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Biometric, Length–Weight Relationships and Condition Factor of the African Clam Galatea paradoxa (Born, 1778) in the Lower Sanaga River of Cameroon

Guegang Tekou, Judith Georgette Makombu, Claudine Tiogue Tekounegning, Alexia Kévine Noubissi Chiassa, Stephane Kehou, Augustave Kenfack

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Int. J. Biosci.20(6), 185-196, June 2022

DOI: http://dx.doi.org/10.12692/ijb/20.2.1-20

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Galatea paradoxa is the most economically important bivalve species in Cameroon.This study focused on biometric and length-weight relationships in the lower Sanaga River of Cameroon from March 2018 to March 2019. Samples were collected each month manually and randomly and their biometrics characteristics were recorded. The Von Bertalanffy equation was used to assess linear growth, while relative growth was done according to Goulletquer. Condition factor was also evaluated. A total of 2340 specimens were examined. The length and average weight were respectively 59.51± 12.96 mm and 37.40 ± 19.94 g. For biometric characteristics, individuals were more abundant for size intervals between 50 and 65 mm regardless of the sampling season with the highest values during the long dry season (16%). The metric and weight values showed little variations (p<0.05) between seasons, the metric data showed a low heterogeneity (CV <25%) while weight measurement showed high heterogeneity during the light rainy season (L = 59.9 ± 14.0 mm and P = 43.2 ± 23.9 mg). The Von Bertalanffy growth parameters obtained were L∞ = 97.82mm and K = 0.26 year-1. Depending on the season, three forms of allometry growth model were observed, while the length-weight relationship showed negative allometry (b <3). Condition factors are significantly different (P˂0.05) between seasons with the lowest (1.5±0.5) and highest (2.0±1.4) values recorded in the long dry season and light rainy season, respectively. Such data is valuable for establishing a monitoring and management system of clams of the genus Galatea in Cameroon.


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Biometric, Length–Weight Relationships and Condition Factor of the African Clam Galatea paradoxa (Born, 1778) in the Lower Sanaga River of Cameroon

Adjei-Boateng D, Agbo NW, Agbeko NA, Obirikorang KA, Amisah S. 2012. The Current State of the Clam, Galatea paradoxa, Fishery at the Lower Volta River, Ghana. Conference Paper January 2012. International Institute of Fisheries, Economics and Trade, Tanzania Proceedings. p 12. http://dx.doi.org/10.13140/2.1.1966.6883

Adjei-Boateng D, Wilson JG. 2012. Population dynamics of the freshwater clam Galatea paradoxa from the Volta River, Ghana. 12p, Knowledge and Management of Aquatic Ecosystem 405, p 09. http://dx.doi.org/10.1051/kmae/2012017   http://www.kmae-journal.org

Ajonina PU, Ajonina GN, Jin E, Mekongo F, Ayissi I, Usongo L. 2005. Gender roles and economics of exploitation, processing and marketing of bivalves and impact of forest resources in the Sanaga Delta region of Douala-Edea wildlife reserve, Cameroon. International Journal of Sustainable Development and World Ecology 12, 161-172.

Amedzro JJ. 2015. Assessment of growth and management of the clam Galatea paradoxa fishery at the lower Volta, Ghana. Master of philosophy, Kwame Nkrumah University of Science and Technology. p 85.

Benchikh N. 2009. Etude de la croissance et du cycle de reproduction de la moule Perna perna dans le golfe d`Annaba et le littoral d`El Kala. Mémoire en Synécologie fonctionnelle des communautés et parasitisme en milieu aquatique, Université Badji-Mokhtar, Annaba. p 112.

Bernardi LCA-C. 1860. Monographie des genres Galatea et Fischeria. Paris imprimerie de Louis Tinterlin et C, rue Neuve-des-bons-enfants p 3, 81.

Caill-Milly N, Bru N, Barranger M, Gallon L, D’Amico F. 2012 a. Morphological trends of Manila clam (Venerupis philippinarum) as spatial patterns and following environmental variability. Journal of Shellfish Research, p 34.

