Microbiological study of ide (Leuciscus idus L.) from ponds of different trophy

Abstract

Microbiological status of water and ide (Leuciscus idus L.) reared in polyculture with common carp was evaluated. The fish were reared in the Ostróda-Warlity Fish Farm, in two ponds supplied with the water from Szeląg Wielki Lake, and in one biological pond supplied with treated domestic wastewater in Łężany Fish Farm. Quantitative analyses comprised counts of bacteria grown on standard agar in 20°C and 37°C, total counts of coliforms, fecal coliforms, fecal streptococci, ammonifying bacteria and fungi in water of the three ponds and in muscles, skin mucus, and digestive tract contents of ide. Qualitative analyses consisted of identification to the genus bacteria isolated on standard agar in 20°C, and on Endo medium in 37°C, from the digestive tract contents of ide.