Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus
Non-conventional hormone, Androgenic Steroid (mesterolone) was prepared and incorporated (using ethanol) at various concentration of 0mg, 30mg, 40mg, 50mg, 60mg each in 0.2kg of fish meal. The six levels were replicated 3 times in plastic tanks. The fish meal incorporated with hormone (mesterolone) were fed as first food to 7 -day old fry of Oreochromis niloticus for 28 days after which the tilapia fry were fed on ordinary fishmeal for another 8 weeks. At the 9th and 12th weeks and after feeding with the hormone, the number of survivals and the weights gained were recorded! After the 12week, the males and females were separated using hand-magnifying lens. The economic viability of all male production using non-conventional hormone (mesterolone) was calculated. Hormone fed to O. niloticus was found to have no significant effect (P>0. 05) on the survival and the mean weight gain of the O. niloticus. But the hormone fed had great influence on the female: male ratio i.e. treatment difference was highly significant (P<0.01). Tilapia fry fed with 40mg/0.2kg feed was found to have the largest percentage of males 97% while those fed with 30mg/0.2kg, 50mg/0.2kg, 60mg/0.2kg and 70mg/0.2kg had 51%,91%,86%,89%, and 80% males respectively.
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Format: | conference_item biblioteca |
Language: | English |
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FISON
2008
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Subjects: | Aquaculture, Oreochromis niloticus, Nigeria, Ibadan, freshwater environment, Breeding, Fish culture, Sex hormones, Diets, Sex ratio, Sex reversal, |
Online Access: | http://hdl.handle.net/1834/37977 |
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dig-aquadocs-1834-379772021-07-13T03:14:03Z Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus Oyin, O. Olugbemi, E.V. Ola, A.G. Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal Non-conventional hormone, Androgenic Steroid (mesterolone) was prepared and incorporated (using ethanol) at various concentration of 0mg, 30mg, 40mg, 50mg, 60mg each in 0.2kg of fish meal. The six levels were replicated 3 times in plastic tanks. The fish meal incorporated with hormone (mesterolone) were fed as first food to 7 -day old fry of Oreochromis niloticus for 28 days after which the tilapia fry were fed on ordinary fishmeal for another 8 weeks. At the 9th and 12th weeks and after feeding with the hormone, the number of survivals and the weights gained were recorded! After the 12week, the males and females were separated using hand-magnifying lens. The economic viability of all male production using non-conventional hormone (mesterolone) was calculated. Hormone fed to O. niloticus was found to have no significant effect (P>0. 05) on the survival and the mean weight gain of the O. niloticus. But the hormone fed had great influence on the female: male ratio i.e. treatment difference was highly significant (P<0.01). Tilapia fry fed with 40mg/0.2kg feed was found to have the largest percentage of males 97% while those fed with 30mg/0.2kg, 50mg/0.2kg, 60mg/0.2kg and 70mg/0.2kg had 51%,91%,86%,89%, and 80% males respectively. Includes:- 3 tables.;1 Fig.;15 refs. 2021-06-24T18:09:13Z 2021-06-24T18:09:13Z 2008 conference_item TRUE http://hdl.handle.net/1834/37977 en http://www.fison.org.ng/ application/pdf application/pdf 258 - 263 FISON Lagos, Nigeria http://aquaticcommons.org/id/eprint/23252 19325 2018-03-25 14:35:14 23252 Fisheries Society of Nigeria |
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Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal |
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Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal Oyin, O. Olugbemi, E.V. Ola, A.G. Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
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Non-conventional hormone, Androgenic Steroid (mesterolone) was prepared and incorporated (using ethanol) at various concentration of 0mg, 30mg, 40mg, 50mg, 60mg each in 0.2kg of fish meal. The six levels were replicated 3 times in plastic tanks. The fish meal incorporated with hormone (mesterolone) were fed as first food to 7 -day old fry of Oreochromis niloticus for 28 days after which the tilapia fry were fed on ordinary fishmeal for another 8 weeks. At the 9th and 12th weeks and after feeding with the hormone, the number of survivals and the weights gained were recorded! After the 12week, the males and females were separated using hand-magnifying lens. The economic viability of all male production using non-conventional hormone (mesterolone) was calculated. Hormone fed to O. niloticus was found to have no significant effect (P>0. 05) on the survival and the mean weight gain of the O. niloticus. But the hormone fed had great influence on the female: male ratio i.e. treatment difference was highly significant (P<0.01). Tilapia fry fed with 40mg/0.2kg feed was found to have the largest percentage of males 97% while those fed with 30mg/0.2kg, 50mg/0.2kg, 60mg/0.2kg and 70mg/0.2kg had 51%,91%,86%,89%, and 80% males respectively. |
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conference_item |
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Aquaculture Oreochromis niloticus Nigeria Ibadan freshwater environment Breeding Fish culture Sex hormones Diets Sex ratio Sex reversal |
author |
Oyin, O. Olugbemi, E.V. Ola, A.G. |
author_facet |
Oyin, O. Olugbemi, E.V. Ola, A.G. |
author_sort |
Oyin, O. |
title |
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
title_short |
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
title_full |
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
title_fullStr |
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
title_full_unstemmed |
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus |
title_sort |
production of all male fingerlings through feeding of androgenic steroid (mesterolone) in the diet fed as first food to tilapia oreochromis niloticus |
publisher |
FISON |
publishDate |
2008 |
url |
http://hdl.handle.net/1834/37977 |
work_keys_str_mv |
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_version_ |
1756079697291116544 |