CN103004649A - Ecology regulation and control method for delaying sex reversal time of eels - Google Patents
Ecology regulation and control method for delaying sex reversal time of eels Download PDFInfo
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- CN103004649A CN103004649A CN2011102847216A CN201110284721A CN103004649A CN 103004649 A CN103004649 A CN 103004649A CN 2011102847216 A CN2011102847216 A CN 2011102847216A CN 201110284721 A CN201110284721 A CN 201110284721A CN 103004649 A CN103004649 A CN 103004649A
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- yellow eel
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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 an ecology regulation and control method for delaying the sex reversal time of eels. The ecology regulation and control method for delaying the sex reversal time of the eels is characterized in that under an ecology imitation condition, young eels with the same specification are massively produced, and moreover, with the adoption of a pond net cage breeding method, the young eels obtained in the same year are bred and overwinter to grow into 30-40g 1-full-age eels; and after the overwintering, the 30-40g 1-full-age eels are fed for one year with high protein nutrients at a high density in a pond net cage, wherein the feeding density is 50-80 eels per square meter and the feed protein content is 40% to 42%. Through the method, 2-winter-age female eel parents with great brood amount and an individual specification of more than 100g can be produced; the colony reproductive capacity of the female eel parents can be improved by 200% to 300%; the quantity of the produced young eels is correspondingly improved by 200% to 300%; and therefore, the demand on the large-scale breeding of the young eels can be met.
Description
Technical field:
The present invention relates to a kind of ecological regulate and control method of postponing the yellow eel sex reversal time, belong to the fishery science applied technical field.
Background technology:
Yellow eel is that China cultivates very rapidly one of famous-brand and high-quality fish of fresh water of development in recent years, and it mainly cultivates the provinces such as Hubei that the producing region is dispersed throughout the middle and lower reach of Yangtze River, Hunan, Anhui, Jiangxi, Zhejiang; Eel cultivation has become the leading industry of these regional culture fisheries.
But at present; the required seed of eel cultivation is mainly take wild resource as main; wild yellow eel seed all can not be satisfied scale and the industrialization needs of eel cultivation at aspects such as the time of putting in a suitable place to breed, quality and quantity and sources; therefore, the artificial batch production of yellow eel seed is to carry out the inevitable demand that eel is supported in scale.Yet, yellow eel is the existence transition phenomenon in its history of life, be that yellow eel is female for individual less function before the first time, sexual maturity was laid eggs, sex reversal namely occurs after laying eggs, progressively become individual larger function male, finally cause the problems such as the individuality of female eel parent in the artificial propagation process and the little and female male parent Individual Size of fish brood amount be inharmonious, seed breeding quantity and scale are restricted.Therefore, obtaining individual female eel parents large, that quantity is many is the key that the yellow eel seedling is produced in batches.
Summary of the invention:
In order to overcome the deficiencies in the prior art; the object of the present invention is to provide a kind of ecological regulate and control method of postponing the yellow eel sex reversal time; can obtain the consistent female parent of large individuality of a large amount of specifications, colony's fertility of the female parent of Effective Raise yellow eel satisfies the seedling requirement that eel is supported in scale.
The present invention realizes above-mentioned purpose by following technical solution.
(1), artificial breeding obtains to grow 1 consistent full age yellow eel:
Obtain in batches the yellow eel seedling that artificial breeding brings out by the net cage mating system 6～July then, change the yellow eel seedling over to pond net box and cultivate, to 6～July of next year, obtain to grow consistent individual specification the 1 full age yellow eel of 30～40g.
(2), keeping of 1 yellow eel ovarian function in age in winter:
The 1 full age yellow eel of individual weight 30～40g begins egg reproduction annual 7～August, and sex reversal occurs subsequently; Do not lay eggs and sex reversal for suppressing yellow eel, 1 full age yellow eel under the Ecology condition, is carried out the cultivation of high density and high-protein nutrient; Namely in the pond, arrange net cage, net cage size 2～4m
2, the floating water peanut of planting in the net cage, floating area of planting water peanut is 70%～80% of net cage area; Stocking size is the 1 full age yellow eel of 30～40g in the net cage, and density is 50～80 tails/m
2During the cultivation, the protein content of throwing something and feeding every day is at 40%～42% high protein manufactured feed and the mixture of water earthworm, and the part by weight of manufactured feed and water earthworm is: manufactured feed: water earthworm=1: 2; Day feeding volume is 8%～10% of yellow eel body weight.
(3), yellow eel survives the winter:
Then March in mid-November to next year, stop to throw something and feed, yellow eel stops to ingest and begins to survive the winter; Survive the winter and in fish culture net cage, carry out, will add water peanut in the few net cage of pasture and water and guarantee the normal hibernation of yellow eel; Overwintering period does not stir net cage in order to avoid the agitation yellow eel.
