up health: the swamp eel beginning in front 1 month of surviving the winter.Rotten and the feed ratio of earthworm in the feed is adjusted into 6:4 part, simultaneously in the feed every day interpolation 225g protect the liver the class medicine, dosage is the 25g/kg feed, every day, feeding volume was 3% of fish body weight.
8. survive the winter for the 2nd time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
9. strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds late May, when water temperature reaches more than 26 ℃ always.Earthworm gruel and feed ratio are 6:4 part in the feed, add B B-complex in the feed every day simultaneously, and dosage is the 20g/kg feed, and every day, feeding volume was 6% of fish body weight.
10. artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
The described class medicine that protects the liver is: in this patent invention process, use be glucurolactone, manufacturer is that foreign bio tech ltd is moistened in Changsha
Described leaves of plants leaven is: in this patent invention process, use be green nuclear gold, manufacturer is the Yi Pule of Shenzhen bio tech ltd
Described B B-complex is: in this patent invention process, the compound vitamin manufacturer that uses is the strange Industrial Co., Ltd. in mountain, Shanxi
Described earthworm gruel is: fresh or freezing earthworm blends makes
Described swamp eel special feed is: in this patent invention process, the feed brand of using is the emerging board of good fortune, and manufacturer is Xiamen biological feedstuff Co., Ltd
After this embodiment finished, the raun fish brood amount mean that the survival rate after parent population is reclaimed can reach 95.8%, 100g body weight can reach 663, and the seedling incubation rate can reach 98.5%.
Embodiment 2:
Below to cultivate 5000 jin, forming rear specification is that 5 tails/jin swamp eel raun is example, and the cultural method of swamp eel raun is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: needing to set up 100 meshes in the pond is 0.7mm, and area is 2 * 2M
2, the depth of water is 20cm in the net cage, net cage exceeds water surface 50cm.Each net cage peanut 100kg that aborts.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in the fingerling specification is the wild fingerling of 20 tail/jin, and breeding density is 4.0 jin/M
2Each net cage is thrown in 16 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. tame and docile food: the input fingerling begins to tame and docile food and feeds after 3 days.Tame and docile and adopt the rotten and swamp eel special feed mixed feeding of earthworm between Shiqi, earthworm gruel and feed ratio are 8:2 part, and every day, feeding volume was 2% of fish body weight.
4. the 1st cultivation of building up health: the beginning in front 1 month of surviving the winter.Earthworm gruel and feed ratio in the feed are adjusted into 7:3 part, add simultaneously protecting the liver the class medicine in feed every day, and dosage is the 20g/kg feed, and every day, feeding volume was 4% of fish body weight.
5. survive the winter for the 1st time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
6. growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always.Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 6:4 part, and every day, feeding volume was 7% of fish body weight.
7. the 2nd cultivation of building up health: the swamp eel beginning in front 1 month of surviving the winter.Rotten and the feed ratio of earthworm in the feed is adjusted into 7:3 part, simultaneously in the feed every day interpolation 2kg protect the liver the class medicine, dosage is the 20g/kg feed, every day, feeding volume was 4% of fish body weight.
8. survive the winter for the 2nd time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
9. strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds late May, when water temperature reaches more than 26 ℃ always.Earthworm gruel and feed ratio are 7:3 part in the feed, add B B-complex in the feed every day simultaneously, and dosage is the 25g/kg feed, and every day, feeding volume was 7% of fish body weight.
10. artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
After this embodiment finished, the raun fish brood amount mean that the survival rate after parent population is reclaimed can reach 96.4%, 100g body weight can reach 703, and the seedling incubation rate can reach 98.2%.
Embodiment 3:
Below to cultivate 20000 jin, forming rear specification is that 6 tails/jin swamp eel raun is example, and the cultural method of swamp eel raun is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: needing to set up 500 meshes in the pond is 0.7mm, and area is 2 * 2M
2, the depth of water is 25cm in the net cage, net cage exceeds water surface 40cm.Each net cage peanut 100kg that aborts.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in the fingerling specification is the wild fingerling of 25 tail/jin, and breeding density is 3.5 jin/M
2Each net cage is thrown in 14 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. tame and docile food: the input fingerling begins to tame and docile food and feeds after 3 days.Tame and docile and adopt the rotten and swamp eel special feed mixed feeding of earthworm between Shiqi, earthworm gruel and feed ratio are 9:1 part, and every day, feeding volume was 1% of fish body weight.
4. the 1st cultivation of building up health: the beginning in front 1 month of surviving the winter.Earthworm gruel and feed ratio in the feed are adjusted into 8:2 part, add simultaneously protecting the liver the class medicine in feed every day, and dosage is the 15g/kg feed, and every day, feeding volume was 5% of fish body weight.
5. survive the winter for the 1st time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
6. growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always.Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 5:5 part, and every day, feeding volume was 8% of fish body weight.
