CN103416330A - Cultivation method for keeping female ricefield eel conversion efficiency - Google Patents
Cultivation method for keeping female ricefield eel conversion efficiency Download PDFInfo
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- CN103416330A CN103416330A CN201310235026XA CN201310235026A CN103416330A CN 103416330 A CN103416330 A CN 103416330A CN 201310235026X A CN201310235026X A CN 201310235026XA CN 201310235026 A CN201310235026 A CN 201310235026A CN 103416330 A CN103416330 A CN 103416330A
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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
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Abstract
The invention belongs to the technical field of aquaculture and particularly relates to a cultivation method for keeping female ricefield eel conversion efficiency. Ricefield eels are all female within one year after born, ricefield eels which are two years old or over two years old can gradually convert into male and have special sex reversal. In the prior art, the female ricefield eels are small and the fish brooding amount is small, which becomes one of key factors in restricting fry breeding of the ricefield eels. According to the cultivation method, the appropriate cultivation environment is selected, a female ricefield eel source is selected reasonably, an effective density of released fish is implemented, the content of protein in feed is enhanced properly, scientific feeding, strict management and timely reinforced cultivation and the like are performed; after regulation for one year, the female ricefield eel retention rate reaches 95%, the individual fish brooding amount is improved by over one time averagely, and the number of fish brooding amount of the individual female ricefield eel one year old is improved from 250 to 560 on the average after cultivation. The cultivation method solves the bottleneck problem of ricefield eel fry breeding and has extremely good implementation, development and application prospects.
Description
Technical field
The invention belongs to technical field of aquaculture, relevant with the seed breeding technology in aquaculture, the present invention is specifically related to a kind of breeding method that keeps the female eel transformation efficiency of swamp eel.
Background technology
Swamp eel has become one of important aquatic products of the domestic and foreign exchange earning of China, because its market demand and price constantly rise, stimulates people to excessively capture aggravation, causes wild resource to be on the verge of exhaustion, and therefore, wild seed fundamentally can't meet the demand of swamp eel industry.As can be seen here, the artificial seed becomes the bottleneck problem of restriction swamp eel industry.Again because swamp eel has special sex reversal phenomenon, 2 ages and progressively change into malely more than 2 ages, therefore, female individuals is little, and fish brood amount is few, becomes one of key factor of restriction seed breeding.So, must the female sex reversal phenomenon of regulation and control, thus keep the female eel transformation efficiency of swamp eel, for the industrialized development of swamp eel provides technical support.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of breeding method that keeps the female eel conversion ratio of swamp eel is provided, keep the percentage that in the conversion of swamp eel property, female eel transforms, method of the present invention comprises the suitableeest nurturing an environment of selection, the female eel of choose reasonable source, reasonable implementation breeding density, in suitable raising feed protein content, science feed, strict control and the method such as reinforced cultivating in time, obtain the female parent of high fish brood amount in enormous quantities, the demand of breeding to meet the artificial seed.
