A5055206313- Animal Behavior and Reproduction
- Avian ecology and behavior
- Physiological and biochemical adaptations
- Bird parasitology and diseases
- Marine animal studies overview
- Plant and animal studies
- Bat Biology and Ecology Studies
- Mercury impact and mitigation studies
- Animal Vocal Communication and Behavior
- Stress Responses and Cortisol
- Inflammatory Bowel Disease
- Animal Behavior and Welfare Studies
- Wildlife Ecology and Conservation
- Gut microbiota and health
- Birth, Development, and Health
- Species Distribution and Climate Change
- Force Microscopy Techniques and Applications
- Animal Nutrition and Physiology
- Aquaculture Nutrition and Growth
- Neuroendocrine regulation and behavior
- Gene Regulatory Network Analysis
- Heavy Metal Exposure and Toxicity
- Exercise and Physiological Responses
- Circadian rhythm and melatonin
- Reproductive biology and impacts on aquatic species
Auburn University
2016-2025
Kyorin University
2017-2025
Nagoya Institute of Technology
2020-2023
University of the Ryukyus
2022
Western University
2011-2018
Virginia Tech
2007-2014
The University of Texas at Austin
2002-2010
William & Mary
2009
University of Montana
2008
Tohoku University
2006
Much of the research on sublethal, adverse effects mercury (Hg) has focused impairment neurological function and reproduction in fish fish-eating vertebrates. Here we examined associations between Hg endocrine (adrenocortical responses plasma thyroid hormone concentrations) insectivorous tree swallow nestlings adjacent to a Hg-contaminated river nearby reference rivers Virginia. Nestlings from contaminated sites had blood concentrations that exceeded those by more than an order magnitude...
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...
Global warming is one of the primary drivers habitat loss and population decline in numerous species, including birds, amphibians marine life. Avian embryos exhibit ectothermic phenotypes during most their incubation period are also vulnerable to rising temperatures when parents cannot cool nests. This vulnerability stems from unique respiratory mechanisms, which utilize eggshell pores exchange gases. The number fixed at oviposition, may experience hypoxia later developmental stages,...
Within studies of acute stress physiology an increase in glucocorticoid secretion is thought to be the primary mediator tissue response stress. Corticosteroid-binding globulin may regulate availability steroids, but has not been considered a dynamic component response. Here, we examined CBG level over common 60-minute time frame capture and handling protocol investigate whether capacity or static short stressors. Using comparative approach, measured nine species birds, representing five...
Although stress is usually associated with disease, the physiological and behavioral responses to stressors are critical mechanisms of resilience for healthy organisms. A recent workshop comprised researchers who study humans both free-living captive non-human animals identified a number key roadblocks that impeding progress in understanding how integrate into normal physiology an animal. These include lack of: (1) unambiguous definition phenotype; (2) robust biomarker, or suite biomarkers,...
In birds, incubation temperature can vary by several degrees Celsius among nests of a given species. Parents may alter to cope with environmental conditions and/or manipulate embryonic development, and such changes in behavior could have long-lasting effects on offspring phenotype. To investigate short- long-term suboptimal temperatures survival physiological functions zebra finches, eggs were incubated at 36.2, 37.4, 38.4°C for the entire period. Post-hatch environment was identical...
SUMMARY Developing animals may face a cost–benefit tradeoff during growth mediated through hormones such as glucocorticoids, the hormone is essential for development but can have detrimental consequences. To investigate potential tradeoffs caused by brief, moderate elevations of corticosterone in avian young, we artificially elevated levels two ways: feeding corticosterone-containing worms and applying dermal patches. The former experiment tested effects an acute elevation(25 min) on begging...
Abstract Background Small bowel capsule endoscopy (SBCE) is a less invasive modality for the evaluation of small lesions in Crohn’s disease (CD). The CD that are visualized include inflammation and stenosis, standardized scores used objective assessment activity. On other hand, it not clear whether experience or individual differences influence scoring. We assessed correlation each investigator interobserver agreement SBCE scores. Methods Retrospective study including 15 patients who...
Stress during development can elicit lifelong changes to an organism. However, whether these are beneficial or detrimental only be determined by their effect on fitness outcomes. Furthermore, the of severe, chronic food restriction ornamentation, which influence attractiveness, still needs explored. In this study, zebra finches (Taeniopygia castanotis) were exposed either ad libitum (control) diet a 40% restricted (food-restricted) throughout postnatal development. Pictures beaks and cheek...
Numerous studies indicate interspecies variation in the ontogeny of adrenocortical response birds; however, little is known about extent interindividual avian young. Toward this end, we examined and zebra finch (Taeniopygia guttata) nestlings. We measured baseline stress‐induced total (bound free) corticosterone, corticosteroid binding globulin capacity, resulting estimated free corticosterone levels nestlings four different ages (days 5, 10, 16, 21). In addition, investigated potential...
Developmental conditions may influence many aspects of adult phenotype, including growth and immune function. Whether poor developmental environments impair both function or induce a trade-off between the two processes is inconclusive, impact timing stress in determining this relationship has so far been overlooked. We tested hypothesis that long-term effects nutritional on growth, body composition, zebra finches (Taeniopygia guttata) are different depending whether experienced during an...
There is mounting evidence that, across taxa, females breeding in competitive environments tend to allocate more testosterone their offspring prenatally and these typically have aggressive faster-growing phenotypes. To date, no study has determined the mechanisms mediating this maternal effect's influence on phenotype. However, levels of estrogen receptor alpha (ER α) gene expression are linked differences early growth aggression; thus, hormones may alter regulation, perhaps via DNA...
Although many therapeutic options are available for inflammatory bowel disease (IBD), 5-aminosalicylic acid (5-ASA) is still the key medication, particularly ulcerative colitis (UC). However, mechanism of action 5-ASA remains unclear. The intestinal microbiota plays an important role in pathophysiology IBD, and we hypothesized that alters microbiota, which promotes anti-inflammatory effect 5-ASA. Because inflammation affects gut can change severity inflammation, assessing impact on not...
Seasonal modulation of the adrenocortical response appears to be ubiquitous in mid‐ high‐latitude vertebrates but has not been investigated tropical vertebrates. Previous studies demonstrate that temperate passerines show seasonality corticosterone secretion and corticosteroid binding globulin capacities. We examined seasonal sex differences stress an equatorial population Zonotrichia capensis, only breeds tropics, compared results with those northern Zonotrichia. would presumably...