A5042850332- Animal Behavior and Reproduction
- Amphibian and Reptile Biology
- Avian ecology and behavior
- Plant and animal studies
- Wildlife Ecology and Conservation
- Physiological and biochemical adaptations
- Animal Vocal Communication and Behavior
- Animal Behavior and Welfare Studies
- Insect and Arachnid Ecology and Behavior
- Species Distribution and Climate Change
- Marine animal studies overview
- Neuroendocrine regulation and behavior
- Bird parasitology and diseases
- Bat Biology and Ecology Studies
- Epigenetics and DNA Methylation
- Turtle Biology and Conservation
- Stress Responses and Cortisol
- Evolutionary Psychology and Human Behavior
- Marine and fisheries research
- Animal Nutrition and Physiology
- Impact of Light on Environment and Health
- Fish Ecology and Management Studies
- Sex and Gender in Healthcare
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Ecology and Vegetation Dynamics Studies
Cornell University
2016-2025
Cornell Lab of Ornithology
2017-2025
Allegheny College
2024
American Museum of Natural History
2024
West Chester University
2024
University of Arizona
2023
University of Colorado Boulder
2008-2017
Princeton University
2004-2013
Max Planck Institute for Ornithology
2008-2013
Yale University
2010
Significance The advancement of breeding behavior is a well-documented response to changing climate conditions, as timing reproduction with resource availability critical for success in many species. However, the relationship between cues that prompt and can become decoupled, reducing success. Tree swallows have advanced warming springs, but now chicks are exposed twice risk inclement weather resulting high rates chick mortality. Mass mortality events appear be driven by decreasing insect at...
The term "stress" is used to describe important phenomena at multiple levels of biological organization, but finding a general and rigorous definition the concept has proven challenging. Current models in behavioral literature emphasize cognitive aspects stress, which said occur when threats organism are perceived as uncontrollable and/or unpredictable. Here we adopt perspective systems biology take step toward stress by unpacking light control theory. Our goal clarify so facilitate...
Glucocorticoid hormones (CORT) are predicted to promote adaptation variable environments, yet little is known about the potential for CORT secretion patterns respond selection in free-living populations. We assessed heritable variation underlying differences hormonal phenotypes using a cross-foster experimental design with nestling North American barn swallows ( Hirundo rustica erythrogaster ). Using bivariate animal model, we partitioned variance baseline and stress-induced concentrations...
Glucocorticoid hormones are important regulators of metabolic processes, and the behavioral physiological responses to stressors. Within-population variation in circulating glucocorticoids has been linked with both reproductive success survival, but presence direction relationships vary. Although conceptual models suggest potential for interactions between glucocorticoid secretion under acute stress non-acute contexts influence phenotype fitness, very little is known about or implications...
Abstract Individuals often vary markedly in their ability to cope with stressors, but the drivers of this variation remain poorly understood. Many studies have tested relationships among individual glucocorticoid levels and response challenges—often finding inconsistent patterns; however, few addressed whether capacity terminate stress through negative feedback is associated resilience. While conceptual models predict that interactions different components hypothalamic–pituitary–adrenal...
Glucocorticoid (GC) hormones are important phenotypic mediators across vertebrates, but their circulating concentrations can vary markedly. Here we investigate macroevolutionary patterning in GC levels tetrapods by testing seven specific hypotheses about variation and evaluating whether the supported reveal consistent patterns evolution. If selection generally favors "supportive" role of GCs responding effectively to challenges, then baseline and/or stress-induced may be higher challenging...
The ability to recognize and respond the alarm calls of heterospecifics has previously been described only in species with vocal communication. Here we provide evidence that a non-vocal reptile, Galápagos marine iguana (Amblyrhynchus cristatus), can eavesdrop on call mockingbird (Nesomimus parvulus) anti-predator behaviour. Eavesdropping complex heterospecific communications demonstrates remarkable degree auditory discrimination species.
It has been well-established that there is variation in the strength and direction of relationship between circulating glucocorticoids (GCs) fitness. When studies demonstrate such or GC–fitness unexpected, results are often attributed to context-dependency. However, descriptors context can be vague (e.g., "environmental context") few explicitly test how optimal hypothalamic–pituitary–adrenal (HPA) axis response stressors varies across specific contexts. Although existing hypotheses create a...
Rates of human-induced environmental change continue increasing with human population size, potentially altering animal physiology and negatively affecting wildlife. Researchers often use glucocorticoid concentrations (hormones that can be associated stressors) to gauge the impact anthropogenic factors (e.g. urbanization, noise light pollution). Yet, no general relationships between glucocorticoids have emerged. Given number recent studies reporting baseline stress-induced corticosterone...
Phenotypic flexibility is a central way that organisms cope with challenging and changing environments. As endocrine signals mediate many phenotypic traits, heritable variation in hormone levels, or their context-dependent flexibility, could present an important target for selection. Several studies have estimated the heritability of circulating glucocorticoid levels under acute stress conditions, but little known about potential either baseline rapid to evolve. Here, we assessed selection...
Acutely stressful experiences can have profound and persistent effects on phenotype. Across taxa, individuals differ remarkably in their susceptibility to stress. However, the mechanistic causes of enduring stress effects, individual differences susceptibility, are poorly understood. Here, we tested whether brief, acute increases glucocorticoid hormones phenotype, according magnitude or duration elevation. We used a novel method non-invasively manipulate hormone levels short time scales:...
Abstract Hormones are central regulators of organismal function and flexibility that mediate a diversity phenotypic traits from early development through senescence. Yet despite these important roles, basic questions about how why hormone systems vary within across species remain unanswered. Here we describe HormoneBase, database circulating steroid levels their variation vertebrates. This aims to provide all available data on the mean, variation, range plasma glucocorticoids (both baseline...
Animals respond to sudden challenges with a coordinated set of physiological and behavioral responses that enhance the ability cope stressors. While general characteristics vertebrate stress response are well described, it is not as clear how individual components covary between or within individuals. A rapid increase in glucocorticoids coordinates one primary downstream results an glucose availability via reduced utilization. Here, we asked whether between- within-individual variation...