A5076988865- Amphibian and Reptile Biology
- Fish biology, ecology, and behavior
- Species Distribution and Climate Change
- Ichthyology and Marine Biology
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Animal and Plant Science Education
- Marine animal studies overview
- Fish Biology and Ecology Studies
- Animal Behavior and Reproduction
- Turtle Biology and Conservation
- Rangeland and Wildlife Management
- Physiological and biochemical adaptations
- Neurobiology and Insect Physiology Research
- Animal Vocal Communication and Behavior
- Primate Behavior and Ecology
- Coral and Marine Ecosystems Studies
- Insect and Arachnid Ecology and Behavior
- Environmental Toxicology and Ecotoxicology
- Wildlife-Road Interactions and Conservation
- History of Science and Natural History
- Anatomy and Medical Technology
- Freshwater macroinvertebrate diversity and ecology
- Conservation, Ecology, Wildlife Education
- Bat Biology and Ecology Studies
Indiana University
2013-2025
Indiana University School of Medicine
2013-2025
Indiana State University
2009-2022
Texas Parks and Wildlife Department
2019
Stellenbosch University
2017
Institute of Cell Biology and Neurobiology
1996-2016
Florida State University
2014
Cornell University
2014
Indiana University – Purdue University Indianapolis
2011
Dalhousie University
1984-2009
Abstract: Management of amphibian populations to reverse recent declines will require defining high‐quality habitat for individual species or groups species, followed by efforts retain restore these habitats on the landscape. We examined landscape‐level relationships frogs and toads measuring associations between relative abundance richness based survey data derived from anuran calls features land‐cover maps Iowa Wisconsin. The most consistent result across all guilds was a negative...
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A large number of factors are known to affect amphibian population viability, but most authors agree that the principal causes declines habitat loss, alteration, and fragmentation. We provide a global assessment land use dynamics in context distributions. accomplished this by compiling maps species richness recent rates change cover, use, human growth. The map was developed using combination published literature digital databases. used an ecoregion framework help interpret distributions...
To fully comprehend chytridiomycosis, the amphibian disease caused by chytrid fungus Batrachochytrium dendrobatidis (Bd), it is essential to understand how Bd affects amphibians throughout their remarkable range of life histories. Crawfish Frogs (Lithobates areolatus) are a typical North American pond-breeding species that forms explosive spring breeding aggregations in seasonal and semipermanent wetlands. But unlike most species, when not usually live singly—in nearly total isolation from...
In 1989, it dawned on participants at the First World Congress of Herpetology that observed declines in amphibian populations might actually be global scope and unprecedented severity. Three decades research since then has produced an enormous increase our knowledge ecology appreciation complexity possible causes for population declines. September 2019, 30 yr after ended, a day-long, international symposium was held Redpath Museum McGill University Montreal, Canada. Symposium drew upon...
Comparative studies of mortality in the wild are necessary to understand evolution aging; yet, ectothermic tetrapods underrepresented this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study aging rates and longevity across tetrapod ectotherms, using data from 107 populations (77 species) nonavian reptiles amphibians. test hypotheses how thermoregulatory mode, environmental temperature, protective phenotypes, pace life history contribute...
-In light of the reports declines in amphibian numbers we have repeated Blanchard's (1923) survey amphibians Dickinson County, Iowa. We found that five species reported by Blanchard persist: eastern tiger salamander (Ambystoma tigrinum tigrinum), American toad (Bufo americanus), western chorus frog (Pseudacris triseriata triseriata), gray treefrog (Hyla versicolor/chrysoscelis) and northern leopard (Rana pipiens). Two were not found: mudpuppy (Necturus maculosus) cricket (Acris crepitans...
The widespread appearance of frogs with deformed bodies has generated much press coverage over the past decade. Frogs extra limbs or digits, missing misaligned appendages raise an alarming question: Are humans next? Taking a fresh look at this disturbing environmental problem, reference provides balanced overview science behind malformed frog phenomenon. Bringing together data from ecology, parasitology, and other disciplines, Michael Lannoo considers possible causes these deformities, tells...
Amphibian conservation concerns frequently center on the idea of 'saving' them, with underlying assumption they are passive victims anthropogenic environmental change. But this approach ignores physiological, biochemical, and behavioral flexibility amphibians have employed since first evolved ~365 million years ago. One overlooked advantage possess in struggle for survival, one humans might use their efforts to conserve is brains share same blueprint as human brains, which allows them...
