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Aquaculture is a rapidly growing industry that is vital to supplying the increasing demand for food production worldwide. In recent decades, Aristichtys nobilis (Bighead carp) and Hypophthalmichthys molitrix (Silver carp) have been widely introduced into European waters for algal control and as a food source. This species are very sensitive to various environmental and physical stresses and thus more susceptible to bacterial invasions resulting in disease outbreak and mortality. The ma jority of bacterial fish pat...

Bacterial density, biomass, morphological dive rsity and cell integrity were studied in surficial sediment samples taken form eight locations on the Romanian coast. Investigation was done by epifluorescence microscopy, employing SYBR Green I (universal fluorochrome) and propidium iodide (for visualising cells with damaged membranes). Cell density varied between 4.62-9.64 × 107 cells/cm3 sediment, showing a relation to sediment grain size. Dry biomass ranged between 3.03-6.39 µg/cm 3. Rod shaped bacteria were domin...