Volume 2, Issue 4 (12-2020)                   JAD 2020, 2(4): 44-54 | Back to browse issues page

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Guegang T, Makombu J G, Tiogue C T, Chiassa A K N, Tchiegang P C M, Zebaze B T et al . Phenotypic characterization of clams of the genus Egeria Roissy, 1805 (Bivalvia: Donacidae) in the lower Sanaga River, Cameroon. JAD 2020; 2 (4) :44-54
URL: http://jad.lu.ac.ir/article-1-105-en.html
1- Laboratory of Applied Ichthyology and Hydrobiology, Department of Animal Productions, Faculty of Agronomy and Agricultural Sciences, The University of Dschang, P.O.Box 222, Dschang, Cameroon , tekouguegang@yahoo.com
2- Department of fisheries and aquatic resources management, Faculty of Agriculture and Vetenary Medicine, University of Buea,P.O.Box 63, Buea, Cameroon
3- Laboratory of Applied Ichthyology and Hydrobiology, School of Wood, Water and Natural Resources, Faculty of Agronomy and Agricultural Sciences, The University of Dschang, P.O.Box 786, Ebolowa Campus, Cameroun
4- Laboratory of Applied Ichthyology and Hydrobiology, Department of Animal Productions, Faculty of Agronomy and Agricultural Sciences, The University of Dschang, P.O.Box 222, Dschang, Cameroon
5- Laboratory of Reproduction and Animal Health, Department of Animal Productions, Faculty of Agronomy and Agricultural Sciences, The University of Dschang, P.O.Box 188, Dschang, Cameroon
Abstract:   (7215 Views)
In order to evaluate wild clams for possible domestication with a view to aquaculture, the present study focused on the phenotypic characteristics of wild clams of the genus Egeria Roissy, 1805 in the Lower Sanaga River of Cameroon, with the main objective of contributing to a better understanding of their biology. A total of 2340 clams of different sizes were collected between March 2018 to March 2019 at three sites in the lower part of the Sanaga River, namely Bolounga-Moulongo, Mpombo-Boloy and Maldjedou-Bonapembe. Phenotypic characteristics (including internal and exterior coloration of the shell, type and number of shell stripes, color of the mantle, shape of the pallial sinus, and indices of elongation, compactness and convexity) were collected on each individual and evaluated according to the site and the season. The results showed four predominant colors on the exterior face of the shell (66.0% yellow, 29.1% brown, 4.7% dark and 0.2% pink), three colors on the internal face of the shell (89.4% white, 10.5% white-purple and 0.1% white-pink), three types and number of shell stripes (57.8% visible stripes, 23.4% barely visible stripes and 18.8% absent stripes), two colors of the mantle (17.5% white and 82.5% orange), two types of the pallial sinus (60.5% dorsally angular, and 39.5% regularly rounded), 99.8% oval shapes (elongation index), 99.7% convex shapes (convexity index) and 52.7% compact shapes (compactness index). The results for clam characteristics were not influenced by the site nor the season, apart from the compactness index which varied according to the site. Phenotypically, the clams of the Lower Sanaga River showed several similarities with the species Egeria radiata and the specimens that showed a pink color of the shell similar to the species Egeria rubicunda. Molecular characterization is therefore necessary to explain the origin of the diversity of phenotypic characteristics in the clam’s species population in this area.
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Type of Study: Original Research Article | Subject: Species Diversity
Received: 2020/08/15 | Accepted: 2020/11/19 | Published: 2021/03/28

1. Abarike, E. D., Alhassan, E. H. and Alipui, P. E., (2015). Trading in the Volta clam, Galatea paradoxa in the Lower Volta Basin of Ghana. Elixir Aquaculture, 81: 31514–31518.
