Refine
Has Fulltext
- no (28)
Document Type
- Article (28) (remove)
Language
- English (28)
Is part of the Bibliography
- yes (28)
Keywords
- animal personality (8)
- giving-up density (4)
- landscape of fear (4)
- coexistence (3)
- optimal foraging (3)
- rodents (3)
- HIREC (2)
- Inter-individual differences (2)
- Movement ecology (2)
- Personality (2)
- behavioural syndrome (2)
- exploratory-behavior (2)
- fitness consequences (2)
- foraging (2)
- functional traits (2)
- individual differences (2)
- personality (2)
- urbanization (2)
- 454 pyrosequencing (1)
- Adolescence (1)
- Animal personality (1)
- Bayesian standard ellipse (1)
- Behavior (1)
- Breeding strategies (1)
- Cheirogaleidae (1)
- Chiroptera (1)
- Coexistence (1)
- Coping styles (1)
- Dip test (1)
- Ecological niche (1)
- Energy expenditure (1)
- European hare (1)
- Faecal glucocorticoid metabolites (1)
- Functional aging (1)
- Fur (1)
- Grip strength (1)
- Habitat use (1)
- Humans (1)
- Humid forest (1)
- Immunity (1)
- Infanticide (1)
- Intraspecific competition (1)
- Invasion ecology (1)
- Invasive species (1)
- Learning (1)
- Life history (1)
- Life history strategies (1)
- Menarche (1)
- Metabolism (1)
- Microcebus berthae (1)
- Microcebus murinus (1)
- Microtus arvalis (1)
- Myodes glareolus (1)
- Myodes voles (1)
- Natural population (1)
- Neoromicia (1)
- ODBA (1)
- Physiology (1)
- Pipistrellus (1)
- Primates (1)
- Rattus norvegicus (1)
- Rattus rattus (1)
- Risk taking (1)
- Rodent (1)
- Rodents (1)
- Sarcopenia (1)
- Scotophilus (1)
- Sex difference (1)
- Sexual conflict (1)
- Sexual selection (1)
- Small mammal (1)
- Stable carbon isotope (1)
- Stable nitrogen isotope (1)
- Stress (1)
- Tamias striatus (1)
- Trait interaction (1)
- activity (1)
- animal behavior (1)
- animal cognition (1)
- animal movement (1)
- anthropogenic environment (1)
- apodemus-agrarius (1)
- associative learning (1)
- attraction-avoidance (1)
- automated radio telemetry (1)
- avian personalities (1)
- bank voles (1)
- behavioral flexibility (1)
- behavioral type (1)
- behavioural adjustment (1)
- behavioural flexibility (1)
- behavioural reaction norm (1)
- biodiversity (1)
- body mass (1)
- cascading effects (1)
- community structure (1)
- competition (1)
- competitive ability (1)
- condition-dependent mortality (1)
- congeneric species (1)
- coping styles (1)
- density dependence (1)
- ecological niches (1)
- environmental change (1)
- exploitation (1)
- fast and slow learner (1)
- fine-scale interactions (1)
- fitness (1)
- foraging behaviour (1)
- functional senescence (1)
- hibernation (1)
- home range (1)
- individual niche specialization (1)
- individual reaction norm (1)
- individual variability (1)
- individual variation (1)
- individual-based model (1)
- inter-specific interactions (1)
- intra-specific trait variation (1)
- jumping spider (1)
- life history (1)
- life-history evolution (1)
- lifespan (1)
- migration (1)
- model (1)
- movement behaviour (1)
- movement ecology (1)
- mustelid predation (1)
- natal dispersal (1)
- natural-selection (1)
- neophilia (1)
- neophobia (1)
- novelty (1)
- occurrence estimates (1)
- pace-of-life syndrome (1)
- parentage (1)
- patch use (1)
- patch use; (1)
- perceived predation risk (1)
- personality-traits (1)
- predation risk (1)
- reproductive success (1)
- resource (1)
- risk allocation (1)
- risk-reward tradeoff (1)
- rodent (1)
- rural populations (1)
- sex difference (1)
- small mammals (1)
- social environment (1)
- social information (1)
- speed-accuracy trade-off (1)
- stable carbon (1)
- stable nitrogen (1)
- step-selection function (1)
- stress (1)
- temperament (1)
- torpor (1)
- trade-offs (1)
- trait (1)
- variation (1)
- voles clethrionomys-glareolus (1)
Institute
1. Given fundamental energetic trade-offs among growth, maintenance and reproduction, individual differences in energy saving should have consequences for survival and reproductive success. Many endotherms use periodic heterothermy to reduce energy and water requirements and individual variation in heterothermy should have fitness consequences. However, attempts to disentangle individual- and population-level variation in heterothermy are scarce. 2. Here, we quantified patterns of heterothermy of 55 free-ranging eastern chipmunks (Tamias striatus), food-hoarding hibernators. Over five hibernation periods, we obtained a total of 7108 daily individual heterothermy indices (median: 118 per individual). 3. Based on an individual reaction norm approach, we found that the use of heterothermy was repeatable and varied among individuals of the same population under similar environmental conditions. This among-individual variation had consequences for winter survival and reproductive success. Individuals using less heterothermy at the beginning of the winter had decreased survival in resource-rich but not in resource-poor years and higher reproductive success in the subsequent breeding season. 4. These results support the hypothesis that fluctuating selection maintains heterothermic diversity and suggest that individualized ecophysiology can contribute to a more thorough understanding of the evolution of energy-saving strategies in endotherms.