A5007605850- Physiological and biochemical adaptations
- Aquaculture Nutrition and Growth
- Toxic Organic Pollutants Impact
- Fish Ecology and Management Studies
- Per- and polyfluoroalkyl substances research
- Ocean Acidification Effects and Responses
- Atmospheric chemistry and aerosols
- Reproductive biology and impacts on aquatic species
- Isotope Analysis in Ecology
- Ichthyology and Marine Biology
- Mass Spectrometry Techniques and Applications
- Marine Bivalve and Aquaculture Studies
- Crustacean biology and ecology
- Environmental Toxicology and Ecotoxicology
- Metabolomics and Mass Spectrometry Studies
- Genetic Syndromes and Imprinting
- Bioinformatics and Genomic Networks
- Ion-surface interactions and analysis
- Marine and fisheries research
- Aquatic Ecosystems and Phytoplankton Dynamics
- High Altitude and Hypoxia
- Neurobiology and Insect Physiology Research
- Parathyroid Disorders and Treatments
- Effects and risks of endocrine disrupting chemicals
- Marine and coastal ecosystems
Purdue University West Lafayette
2015-2022
Tetra Tech (United States)
2022
Institute for Environmental Management
2019
Bamfield Marine Sciences Centre
2013-2015
University of Alberta
2013-2015
University of Miami
2011
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are synthetic fluorinated compounds that highly bioaccumulative persistent organic pollutants. Perfluorooctanoic acid (PFOA), an eight-carbon chain perfluorinated carboxylic acid, was used heavily for the production of fluoropolymers, but concerns have led to its replacement by shorter carbon homologues such as perfluorohexanoic (PFHxA) perfluorobutanoic (PFBA). However, limited toxicity data exist these substitutes. We evaluated PFOA,...
Abstract Per‐ and polyfluoroalkyl substances (PFAS) are contaminants of concern due to their widespread occurrence in the environment, persistence, potential elicit a range negative health effects. regularly detected surface waters, but effects on many aquatic organisms still poorly understood. Species with thyroid‐dependent development, like amphibians, can be especially susceptible PFAS thyroid hormone regulation. We examined sublethal exposure four commonly larval northern leopard frogs (...
The absorption of Cl(-) and water from ingested seawater in the marine fish intestine is accomplished partly through Cl(-)/HCO(3)(-) exchange. Recently, a H(+) pump (vacuolar-type H(+)-ATPase) was found to secrete acid into intestinal lumen, it may serve titrate luminal HCO(3)(-) facilitate further exchange, especially posterior intestine, where adverse concentration gradients could limit expressed all segments gill tissue gulf toadfish (Opsanus beta) maintained natural seawater. After acute...
Per/polyfluoroalkyl substances (PFASs) are persistent organic contaminants that ubiquitous in surface waters. To date, their effects on aquatic systems, especially amphibians, poorly understood. We examined the uptake and depuration of perfluorooctanesulfonate (PFOS), perfluorohexanesulfonate (PFHxS), perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonate (6:2 FTS) northern leopard frog (Rana pipiens) tadpoles. Whole-body concentrations were every 10 d during constant aqueous exposure to...
Spatial maps of lipid profiles in intact zebrafish embryos and a description variation through early development.
Female yellow perch Perca flavescens exposed to three overwinter temperature regimes (4, 8 and 13° C) for 150 days spawned in markedly different proportions upon spring warming (37% of females 4° C v. 64 91% treatments, respectively), but exhibited no differences fecundity, egg size or lipid content. Females held at also less within-clutch variation than C. Moreover, eggs differed among treatments the overall 18 fatty acids, with colder resulting potentially higher quality containing more...
Natural and human activities can result in both high temporal spatial variability water temperature. Rapid temperature changes have the potential to dramatically affect physiological processes aquatic organisms and, due their limited mobility, fish early life stages are particularly vulnerable ambient fluctuations. In this study, we examined how magnitude frequency of fluctuations survival, growth, development, expression thermoresponsive genes, gonadal differentiation fathead minnows,...
Inorganic phosphate (P i ) is an essential nutrient for all organisms, but in seawater, P a limiting nutrient. This study investigated the primary mechanisms of uptake Pacific hagfish ( Eptatretus stoutii) using ex vivo physiological and molecular techniques. Hagfish were observed to have capacity absorb from environment into at least three epithelial surfaces: intestine, skin, gill. tissues was concentration dependent, saturable transport skin gill <2.0 mmol/l . Gill intestinal sodium...
Abstract Despite the high rate of egg mortality due to predation, few teleost fishes utilize external casings for protecting their eggs. The gelatinous matrix, or skein, produced by Yellow Perch Perca flavescens may provide a variety benefits including deterring predators. This study explored chemical components skein in addition testing preferences two common predators, Round Goby Neogobius melanostomus and calico crayfish Orconectes immunis , when presented with three potential prey: eggs...