Visbestandopnames in Vlaamse beken en rivieren afgevist in het kader van het ‘Meetnet Zoetwatervis’ 2007

In this document we report about the surveys performed within the framework of the freshwater monitoring network. We assessed the fish assemblages in 149 sites in nine different river basins. Among the rivers we fished in the Dijle , the Leie and the Zenne . Fish assemblage data were obtained by electrofishing using a 5 kW generator with an adjustable output voltage of 300 to 500 V and a pulse frequency of 480 Hz. The number of electric fishing devices and the number of hand-held anodes used was 2 except when the river was smaller than 1 m. We sampled also fish using double fyke nets (type 120... Mehr ...