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Showing 1 to 20 of 58 for “"anuran"”.
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Developmental changes in organ systems of transforming anuran larvae
… information about the general anatomy of anuran larvae is not readily available. The present study is a comparison of the general morphological changes during metamorphic climax of three anuran species belonging to three different families. This anatomical information is designed to assist …
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Effects of Anthropogenic Light and Noise on Anuran Breeding Behavior
… animals, little attention has been given to anurans and the effects artificial light at night and anthropogenic noise have on their behavior. This study investigated the effects of artificial light at night and anthropogenic noise on anuran breeding systems in eastern Texas. Specifically, …
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Fecal Bacterial Communities as an Indicator of Trophic Interactions Among Anuran Larvae
<p>Anurans are mass spawners, often with multiple females spawning together, resulting in thousands of tadpoles sharing a habitat. Such large numbers of tadpoles with limited dispersal can lead to intense competition for resources. Inter and intra-specific competition for food could have negative …
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Ecological Assembly of Leaf-Litter Anuran Communities Across a Neotropical Land-Bridge Archipelago
… underlie the community assembly of leaf-litter anurans on a Neotropical archipelago. I combined experimental and observational approaches to: first, identify patterns of body size variation in leaf-litter anurans; second, assess how coloration and body size variation in a territorial and common …
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The female anuran reproductive system in relation to reproductive mode / by Philippa Horton
Offprints of the author's articles inserted
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Analyzing anuran diversity in urban and rural wetlands using frog call citizen science data
… was a difference in diversity and abundance of anurans in urban wetlands compared to rural wetlands in the Ridge and Valley ecoregion. A Hutchenson’s t-test and a Mann-Whitney U test found that the diversity scores of the two groups were not equal, with the rural wetlands having significantly …
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Chemical communication in a declining North American anuran amphibian, the northern leopard frog (lithobates pipiens)
… have directly investigated chemical signaling in anuran groups (frogs and toads), particularly adult anurans. Previous work has focused primarily on salamander and larval anuran behavioral responses. Additionally, chemoreceptor (CR) genes have only been identified for Xenopus species with no …
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Development and assessment of predictive spatial models for a rare Tennessee anuran: Barking treefrog (Hyla gratiosa)
In Tennessee, the Barking Treefrog (Hyla gratiosa) is listed as both rare and vulnerable, and more field data is needed to elucidate its distribution. Predictive modeling using the program MaxEnt provided results for models that guided field sampling to potential presence locations. From …
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A Comparison of Current Anuran Monitoring Methods with Emphasis on the Accuracy of Automatic Vocalization Detection Software
… a variety of methods are available to monitor anurans, and little standardization of methods exists. New methods to monitor anurans have become available over the past twenty years, including PVC pipe arrays used for tree frog capture and Automated Digital Recording Systems (ADRS) used to …
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Anura of Eastern South Dakota: Their Distribution and Characteristics of Their Wetland Habitats, 1997-1998
… wetlands used by breeding Anura and to determine anuran distribution within eastern South Dakota. The chorus frog (Pseudacris triseriata triseriata and P. t. maculata), northern leopard frog (Rana pipiens) and great plains toad (Bufo cognatus) were cosmopolitan in distribution occurring in all 44 …
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Spatial distribution of anuran assemblages from Caxiuanã, Brazil : testing the riverine barrier hypothesis and the influence of life-history traits
… by numerous researchers over 20 years on anuran assemblages along the Caxiuanã River in Para, Brazil, differences in local assemblage composition were investigated to test the riverine barrier effect. After accounting for sampling bias, the present work shows that anuran composition varies …
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From genes to species: Characterizing spatial and temporal variation in frog and toad multidimensional biodiversity
… sampling on population genetic inference in an anuran metapopulation (Arizona treefrog, Hyla (Dryophytes) wrightorum). I found that a single sample year captures global, but not local, population genetic dynamics, as there is considerable temporal variation in genetic metrics within individual …
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Non-Ranid Anurans of the Mio-Pliocene Gray Fossil Site, Tennessee
… the site, recovered an extensive collection of anuran fossil elements. Until recently, these specimens have not been analyzed. The purpose here is the examination, description, and identification of all non-ranid anuran (frogsand toads) material using the following elements: ilium, urostyle, …
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Visual Opsin Diversity in Anurans
<p>Among major vertebrate groups, anurans are understudied with regards to their visual systems and how they function. This study sampled North American anurans representing diverse evolutionary and life histories and which likely possess visual systems adapted to meet different ecological needs. …
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Survey and Comparison of Amphibian Assemblages in Two Physiographic Regions of Northeast Tennessee.
… <p>Nine caudate (Plethodontidae) and one anuran species (Ranidae) were found in John's Bog. Seven caudate (Ambystomatidae, Plethodontidae, Salamandridae) and five anuran species (Hylidae, Ranidae) were found in Henderson Wetland. Assemblages were compared using an index of community …
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Diversity and ecology of anurans at selected streams in Taman Negara Johor Endau Rompin, Malaysia
… Encounter Survey (VES) method. Twenty species of anurans, belonging to 15 genera and five families, were documented in this study. Ranidae is the richest families, followed by Bufonidae, Microhylidae, Dicroglossidae and Rhacophoridae. In addition, an updated checklist of anuran fauna has been …
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Nuclear Characteristics of Cells and Organisms Exposed to Agrochemicals Contaminating Aquatic Ecosystems
… developed cytogenetic technique for use in anurans. The primed in situ labeling (PRINS) technique was applied to localize a specific developmentally important DNA sequence in anuran chromosomes. This technique has the potential to be an important tool in assessing developmental nuclear …
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Pharmacological effects of a bufadienolide isolated from the toad Bufo boreas halophilus
… toxins in glands scattered over the skin .Many anuran amphibians have parotoid glands located on the lateral ,anterior ldorsal surface which are apparently specialized for the secretion of large quantities of toxin. W'eiss(1899) and Muhse(1909) describe the histology of these glands.</p>
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