Behavioural thermoregulation and bioenergetics of riverine smallmouth bass associated with ambient cold‐period thermal refuge

摘要: Smallmouth bass in thermally heterogeneous streams may behaviourally thermoregulate during the cold period (i.e., groundwater temperature greater than river water temperature) by inhabiting warm areas stream that result from high influence or springs. Our objectives were to determine movement of smallmouth (Micropterus dolomieu) use thermal refuge and project differences growth consumption among exhibiting different thermal-use patterns. We implanted radio transmitters 29 captured Alley Spring on Jacks Fork River, Missouri, USA, winter 2012. Additionally, archival tags a subset nine fish. Fish tracked using telemetry monthly January 2012 through 2013. The greatest upstream was 42.5 km, downstream 22.2 km. Most tagged fish (69%) departed when daily maximum first exceeded spring (14 °C) increased discharge. Bioenergetic modelling predicted 350 g migrating used cold-period would grow 16% slower at same level as did not seek refuge. Contrary bioenergetics models, extrapolation scope results suggested 29% more with little influence. contradict previous findings are relatively sedentary, provide information about potential cues for migratory behaviour, give insight managers regarding systems.