life history
- Maternal glucocorticoids promote offspring growth without inducing oxidative stress or shortening telomeres in wild red squirrels
Summary: Experimental increases in glucocorticoids in breeding female North American red squirrels affects offspring postnatal growth but not levels of oxidative damage and antioxidants or telomere lengths.
- 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.
- Ontogeny of effective mechanical advantage in eastern cottontail rabbits (Sylvilagus floridanus)
Editors' Choice: Hindlimb muscle leverage declines during growth in cottontail rabbits, likely promoting increased locomotor performance during the precarious juvenile period of life history.
- Developmental plasticity in metabolism but not in energy reserve accumulation in a seasonally polyphenic butterfly
Summary: The switch between diapause and direct development results in developmental pre-diapause plasticity in life history and metabolism but not in reserve accumulation in a seasonally polyphenic butterfly.
- Understanding diversity in oxidative status and oxidative stress: the opportunities and challenges ahead
Summary: This Commentary highlights the distinction between biochemical and biological definitions of oxidative stress, discusses issues to consider when designing experiments to investigate oxidative stress, and proposes the ‘redox signalling hypothesis’ of life history.
- Prior reproduction alters how mitochondria respond to an oxidative event
Summary: Interactions among oxidative stressors are predicted to impact performance. Reproduction prior to an oxidative stressor improved liver mitochondria coupling, while skeletal muscle mitochondrial density decreased.
- Exogenous stress hormones alter energetic and nutrient costs of development and metamorphosis
Summary: The energetic and nutrient costs of glucocorticoid-accelerated development alter fitness trade-offs across life stages.
- Oxidative ecology of paternal care in wild smallmouth bass, Micropterus dolomieu
Summary: The complex role of oxidative stress as a potential physiological mediator of life-history trade-off decisions for paternal smallmouth bass.
- Exercise training reveals trade-offs between endurance performance and immune function, but does not influence growth, in juvenile lizards
Summary: Forcing allocation to performance with exercise training revealed sex-specific trade-offs in juvenile green anole lizards.
- Phylogeny, environment and sexual communication across the Drosophila genus
Summary: We explore the relationship between life history, phylogeny and social communication of the Drosophila genus.