Variation Morphologique Adaptative Des Populations De Sarotherodon Melanotheron Des Secteurs IV Et V De La Lagune Ebrié (Côte d’Ivoire) Face Au Stress Chimique

  • Bopo Zadi Sylvain Olivier Etudiant-Doctorant, Laboratoire de Génétique, UFR Biosciences, Université Félix Houphouët-Boigny, Abidjan, Côte d’Ivoire
  • Sokouri Didier Paulin Maitre de Conférences, Laboratoire de Génétique, UFR Biosciences, Université Félix Houphouët-Boigny, Abidjan, Côte d’Ivoire
  • Nobah Céline Sidonie Koco Maitre de Conférences Science et Technique, Section Sciences de la Vie et de la Terre, Ecole Normale Supérieure (ENS), Abidjan, Côte d’Ivoire
  • AtséBoua Célestin Directeur de Recherche, Centre de Recherches Océanologiques (CRO), Abidjan, Côte d’Ivoire

Abstract

The impact of chemical pollution on organism’s characteristics was assessed through morphological features in IV and V sectors of Ebrié Lagoon using Sarotherodon melanotheron (Rüppel, 1852) as bioindicator. Sampling was carried out during a whole year in three sites (Layo, N’djem and Ahua) characterized by contrasted environments(respectively moderate, medium and high levels of pollution). The morphological studies were based on morphometric biomarkers such as fluctuating asymmetry (FA) and average body shape. Fluctuating asymmetry was evaluated among individuals within sites using ANOVA Procrustes. Average body shape was compared among sampling sites using Principal Components Analysis (PCA), Canonical Variates Analysis (CVA) and MANOVA. Fluctuating asymmetry did not vary between sampling sites. However, the average body shape was significantly different between specimens from Ahua and both those from Layo and N’djem. There was no significant difference between fish from Layo and those from N’djem.Allometric effects and the abiotic parameters influenced, to some extent, the body shape of individuals.A morphological differentiation according to the geographical distance was also observed. The study revealed a morphological adaptation of the populations of S. melanotheron in the study area.

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Published
2018-05-31
How to Cite
Olivier, B. Z. S., Paulin, S. D., Koco, N. C. S., & Célestin, A. (2018). Variation Morphologique Adaptative Des Populations De Sarotherodon Melanotheron Des Secteurs IV Et V De La Lagune Ebrié (Côte d’Ivoire) Face Au Stress Chimique. European Scientific Journal, ESJ, 14(15), 327. https://doi.org/10.19044/esj.2018.v14n15p327