CN102578001A - Unisexual fry raising technique for walking catfish - Google Patents

Unisexual fry raising technique for walking catfish Download PDF

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Publication number
CN102578001A
CN102578001A CN2011100010391A CN201110001039A CN102578001A CN 102578001 A CN102578001 A CN 102578001A CN 2011100010391 A CN2011100010391 A CN 2011100010391A CN 201110001039 A CN201110001039 A CN 201110001039A CN 102578001 A CN102578001 A CN 102578001A
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bait
walking
feed
fry
day
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张中国
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Guangxi Yulin Source Of Fish & Anmal Husbandry Co Ltd
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Guangxi Yulin Source Of Fish & Anmal Husbandry Co Ltd
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Priority to CN2011100010391A priority Critical patent/CN102578001A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

Abstract

The invention relates to a unisexual fry raising technique for the walking catfish, which mainly includes: firstly, preparing induction drug contained feed for unisexual fry raising; secondly, breeding the hatched walking catfishes in the wild, and feeding the walking catfishes when the fishes start eating food; and thirdly, feeding the walking catfishes with the prepared induction drug contained feed so as to masculinize the hatched walking catfishes to obtain the sexually stable unisexual walking catfishes. By the technique, masculinization rate of the walking catfishes can reach more than 90%, and the walking catfishes are sexually stable. The unisexual fry raising technique can be used for unisexual breeding of the walking catfish to increase yield and quality of the walking catfish.

