- A radical shift in perspective: mitochondria as regulators of reactive oxygen species
Summary: Mitochondria are often considered to be a source of harmful reactive oxygen species. Here, we explain how they may behave as regulators of hydrogen peroxide, an important ROS in cellular function.
- Swimming and diving energetics in dolphins: a stroke-by-stroke analysis for predicting the cost of flight responses in wild odontocetes
- Both thyroid hormone levels and resting metabolic rate decrease in African striped mice when food availability decreases
Summary: Seasonal changes occur in the relationship between thyroid hormone levels and resting metabolic rate in free-living African striped mice: a negative relationship exists in the moist season but not the dry season.
- Assessing hydrodynamic space use of brown trout, Salmo trutta, in a complex flow environment: a return to first principles
Summary: New techniques are used to experimentally demonstrate that energy conservation strategies play a key role in brown trout space use.
- Crouching to fit in: the energetic cost of locomotion in tunnels
Summary: The energetic cost of locomotion in a simulated tunnel exceeds that of overground locomotion in two semi-fossorial mammal species (ferrets and degus).
- Preferred gait and walk–run transition speeds in ostriches measured using GPS-IMU sensors
- Shoaling reduces metabolic rate in a gregarious coral reef fish species
Highlighted Article: Group living reduces metabolic rate in a shoaling damselfish species, while isolation reduces body condition. Social isolation due to environmental disturbance may therefore have physiological consequences for gregarious species.
- The high cost of reproduction in sea otters necessitates unique physiological adaptations
Highlighted Article: Female sea otters must manage high pup rearing costs on top of exceptional baseline energy demands; to accomplish this task, they exhibit distinct metabolic changes during key reproductive stages.
- The speed and metabolic cost of digesting a blood meal depends on temperature in a major disease vector
Summary: Respirometry reveals that higher environmental temperatures reduce the metabolic costs of digestion but hasten starvation, and behavioral measurements show that tsetse flies switch between thermal optima throughout feeding cycles.