Bulletin of the Sea Fisheries Institute 3 (154) 2001 - Bacterial microflora in the contents of Baltic herring (Clupea harengus) intestinal tracts during spawning in the polluted Vistula Lagoon

Bacterial microflora in the contents of Baltic herring (Clupea harengus) intestinal tracts during spawning in the polluted Vistula Lagoon
Bulletin of the Sea Fisheries Institute 3 (154) 2001, pp. 83-90

Izabella Zmysłowska
University of Warmia and Mazury, Prawocheńskiego 1, 10-957 Olsztyn, Poland

Key words: Baltic Sea, Vistula Lagoon, bacteria, water, herring, intestinal tract

Abstract.
Quantitative investigations revealed that bacteria incubated on a common agar medium at temperatures of 20°C (TVC 20°C) and 37°C (TVC 37°C) occurred in the ranges of 3,800 to 18,300 and from 900 to 6,700 cfu in 1 ml of Vistula Lagoon water, respectively. The same bacteria groups identified in herring intestinal tract contents varied from 4,210 to 37,700 (TVC 20°C) and 950 to 28,840 (TVC 37°C) cfu/g.
Qualitative investigations revealed a similar composition of bacteria in water and intestinal tract contents. The following bacteria were confirmed in both environments: Vibrio, Pseudomonas, Aeromonas, Enterobacter, Escherichia, Streptococcus and Staphylococcus. Bacillus and Micrococcus occurred only in the water.