7. the 2nd cultivation of building up health: the swamp eel beginning in front 1 month of surviving the winter.Rotten and the feed ratio of earthworm in the feed is adjusted into 8:2 part, simultaneously in the feed every day interpolation 7.5kg protect the liver the class medicine, dosage is the 15g/kg feed, every day, feeding volume was 5% of fish body weight.
8. survive the winter for the 2nd time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
9. strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds late May, when water temperature reaches more than 26 ℃ always.Earthworm gruel and feed ratio are 8:2 part in the feed, add B B-complex in the feed every day simultaneously, and dosage is the 30g/kg feed, and every day, feeding volume was 8% of fish body weight.
10. artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
After this embodiment finished, the raun fish brood amount mean that the survival rate after parent population is reclaimed can reach 97.1%, 100g body weight can reach 695, and the seedling incubation rate can reach 98.7%.
Embodiment 4:
Below to cultivate 600 jin, forming rear specification is that 2 tails/jin swamp eel milter is example, and the cultural method of swamp eel milter is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: needing to set up 10 meshes in the pond is 0.7mm, and area is 2 * 2M
2, the depth of water is 15cm in the net cage, net cage exceeds water surface 60cm.Each net cage peanut 100kg that aborts.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throw in the parent population after the breeding that the fingerling specification is 4 tail/jin, breeding density is 9.0 jin/M
2Each net cage is thrown in 36 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. tame and docile food: this step is omitted.
4. the 1st cultivation of building up health: fingerling is thrown in net cage and is begun after 3 days.Earthworm gruel and feed ratio in the feed are adjusted into 6:4 part, add simultaneously protecting the liver the class medicine in feed every day, and dosage is the 25g/kg feed, and every day, feeding volume was 3% of fish body weight.
5. survive the winter for the 1st time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
6. growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always.
Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 7:3 part, and every day, feeding volume was 6% of fish body weight.
7. the 2nd cultivation of building up health: the swamp eel beginning in front 1 month of surviving the winter.Rotten and the feed ratio of earthworm in the feed is adjusted into 6:4 part, simultaneously in the feed every day interpolation 225g protect the liver the class medicine, dosage is the 25g/kg feed, every day, feeding volume was 3% of fish body weight.
8. survive the winter for the 2nd time: stop feeding when swamp eel survives the winter.Survive the winter and front water peanut is sprayed 1 leaves of plants leaven (usage amount is with reference to specification), the depth of water in the net cage is adjusted to 20cm.
9. strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds late May, when water temperature reaches more than 26 ℃ always.Earthworm gruel and feed ratio are 6:4 part in the feed, add B B-complex in the feed every day simultaneously, and dosage is the 20g/kg feed, and every day, feeding volume was 6% of fish body weight.
10. artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
11. after this embodiment finished, the raun fish brood amount mean that the survival rate after parent population is reclaimed can reach 96.8%, 100g body weight can reach 721, the seedling incubation rate can reach 98.9%.
Embodiment 5:
Below to cultivate 5000 jin, specification is that 3 tails/jin swamp eel milter is example, and the cultural method of swamp eel milter is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1. net cage sets up: needing to set up 100 meshes in the pond is 0.7mm, and area is 2 * 2M
2, the depth of water is 20cm in the net cage, net cage exceeds water surface 50cm.Each net cage peanut 100kg that aborts.
2. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in the fingerling specification is the wild fingerling of 6 tail/jin, and breeding density is 8.0 jin/M
2Each net cage is thrown in 32 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3. after this step and case study on implementation two are identical.
After this embodiment finished, the survival rate after parent population is reclaimed can reach more than 95%, and the raun fish brood amount of 100g body weight can reach 600 ~ 800, and the seedling incubation rate can reach more than 98%.
Embodiment 6:
Below to cultivate 20000 jin, specification is that 4 tails/jin swamp eel milter is example, and the cultural method of swamp eel milter is described.
A kind of parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
4. net cage sets up: needing to set up 500 meshes in the pond is 0.7mm, and area is 2 * 2M
2, the depth of water is 25cm in the net cage, net cage exceeds water surface 40cm.Each net cage peanut 100kg that aborts.
5. input fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃.Throwing in the fingerling specification is the wild fingerling of 8 tail/jin, and breeding density is 7.0 jin/M
2Each net cage is thrown in 28 jin of wild fingerlings.Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
6. after this step and case study on implementation three are identical.
After this embodiment finished, the raun fish brood amount mean that the survival rate after parent population is reclaimed can reach 96.4%, 100g body weight can reach 652, and the seedling incubation rate can reach 98.1%.
