... the bill, given that body condition influences the surface temperature of another body region (the eye region). We measured the surface temperature of the bills of song sparrows ( Melospiza melodia ) before, during and after handling by an observer at 37°C ambient temperature. We fed five birds...

... mass. Vespertilio murinus Energetic trade-off Body condition Spermatogenesis Heterothermy Living in seasonal, often unpredictable environments is challenging for many animals. The optimization of assimilated energy allocation among competing life-history traits is central...

... glucocorticoids, oxidative stress, immune function or body condition represent a cost of performing offspring care and shape subsequent fitness. We use a 4 year dataset collected in free-living cooperatively breeding superb starlings ( Lamprotornis superbus ), a species in which parental and alloparental care...

... metabolic rate indicated by high-speed transit to depth and negative buoyancy of long-finned pilot whales implies a costly diving strategy compared with that in other deep-diving toothed whales. Swimming kinematics Body condition Cetacean Deep-diving marine mammals Foraging strategy Globicephala...

... in the plains spadefoot toad ( Spea bombifrons ), a species in which diet affects the developmental emergence of species recognition and body condition affects the expression of adult mating preferences. To do so, we manipulated the diet of juveniles for 6 weeks following metamorphosis and collected...

.... This effect could occur by minimising the need for individual vigilance and reducing stress through social buffering. However, this effect has proved difficult to quantify. We examined the effect of shoaling on metabolism and body condition in the gregarious damselfish Chromis viridis . Using a novel...

... phases in these animals. Implementation of this approach using longer-duration tags could be used to track longitudinal changes in body density and lipid store body condition of free-ranging cetaceans. * Author for correspondence ( [email protected] ) Competing interests The authors...

... mating season. We asked whether variation in adrenal sensitivity to adrenocorticotropic hormone (ACTH) explains why glucocorticoid responses to capture stress vary with sex, season and body condition in red-sided garter snakes. We measured glucocorticoids at 0, 1 and 4 h after injection with ACTH (0.1 IU...

...://creativecommons.org/licenses/by/3.0 ), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Summary: A step-wise filtering method to detect buoyancy changes in drift diving pinnipeds. Body condition Marine mammal Elephant...

... with clutch oviposition sequence, or mammalian or avian predation attempts. Instead, autumn emergence from the nest was associated with the direct mortality threat of predation by sarcophagid fly larvae. Body condition and righting response, measured as proxies of hatchling fitness, did not differ between...

... spells. This study demonstrates the relevance of using mechanistic energetics modelling and body condition analyses to understand and predict the impact of extreme climatic events on animal energy balance and winter survival probabilities. We defined a cold spell as a period of at least six consecutive...

... foraging at sea. Mature females may lose as much as 50% of their body mass, mostly in lipid stores, during the breeding season due to fasting and lactation. When departing to sea, post-breeding females are negatively buoyant, and the relative change in body condition (i.e. density) during the foraging trip...

...Camille Duval; Phillip Cassey; Ivan Mikšík; S. James Reynolds; Karen A. Spencer SUMMARY A relationship has been suggested between eggshell colour and female body condition based on the opposing antioxidant properties of the two main eggshell pigments: the antioxidant biliverdin (blue–green...

... consumption body condition satin bowerbird Trait variation is fundamental to the concept of evolution by natural selection. In recent years there has been considerable interest among ecological and evolutionary physiologists about how whole-animal performance differs among individuals, populations...

... measurements determined by isotope dilution, and therefore have the potential to track changes in body condition of a wide range of freely diving animals. Gliding during ascent and descent clearly increased and stroke rate decreased when buoyancy manipulations aided the direction of vertical transit...

...(AS), which amplifies protein and functional diversity. In spite of the likely consequences for organismal biology, little is known about how AS varies among individuals or responds to body condition, environmental variation or extracellular signals in general. Here we show that evolutionarily conserved...

... petrels differ greatly in body size( Barbraud and Jouventin, 1998 ),indices of body condition were calculated separately for each sex. Body condition was calculated as the residual from a reduced major axis regression of body mass against structural body size( Green, 2001 ). To obtain one variable...

... H to estimate V̇ O 2 in free-ranging animals. Using the relationship between the oxygen pulse (OP, the amount of oxygen used per heart beat) and an index of body condition (or nutritional index, NI), a relationship between f H and V̇ O 2 was established for resting king penguins exposed to a variety...