Comparative study of reproduction cycle of mangrove oyster (Crassostrea gasar) of the lagoons Ebrie and Aby (Côte d’Ivoire)
Paper Details
Comparative study of reproduction cycle of mangrove oyster (Crassostrea gasar) of the lagoons Ebrie and Aby (Côte d’Ivoire)
Abstract
This study aims to give the bases of an efficient management of oyster stocks of the lagoons of the Ivory Coast and further bases of oyster-farming. It characterizes the reproduction cycle of mangrove oyster Crassostrea gasar in two lagoons of Côte d’Ivoire. The Ebrié lagoon; on the level of Grand-Bassam and Azito and the Aby lagoon; on the level of Assinie. Thus, a monthly sampling of 30 oysters per site for 12 months (October 2015 at September 2016) has been made. For each oyster, the linear and ponderal parameters were determined. In addition, the gonad of each oyster was extracted and subjected to a histological study. The results showed that C. gasar has a cycle of reproduction made up of five (5) stages sexual maturity. The sex-ratio is in favour of the females with respectively the ratio (male/female) of 1:2.9 ratios in Assinie, 1:4 in Grand-Bassam and 1:2.6 in Azito. It was noted that C. gasar has a continuous reproduction. However, stages III and IV were more present during the small rainy season (SRS) and the small dry season (SDS) at the level of the sites of Assinie and Grand-Bassam. It is during these two seasons that the gonadosomatic index and the condition factor had its greater values. As for the site of Azito, it recorded constancy in the evolution of gonadosomatic index and the condition factor. At the end of this study, it would be interesting to consider the culture of the mangrove oysters (C. gasar) in an environment controlled to ensure the perennity.
Butler PA. 1949. Gametogenesis in the oyster under conditions of depressed salinity. The Biological Bulletin, 96(3), 263-269. PMid: 18153114 http://dx.doi.org/10.2307/1538361.
Christensen V, Pauly D. 1997.Placing fisheries resources in their ecosystem context. EC Fisheries Cooperation Bulletin 10(2), 9-11.
Dioh BC. 1976.L’ostreiculture au Sénégal: Thèse de Doctorat Vétérinaire; Faculté de Médecine et de Pharmacie de Dakar, 111 p.
Galvão MSN, Pereira OM, Machado IC, Henrique MB. 2000. Aspectosreprodutivos da ostra Crassostrea brasiliana de manguezais do estuário de Cananéia, SP (25°S; 48°W). Boletim do Instituto de Pesca, 26(2), 147-162.
Gomes C, Silva FC, Lopes GR, Melo CMR.2014.The reproductive cycle of the oyster Crassostrea gasar. Brazilian Journal of Biology, 74(4), 967-976. http://dx.doi.org/10.1590/1519-6984.04912
Guo X, Hedgecock D, Hershberger WK, Cooper K, Allen SK. 1998. Genetic. Determinants of protandric sex in the Pacific oyster, Crassostrea gigas. Evolution 52, 394-402.
Kartas F, Quignard JP. 1984. La fécondité des Poissons Téléostéens. Masson. Ed., Paris, 117 p.
Lango-Reynoso F. 1999. Détermination de la sexualité chez l‘huître creuse Crassostrea gigas (Thunberg, 1793). Thèse de Doctorat, Université de Bretagne Occidentale, Brest, 139 p.
Lawal-Are AO, Owolabi AT. 2012. Comparative Biology of the Prawns Macrobrachium macrobrachion (Herklots) and Macrobrachium vollenhovenii (Herklots) From Two Interconnecting Fresh/Brackish Water Lagoons in South-West Nigeria. J Marine Sci Res Dev 2, 108. http://dx.doi.org/10.4172/2155-9910.1000108
Lenz T, Boehs G. 2011.Cicloreproductivodelostión de manglar Crassostrea rhizophorae (Bivalvia: Ostreidae) en la Bahía de Camamu, Bahia, Brasil. Revista de Biologia Tropical, 59(1), 137-149.
Loosanoff VL, Davis HC. 1951. Delaying spawning of lamellibranches by low temperature. Journal of Marine Research 10, 197-202.
Magali F. 2009. Elevage de la crevette : une menace pour les mangroves. Mémoire de maîtrise, Faculté des Sciences ; Université de Sherbrooke, 103 p.
Niekles M. 1995. Scaphopodes et Lamellibranchesrécoltés dans l’Ouest Africain. Atlantide report, 3, 93-237.
Ramos CO, Ferreira JF, Rodrigues de Melo CM. 2013. Maturation of native oyster Crassostrea gasar at different diets in the laboratory, Boletim do Instituto de Pesca, São Paulo, 39(2), 107-120.
Utting SD. 1993. Procedures for the maintenance and hatchery-conditioning of brood stocks. World Aquaculture, 24(3), 78-82.
Utting SD, Millican PF. 1997. Techniques for the hatchery conditioning of bivalve brood stocks and the subsequent effect on egg quality and larval viability. Aquaculture (Amsterdam, Netherlands), 155(1-4), 45-54.
Von CR. 1995.Sea shell of tropical West Africa Marine Bivalve Mollusc from Rio de Oro to Southern Angloa. ORSTOM/C. Hemmen Wiesbaben.
Yapi JN, Blé MC, Etchian AO, Kadjo V, Soro D, Yao K. 2016.Actors and effort of the artisanal harvesting of mangrove oyster Crassostrea gasar along the littoral lagoons Ebrié and Aby (Côte d’Ivoire), International Journal of biosciences 9(6), 45-54. http://dx.doi.org/10.12692/ijb/9.6.45-54
Yapi JN, Blé MC, Etchian AO, Kadjo V, Yao K. 2017. Relative growth and morphometric characterization of mangrove oyster, Crassostrea gasar of the lagoons Ebrié and Aby (Côte d’Ivoire). The Saudi Journal of Life Sciences, 2(3), 89-98. http://dx.doi.org/10.21276/haya
Yusa Y. 2007. Causes of variation in sex ratio and modes of sex determination in the Mollusca – an overview. American Malacological Bulletin 23, 89-98. https://doi.org/10.4003/0740-2783-23.1.89
Jean Noel Yapi, Mélecony Célestin Ble, Assoi Olivier Etchian, Vincent Kadjo, Kouakou Yao (2018), Comparative study of reproduction cycle of mangrove oyster (Crassostrea gasar) of the lagoons Ebrie and Aby (Côte d’Ivoire); JBES, V12, N1, January, P40-51
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