Claims (1)
1. the parent population cultural method of swamp eel large-scale artificial breeding, its step is as follows:
1) net cage sets up: the swamp eel parent population is cultivated and cultivates in net cage, and raun and milter be cultivation separately; The net cage size is 2 * 2M
2, mesh is 0.7mm, and the depth of water is 15 ~ 25cm in the net cage, and net cage exceeds the water surface 40 ~ 60cm; Each net cage peanut 100kg that aborts;
Net cage sets up number determines that according to the total amount of throwing in fingerling the fingerling quantity that each net cage is thrown in is seen step 2);
2) throw in fingerling: the release time is annual mid or late July, and water temperature is constant in more than 26 ℃; Throwing in fingerling specification raun is the wild fingerling of 15 ~ 25 tail/jin, and breeding density is 3.5 ~ 4.5 jin/M
2Milter is 4 ~ 8 tail/jin, and breeding density is 7 ~ 9 jin/M
2Throw in front 1 week of fingerling, with the povidone iodine sterilization, concentration is 5g/M in the net cage
2
3) tame and docile food: the input fingerling begins to tame and docile food and feeds after 3 days; Adopt the rotten and swamp eel special feed mixed feeding of earthworm during taming and dociling food, the proportioning of earthworm gruel and feed is 9 ~ 7:1 ~ 3 by weight part, and every day, feeding volume was 1 ~ 3% of fish body weight; Milter after the breeding without this step, directly enters step 4);
4) the 1st cultivation of building up health: mid-September, earthworm in feed proportioning rotten and feed is adjusted into by weight 8 ~ 6:2 ~ 4 part, and every day, feeding volume was 3 ~ 5% of fish body weight, and interpolation protecting the liver the class medicine in feed every day simultaneously, and dosage is 15 ~ 25g/kg feed;
5) survive the winter for the 1st time: swamp eel survives the winter October ~ Second Year stops feeding April, survives the winter front water peanut to be sprayed the leaves of plants leaven 1 time, and the depth of water in the net cage is adjusted to 20cm;
6) growth in the 2nd year is fed: feed from mid-April, water temperature reaches beginning more than 15 ℃, feeds to the beginning of autumn always; Feed adopts the rotten and swamp eel special feed mixed feeding of earthworm, and earthworm gruel and feed ratio are 7 ~ 5:3 ~ 5 part, and every day, feeding volume was 6 ~ 8% of fish body weight;
7) the 2nd cultivation of building up health: swamp eel survives the winter and begins front mid-September, earthworm in feed proportioning rotten and feed is adjusted into by weight 8 ~ 6:2 ~ 4 part, every day, feeding volume was 3 ~ 5% of fish body weight, added simultaneously protecting the liver the class medicine in feed every day, and dosage is 15g ~ 25g/kg feed;
8) survive the winter for the 2nd time: swamp eel survives the winter October ~ Second Year stops feeding April, survives the winter front water peanut to be sprayed the leaves of plants leaven 1 time, and the depth of water in the net cage is adjusted to 20cm;
9) strengthening sexual gland cultivates: feed from mid-April, water temperature reaches beginning more than 15 ℃, feed late May always, when water temperature reaches more than 26 ℃, rotten and the feed ratio of earthworm is 8 ~ 6:2 ~ 4 part in the feed, add B B-complex in the feed every day simultaneously, dosage is 20 ~ 30g/kg feed, and every day, feeding volume was 6 ~ 8% of fish body weight;
10) artificial propagation: carry out front 3 days parent populations of artificial propagation and stop eating, pull parent population out and select the large raun of fish brood amount to carry out artificial propagation.
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| CN103340169A (en) * | 2013-07-19 | 2013-10-09 | 湖州广源水产养殖有限公司 | Method for breeding finless eels in two-year period |
| CN103340170A (en) * | 2013-07-19 | 2013-10-09 | 湖州广源水产养殖有限公司 | High-efficient, intensive and ecological finless ell breeding method |
| CN104542367A (en) * | 2013-10-18 | 2015-04-29 | 湖北生物科技职业学院 | Method for culturing monopterus albus by four square meters of net cage |
| CN104542367B (en) * | 2013-10-18 | 2016-08-31 | 湖北生物科技职业学院 | A kind of method with 4 square metres of small-sized net cage culturing rice field eels |
| CN103621443A (en) * | 2013-11-28 | 2014-03-12 | 长江大学 | Method for breeding female parental finless eels based on intermittent feeding |
| CN104798704A (en) * | 2015-04-09 | 2015-07-29 | 华中农业大学 | Large-scale artificial hatching method of fertilized ovums of rice-field eels |
| CN104823887A (en) * | 2015-04-30 | 2015-08-12 | 董勇 | Directionally induced large-scale rice field eel culture method |
| CN110250054A (en) * | 2019-08-06 | 2019-09-20 | 安徽省农业科学院水产研究所 | A kind of parent culture method promoting Pelteobagrus fulvidraco gonad development |
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