Research of some physicochemical and biological pollution indicators in four fisheries of the northern part of Cameroon

Maïworé Justine, Tatsadjieu Ngoune Léopold, Montet Didier, Mbofung Carl Moses. 2013. Research of some physicochemical and biological pollution indicators in four fisheries of the northern part of Cameroon. Intrenational Research Journal of Microbiology, 4 (6) : 147-155.

Résumé : The bacteriological and physicochemical characteristics of water and sediment collected in four fisheries situated in the north of Cameroon were evaluated. In these locations, all the analysed parameters (temperature, pH, salinity, conductivity, turbidity, suspended matter, organic matter, phosphates, sulphates, nitrates, chloride, calcium, magnesium, iron and nitrogen) were the highest, except for chlorides. Total mesophile aerobic flora varied between 1.4±0.50×105 in Tibati and 5.57±0.50×106 CFU/mL in Lagdo. Salmonella concentration was comprised between 66.66±1.62 in Tibati and 274±3.16 CFU/mL in Yagoua. There was about 10±0.50 CFU/mL Vibrio in Lagdo and 342.27±5.53 CFU/mL in Maga. Staphylococcus concentration was between 1.4±0.55×103 CFU/mL in Tibati and 4.44±0.9×104 in Maga. Clostridia were comprised between 0.33±0.00 in Tibati and 226.66±4.29 CFU/mL in Maga while Pseudomonas concentration was comprise between 16.26±0.70 in Tibati and 326.66±6.00 CFU/mL in Lagdo. Faecal Streptococcus varied between 0.33±0.00 in Tibati and 238.66±8.15 CFU/mL in Yagoua. The total mesophile aerobic flora was significantly high (P<0,005) in Lagdo while Clostridium, faecal streptococcus, and Streptococcus concentration were significantly high in Maga, Yagoua and Lagdo. Lake's sediments in Maga were the most infected. The different analysis revealed that the fisheries were relatively polluted. Some of the bacteria counted like Pseudomonas and Vibrio might be pathogenic for fishes.

Mots-clés Agrovoc : pollution de l'eau, pêches, propriété physicochimique, flore microbienne, qualité de l'eau, analyse microbiologique, Pseudomonas, Streptococcus, Salmonella, contamination biologique, sédiment

Mots-clés géographiques Agrovoc : Cameroun

Classification Agris : M12 - Production de l'aquaculture
P02 - Pollution
Q03 - Contamination et toxicologie alimentaires

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Maïworé Justine, Université de Maroua (CMR)
• Tatsadjieu Ngoune Léopold, Université de Ngaoundéré (CMR)
• Montet Didier, CIRAD-PERSYST-UMR Qualisud (FRA)
• Mbofung Carl Moses, Université de Ngaoundéré (CMR)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570050/)

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