The present invention is achieved through the following technical solutions:
A kind of breeding method that keeps the female eel conversion ratio of swamp eel, its step comprises:
1) water quality of cultivating pool and cultivation: select the cultivating pool of area 3300-13320 square metre (5-20 mu, every mu by 666 square metres of calculating), keep depth of water 1.5-1.8m, water quality is well pollution-free;
2) clean up the pond and sterilize: by quicklime 120kg dry method, clean up the pond for every 666 square metres, after 1 week, the new water of filling, keep depth of water 1.5-1.8m;
3) without native net cage setting: at pond waters, net cage is set at the middle and upper levels, in case, without soil, cage size is 3m * 2m * 1.2m, of every centimetre of 7 purpose polythene net sheets, makes, and the net cage setting position is 0.5m on the water surface, and underwater 0.7m, fix with wood; The net cage lid is not set;
4) the net cage pasture and water are transplanted: net cage starts arrange 7 days in pond after to transplant that to perch nest be the water peanut plant, and the pasture and water area accounts for 75% of net cage area;
5) female eel source: artificial propagation 1 age female eel seed;
6) female eel is selected: select annual April body weight 25g, anosis, bouncing 1 age female eel cultivated;
7) breeding density: before putting in a suitable place to breed, by the povidone iodine of 15ppm, sterilize 20 minutes, female eel breeding density is 2kg/m
2
8) dietary protein level: the content of manufactured feed protein is 46%;
9) feedstuff feeding: after artificial seed's inlet, the earthworm of throwing something and feeding the same day, feeding volume is 1% of female eel body weight, every case is established 2 feeding points, within the 3rd day, increase fish gruel and earthworm, what their feeding volume was respectively female eel body weight starts to increase in earthworm and fish gruel the expanded pellet feed that protein content is 46% in 0.5% and 1% 4th days, the feedstuff feeding amount is 0.25% of female eel body weight, so far after the feedstuff feeding amount progressively increase to female eel body weight 0.75% after, depending on the seed actual conditions of ingesting, by earthworm, fish gruel and expanded pellet feed are pressed respectively the 1-2% of female eel body weight, 1-2% and 1-1.5% throw something and feed, throw something and feed once at dusk every day,
10) aquaculture management: during throwing something and feeding, with splash cultivating pool 1 time of quicklime water, consumption is every cubic metre of water body 0.015kg per month; After entering by the end of September, the total amount of above-mentioned Three feed is no more than 3.5% of female eel body weight; Stop by the end of October the feed of throwing something and feeding;
11) survive the winter: enter November, the eel seedling is survived the winter in former cultivation net cage, the pond depth of water remains unchanged, and at least is stabilized in 1.5m.If freeze in pond and in net cage, the punching oxygenation of should opening ice, keep the female eel of swamp eel normally to survive the winter in net cage;
12) reinforced cultivating after the beginning of spring: at the beginning of the beginning Feeding time is chosen in by the end of March or 4 months next year, as long as water temperature rises to 18 ℃, just start the above-mentioned feed of throwing something and feeding;
13) select to start the feed of throwing something and feeding: in 5 days after starting to throw something and feed, by the 0.5-1% of the female eel body weight earthworm of throwing something and feeding, the 6th day, feed is adjusted into to earthworm, fish gruel and expanded pellet feed, its ratio is respectively 0.5%, 0.5% and 0.25% of female eel body weight;
14) proceed to normally and throw something and feed: from the 7th day, proceed to normally and throw something and feed; Depending on the female eel concrete condition of ingesting, 1-2%, 1-2% and 1-1.5% that earthworm, fish gruel and expanded pellet feed are progressively increased to respectively by female eel body weight throw something and feed, and still in every day, at dusk, throw something and feed once.
Embodiment
Below in conjunction with embodiment, further the present invention is elaborated, but the present invention does not limit this mode.
Embodiment 1:
1. pond is without native raising in cage environment
1) pond and water quality: select area 3300-13320 square metre of (5-20 mu, every mu by 666 square metres of calculating) cultivating pool, keep depth of water 1.5-1.8m, water quality is well pollution-free (referring to: pollution-free food aquiculture fresh water water quality, standard No.: NY5051-2001, download address: the public platform of sci-tech innovation of Zhejiang Province's standard information and quality safety: http://www.spsp.gov.cn/Page/QT/2001/NY%205051-2001.shtml).
2) clean up the pond and sterilize: by quicklime 120kg dry method, clean up the pond for every 666 square metres, after 1 week, the new water of filling, keep depth of water 1.5-1.8m.
3) without native net cage setting: at pond waters, net cage is set at the middle and upper levels, nothing soil in case.Cage size is 3m * 2m * 1.2m, of every centimetre of 7 purpose polythene net sheets, makes, and with wood, fixes.Net cage is 0.5m on the water surface, underwater 0.7m.The net cage uncovered.
4) the net cage pasture and water are transplanted: net cage starts arrange 7 days in pond after to transplant perches nest-water peanut, and the pasture and water area accounts for 75% of net cage area.
2. female eel source and selection
1) female eel source: for artificial propagation 1 age female eel seed.
2) female eel is selected: select annual April body weight 25g, anosis, bouncing 1 age female eel cultivated.