2. Adjei-Boateng, D. and Wilson, J. G. (2012). Population dynamics of the freshwater clam Galatea paradoxa from the Volta River, Ghana. Knowledge and Management of Aquatic Ecosystems, 405 (9): 1–12. http://doi.org/10.1051/kmae/2012017 [DOI]
3. Adjei-Boateng, D. and Wilson, J. G. (2013). Body condition and gametogenic cycle of Galatea paradoxa (Mollusca: Bivalvia) in the Volta River estuary, Ghana. Estuarine, Coastal and Shelf Science, 132: 94–98. http://doi.org/10.1016/j.ecss.2011.06.018 [DOI]
4. Adjei-Boateng, D. and Wilson, J. G. (2016). Sexual strategy in the freshwater bivalve Galatea paradoxa (Donacidae) from the Volta River estuary, Ghana. Molluscan Research, 36 (1): 1–8. https://doi.org/10.1080/13235818.2015.1054021 [DOI]
5. Adjei-Boateng, D., Agbo, N. W., Agbeko, N. A., Obirikorang, K. A. and Amisah, S. (2012). The current state of the clam, Galatea paradoxa, fishery at the Lower Volta River, Ghana. International Institute of Fisheries Economics and Trade, Tanzania Proceedings, 1–12. https://doi.org/10.13140/2.1.1966.6883 [DOI]
6. Ajonina, P. U., Ajonina, G. N., Jin, E., Mekongo, F., Ayissi, I. and Usongo, L. (2005). Gender roles and economics of exploitation, processing and marketing of bivalves and impacts on forest resources in the Sanaga Delta region of Douala-Edea wildlife reserve, Cameroon. International Journal of Sustainable Development and World Ecology, 12 (2): 161–172. https://doi.org/10.1080/13504500509469627 [DOI]
7. Basso, L., Vázquez-Luis, M., García-March, J. R., Deudero, S., Alvarez, E., Vicente, N., Duarte, C. M., and Hendriks, I. E. (2015). Chapter three - The Pen Shell, Pinna nobilis: A review of population status and recommended research priorities in the Mediterranean Sea. Advances in Marine Biology, 71: 109–160. https://doi.org/10.1016/bs.amb.2015.06.002 [DOI]
8. Bernardi, A.-C. (1860). Monographie des genres Galatea et Fischeria. Paris Imprimerie de Louis Tinterlin et C, Rue Neuve-des-Bons-Enfants, 3: 81 pp. [In French] https://doi.org/10.5962/bhl.title.48484 [DOI]
9. Caill-Milly, N., Bru, N., Barranger, M., Gallon, L. and D’Amico, F. (2014). Morphological trends of four Manila clam populations (Venerupis philippinarum) on the French Atlantic Coast: identified spatial patterns and their relationship to environmental variability. Journal of Shellfish Research, 33 (2): 355–372. https://doi.org/10.2983/035.033.0205 [DOI]
10. Caill-Milly, N., Bru, N., Mahé, K., Borie, C. and D’Amico, F. (2012). Shell shape analysis and spatial allometry patterns of Manila Clam (Ruditapes philippinarum) in a Mesotidal Coastal Lagoon. Journal of Marine Biology, 2012 (1): 1–11. https://doi:10.1155/2012/281206 [DOI]
11. CWCS (2006). Report of activities 2005/ Rapport d’activités 2005. Cameroon Wildlife Conservation Society, Mouanko, Cameroon. pp. 41–42.
12. CWCS (2009). CWCS Douala-Edea Forest Project: Report of activities/ Rapport d’activités 2008. Cameroon Wildlife Conservation Society, Mouanko, Cameroon, 45 pp.
13. Daget, J. (1998). Catalogue raisonné des Mollusques bivalves d'eau douce africains. Backhuys Publishers/Orstom, Leiden/Paris. 329 pp. [In French]
14. Dikoume, A., Ajonina, G. and Tomedi, M. (2017). Diversity of phytoplankton for nutritional selectivity by Galatea paradoxa (born 1780) of lower Sanaga Delta, Cameroon. International Journal of Fisheries and Aquatic Research, 2 (6): 34–42.
15. Dikoume, A., Jacqueline, B., Bruna, N., Guegang, T., Eugene, D., Gordon, A. and Minette, T. (2016). Bio-ecological assessment of clams of the lower Sanaga Delta. Cameroon. International Journal of Fisheries and Aquatic Studies, 4 (6): 495–505.
16. Etim, L. and Brey, T. (1994). Growth, productivity, and significance for fishery of the bivalve Egeria radiata (Donacidae) in the Cross River, Nigeria. Archives of Fishery and Marine Research, 42 (1): 63–75.
17. Etim, L., Brey, T. and Arntz, W. (1997). Quantification of the sinusoidal trajectory in tissue mass and condition indices of a bivalve (Egeria radiata) in the Cross River, Nigeria. Journal of Molluscan Studies, 63 (1): 101–108. https://doi.org/10.1093/mollus/63.1.101 [DOI]
18. FAO (2016). FAO species identification guide for fishery purposes: the living marine resources of the Eastern Central Atlantic. Volume 2: Bivalves, gastropods, hagfishes, sharks, batoid fishes, and chimaeras. FAO, Rome, Italy. 862 pp.
19. Fernández-Pato, C. and Arnal, J. I. (1977). Relations biométriques de la palourde, Venerupis decussata L., de la Baie de Santander (Espagne). Conseil International pour l’Exploitation de la Mer. Comité des Crustacés, Coquillages et Benthos, 17: 1–2. [In French]
20. Html color code: https://htmlcolorcodes.com/fr/ [In French]
21. IUCN (2010). Liste rouge des mollusques (Gastéropodes et bivalves). Centre Suisse de Cartographie de la Faune (CSCF), Neuchâtel. 150 pp. [In French]
22. Nedeau, E. J., Smith, A. K., Stone, J. and Jepsen, S. (2009). Freshwater Mussels of the Pacific Northwest. Second Edition. The Xerces Society for Invertebrate Conservation, Oregon, USA. 51 pp.
