metabolism
- Increased glucocorticoid concentrations in early life cause mitochondrial inefficiency and short telomeres
Summary: Experimental simulation of natural stressful developmental conditions reveals that glucocorticoid hormones induce telomere shortening by decreasing mitochondrial efficiency without altering oxidative stress, suggesting that telomeres are costly to maintain.
- Reduced lactate dehydrogenase activity in the heart and suppressed sex hormone levels are associated with female-biased mortality during thermal stress in Pacific salmon
Summary: Reduced lactate dehydrogenase activity in the heart and lower circulating sex hormones are linked to female-biased mortality during thermal stress in Pacific salmon.
- Flight activity and glycogen depletion on a low-carbohydrate diet
Summary: On a low-carbohydrate diet, flies experience a reduction in glycogen stores yet increase flight activity without changing rates of glycogen depletion.
- Reduced exploration capacity despite brain volume increase in warm-acclimated common minnow
Highlighted Article: In fish, thermal metabolic compensation in response to warming under predicted climate change scenarios may alter brain morphology and cognition, potentially causing fitness impairment.
- The effects of elevated temperature and PCO2 on the energetics and haemolymph pH homeostasis of juveniles of the European lobster, Homarus gammarus
Summary: Energetic limitations of early juvenile development result in alterations to haemolymph buffering capacity in juvenile lobster exposed to elevated temperature and PCO2.
- The control of metabolic traits by octopamine and tyramine in invertebrates
Summary: The monoamines octopamine and tyramine play a pivotal role in the control of metabolism in invertebrates by regulating both energy intake and energy expenditure.
- 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.