The author compares 12 hierarchical models in the aim of estimating the abundance of fish in alpine streams by using removal sampling data collected at multiple locations. The most expanded model accounts for (i) variability of the abundance among locations, (ii) variability of the catchability among locations, and (iii) residual variability of the catchability among fish. Eleven model reductio...

The present study reports the results of virological survey in fish with an emphasis on the diseases included in the Czech National Legislation. Monitoring of fish both without symptoms and with a manifested disease was performed within this virological surveillance. Between January 1999 and December 2006, viral haemorrhagic septicaemia virus (VHSV), infectious haematopoetic necrosis virus (IHN...

The aim of the present study was to investigate the histopathological changes on the organs of the brown trout (Salmo trutta m. fario) inflicted by per oral cadmium and zinc poisoning in the 46week experimental period. The fish were kept in well-oxygenated freshwater basins which were purposely set for the experiment. During the investigation, we set up two experimental basins along with the co...