(4), keeping of 2 yellow eel ovarian functions in age in winter:
In April in next year, water temperature arrives more than 15 ℃, continues when yellow eel begins to ingest to restart to throw something and feed in former net cage; The feed of throwing something and feeding is animal living feed earthworm or water earthworm, and a day feeding volume is 8%～10% of yellow eel body weight, until before changing yellow eel over to the net cage of laying eggs the mid-May of throwing something and feeding.
During whole cultivation, behind the feed of throwing something and feeding every day, second day is in time collected and is dealt carefully with residual bait in case polluted water; Refresh the water periodically weekly, to keep good water quality and ecotope; Be that the povidone iodine of 2mg/L is regularly sterilized with concentration weekly.
The present invention has following beneficial effect compared with prior art:
1, yellow eel parent's the sex reversal time can postpone more than 12 months, and ratio of female is 95%～100%; Can obtain in batches the large individuality female parent of specification more than 100g.
2, colony's fertility of female yellow eel parent can improve 200%～300%, the corresponding raising 200%～300% of seed quantity, Effective Raise colony's fertility of the female parent of yellow eel, can satisfy the seedling requirement that eel is supported in scale.
Embodiment:
Implement the present invention, take Jianghan Plain as example, can carry out according to the following steps:
(1), artificial breeding obtains to grow 1 consistent full age yellow eel:
Be that 100cm * 150cm * 100cm net cage is put into the paddy field with specification, spread the earth with 10～15cm in the net cage bottom, then water filling enters the paddy field, enters the water yield and exceeds with the water surface that earth face 8～10cm is advisable in the net cage; Floatingly in each net cage plant several strain weter hyacinths as the parent nests, mate and oviposit, incubating oosperm are emerged place.In net cage, put into sexually matured female, each 2 tail of male parent mid-May then, about artificial culture 15 days, be allowed to condition at natural spawning in 6～July, fertilization and hatching, emerge rear batch collection yellow eel seedling and change pond net box over to and cultivate to 6～July of next year obtains to grow consistent individual specification the 1 full age yellow eel of 30～40g.
(2), keeping of 1 yellow eel ovarian function in age in winter:
The 1 full age yellow eel of individual weight 30～40g begins egg reproduction annual 7～August, and sex reversal occurs subsequently; Do not lay eggs and sex reversal for suppressing yellow eel, 1 full age yellow eel under the Ecology condition, is carried out the cultivation of high density and high-protein nutrient; Namely in the pond, arrange net cage, net cage size 2～4m
2, the floating water peanut of planting in the net cage, floating area of planting water peanut is 70%～80% of net cage area; Stocking size is the 1 full age yellow eel of 30～40g in the net cage, and density is 50～80 tails/m
2During the cultivation, the protein content of throwing something and feeding every day is at 40%～42% high protein manufactured feed and the mixture of water earthworm, and the part by weight of manufactured feed and water earthworm is: manufactured feed: water earthworm=1: 2; Day feeding volume is 8%～10% of yellow eel body weight.
(3), yellow eel survives the winter:
Then March in mid-November to next year, stop to throw something and feed, yellow eel stops to ingest and begins to survive the winter; Survive the winter and in fish culture net cage, carry out, will add water peanut in the few net cage of pasture and water and guarantee the normal hibernation of yellow eel; Overwintering period does not stir net cage in order to avoid the agitation yellow eel.
(4), keeping of 2 yellow eel ovarian functions in age in winter:
In April in next year, water temperature arrives more than 15 ℃, continues when yellow eel begins to ingest to restart to throw something and feed in former net cage; The feed of throwing something and feeding is animal living feed earthworm or water earthworm, and a day feeding volume is 8%～10% of yellow eel body weight, until before changing yellow eel over to the net cage of laying eggs the mid-May of throwing something and feeding.
During whole cultivation, behind the feed of throwing something and feeding every day, second day is in time collected and is dealt carefully with residual bait in case polluted water; Refresh the water periodically weekly, to keep good water quality and ecotope; Regularly sterilize with the povidone iodine of concentration 2mg/L weekly.
