A5051257878- Amphibian and Reptile Biology
- Animal Behavior and Reproduction
- Fish Ecology and Management Studies
- Neuroscience of respiration and sleep
- Neonatal and fetal brain pathology
- Insect and Arachnid Ecology and Behavior
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Plant and animal studies
- Neuroendocrine regulation and behavior
- Cerebrospinal fluid and hydrocephalus
- Environmental Toxicology and Ecotoxicology
- Turtle Biology and Conservation
- Barrier Structure and Function Studies
- Circadian rhythm and melatonin
- Avian ecology and behavior
- Bird parasitology and diseases
- Neurobiology and Insect Physiology Research
- Fetal and Pediatric Neurological Disorders
- Anesthesia and Neurotoxicity Research
- Genetic diversity and population structure
- Diet and metabolism studies
- Insect and Pesticide Research
- Wildlife-Road Interactions and Conservation
- Neurogenesis and neuroplasticity mechanisms
Oklahoma State University Oklahoma City
2020
University of Georgia
2006-2019
Savannah River National Laboratory
2006-2019
University of Rochester
1972-2015
Colorado State University
1974-2015
Tulane University
2015
University of South Carolina Aiken
2015
Wayne State University
2015
Purdue University West Lafayette
2013
Carolina Urology Partners
2012
A s a group [reptiles] are nei t h er ‘good ’n or ‘b ad ,’ but ia re intere ting and unu su l , o u gh of m i n port ce . If ey should all disappe r, it wo d not make mu ch differen one way the other ”( Zim Smith 1953, p. 9 ) Fortu tely, this op on from Golden Gu de Series does persist tod ay; most people have com e to recogn ze va lue both reptiles amph bians as an tegral part tu ral eco ys tems heralds envi ron ental qu ty (Gibbons Stangel 1999). In recent ye rs overa ll aw reness among p...
The relationships among timing of metamorphosis, size at and traits related to adult fitness were studied for 8 yr in the salamander Ambystoma talpoideum a temporary pond. Among years, modal time metamorphosis mean body positively correlated with date pond dried. In years that dried late, one group larvae metamorphosed well before dried, whereas other just drying. Mean late—metamorphosing individuals was not greater than metamorphosing early. Early—metamorphosing males females larger first...
Reports of declining amphibian populations in many parts the world are numerous, but supporting long-term census data generally unavailable. Census from 1979 to 1990 for three salamander species and one frog at a breeding pond South Carolina showed fluctuations substantial magnitude both size recruitment juveniles. Breeding population sizes exhibited no overall trend increased fourth. Recent droughts account satisfactorily an increase failures. These illustrate that distinguish between...
Factors that affect traits of aquatic larvae amphibians may have long—lasting effects on terrestrial juveniles and adults. I manipulated larval densities marbled salamanders, Ambystoma opacum, in large—scale field enclosures during 2 yr, released the metamorphosed from these enclosures, tested for adults returned to pond 6—7 subsequent breeding seasons. Individuals low density treatments tended greater lipid stores at metamorphosis than those high survived longer a laboratory inanition...
Abstract: Despite the continuing loss of wetland habitats and associated declines in amphibian populations, attempts to translate losses into measurable ecosystems have been lacking. We estimated potential productivity from community that would be compromised by a single isolated has protected most industrial, agricultural, urban impacts for past 54 years. used continuous drift fence at Ellenton Bay, 10‐ha freshwater on Savannah River Site, near Aiken, South Carolina (U.S.A.), sample all...
Climate change has had a significant impact globally on the timing of ecological events such as reproduction and migration in many species. Here, we examined phenology reproductive migrations 10 amphibian species at wetland South Carolina, USA using 30 year dataset. We show for first time that two autumn-breeding amphibians are breeding increasingly later recent years, coincident with an estimated 1.2°C increase local overnight air temperatures during September through February pre-breeding...
This experiment was designed to measure the effects of larval density on traits in salamander Ambystoma opacum, and ascertain whether previous studies conducted at smaller spatial scales or higher densities produced artifactual results. Density growth, body size metamorphosis, length period, survival metamorphosis were studied A. opacum large—scale (41 m 2 23 ) field enclosures two temporary ponds. Each enclosure contained indigenous populations prey (zooplankton insects) predators, as well...
Amphibian populations at the Savannah River Site (SRS), South Carolina, USA, have been censused consistently for 35 years, and this provides a time series to examine causes of population fluctuations. We examined archived museum specimens 15 anuran species collected wetlands on SRS presence causative agent (Batrachochytrium dendrobatidis) chytridiomycosis, an emerging disease associated with declines elsewhere. Infections were present in three out 137 (2.18%) individuals; pathogen was...
During mating, male Drosophila melanogaster transfer to the female's cuticle a compound (7-tricosene) that is almost absent from virgin females but major hydrocarbon component of male's cuticle. first 3 hr after amount 7-tricosene on female decreases sharply remains significantly above levels. By 6 synthesis has increased, and release it when they are exposed courting males. Transfer immature by males their attractiveness, so demonstrable antiaphrodisiac properties. Thus, mated D. appear...
Abstract: Wide variation in reproductive success is common among amphibians that breed seasonal ponds, but persistence of adults can buffer against these fluctuations, particularly for long‐lived species. We hypothesized the frequent episodes catastrophic failure marbled salamander (Ambystoma opacum) enhance importance high terrestrial survival. At Rainbow Bay South Carolina was poor (<1 metamorph/breeding female) nearly half 22 years species bred. Complete occurred 6 years. To study...
Understanding the demography of species over recent history (e.g. <100 years) is critical in studies ecology and evolution, but records population are rarely available. Surveying genetic variation a potential alternative to census-based estimates size, can yield insight into population. However, assess performance methods, it important compare their known demography. Here, we leveraged exceptional resources from wetland with 37 years amphibian mark-recapture data study utility genetically...