3) breeding density: before putting in a suitable place to breed, the povidone iodine sterilization water body of use 15ppm 20 minutes, breeding density is 2kg/m
2.
Forage protein content with throw something and feed
1) forage protein content: expanded pellet feed (Xiamen of Fujian Province Jia Sheng feed corporation,Ltd) protein content is 46%.
2) throw something and feed: after artificial seed's inlet, the earthworm of throwing something and feeding the same day, feeding volume is 1% of female eel body weight, every case is established 2 feeding points, within the 3rd day, increase fish gruel and earthworm, what their feeding volume was respectively female eel body weight starts to increase in earthworm and fish gruel the expanded pellet feed that protein content is 46% in 0.5% and 1% 4th days, the expanded pellet feed feeding volume is 0.25% of female eel body weight, after forage volume progressively increases to 0.75%, depending on the seed actual conditions of ingesting, earthworm, the fish gruel, expanded pellet feed is pressed respectively the 1-2% of female eel body weight, 1-2% and 1-1.5% throw something and feed, throw something and feed once at dusk every day.
4. manage and survive the winter
1) management: during throwing something and feeding, by every cubic metre of water body, with the quicklime water of 0.015kg, splash 1 time per month, after entering by the end of September, three kinds of earthworms, fish total amounts rotten, expanded pellet feed are no more than 3.5% of female eel body weight.Stop by the end of October throwing something and feeding.
2) survive the winter: enter November, the female eel of swamp eel is survived the winter in former cultivation net cage, the pond depth of water remains unchanged, and at least is stabilized in 1.5m.If freeze in pond and in net cage, the punching oxygenation of should opening ice, keep the female eel of swamp eel normally to survive the winter in net cage.
5. the reinforced cultivating after the beginning of spring
1) select to start Feeding time: at the beginning of by the end of March or 4 months next year, as long as water temperature rises to 18 ℃, just start the relevant feed of throwing something and feeding.
2) start to throw something and feed time and the consumption of feed: in 5 days after starting to throw something and feed, by the 0.5-1% of the female eel body weight earthworm of throwing something and feeding; The 6th day, feed is adjusted into to earthworm, fish gruel and expanded pellet feed, its ratio is respectively 0.5%, 0.5% and 0.25% of female eel body weight.
3) proceed to time and the consumption of normally throwing something and feeding: from the 7th day, proceed to normally and throw something and feed.Depending on the female eel concrete condition of ingesting, 1-2%, 1-2% and 1-1.5% that earthworm, fish gruel and expanded pellet feed progressively increase to respectively by female eel body weight throw something and feed, and still in every day, at dusk, throw something and feed once.
With this method cultivate to next year by the end of April or the first tenday period of a month in May, the body weight of female eel can reach 150-200g, female eel conservation rate reaches 95%, fish brood amount has on average improved more than 1 times, by 1 age average 250 bring up to cultivate after 560 of average out to.Now can be used as the female close eel of high-quality and ripe male eel mate and oviposit fertilization.