Claims (5)
1. ecological regulate and control method of postponing the yellow eel sex reversal time is characterized in that may further comprise the steps:
(1), artificial breeding obtains to grow 1 consistent full age yellow eel:
Obtain the yellow eel seedling that artificial breeding brings out in batches by the net cage mating system 6～July then, change the yellow eel seedling over to pond net box and cultivate to 6～July of next year, obtain individual specification the 1 full age yellow eel of 30～40g;
(2), keeping of 1 yellow eel ovarian function in age in winter:
1 full age yellow eel under the Ecology condition, is carried out the cultivation of high density and high-protein nutrient; Namely in the pond, arrange net cage, net cage size 2～4m
2, the floating water peanut of planting in the net cage, stocking size is the 1 full age yellow eel of 30～40g in the net cage, density is 50～80 tails/m
2During the cultivation, the mixture of throw something and feed every day high protein manufactured feed and water earthworm, a day feeding volume is 8%～10% of yellow eel body weight;
(3), yellow eel survives the winter:
Then March in mid-November to next year, stop to throw something and feed, yellow eel stops to ingest and begins to survive the winter; Survive the winter and in fish culture net cage, carry out, will add water peanut in the few net cage of pasture and water and guarantee the normal hibernation of yellow eel; Overwintering period does not stir net cage in order to avoid the agitation yellow eel;
(4), keeping of 2 yellow eel ovarian functions in age in winter:
In April in next year, water temperature arrives more than 15 ℃, continues when yellow eel begins to ingest to restart to throw something and feed in former net cage; The feed of throwing something and feeding is animal living feed earthworm or water earthworm, and a day feeding volume is 8%～10% of yellow eel body weight, until before changing yellow eel over to the net cage of laying eggs the mid-May of throwing something and feeding.
2. a kind of ecological regulate and control method of postponing the yellow eel sex reversal time according to claim 1 is characterized in that floating area of planting water peanut is 70%～80% of net cage area.
3. a kind of ecological regulate and control method of postponing the yellow eel sex reversal time according to claim 2, throw something and feed protein content at 40%～42% high protein manufactured feed and the mixture of water earthworm every day during it is characterized in that cultivating.
4. a kind of ecological regulate and control method of postponing the yellow eel sex reversal time according to claim 3 is characterized in that the part by weight of manufactured feed and water earthworm is: manufactured feed: water earthworm=1: 2.
5. a kind of ecological regulate and control method of postponing the yellow eel sex reversal time according to claim 4 is characterized in that during whole cultivation, and behind the feed of throwing something and feeding every day, second day is in time collected and dealt carefully with residual bait in case polluted water; Refresh the water periodically weekly, to keep good water quality and ecotope; Regularly sterilize with the povidone iodine of concentration 2mg/L weekly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102847216A CN103004649A (en) | 2011-09-23 | 2011-09-23 | Ecology regulation and control method for delaying sex reversal time of eels |
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| CN2011102847216A CN103004649A (en) | 2011-09-23 | 2011-09-23 | Ecology regulation and control method for delaying sex reversal time of eels |
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| CN103004649A true CN103004649A (en) | 2013-04-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103416330A (en) * | 2013-06-13 | 2013-12-04 | 华中农业大学 | Cultivation method for keeping female ricefield eel conversion efficiency |
| CN103621443A (en) * | 2013-11-28 | 2014-03-12 | 长江大学 | Method for breeding female parental finless eels based on intermittent feeding |
| CN104067961A (en) * | 2014-06-07 | 2014-10-01 | 长江大学 | Directional breeding method of female parents of finless eel |
| CN104273058A (en) * | 2013-07-12 | 2015-01-14 | 长江大学 | Method for directionally breeding finless eel male parents |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101933469A (en) * | 2009-08-14 | 2011-01-05 | 长江大学 | Method for artificial mass propagation of rice field eel seedlings |
| CN101933471A (en) * | 2009-08-07 | 2011-01-05 | 长江大学 | Method for delaying sex reversal of finless eels |
-
2011
- 2011-09-23 CN CN2011102847216A patent/CN103004649A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101933471A (en) * | 2009-08-07 | 2011-01-05 | 长江大学 | Method for delaying sex reversal of finless eels |
| CN101933469A (en) * | 2009-08-14 | 2011-01-05 | 长江大学 | Method for artificial mass propagation of rice field eel seedlings |
Non-Patent Citations (3)
| Title |
|---|
| 储张杰: "黄鳝性逆转调控途径的研究", 《中国博士学位论文全文数据库农业科技辑》 * |
| 杨代勤等: "黄鳝性转变与体重、年龄的关系", 《长江大学学报(自然科学版)农学卷》 * |
| 柯玉清等: "不同饲料对黄鳝生长和肌肉营养组成的影响", 《长江大学学报(自然科学版)农学卷》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103416330A (en) * | 2013-06-13 | 2013-12-04 | 华中农业大学 | Cultivation method for keeping female ricefield eel conversion efficiency |
| CN104273058A (en) * | 2013-07-12 | 2015-01-14 | 长江大学 | Method for directionally breeding finless eel male parents |
| CN103621443A (en) * | 2013-11-28 | 2014-03-12 | 长江大学 | Method for breeding female parental finless eels based on intermittent feeding |
| CN104067961A (en) * | 2014-06-07 | 2014-10-01 | 长江大学 | Directional breeding method of female parents of finless eel |
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Application publication date: 20130403 |