metabolism
- Facultative hyperthermia during a heatwave delays injurious dehydration of an arboreal marsupial
Highlighted Article: When it is hot outside, a possum can save water and avoid dangerous levels of dehydration by letting its body temperature rise with the heat.
- Extreme blood-boosting capacity of an Antarctic fish represents an adaptation to life in a sub-zero environment
Editors' Choice: Extreme splenic blood-boosting strategy provides bald notothens with an extraordinary facultative aerobic scope that enables an active lifestyle in sub-zero marine environments.
- Prolonged survival out of water is linked to a slow pace of life in a self-fertilizing amphibious fish
Summary: Intrinsically low metabolic rates increase survival and fitness of an amphibious fish when access to water is limited; there is no apparent cost when water is abundant.
- Nitrite-induced reductions in heat tolerance are independent of aerobic scope in a freshwater teleost
Summary: Nitrite is a pervasive pollutant in aquatic habitats, which affects both heat tolerance and aerobic scope in juvenile European carp (Cyprinus carpio).
- Developmental delay in shivering limits thermogenic capacity in juvenile high-altitude deer mice (Peromyscus maniculatus)
Summary: Postnatal development of shivering thermogenesis is initially delayed in high-altitude deer mice; the highly aerobic muscle phenotype and superior thermogenic capacity characteristic of adults does not mature until after weaning.
- Differential glycogen utilization in shark acid- and base-regulatory gill cells
Summary: Shark gill acid–base regulatory cells contain large intracellular glycogen stores that are differentially utilized and replenished during acid–base stress.
- Severe thermoregulatory deficiencies in mice with a deletion in the titin gene TTN
Summary: Mice with a small deletion in the titin gene TTN exhibit severe thermoregulatory deficiencies and have lower metabolic rates than other size-matched rodents.
- Immune challenge-induced oxidative damage may be mitigated by biliverdin
Summary: In quail, plasma levels of oxidative damage and biliverdin concentration are negatively correlated, consistent with a localized antioxidant function of biliverdin.
- 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.
- Do squid breathe through their skin?
Summary: Contrary to a 30-year-old well-regarded hypothesis, squid do not obtain oxygen across their skin to supply underlying tissues.