Počet záznamů: 1
Winter activity of common bream (Abramis brama L.) in a European reservoir
- 1.0489656 - ÚBO 2019 RIV US eng J - Článek v odborném periodiku
Jurajda, Pavel - Roche, Kevin Francis - Halačka, Karel - Mrkvová, Markéta - Zukal, Jan
Winter activity of common bream (Abramis brama L.) in a European reservoir.
Fisheries Management and Ecology. Roč. 25, č. 3 (2018), s. 163-171. ISSN 0969-997X. E-ISSN 1365-2400
Grant CEP: GA ČR(CZ) GBP505/12/G112
Institucionální podpora: RVO:68081766
Klíčová slova: cyprinid behaviour * fish metabolism * predation risk * reservoir fisheries * telemetry * thermocline
Obor OECD: Fishery
Impakt faktor: 1.667, rok: 2018
As temperatures drop and fish metabolism slows, cyprinids are generally assumed to form dense, static shoals or migrate to suitable sites up tributaries to reduce predation risk. Using telemetry, common bream Abramis brama (L.) were observed to remain active and (presumably) foraged throughout winter in an area in the middle of an 8‐m‐deep valley reservoir coinciding with a 3–5 m zone of warmer, oxygenated water below an inverse thermocline. Tagged bream appeared to avoid cold, shallow zones (<1.5 m) at the inlet and banks and the deepest zone (5–8 m) near the dam/outlet, possibly due to poor food availability. Under certain conditions, bream populations showed higher levels of winter activity (and feeding) than previously assumed, with implications for both reservoir fisheries management and future studies assessing cyprinid behaviour, energy budgets and diet in lakes and reservoirs.
Trvalý link: http://hdl.handle.net/11104/0284028
Počet záznamů: 1