Paper Details

Spatial  variation  of  aquatic  insect  community  in  fish  farms pond in the Southern Côte d’ivoire, West Africa

Yapo  Michel Laurince, Sylla  Soumaïla,  O. Edia  Edia,  Atse  Boua Célestin, Kouassi Philippe

DOI: https://dx.doi.org/10.12692/ijb/4.10.309-321

Int. J. Biosci. 4(10), 309-321. May, 2014. (PDF)

Abstract:

Species composition and community structure of aquatic insects carried out from December 2007 to November 2008 in five fish farm ponds in Southern Côte d’Ivoire (Layo, Banco, Azaguié, Anyama I and Anyama II). Samples were collected monthly in water column and sediment using a 350 µm mesh hand net and a Van veen grab respectively. Each habitat was collected in six replicates. A total of 79 taxa belonging to 35 families and 8 orders were identified. Eight of them (Cloeon bellum, Cloeon gambiae, Cloeon smaeleni, Valleriola sp., Corydalidae, Bagous sp., Pseudobagous sp. and Macroplea sp) were reported for the first time in Côte d’Ivoire aquatic ecosytems. Significant assemblage differences between insect communities from freshwater and brackish water were observed. However, the common dominant species for freshwater and brackish water were Anisops sardea, Eurymetra sp., Limnogonus chopardi, Mesovelia sp., Ranatra parvipes, Nilodorum fractilobus, Tanypus fuscus, Chironomus imicola, Ceratopogon sp., Chaoborus anomalus, Stictochironomus sp., Cloeon bellum and Cloeon gambiae. The station of Banco recorded the highest species diversity (H’), evenness (J), species richness (d) and dominance (λ) indices of aquatic insects. The five stations were clustered into three groups with similar species composition at 75% similarity. According ANOSIM routine, seventeen species are responsible for the dissimilarity between the groups defined. Anisops sardea represents the largest share of this dissimilarity.