Abundance Dynamic of Vibrio Cells Associated with Freshwater ShrimpsAtyidae (Crustacea-Decapoda) in the Coastal Surface Waters of Cameroon(Central Africa): Assessment of the Role of some Environmental Factors

Archive ouverte

Koji, E | Lontsi Djimeli, C | Tamsa Arfao, A | Noah Ewoti, V | Tchakonté, S | Bricheux, Geneviève | Nola, M | Sime-Ngando, T

Edité par CCSD ; Excellent Publishers -

International audience. The abundance dynamics of planktonic Vibrio cells and those associated with thefreshwater shrimps Atyidae were assessed in the coastal surface waters ofCameroon (Central Africa). Two pathogenic species V. parahaemolyticus and V.alginolyticus were identified. The concentration of Vibrio cells associated toshrimps was relatively high, as compared to the planktonic cells. Thisconcentration was very high during the great rainy season. The concentration ofVibrio associated with Atyidae undergoes variations under the effect of theproliferation of shrimps and influenced by color and rainfall. The physico-chemicalanalyses showed a strong organic pollution. Low nutrient levels suggested highwater column turnover rate, which Vibrio compensated for by using organicmatters leaking from shrimp. Stepwise regression analyses showed that theconcentration of plaktonic Vibrio cells increase significantly in response to changesto dissolved oxygen and organic matter accumulated in the water column due toanthropogenic activities. Vibrio associated with shrimp Atyidae in surface watersare a real risk of public health.

• Description
• Sujet/Public
• Outil
• Outil d'anticipation
• Mémoire et thèse
• Gestion