stress
- Acute and chronic stress prevents responses to pain in zebrafish: evidence for stress-induced analgesia
Summary: Exposure of zebrafish to acute or chronic stress prior to fin clipping prevents behavioural changes normally seen after fin clip; naloxone treatment prevented this effect, demonstrating stress-induced analgesia.
- Octopamine mobilizes lipids from honey bee (Apis mellifera) hypopharyngeal glands
Summary: Octopamine induces the release of lipids from tissue stores in many insects and can also induce lipid mobilization from honey bee hypopharyngeal glands.
- Experimental manipulation of perceived predation risk and cortisol generates contrasting trait trajectories in plastic crucian carp
Summary: The effect of perceived predation risk and cortisol manipulation on plastic anti-predator traits in crucian carp.
- Rapid cold hardening: ecological relevance, physiological mechanisms and new perspectives
Summary: Rapid cold hardening allows ectotherms to quickly enhance their cold tolerance. Here, we review the ecological relevance, underlying mechanisms and future research directions for this important process.
- Short-term dehydration influences baseline but not stress-induced corticosterone levels in the house sparrow (Passer domesticus)
Summary: Elevated baseline corticosterone levels induced by water restriction may have critical consequences on several major life-history traits such as energy budget, mobility and potential responses to predators.
- Investigating the relationship between corticosterone and glucose in a reptile
Summary: In situ and manipulation experiments in wandering gartersnakes show plasma glucose is elevated during acute stress, but corticosterone concentrations are not tightly correlated with glucose concentrations.
- Tissue-specific expression of 11β-HSD and its effects on plasma corticosterone during the stress response
Summary: Peripheral enzymes are primarily responsible for enzymatic modulation of the glucocorticoid stress response in songbirds.
- Rapid cold hardening protects against sublethal freezing injury in an Antarctic insect
Summary: Rapid cold hardening has a well-established role in preventing death from cold; present data show it also protects against non-lethal freezing injury in a freeze-tolerant Antarctic insect.
- Strain transformation: enhancement of invertebrate memory in a new rearing environment
Summary: A change in rearing environment results in the establishment of a lab-bred Lymnaea stagnalis strain with an enhanced ability to form memory as well as heightened resilience to physiological stressors.
- Repeated stimulation of the pituitary–adrenal axis alters offspring phenotype of a wild passerine
Summary: Developmental stress has negative effects on pied flycatcher offspring growth and physiology, but may have short-term benefits on performance by enhancing antipredator behaviour.