Claims (1)
1. a breeding method that keeps the female eel conversion ratio of swamp eel is characterized in that the following step:
1) water quality of cultivating pool and cultivation: select the cultivating pool of area 3300-13320 square metre, keep depth of water 1.5-1.8m, water quality is well pollution-free;
2) clean up the pond and sterilize: with quicklime 120kg, clean up the pond for every 666 square metres, after 1 week, the new water of filling, keep depth of water 1.5-1.8m;
3) without native net cage setting: at pond waters, net cage is set at the middle and upper levels, in case, without soil, cage size is 3m * 2m * 1.2m, makes of every centimetre of 7 purpose polythene net sheets, and fixes with wood; Net cage position 0.5m on the water surface, underwater 0.7m, do not arrange the net cage lid;
4) the net cage pasture and water are transplanted: net cage starts arrange 7 days in pond after to transplant that to perch nest be the water peanut plant, and water peanut plant area accounts for 75% of net cage area;
5) female eel source: artificial propagation 1 age female eel seed;
6) female eel is selected: select annual April body weight 25g, anosis, bouncing 1 age female eel cultivated;
7) breeding density: before putting in a suitable place to breed, by the povidone iodine of 15ppm, sterilize 20 minutes, female eel breeding density is 2kg/m
2
8) dietary protein level: the content of manufactured feed protein is 46%;
9) feedstuff feeding: after artificial seed's inlet, the earthworm of throwing something and feeding the same day, feeding volume is 1% of female eel body weight, every case is established 2 feeding points, within the 3rd day, increase fish gruel and earthworm, its feeding volume is respectively 0.5% and 1% of female eel body weight, within the 4th day, start to increase the expanded pellet feed that protein content is 46% in earthworm and fish gruel, the feedstuff feeding amount is 0.25% of female eel body weight, so far after the feedstuff feeding amount progressively increase to female eel body weight 0.75% after, depending on the seed actual conditions of ingesting, by earthworm, fish gruel and expanded pellet feed are pressed respectively the 1-2% of female eel body weight, 1-2% and 1-1.5% throw something and feed, throw something and feed once at dusk every day,
10) aquaculture management: during throwing something and feeding, with splash cultivating pool 1 time of quicklime water, consumption is every cubic metre of water body 0.015kg per month; After entering by the end of September, the total amount of above-mentioned Three feed is no more than 3.5% of female eel body weight; Stop by the end of October the feed of throwing something and feeding;
11) survive the winter: enter November, the eel seedling is survived the winter in former cultivation net cage, the pond depth of water remains unchanged, and at least is stabilized in 1.5m; If freeze in pond and in net cage, the punching oxygenation of should opening ice, keep the female eel of swamp eel normally to survive the winter in net cage;
12) reinforced cultivating after the beginning of spring: at the beginning of the beginning Feeding time is chosen in by the end of March or 4 months next year, as long as water temperature rises to 18 ℃, just start the above-mentioned feed of throwing something and feeding;
13) select to start the feed of throwing something and feeding: in 5 days after starting to throw something and feed, by the 0.5-1% of the female eel body weight earthworm of throwing something and feeding, the 6th day, feed is adjusted into to earthworm, fish gruel and expanded pellet feed, its ratio is respectively 0.5%, 0.5% and 0.25% of female eel body weight;
14) proceed to normally and throw something and feed: from the 7th day, proceed to normally and throw something and feed, depending on the female eel concrete condition of ingesting, 1-2%, the 1-2% and the 1-1.5% that earthworm, fish gruel and expanded pellet feed are progressively increased to respectively to female eel body weight throw something and feed, and in every day, at dusk, throw something and feed once.
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| CN201310235026.XA CN103416330B (en) | 2013-06-13 | 2013-06-13 | Cultivation method for keeping female ricefield eel conversion efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104365510A (en) * | 2014-09-12 | 2015-02-25 | 华中农业大学 | Regulation and control method for improving efficiency of converting female ricefield eel into male ricefield eel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103711A (en) * | 2007-07-30 | 2008-01-16 | 华中农业大学 | Artificial regulatory method for increasing female rice field eel fecundity |
| CN103004649A (en) * | 2011-09-23 | 2013-04-03 | 长江大学 | Ecology regulation and control method for delaying sex reversal time of eels |
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2013
- 2013-06-13 CN CN201310235026.XA patent/CN103416330B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103711A (en) * | 2007-07-30 | 2008-01-16 | 华中农业大学 | Artificial regulatory method for increasing female rice field eel fecundity |
| CN103004649A (en) * | 2011-09-23 | 2013-04-03 | 长江大学 | Ecology regulation and control method for delaying sex reversal time of eels |
Non-Patent Citations (3)
| Title |
|---|
| 曹克驹: "《名特水产动物养殖学》", 31 January 2004, 中国农业出版社 * |
| 谢岳成: "庭院网箱养鳝把三关", 《农村实用科技信息》 * |
| 邴旭文等: "黄鳝的饵料驯化与网箱养殖技术", 《渔业现代化》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104365510A (en) * | 2014-09-12 | 2015-02-25 | 华中农业大学 | Regulation and control method for improving efficiency of converting female ricefield eel into male ricefield eel |
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