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  1. Seasonal incidence of some heterotrophic aerobic bacteria in Bahrain pelagic and nearshore waters and oysters.

    Article - En anglais

    Concentrations of four bacterial groups namely coliforms, Vibrio cholerae, V. parahaemolyticus and Faecal streptococci in sea water and oyster (Pinctada radiata) were investigated from March 1991 to March 1992 at nearshore site and a pelagic site.

    In seawater, coliforms were isolated in high numbers during September-October at both sites, while in oyster coliforms were higher than those in water all through the study period, with no definite pattern.

    Both V. cholerae and V. parahaemolyticus were present in seawater and oysters during the warmer months (June, July, September and October).

    In oysters, V.. cholerae was more prominent than V. parahaemolyticus.

    Faecal streptococci were detected mainly in waters of both sites during September and October.

    Peak counts in oysters at both sites occurred in July ; and they were five times greater at the pelagic site.

    In general, most bacteria were isolated from the pelagic waters and oyster samples, and they were highest during the warmer months.

    Some disappeared totally during February and March.

    Water temperature was found to have greater influence on distribution of different bacteria in water and oysters, compared with other environmental factors.

    Mots-clés Pascal : Golfe Persique, Bahrein, Asie, Pollution eau, Qualité eau, Contamination biologique, Huître, Bivalvia, Mollusca, Invertebrata, Eau mer, Milieu marin, Coliforme, Vibrio cholerae, Vibrionaceae, Bactérie, Vibrio parahaemolyticus, Streptococcus, Streptococcaceae, Micrococcales, Variation saisonnière, Pinctada radiata

    Mots-clés Pascal anglais : Persian Gulf, Bahrain, Asia, Water pollution, Water quality, Biological contamination, Oyster, Bivalvia, Mollusca, Invertebrata, Seawater, Marine environment, Coliforms, Vibrio cholerae, Vibrionaceae, Bacteria, Vibrio parahaemolyticus, Streptococcus, Streptococcaceae, Micrococcales, Seasonal variation

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0295681

    Code Inist : 002B30A02A. Création : 15/07/1997.