The recent increase in the incidence of deformities among natural frog populations has raised concern about state environment and possible impact unidentified causative agents on health wildlife human populations. An open workshop Strategies for Assessing Implications Malformed Frogs Environmental Health was convened 4-5 December 1997 at National Institute Sciences Research Triangle Park, North Carolina. purpose to share information a multidisciplinary group with scientific interest...
Abstract Monoclonal antibody (mab) anti‐zebrin II recognizes a single 36‐kD polypeptide in Purkinje cells the rat and fish cerebellum. In adult rat, zebrin + form, each hemicerebellum, seven parasagittal bands interposed by − bands. We show that, rats, immunoreactivity first appears caudally at postnatal day 5 spreads; all are labelled 12. Subsequently, is selectively lost so that 18 pattern of +/− immunoreactive created. This indicates two types according to developmental trajectory, −/+...
Generalized anuran tadpoles across families exhibit a similar neuromast morphology on their heads, as follows: (1) all lines known for anurans are present; (2) within these total number ranges from about 250 to 320; (3) neuromasts form linear stitches composed of two three, but sometimes up five, neuromasts; (4) dimensions ⩽ 10 μm; and (5) contain 15 hair cells. Compared with generalized forms, stream, arboreal, carnivorous, desert-pond forms have fewer they more They do not, however,...
We report growth, body size and diet of typical cannibalistic larval Ambystoma tigrinum morphs. The study population, located in northwestern Iowa (430 23' N, 950 1 1' W), currently represents the first instance morphs subspecies A. t. northeastern limit complex. A comparison food habits larvae 1980, when morph was absent, with 1981, present, shows no basic differences. In both years a wide variety prey were ingested Daphnia being most abundant. Because 1981 drought year our ponds drying,...
Abstract Crawfish frogs ( Lithobates areolatus ) have experienced declines across large portions of their former range. These are out proportion to syntopic wetland‐breeding amphibian species, suggesting losses resulting from unfavorable aspects non‐breeding upland habitat. get common name affinity for crayfish burrows, although the strength this relationship has never been formally assessed. We used radiotelemetry address 4 questions related burrow dwelling in crawfish frogs: 1) what types...
Coal extraction has been occurring in the Midwestern United States for over a century. Despite pre-mining history of landscape as woodlands, spent surface coalfields are often reclaimed to grasslands. We assessed amphibian and reptile species on large tract coal spoil prairie found 13 amphibians (nine frog four salamander species) 19 reptiles (one lizard, five turtle, snake species). Two state-endangered three state special concern were documented. The diversity at our study site was...
The chytrid fungus Batrachochytrium dendrobatidis (Bd) has been devastating amphibians globally. Two general scenarios have proposed for the nature and spread of this pathogen: Bd is an epidemic, spreading as a wave wiping out individuals, populations, species in its path; endemic, widespread throughout many geographic regions on every continent except Antarctica. To explore these hypotheses, we conducted transcontinental transect United States Department Defense (DoD) installations along...
Abstract The Channichthyidae, one of five Antarctic notothenioid families, includes 16 species and 11 genera. Most live at depths 200–800 m are a major component fish biomass in many shelf areas. Channichthyids unique among adult fishes possessing pale white blood containing few vestigal erythrocytes no hemoglobin. Here we describe the brains seven special sense organs eight channichthyids. We emphasize Chionodraco hamatus C. myersi, compare these to other channichthyids, relate our findings...
Abstract The nerves of the anterior lateral line system in embryonic and larval stages weakly electric gymnotiform fish Eigenmannia were visualized by injection fluorescent marker DiI into primordium (ALLN) posterior (PLLN) nerves. Examination developmental series reveals that nerve fibers innervate electrosensory mechanosensory components are present before first mechanoreceptors electroreceptors have differentiated. This suggests might induce formation receptors. Whereas innervation...
Using scanning electron microscopy I determined neuromast number and orientation, sensory epithelial surface area relative position, hair cell per neuromast, size, stitch formation in aquatic urodeles. All salamanders examined (34 specimens, 20 species, 16 genera, nine families) had neuromasts. The basic pattern of organization was similar all consisting a single row circumorbital (supraorbital + infraorbital) neuromasts anteriorly along the snout two rows nasal three maxillary Nasal groups...