A5051833670- Mitochondrial Function and Pathology
- Antioxidant Activity and Oxidative Stress
- Aquaculture Nutrition and Growth
- Plant and animal studies
- Animal Behavior and Reproduction
- Genomics and Phylogenetic Studies
- Environmental Toxicology and Ecotoxicology
- Marine and coastal ecosystems
- Photoreceptor and optogenetics research
- Evolution and Genetic Dynamics
- Cephalopods and Marine Biology
- Genetic diversity and population structure
- Neurobiology and Insect Physiology Research
- Species Distribution and Climate Change
- melanin and skin pigmentation
- Genetic Mapping and Diversity in Plants and Animals
- Animal Genetics and Reproduction
- Marine Biology and Ecology Research
- Silk-based biomaterials and applications
- Ecology and Vegetation Dynamics Studies
- Physiological and biochemical adaptations
- Protist diversity and phylogeny
- American Constitutional Law and Politics
- Medical Imaging and Analysis
- Botany, Ecology, and Taxonomy Studies
Iowa State University
2021-2025
Auburn University
2016-2020
The University of Texas at Austin
2019-2020
Google (United States)
2017
National Taiwan Normal University
2016
Virginia Commonwealth University
2014
University of Toledo
2008
Abstract Mitochondrial (mt) and nuclear-encoded proteins are integrated in aerobic respiration, requiring co-functionality among gene products from fundamentally different genomes. Different evolutionary rates, inheritance mechanisms, selection pressures set the stage for incompatibilities between interacting of two The mitonuclear coevolution hypothesis posits that may be avoided if evolution one genome selects complementary changes genes encoded by other genome. Nuclear compensation, which...
Red carotenoid-based coloration is widely distributed across marine and terrestrial animals has taken a prominent role in studies of how phenotypic traits evolve response to natural sexual selection. Key these an understanding the physiological mechanisms involved production red coloration, yet model laboratory system for such work lacking. The copepod Tigriopus californicus used as ecotoxicology, genetics physiology, but its bright have not been well studied. Like nearly all that display...
The environment in which eukaryotes first evolved was drastically different from what they experience today, and one of the key limiting factors availability oxygen for mitochondrial respiration. During transition to a fully oxygenated Earth, other compounds such as sulfide posed considerable constraint on using aerobic respiration energy production. ancestors animals, those that simpler have respiratory components are absent later-evolving animals. Specifically, mitochondria most basal...
Abstract Eukaryotes are the outcome of an ancient symbiosis and as such, eukaryotic cells fundamentally possess two genomes. As a consequence, gene products encoded by both nuclear mitochondrial genomes must interact in intimate precise fashion to enable aerobic respiration eukaryotes. This genomic architecture eukaryotes is proposed necessitate perpetual coevolution between maintain coadaptation, but presence also creates opportunity for intracellular conflict. In collection papers that...
Carotenoids are well known for their contribution to the vibrant coloration of many animals and have been hypothesized be important antioxidants. Surprisingly few examples carotenoids acting as biologically relevant antioxidants in vivo exist, part because experimental designs often employ dosing with at levels that rarely observed nature. Here we use an approach reduces carotenoid content from wild-type test effect protectants against oxidative challenge. We used marine copepod, Tigriopus...
Red coloration is a widely distributed phenotype among animals, yet the pigmentary and genetic bases for this have been described in relatively few taxa. Here we show that Hawaiian endemic anchialine shrimp Halocaridina rubra red because of accumulation astaxanthin. Laboratory colonies phylogenetically distinct lineages H. colony-specific amounts astaxanthin are developmentally, likely genetically, fixed. Carotenoid supplementation restriction experiments failed to change content from...
AbstractDisentangling different types of selection is a common goal in molecular evolution. Elevated
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...
While the specific mechanisms of colour production in biological systems are diverse, mechanics straightforward and universal. Colour is produced through selective absorption light by pigments, scattering nanostructures or a combination both. When Tigriopus californicus copepods were fed carotenoid-limited diet yeast, their orange-red body coloration became faint, but eyespots remained unexpectedly bright red. Raman spectroscopy indicated clear signature red carotenoid pigment astaxanthin...
Mitochondrial (mt) respiration depends on proteins encoded both by the mitochondrial and nuclear genomes. Variation in mt-DNA mutation rates exists across eukaryotes, although functional consequences of elevated mt some lineages remain underexplored. In angiosperm genus Silene , closely related, ecologically similar species have either ‘fast' or ‘slow' rates. Here, we investigated profiles mitochondria. Overall levels were among Species. Fast had lower efficiency than slow relied up to 48%...
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...
An animal's pace of life is mediated by the physiological demands and stressors it experiences (e.g., reproduction) one likely mechanism that underlies these effects oxidative stress. Reproduction has been shown to increase or reduce stress under different conditions modify mitochondrial performance. We hypothesized changes associated with reproduction can alter how animals respond future stressors. tested this theory comparing organ-specific response in female wild-derived house mice....
Abstract Male Painted Buntings (Passerina ciris) display at least 6 distinct plumage colors that encapsulate much of the visible light spectrum, yet specific mechanisms responsible for generating this diversity color have not been identified. Here, we show metabolically derived carotenoids and nanostructures capable producing structural were ubiquitous across feather patches. We used digital photography, microscopy, spectrophotometry, carotenoid extraction, high-performance liquid...
The nature of temporal variability during speeded finger tapping was examined using linear (standard deviation) and non-linear (Lyapunov exponent) measures. Experiment 1 found that right hand characterised by lower amounts both measures than left tapping, were often negatively correlated with one another. 2 increased associated relatively enhanced performance on a closed-loop motor task (mirror tracing) impaired an open-loop (pointing in dark room), especially for performance. potential uses...
Abstract Disentangling different types of selection is a common goal in molecular evolution. Elevated d N / S ratios (the ratio nonsynonymous to synonymous substitution rates) focal lineages are often interpreted as signs positive selection. Paradoxically, relaxed purifying can also result elevated ratios, but tests distinguish these two causes seldomly implemented. Here, we reevaluated seven case studies describing animal mtDNA and their accompanying hypotheses regarding They included...