Maria Faldborg Steinhausen

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The mechanism underlying the decrease in aerobic scope in fish at warm temperatures is not fully understood and is the focus of this research. Our study examined oxygen uptake and delivery in resting, swimming and recovering sockeye salmon while water temperature was acutely increased from 15 degrees C to 24 degrees C in 2 degrees C h(-1) increments. Fish(More)
Oxygen consumption and tail beat frequency were measured on saithe (Pollachius virens) and whiting (Merlangius merlangus) during steady swimming. Oxygen consumption increased exponentially with swimming speed, and the relationship was described by a power function. The extrapolated standard metabolic rates (SMR) were similar for saithe and whiting, whereas(More)
Telemetry studies have provided unprecedented information about the activity, spatial ecology and energetics of free-swimming fishes (Lucas & Baras, 2000; Cooke et al., 2004). These studies, however, require tagging of fishes with radio or acoustic transmitters. The effects of these transmitters are often assumed to be negligible as far as the(More)
While it is well known that O2 is directly removed from the water by skin and gill tissues of fish, the mismatch between O2 removal from water (O2 uptake; $$\dot{V}{\text{O}}_{ 2}$$ V ˙ O 2 ) and the O2 delivered to tissues by the primary circulation (O2 consumption; $$\dot{V}{\text{aO}}_{ 2}$$ V ˙ aO 2 ) has never been measured directly. Using data from(More)
This study reports the first results on telemetry of caudal differential pressure during spontaneous swimming activity in cod Gadus morhua and demonstrates that tail-beat pressure may be used as a predictor of activity and swimming costs of free-swimming cod. Tail-beat pressure was monitored using a differential pressure sensor on the caudal peduncle of cod(More)
The effect of Hb-I* phenotype on white muscle lactate dehydrogenease (LDH, E. C. 1.1.1.27) activity and buffering capacity was studied in Atlantic cod (Gadus morhua), acclimated and measured at temperatures near their behavioral temperature preference. It was hypothesized that these conditions would optimize biochemical processes but no difference was found(More)
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