Žermanice Reservoir; ichthyocenosis; rapacious carp; spawning shoal; age structure; sex ratio; growth.

Vroce 2001 byly získányinformace o adultní části populaci bolena dravého ve vodní nádrži Žermanice. Analýzou lepidilogického a vyhodnocením naměřených údajů z 60 jedinců bylo zjištěno, že délka těla ulovených ryb se pohybovala v rozmezí 275 - 610 mm, hmotnost ulovených jedinců činila 296 - 4100 g. Ryby náležely do II. - VII. věkové skupiny. Vztah délky těla a diagonálním poloměrem šupiny je vyjádřen rovnicí y = 0,3424 x ? 4,4824. Délkohmotností závislost lze vyjádřit vztahem log w = 2,9324 x ? 4,6064 . log.L.Hodnota bankova startu činila 37,2 mm.

In 2001 information on the rapacious carp population of the Oder river basin was obtained. An analysis of growth was performed on a sample of scale material removed from 68 individuals (60 of which were adult) which, at the time of reproduction, were concentrated in the flow of the Lučina River entering the Žermanice Reservoir. Evaluation of measured data revealed that the body length of fish caught was between 275mm and 610mm and the weight ranged between 296 and 4100g. The ratio between males and females in absolute measures was 42:18, the value of a sex ratio index was 2,333. The fish caught belonged to age groups between II. and VII. and also group XI. The ratio between body length and the diagonal radius of a scale is linear and can be defined as y = 0,3424 x ? 4,4824. The relationship between weight and the body length can be defined as an equation log w = 2,9324 x ? 4,6064 . log.1. The average value of the Fulton condition coefficient is K = 1,67. The value of Bank start is 37,2 mm.