A5035695944- Animal Behavior and Reproduction
- Antioxidant Activity and Oxidative Stress
- Physiological and biochemical adaptations
- Aquaculture Nutrition and Growth
- Simulation Techniques and Applications
- Plant and animal studies
- Adipose Tissue and Metabolism
- Genetic diversity and population structure
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Effects of Environmental Stressors on Livestock
- Neurobiology and Insect Physiology Research
- Wildlife Ecology and Conservation
- Mitochondrial Function and Pathology
- Complex Systems and Decision Making
- Genetic and phenotypic traits in livestock
- Reinforcement Learning in Robotics
- Spaceflight effects on biology
- melanin and skin pigmentation
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal plant biology
- Crustacean biology and ecology
- Systems Engineering Methodologies and Applications
- Infrastructure Resilience and Vulnerability Analysis
- Marine and fisheries research
Oregon State University
2023-2024
Auburn University
2019-2024
Mitre (United States)
2022
Naval Postgraduate School
2012
Carotenoid coloration is widely recognized as a signal of individual condition in various animals, but despite decades study, the mechanisms that link carotenoid to remain unresolved. Most birds with red feathers convert yellow dietary carotenoids an oxidation process requiring gene encoding putative cytochrome P450 enzyme CYP2J19. Here, we tested hypothesis and feather pigmentation functionally linked mitochondrial performance. Consistent this hypothesis, observed high levels ketolated...
An important component of life history theory is understanding how natural variation arises in populations. Both endogenous and exogenous factors contribute to organism survival reproduction, therefore, it understand such are both beneficial detrimental population dynamics. One ecologically relevant factor that influences the aquatic organisms ultraviolet (UV) radiation. While majority research has focused on potentially effects UV radiation organisms, few studies have evaluated hormetic...
ABSTRACT The shared-pathway hypothesis offers a cellular explanation for the connection between ketocarotenoid pigmentation and individual quality. Under this hypothesis, metabolism shares pathways with mitochondrial oxidative phosphorylation such that red carotenoid-based coloration is inextricably linked function. To test we exposed Tigriopus californicus copepods to mitochondrially targeted protonophore, 2,4-dinitrophenol (DNP), induce proton leak in inner membranes. We then measured...
Abstract Carotenoid coloration is widely recognized as a signal of individual condition in various animals, but despite decades study, the mechanisms that link carotenoid to remain unresolved. Most birds with red feathers convert yellow dietary carotenoids an oxidation process requiring gene encoding putative cytochrome P450 enzyme CYP2J19. Here, we tested hypothesis and feather pigmentation functionally linked mitochondrial performance. Consistent this hypothesis, observed high levels...
Abstract Colorful ornaments are hypothesized to have evolved in response sexual selection for honest signals of individual quality that provide information about potential mates. Red carotenoid coloration is common diverse groups, and some vertebrate taxa, red a sexually selected trait whereby mates with the reddest preferred . Despite being widespread among invertebrates, whether assessed during mate choice these taxa unclear. The marine copepod Tigriopus californicus displays from...
Simulation has overcome critical obstacles to become a valuable method for obtaining insights about the behavior of complex systems. George Box's famous assessment that "all models are wrong, some useful" referred statistical models, but should now be reimagined reflect many simulation "right enough" aid in decision making important practical problems. Over past fifty years, transformed from its beginnings as brute-force numerical integration into an attractive and sophisticated option...
A determination of how the color animal integument is produced a starting point for investigations into function and evolution coloration. The mechanisms that give rise to bare skin New World vultures are largely unexplored. Here, we investigate source production in Turkey Vultures (Cathartes aura) Black (Coragyps atratus). Using UV–vis reflectance spectroscopy, found evidence hemoglobin primary pigment responsible red coloration on heads Vultures, eumelanin black Vultures. Light microscopy...
Simulation has overcome critical obstacles to become a valuable method for obtaining insights about the behavior of complex systems. George Box's famous assessment that all models are wrong, some useful referred statistical models, but should now be reimagined reflect many simulation right enough aid in decision making important practical problems. Over past fifty years, transformed from its beginnings as brute-force numerical integration into an attractive and sophisticated option makers....
Purpose Rapid sensitivity analysis and near-optimal decision-making in contested environments are valuable requirements when providing military logistics support. Port of debarkation denial motivates maneuver from strategic operational locations, further complicating Simulations enable rapid concept design, experiment testing that meet these complicated logistic support demands. However, simulation model analyses time consuming as output data complexity grows with input. This paper proposes...
The process of speciation remains poorly understood and hence definitions species continue to be a focus sharp debate. A key unresolved issue in debates is whether local populations that are somewhat distinct from parent population morphology or genotype but remain connected the via gene flow should recognized as species. status Cassia crossbill Loxia sinesciuris , well other distinctive red curvirostra clade including parrot L. pytyopsittacus Scottish scotica test cases for hundreds avian...
The marine copepod, Tigriopus californicus , produces the red carotenoid pigment astaxanthin from yellow dietary precursors. This ‘bioconversion’ of carotenoids to is hypothesized be linked individual condition, possibly through shared metabolic pathways with mitochondrial oxidative phosphorylation. Experimental inter-population crosses lab-reared T . typically low-fitness hybrids due in large part disruption coadapted sets nuclear and genes within parental populations. These hybrid...
Abstract Carotenoid pigmentation produces the yellow and red coloration of birds other vertebrates, but our understanding genetic architecture carotenoid ornamentation is largely limited to studies novel color variants observed in captively bred populations. The complexity carotenoid-based evolution nature remains poorly characterized. Here, we examine long-tailed finch Poephila acuticauda , an Australian songbird with two hybridizing subspecies that differ bill coloration: western eastern...
In a hybrid zone between two tropical lekking birds, yellow male plumage of one species has introgressed asymmetrically replacing white another via sexual selection. Here, we present detailed analysis the trait to uncover its physical and genetic bases trace evolutionary history. We determine that carotenoid lutein underlies phenotype describe microstructural feather features likely enhance color appearance. These same reduce predicted water shedding capacity feathers, potential liability in...
Abstract To produce viable offspring, organisms may assess mates via criteria that include traits, such as sex, species, age, reproductive status, population identity and individual quality. Copepods are small, ubiquitous crustaceans live in freshwater marine systems around the world whose patterns of mate choice have been long studied numerous species. Herein, we synthesized decades experiments describing sexual selection copepods to importance mating criteria. We used formal,...
The Peace Game is a software-based model of peace and stability operations that are underway in regions such as South Sudan Afghanistan with the potential to revolutionize campaign planning. an immersive environment requiring no special installation designed expose decision-makers complexities non-linear qualities modern conflict. facilitates multiple players assuming roles government leaders, military coalition commanders, NGO representatives, or various militia camps they attempt cooperate...