Description

The unisexuality seedling growing process of pool cowfish
Affiliated technical field
The present invention relates to the unisexuality seedling growing process of the unisexuality seedling growing process of a kind of aquatic livestock, particularly pool cowfish.
Background technology
In aquaculture, because the economic characters of male and female fish (like growth rate, individual size, maturation age, modes of reproduction, body colour, build etc.) are variant.Male pool cowfish all has a clear superiority at aspects such as growth performance, meat and market values than female pool cowfish.The sex of control fish, the sex of selecting to have the optimum growh performance is carried out monosex cultivation, and is not only very useful to illustrating the machine-processed scheduling theory problem of fish sex differentiation and Sex determination, in aquaculture, also has many-sided practice significance simultaneously.Carry out pool cowfish monosex cultivation, can make it have the optimum growh performance, improve its yield per unit area; Can effectively control its breeding, improve output; Also can make sashimi (raw fish) long fast, individual big, reduce the consumption of reproduction energy, the nutriment of absorption is mainly deposited in muscle, increase edible part, improve meat and value.The sexual hormone induction method of main path of fish sex control, interspecific cross, three series mating technology, artificial gynogenesis and artificial androgenesis etc.At present, the sex control technology is comparatively ripe in the breed of a few fish such as Tilapia mossambica, but in cowfish breed field, the pool, does not still have the unisexuality seedling growing process of a kind of gratifying pool cowfish.There is not reliable unisexuality seedling growing process seriously restricting the fast development that pool cowfish is cultured.
Summary of the invention
The present invention provides a kind of pool technology that the cowfish unisexuality is grown seedlings, and reaches more than 90% through the drug-induced male ratio of pool cowfish that can make, thereby realizes the monosex cultivation of pool cowfish, improves output and the quality of pool cowfish.
The technical scheme major technique that the present invention adopts may further comprise the steps:
(1) contains the preparation of the bait of 17 Alpha-Methyl testosterone 40mg/kg and Letrozole (letrozole) 2mg/kg: in the ratio of every kilogram of bait 40mg17 Alpha-Methyl testosterone, Letrozole 2mg/kg; Earlier two kinds of medicines are dissolved in 95% alcohol; Pour into again in the common artifical compound feed; Stir, dry or dry and process bait feeding.
(2) get local pool cowfish parent population, it is carried out artificial induced spawning, it is laid eggs, hatching.
(3) at 5~10m 2, the depth of water 25~35cm nursery pond in; Water temperature is controlled at 27~29 ℃, opens the aerator oxygenation, the fry after the hatching is put in a suitable place to breed in nursery pond by every square metre 1~1.5 ten thousand tails; After treating the fry opening; Throw something and feed 4~6 time with fairy shrimp nauplius or wheel animalcule every day, and per ten thousand tails bait 100~250g that throws something and feeds every day feeds a week.During this time, change water every day once, each quantity of exchanged water is not more than 1/2.
(4) then, fed continuously 30 days with the bait that contains 17 Alpha-Methyl testosterone 40mg/kg, Letrozole 2mg/kg for preparing, throw something and feed every day 4~6 times, per ten thousand tails bait 300~4000g that throws something and feeds every day increases the bait feeding amount as time passes.During this time, change water every day once, each quantity of exchanged water is not more than 1/2.
(5) can obtain male ratio more than 90%, unisexuality pool cowfish that proterties is stable through top method, carry out the branch fish then, begin to culture.
The invention has the beneficial effects as follows: arrive more than 90% through the drug-induced male ratio of pool cowfish that can make, and proterties is stable, thereby realizes the monosex cultivation of pool cowfish, improve output and the quality of pool cowfish.Method is simple.
Embodiment
The technology that the pool provided by the invention cowfish unisexuality is grown seedlings is implemented to accomplish by following five steps:
(1) preparation of experiment fish: get local pool cowfish parent population, it is carried out artificial induced spawning, it is laid eggs, hatching.
(2) contain the preparation of the bait of 17 Alpha-Methyl testosterones and Letrozole: prepare three kinds of bait: the bait of every kilogram of bait 10,40,80mg17 Alpha-Methyl testosterone, wherein Letrozole all adds by the amount of every kilogram of bait 2mg.Earlier two kinds of medicines are dissolved in 95% alcohol, pour into again in the common artifical compound feed, stir, dry or dry and process bait feeding.
(3) at 5m 2, the depth of water 25~35cm nursery pond in; Water temperature is controlled at 27~29 ℃, opens the aerator oxygenation, the fry that has just hatched is put in a suitable place to breed in nursery pond by every square metre 1~1.5 ten thousand tails; After treating the fry opening; Throw something and feed 4~6 time with the fairy shrimp nauplius every day, by per ten thousand tail 100~250g every day bait feedings, feeds a week.During this time, change water every day once, each quantity of exchanged water is not more than 1/2.
(4) be equipped with in addition 9 nursery ponds and numbering, get the fry after the above-mentioned week of feeding then, put in a suitable place to breed in 9 nursery ponds by every pond 200 tails, and number order and condition in the according to the form below, feed with the bait that contains two kinds of medicines.Throw something and feed every day 5 times,, increase the bait feeding amount as time passes, the equivalent of throwing something and feeding between each pond bait by per ten thousand tail 300~4000g every day bait feedings.During this time, change water every day once, each quantity of exchanged water is not more than 1/2.
Figure BSA00000409044300021
(5) use normal diet again instead and continued to feed 30 days, dissect then,, judge its whether masculine according to the developmental state (ovarian atrophy or disappearance can be judged as male) of sexual gland.Under the contrast different condition (in the bait hormone concentration, feeding contains the time of hormone bait), calculate survival rate and the male ratio of pool cowfish, draw optimum condition.
Experimental result is following:
Figure BSA00000409044300022
Can know that 17 Alpha-Methyl testosterone concentrations are 40mg/kg in the bait, when Letrozole concentration is 2mg/kg, have the highest male ratio by the result, and also have higher survival rate this moment.17 Alpha-Methyl testosterone concentrations are that 40mg/kg, Letrozole concentration are 2mg/kg in the bait, do not have significant difference between the sky array of feeding different.To sum up, can draw pool cowfish masculine optimal conditions is: 17 Alpha-Methyl testosterone concentrations are that 40mg/kg, Letrozole concentration are 2mg/kg in the bait, feed 30 days.

Claims (2)

