Trials with Ultrasonic Tags for the Study of Coarse Fish Behaviour and Movements around Power Station Outfalls

Seasonal activities of female barbelBarbus barbus(L.) in the River Ourthe (Southern Belgium), as revealed by radio tracking

“…Yeager (1982), tracking bass hybrids in Florida, also detected major habitat changes during periods of rising water. Langford (1981) observed similar behaviour of bream flushed downstream during sudden flow increase following heavy rainfalls. We believe that barbels moved down-Stream because they could not maintain their position in residence areas close to rapid zones under high discharge conditions or that the foraging energetic cost was too high, specially when considering the low water temperature during this period (< 10 O C ) .…”

Seasonal movements with shifts in lateral and longitudinal habitat use by common bream, Abramis brama, in a heavily modified lowland river

“…Common bream is described by Backiel and Zawisza (1968) as semi-migratory (when occupying unmodified habitats), making long migrations in the spring and autumn from the Black, Caspian and Azov seas of up to 100 km from brackish feeding areas in the lower reaches and deltas of large rivers. Langford (1974Langford ( , 1981, and Langford et al (1979) used telemetry to observe common bream in a discreet 13.5-km reach of the River Witham (between Lincoln and Bardney Lock, upstream of the area of study here) and found that they moved 400 m to 8 km over periods of 2-5 days, whilst Whelan (1983) found common bream in the relatively unmodified River Suck, Ireland, to move up to 56 km during a 5-year markrelease-recapture study, but the timescales for such movements are unclear.…”