Ichthyofauna of Wrocław - the Odra River, its tributaries and the selected city reservoirs.

The ichthyofauna of the Odra River, its major tributaries (Olawa, Widawa, Bystrzyca, Śleza) and selected reservoirs (sand and clay pits, city park ponds, recreational reservoirs, city moat) within the city of Wroclaw is described on the basis of data obtained in our own studies (electrofishing and net-catching), quality control catches of the Polish Angling Association, analysis of stocking registers, control and analysis of angling inquiries and interviewing anglers in 1980-2010. Forty six fish and lamprey species were recorded: 42 in the Odra River, and 41 in its tributaries. Twenty eight species were recorded from the city reservoirs; they represented euryoecious and stagnophilous ecological groups. The study area holds nine species which are legally protected in Poland (Lampetra planeri, Acipenser oxirynchus, Gobio albipinnatus, Rhodeus sericeus, Eupallasella percnurus, Cobitis taenia, Sabanejewia baltica (=aurata), Misgurnus fossilis, Barbatula barbatula) and five species regarded as endangered in the country (Barbus barbus, Vimba vimba, Chondrostoma nasus, Hucho hucho, Salmo salar). Eleven species occurring in the water courses and reservoirs of Wroclaw are protected within the EU Habitats Directive (92/43/EWG). Ten species introduced accidentally or on purpose occur in the city. Despite the high anthropopressure, including intensive angling, the Wroclaw waters still hold diverse, and the Odra River itself - even rich - fish communities.