Indicative value of anglers' records for fish assemblage evaluation in a reservoir (Case study Brno reservoir, Czech Republic)

0370413 - ÚBO 2012 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Adámek, Zdeněk - Jurajda, Pavel
Indicative value of anglers' records for fish assemblage evaluation in a reservoir (Case study Brno reservoir, Czech Republic).
The angler in the environment: social, economic, biological, and ethical dimensions. Proceedings of the fifth world recreational fishing conference. Bethesda: American Fisheries Society, 2011 - (Beard Jr., T.; Arlinghaus, R.; Sutton, S.), s. 345-353. American Fisheries Society Symposium, 75. ISBN 978-1-934874-24-0. ISSN 0892-2284.
[World Recreational Fishing Conference /5./. Dania Beach (US), 10.11.2008-13.11.2008]
Grant CEP: GA MŠMT LC522
Výzkumný záměr: CEZ:AV0Z60930519
Klíčová slova: recreational fisheries * angling * anglers' records * reservoir * fish assemblage * water quality
Kód oboru RIV: GL - Rybářství

The deterioration of water quality in past decades was presented in considerably increasing ratio between non-predatory and predatory fishes biomass in anglers' catches at the Brno Reservoir. In 1991 – 2007, cyprinids prevailed in anglers´ catches with the mean annual angling effort corresponding 55,063 angling trips (man-day performance). The mean annual angling yield reported in anglers´ records amounted to 32,613 kg (26,236 fish individuals), which corresponds to an individual angling yield of 148 kg per ha. Thus, the yearly angling yield from the Brno reservoir de facto exploits the natural productivity of this type of reservoirs (250 m a.s.l.) which usually corresponds to 150 -200 kg per ha.
Trvalý link: http://hdl.handle.net/11104/0204223