Sanitary and bacteriological studies of water and European catfish (Silurus glanis L.) during wintering

Abstract

Sanitary and bacteriological studies were conducted during European catfish (Silurus glanis L.) wintering from January 3, 2001 to March 7, 2001. Samples of water, skin and digestive tract contents were collected every two weeks. Qualitative analyses included culturing heterotrophic bacteria on a broth-agar medium at temperatures of 4°C for 7 days of incubation (TVC 4°C), 22°C for 72 hours of incubation (TVC 22°C) and 37°C for 24 hours of incubation (TVC 37°C). The total number of coliforms (TC), the total number of fecal coliforms (FC) and the total number of fecal streptococci (FS) were determined. The results obtained confirmed that the sanitary and bacteriological state of the water in the wintering pond was good. The number of microbes per cm2 of skin varied from 103 to 104, and in 1 g of digestive tract contents from 103 to 105.

CORRESPONDING AUTHOR:

Iwona Gołaś, Uniwersytet Warmińsko-Mazurski, Katedra Mikrobiologii Środowiskowej, 10-957 Olsztyn-Kortowo, ul. Prawocheńskiego 1; Tel./Fax: +48 89 5234532;
e-mail: katmik@moskit.uwm.edu.pl