1. method that pool cowfish unisexuality is grown seedlings, its step and method comprise:
(1) contains the preparation of the bait of 17 Alpha-Methyl testosterone 40mg/kg and Letrozole 2mg/kg.
(2) get local pool cowfish parent population, it is carried out artificial induced spawning, it is laid eggs, hatching.
(3) fry after will hatching is put in a suitable place to breed in nursery pond, treat the fry opening after, feed a week.
(4) then, feed continuously with the bait that contains two kinds of medicines for preparing
(5) can obtain male ratio more than 90%, unisexuality pool cowfish that proterties is stable through top method, carry out the branch fish then, begin to culture.
2. the technology that requires described pool cowfish unisexuality to grow seedlings according to right 1 is characterized in that:
(1) contains the preparation method of the bait of 17 Alpha-Methyl testosterone 40mg/kg and Letrozole 2mg/kg: in the ratio of every kilogram of bait 40mg17 Alpha-Methyl testosterone, Letrozole 2mg/kg; Earlier two kinds of medicines are dissolved in 95% alcohol; Pour into again in the common artifical compound feed; Stir, dry or dry and process bait feeding.Used parent population is a local pool cowfish.
(2) behind the fry hatching put in a suitable place to breed and opening after feeding method: at 5~10m 2, the depth of water 25~35cm nursery pond in, water temperature is controlled at 27~29 ℃, open the aerator oxygenation; With the hatching after fry put in a suitable place to breed in nursery pond by every square metre 1~1.5 ten thousand tails, treat the fry opening after, throw something and feed 4~6 time with fairy shrimp nauplius or wheel animalcule every day; Per ten thousand tails bait 100~250g that throws something and feeds every day feeds a week, during; Change water every day once, each quantity of exchanged water is not more than 1/2.
(3) feed and contain hormone bait method: then; Fed continuously 30 days with the bait that contains 17 Alpha-Methyl testosterone 40mg/kg, Letrozole 2mg/kg for preparing, throw something and feed every day 4~6 times, per ten thousand tails bait 300~4000g that throws something and feeds every day; Increase the bait feeding amount as time passes; During this time, change water every day once, each quantity of exchanged water is not more than 1/2.
(4) can obtain male ratio more than 90%, unisexuality pool cowfish that proterties is stable through top method.
CN2011100010391A 2011-01-05 2011-01-05 Unisexual fry raising technique for walking catfish Pending CN102578001A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102783445A (en) * 2012-08-31 2012-11-21 北京卧佛山庄养殖有限公司 Method for breeding full-feminization rainbow trout
CN105876107A (en) * 2014-10-31 2016-08-24 陈海林 Feed made of chicken testis
CN106069948A (en) * 2016-07-15 2016-11-09 广东海洋大学 A kind of method improving betta splendens male ratio
CN106172140A (en) * 2016-08-10 2016-12-07 武汉百瑞生物技术有限公司 The method that a kind of Pelteobagrus fulvidraco masculine induction produces XX ♂ puppet milter
CN106721490A (en) * 2015-11-20 2017-05-31 陈海林 A kind of pool cowfish breeding feed and preparation method
CN106721521A (en) * 2016-11-25 2017-05-31 淮阴师范学院 Improve the feed and its preparation and application of ussuriensis male ratio
CN106818547A (en) * 2016-12-23 2017-06-13 浙江省淡水水产研究所 A kind of processing method for sticking up mouth Culter pseudo-milters
CN114287367A (en) * 2022-01-08 2022-04-08 中国科学院水生生物研究所 Cultivation method for artificially inducing finless eels to directly directionally develop into males

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102783445A (en) * 2012-08-31 2012-11-21 北京卧佛山庄养殖有限公司 Method for breeding full-feminization rainbow trout
CN105876107A (en) * 2014-10-31 2016-08-24 陈海林 Feed made of chicken testis
CN106721490A (en) * 2015-11-20 2017-05-31 陈海林 A kind of pool cowfish breeding feed and preparation method
CN106069948A (en) * 2016-07-15 2016-11-09 广东海洋大学 A kind of method improving betta splendens male ratio
CN106172140A (en) * 2016-08-10 2016-12-07 武汉百瑞生物技术有限公司 The method that a kind of Pelteobagrus fulvidraco masculine induction produces XX ♂ puppet milter
CN106721521A (en) * 2016-11-25 2017-05-31 淮阴师范学院 Improve the feed and its preparation and application of ussuriensis male ratio
CN106818547A (en) * 2016-12-23 2017-06-13 浙江省淡水水产研究所 A kind of processing method for sticking up mouth Culter pseudo-milters
CN114287367A (en) * 2022-01-08 2022-04-08 中国科学院水生生物研究所 Cultivation method for artificially inducing finless eels to directly directionally develop into males
CN114287367B (en) * 2022-01-08 2023-02-28 中国科学院水生生物研究所 Cultivation method for artificially inducing finless eels to directly directionally develop into males

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Application publication date: 20120718