Caill-Milly N, Bru N, Mahé K, Borie C, D’Amico F. 2012 b. Shell shape analysis and spatial allometry patterns of Manila Clam (Ruditapes philippinarum) in a Mesotidal Coastal Lagoon. Journal of Marine Biology p 1, 11.

CWCS. 2006. CWCS Douala-Edéa Forestproject : Report of activities/ Rapport d’activités 2005. Cameroon Wildlife Conservation Society, Mouanko, p 42.

CWCS. 2009. CWCS Douala-Edéa Forestproject : Report of activities/ Rapport d’activités 2008. Cameroon Wildlife Conservation Society, Mouanko, p 45.

Deval CM. 2009. Growth and reproduction of the wedge clam (Donax trunculus) in the Sea of Marmara, Turkey. Journal of Applied Ichtyology 25 (5), 551-558, https://doi.org/10.1111/j.1439-0426.2009.01258.x

Dikoume A, Ajonina G, 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. www.fishjournals.com

Dikoume A, Banjem J, Ngassam B, Tekou G, Diyouke E, Ajonina G, Tomedi M. 2016. Bio-ecological assessment of clams of the lower Sanaga Delta. Cameroun. International Journal of Fisheries and Aquatic Studies 4(6), 495-505. http://dx.doi.org/10.1300/J038v13n03_05

Essome BJ. 2016. Analyse de la chaîne de valeur des palourdes dans la basse Sanaga (Mouanko, Sanaga Maritime, Littoral Cameroun). Mémoire de Master professionnel en Sciences Halieutiques, Université de Douala Cameroun, p 100.

FAO. 2016a. Situation mondiale des pêches et de l’aquaculture; Département de Pêches et Aquaculture, FAO (Ed), Rome (Italie), p 227.

FAO. 2016b. 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, p 862.

FAO. 2018. Situation mondiale des pêches et de l’aquaculture 2018, Rome, p 254.

Fernandez PC, Arnal JI. 1977. Relations biométriques de la palourde, Venerupis decussata de la Baie de Santander (Espagne). Conseil International pour l’Exploitation de la Mer, Comité des Crustacés, Coquillages et Benthos. C.M. /K 17, 1-2.

Froese R. 2006. Cube law, condition factor and weight-length relationships: history, meta-analysis and recommendation. Journal of Applied Ichthyology 22, 241-253.

Goulletquer P. 1983. Croissance et reproduction de Ruvitapes philippinarum (Avams ~ Reeve 1850) en fonction des conditions d’élevage (milieu lagunaire et claire). Mémoire Etudes approfondies d’Ecophysiologie de la reproduction et dynamique des populations animales. Université de POITIERS, p 37.

Grangnery A. 2001. Etude et modalisation de la dynamique des populations des principaux bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) et des principaux epibiontes des étangs de Thau. Thèse de doctorat, 1999-2000. https://archimer.ifremer.fr/doc/2003/these-102.pdf

IFREMER, 2009. V1-Fiche réalisée pour Bibliomer http://www.bibliomer.com/ et le centre de veille des produits aquatiques IFREMER Brest, Pointe du Diable, 29280 Plouzané, 9p. http://veilleproduitsaquatiques.com/

Jisr N, Younes G, Sukhn C, El-Dakdouki MH. 2018. Length-weigth relationships and relative condition factor of fish inhabiting the marine area of the Eastern Mediterranean city, Tripoli-Lebanon. Egyptian Journal of Aquatic Research 44, 299-305 https://doi.org/10.1016/j.ejar.2018.11.004

Jurić I, Bušelić I, Ezgeta-Balić D, Vrgoč N, Peharda M. 2012. Age, Growth and Condition Index of Venerupis decussata (Linnaeus, 1758) in the Eastern Adriatic Sea. Turkish Journal of Fisheries and Aquatic Sciences 12, 613-618. http://dx.doi.org/10.4194/1303-2712-v12_3_08

King RP, Egwali EC, Nkanta NA. 1992. Population dynamics of the freshwater clam Galatea paradoxa (Donacidae) in the Cross River, Nigeria. Fishbyte 9, 34-36.

