respirometry
- Oxygen consumption of drift-feeding rainbow trout: the energetic tradeoff between locomotion and feeding in flow
Editors' Choice: Drift-feeding rainbow trout choose between swimming and refuging depending on the cost and success rate of prey capture across flow velocities.
- Swimming in unsteady water flows: is turning in a changing flow an energetically expensive endeavor for fish?
Summary: The measurement of the costs of swimming in wave-surge type flows revealed minimal costs for acceleration but large costs for turning in a pectoral-fin swimming reef fish.
- Interspecific variation in hypoxia tolerance and hypoxia acclimation responses in killifish from the family Fundulidae
Summary: Substantial interspecific variation and plasticity of hypoxia tolerance exist across fundulid killifish and are only fully appreciated by considering multiple indices of tolerance.
- The utility and determination of Pcrit in fishes
Summary: We outline why Pcrit is a useful and informative comparator of hypoxia tolerance in fishes, provided it is determined using standardized respirometry methods and sound statistical approaches.
- Finding the peak of dynamic oxygen uptake during fatiguing exercise in fish
Summary: Accurately estimating peak oxygen uptake as a fish approaches fatigue in a swimming test must account for oxygen uptake being dynamic despite a constant, imposed workload.
- Turtles maintain mitochondrial integrity but reduce mitochondrial respiratory capacity in the heart after cold acclimation and anoxia
Summary: Inhibition of mitochondrial respiration rate and production of reactive oxygen species during cold acclimation and anoxia, while preserving mitochondrial content and morphology, is central to the anoxia tolerance of freshwater turtle hearts.
- Energetics and behavior of coral reef fishes during oscillatory swimming in a simulated wave surge
Summary: The relationship between swimming mode, turning behavior and energetic costs in coral reef fishes is examined for station-hold swimming in wave-induced water motions.
- Distinct metabolic adjustments arise from acclimation to constant hypoxia and intermittent hypoxia in estuarine killifish (Fundulus heteroclitus)
Summary: Fish acclimated to constant hypoxia induced metabolic depression, whereas fish acclimated to intermittent hypoxia maintained routine O2 demands, suggesting that distinct physiological mechanisms can be used to cope with different patterns of hypoxia exposure.
- Hyperoxia increases maximum oxygen consumption and aerobic scope of intertidal fish facing acutely high temperatures
Highlighted Article: Hyperoxia increases maximum oxygen uptake and metabolic scope in intertidal fish facing acutely high temperatures but does not increase upper thermal tolerance limits.