23. Obirikorang, K. A., Adjei-Boateng, D., Madkour, H. A., Amisah, S. and Otchere, F. A. (2013a). Length-Weight relationship of the freshwater clam, Galatea paradoxa (Born, 1778) from the Volta estuary, Ghana. Pakistan Journal of Biological Sciences, 16 (4): 185–189. https://doi.org/10.3923/pjbs.2013.185.189
24. Obirikorang, K. A., Amisah, S. and Adjei-Boateng, D. (2013b). Habitat description of the threatened freshwater clam, Galatea paradoxa (Born 1778) at the Volta Estuary, Ghana. Current World Environment, 8 (3): 331–339. https://doi.org/10.12944/CWE.8.3.01 [DOI]
25. Odiete, W. O. (1981). The cruciform muscle complex in Egeria radiata L. (Bivalvia, Tellinacea, Donacidae). BASTERIA, 45: 57–63
26. Olayemi, I. K., Ayanwale, A. V., Odeyemi, O. M. and Mohammed, A. Z. (2012). A comparative study of the anatomy of two West African edible bivalves, Aspatharia sinuata (Mutellidae: :union:acea) and Egeria radiata (Donacidae: Tellinacea Minna, Nigeria. International Journal of Advanced Biotechnology Research, 4 (1 and 2): 114–120.
27. Olutoge, F. A., Nwabueze, S. E., Olawale, S. O. A. and Yabefa, B. E. (2016). Performance of Clam (Egeria radiata) Shell Ash (CSA) as a Substitute for Cement in Concrete. International Journal of Recent Development in Engineering and Technology, 5 (9): 33–38.
28. PANGIRE (2009). Plan d’action national de gestion intégrée des ressources en eau (PANGIRE). État des lieux du secteur: Connaissance et usages des ressources en eau, Cameroun, Global Water Patnership. 199 pp. [In French]
29. PNDP (2018). Rapport d’étude: Mécanisme de contrôle citoyen de l’action publique dans la commune de Mouanko. Appui technique et financier du Programme National du Développement Participatif (PNDP) en collaboration avec l’Institut National de la Statistique (INS). Réalisée par l’Institut Panafricain pour le Développement Afrique-Centrale (IPD-AC). 87 pp. [In French]
30. Purchon, R. D. (1963a). A note on the biology of Egeria radiata Lam. (Bivalvia, Donacidae). Journal of Molluscan Studies, 35 (6): 251–271. https://doi.org/10.1093/oxfordjournals.mollus.a064926 [DOI]
31. Purchon, R. D. (1963b). Phylogenetic classification of the Bivalvia, with special reference to the Septibranchia. Journal of Molluscan Studies, 35 (2–3): 71–81. https://doi.org/10.1093/oxfordjournals.mollus.a064903 [DOI]
32. Tekou, G. (2017). Caractéristiques morpho-biométriques des palourdes du genre Egeria (Roissy, 1805) dans le fleuve Nkam (Cameroun). Mémoire de Master, Département de Zootechnie, FASA, Université de Dschang (Cameroun), 63 pp. [In French]
33. Tekou, G., Dikoume, A. T, Zango, P., Banjem, J. S., Ngassam, B. G., Ajonina, G. N. and Tomedi, M. E. (2015). Caractérisation phénotypique des palourdes dans la basse Sanaga (Mouanko, Sanaga Maritime, Littoral Cameroun). 22ème conférence annuelle du CCB. [In French]
34. Tekou, G., Makombu, J. G., Tiogue, C. T., Tchiegang, P. C. M., Nguedia, C. F. and Kenfack, A. (2020). Caractéristiques physico-chimiques de l’eau et du substrat des palourdes Egeria (Roissy, 1805) dans le fleuve Sanaga, Cameroun. Afrique Science, 17 (1): 47–58. [In French]
35. Tripathy, B. and Mukhopadhyay, A. K. (2015). Marine Molluscan diversity in India, In: Venkataraman, K. and Sivaperuman, C. (Eds.), Marine faunal diversity in India: Taxonomy, ecology and conservation. First Edition. Academic Press, London, UK. pp. 39–74. https://doi.org/10.1016/B978-0-12-801948-1.00004-5 [DOI]
36. Watanabe, S. and Katayama, S. (2010). Relationships among shell shape, shell growth rate, and nutritional condition in the manila clam (Ruditapes philippinarum) in Japan. Journal of Shell Fish Research, 29 (2): 353–359. https://doi.org/10.2983/035.029.0210 [DOI]

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