Laudien J. 2002. Population dynamics and ecology of the surf clam Donax serra (Bivalvia, Donacidae) inhabiting beaches of the Benguela upwelling system. Dissertation, University of Bremen, Germany; Ber. Polarforsch. Meeresforsch. p 432.

Lizama ML, Ambrósio AM. 2002. Condition factor in nine species of fish of the characidae family in the upper paraná River floodplain, brazil. Brazil. Journal of Biology 6, 113-124.

Moses BS. 1990. Growth, biomass, mortality, production and potential yield of the West African clam, Egeria radiate (Lamarck) Lamellibranchia, Donacidae) in the Cross River system, Nigeria, Hydrobiologia 196, 1-15.

Ndiaga T, Anis D. 2010. Module de formation des formateurs sur le suivi des mollusques d’eau douce, Projet de démonstration Bassin du fleuve Gambie, p 44.

Obirikorang KA, Adjei-Boateng D. Madkour HA, Amisah S, Otchere FA. 2013. Length-Weight relationship of the freshwater clam, Galatea paradoxa (Born, 1778) from the Volta estuary, Ghana. Pakistan Journal of Biology Sciences 16(4), 185-189. http://dx.doi.org/10.3923/pjbs.2013.185.189

Peharda M, Ezgeta-Balić D, Radman, Sinjkević N, Vrgoč N, Isajlović I. 2012. Age, growth and population structure of Acanthocardia tuberculata (Bivalvia: Cardiidae) in the eastern Adriatic Sea. Sciencia Marina 76(1), 59-66. http://dx.doi.org/10.3989/scimar.03257.21A

Schwarz da Rocha S, Souza da Silva RL, Jayane de Lima Santos, Guilherme d’Oliveira. 2015. Length-weight relationship and condition factor of Macrobrachium amazonicum (Heller, 1862) (Decapoda, Palaemonidae) from a reservoir in Bahia, Brazil. Nauplius 23(2), 149-161. http://dx.doi.org/10.1590/S0104-64972015002308

Tchamba A. 2012. Evaluation de l’évolution de la qualité nutritionnelle et bactériologique des palourdes dans la Basse Sanaga (Mouanko). Mémoire de Master professionnel en Sciences Halieutiques, Université de Douala Cameroun, p 54.

Tekou G. 2015. Caractérisation phénotypique des palourdes dans la Basse Sanaga (Mouanko, Sanaga Maritime, Littoral Cameroun). Mémoire de Master professionnel en Sciences Halieutiques, Université de Douala Cameroun, p 103.

Tekou G. 2017. Caractéristiques morpho-biométriques des palourdes du genre Egeria (Roissy, 1805) dans le fleuve Nkam (Cameroun). Mémoire de Master recherche en biotechnologie et Productions Animales, Université de Dschang Cameroun, p 63.

Trisyani N, Hadimarta F. 2013. The maturity level of the Solen sp. Gonads on the East Coast of Surabaya. Journal Ilmu Kelautan 18(1), 39-44.

Trisyani N, Herawati EY, Widodo MS, Setyohadi D. 2016. The length-weight correlation and population dynamics of razor clams (Solen regularis) in Surabaya east coast, Indonesia. Biodiversitas 17, 808-813. http://dx.doi.org/10.13057/biodiv/d170258

Udoh J, Umoh SG. 2007. Marketing of the Fresh Water Clam (Galatea paradoxa) in South eastern Nigeria. Journal of Food Products Marketing 13(3), 79-94.

Von Bertalanffy L. 1938. A Quantitative theory of organic growth. Human Biology 10(2), 181-213. :Intertidal clams, consulted on 03/04/2019 08:49. www.pac.dfo.mpo.gc.ca


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