Hormonal sex reversal technique of Oreochromis niloticus larvae in a tank in the Urban Commune of Kankan, Republic of Guinea
Abstract
Hormonal sex - reversal is widely recognized as having significant advantage over both manual sexing and hybridization. The present study carried out in the aquaculture center of Kankan aimed at producing monosex male fry of Oreochromis niloticus in order to increase the yield of this species.
During this study, 95 Oreochromis niloticus broodstock including 21 males and 74 females were paired (spawned) in a spawning tank of 135 m2 surface for 15 days. The respective mean weights of the spawners were 448.6 ±157.7 g for males and 406.7±115.9 g for females. Hormonal treatment was performed on 900 larvae with an average initial weight of 0.028 g from the 10th post fertilization to the 38th day in a tank of one (1) m3. The larvae were fed with 1 kg of imported "Raanan Premium Fish" powdered feed titrated with 40% protein, mixed in a hormonal solution containing 17-α-methyltestosterone and 90% ethanol with respective doses of 100 mg and 500 ml.
At the end of hormonal treatment, 578 fry with a final average weight of 4.5 g were conducted in a pre-pregnancy tank with a surface area of 50 m2 for 30 days and yielded at the end of pre-pregnancy 501 fry with a final average weight of 13 g, a daily growth rate of 0.22 g, a specific growth rate of 1.7%, a survival rate of 64% and a mortality rate of 36%. After sex identification (sexing), the rates of hormonal treatment were 83.33% and 16.66% for males and females, respectively. In conclusion, the popularization of the results of this study could be considered as an alternative for a production of monosex male population in Oreochromis niloticus that will feed the networks of local producers to improve the production of the species throughout the country.
Keywords: Oreochromis niloticus, hormone, sex, larvae and tank.
Keywords:
Oreochromis niloticus, hormone, sex, larvae and tankDOI
https://doi.org/10.22270/jddt.v11i5.4977References
FAO, 2016. La situation des pêches et de l’aquaculture. Contribution à la securité alimentaire et à la nutrition de tous. Rome, Italie 105.p. http//www.org Consulté le 25/09/ 2020 à 23 heures 15 minutes 30 secondes.
FAO, 2011. Analyse Prospective du développement de l’aquaculture : méthode Delphi. FAO document technique sur les pêche et l’aquaculture. N°521, FAO 77p.
APDRA-PDRP-GF (2017). Association Pisciculture de Développement Rural en Afrique-Projet de Développement de la Rizi-Pisciculture en Guinée Forestière. Guide de la pisciculture paysanne en Guinée forestière. Direction Nationale de la Pisciculture, Agence Française de Développement et Union Européenne. P.97.
Ouédraogo, C.R.N. 2009. Inversion hormonale du sexe par la methyltestostérone et l'ethynyleostradiol chez le Tilapia Oreochromis niloticus. Mémoire de Diplôme d'Etudes Approfondies. Université Polytechnique de Bobodioulasso : p.46.
Recensement Général de la Population Humaine 2014.
Khemis, S, Maamri, S. Inversion sexuelle chez Oreochromis niloticus de la Station Nationale de la Recherche et du Développement de la Pêche et de l’Aquaculture (CNRDPA) Hassiben Abdellah, Ouargla. Mémoire de Master Professionnel. Université Kasdi-Merbah Ouargla, Faculté des Sciences de la Nature et de la Vie, Département des Sciences Biologiques. Spécialité : Aquaculture. 2019 ; 34p.
Saar, S.M., Kabrè, A.J.T and Niass, F., Régime alimentaire du mulet jaune (Mugil cephalus, Linneaus, 1758, Mugilidae) dans l’estuaire du fleuve Sénégal. Journal of Biosciences, 2013 ; 71:5663-5672. https://doi.org/10.4314/jab.v71i1.98809
Koné, Y., 2016. Inversion hormonale du sexe par la 17-alpha-methyltestostérone chez le tilapia (Oreochromis niloticus): souche Bouaké Côte d'Ivoire: Memoire de Master- UFRSGE. Universite Nangui Abrogoua Côte d’Ivoire.
Adjanké, A. Technique de production d’alevins et gestion de ferme piscicole. Togo. Coordination Togolaise des Organisations Paysannes et de Producteurs Agricoles (CTOPPA). 2011 ; p.39.
Lazard, J., La pisciculture des tilapias. Cahiers Agricuttures. 2009 ; pp. 171-182. https://doi.org/10.1684/agr.2009.0305
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