Research on the reproduction biology of perch (Perca fluviatilis L.) in reservoirs and newly created lakes

The distribution of egg strands of perch and factors affecting this distribution were studied in Chabařovice Lake (years 2007-2010 and 2012) and in Římov Reservoir (2007 and 2011) using boat observation and SCUBA divers. In total, 206 dives in duration of c. 60 minutes each were performed during the perch spawning period. In case of Chabařovice Lake, factors influencing the depth distribution of egg strands were identified as waves, temperature, duration of the daylight period and light attenuation in the water column (Fig. 1). Factors influencing the selection of spawning sites were identified as wind inducing current, internal seiches and temperature instability of the water column. In case of Římov Reservoir, factors influencing the depth distribution of egg strands were identified as presence of appropriate spawning substrates and light attenuation in the water column (Fig. 1). Factors influencing the selection of spawning sites were identified as presence of littoral vegetation, especially in sheltered bays.

Research outputs:

Čech, M., Peterka, J., Říha, M., Vejřík, L., Jůza, T., Kratochvíl, M., Draštík, V., Muška, M., Znachor, P., Kubečka, J. (2012). Extremely shallow spawning of perch (Perca fluviatilis L.): the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water. Knowledge and Management of Aquatic Ecosystems 406/9: 1-12.

Čech, M., Vejřík, L., Peterka, J., Říha, M., Muška, M., Jůza, T., Draštík, V., Kratochvíl, M., Kubečka, J. (2012). The use of artificial spawning substrate in order to understand the factors influencing the spawning site selection, depth of egg strands deposition and hatching time of perch (Perca fluviatilis L.). Journal of Limnology 71/1: 170-179.

Čech, M., Peterka, J., Říha, M., Muška, M., Hejzlar, J., Kubečka, J. (2011). Location and timing of the deposition of egg strands by perch (Perca fluviatilis L.): the roles of lake hydrology, spawning substrate and female size. Knowledge and Management of Aquatic Ecosystems 403/8: 1-12.

Čech M., Peterka J., Říha M., Draštík V., Kratochvíl M., Kubečka J. (2010). Deep spawning of perch (Perca fluviatilis, L.) in the newly created Chabařovice Lake, Czech Republic. Hydrobiologia 649: 375-378.

Čech, M., Peterka, J., Říha, M., Jůza, T., Kubečka, J., (2009). Distribution of egg strands of perch (Perca fluviatilis L.) with respect to depth and spawning substrate. Hydrobiologia 630, 105-114.