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Showing 1 to 10 of 10 for “"Hyla versicolor."”.
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Scale dependent processing of conspecific signals in the gray treefrog Hyla versicolor
… of natural signals in the eastern grey treefrog, Hyla versicolor. During the mating season, numerous males gather near water sources and form choruses, emitting a stereotyped advertisement calls, creating a challenging auditory environment. Females later approach the chorus from daytime resting …
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Distinguishing the Treefrogs "Hyla versicolor" and "Hyla chrysoscelis" in Iowa, and Their Distributions
… and diploid species pair of treefrogs, "Hyla versicolor" and "Hyla chrysoscelis" have been mapped collectively in Iowa because no distinguishing macroscopic morphological characteristics useful in recognizing the two species had been found. The present study reports identification and …
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The influence of ploidy level on the hearing sensitivity of the sister species Hyla chrysoscelis and Hyla versicolor
… of hearing. The North American gray treefrogs, Hyla chrysoscelis and Hyla versicolor, are nearly identical with the exception that the latter is tetraploid. Morphology, hearing performance, and histology of the ears were assessed to identify differences in the tuning and sensitivity of hearing …
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Changes in the Distribution of "Acris crepitans blanchardi", with Studies of Nesting Microhabitat and the Possible Impact of Ultraviolet-B Radiation
… crepitans", "Ambystoma", "Bufo americanus", "Hyla versicolor complex", "Pseudacris triseriata", and "Rana pipiens". The eggs were subjected to three different light treatments, allowing full transmittance of light, blocking out UV-B and lower wavelengths, and blocking out lower than UV-B …
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Quantifying Metagonimoides oregonensis infection distribution and effects among stream salamander hosts
… of D. quadramaculatus, Eurycea wilderae and Hyla versicolor. I did not see any effect on locomotor performance for any of the species.
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Aggressive calling in treefrogs
… call timing interactions. In the gray treefrog Hyla versicolor, a common North American species, I staged interactions between males in order to examine the determinants of success and the level of escalation in contests. I specifically compared aggressive call characteristics of winners and …
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Effects of the aquatic to terrestrial habitat ratio on an amphibian predator and its prey
… species, tadpoles of grey tree frogs: <italic>Hyla versicolor</italic>) and Blandchard's cricket frogs: <italic>Acris crepitans</italic>) to the presence and absence of predatory laval <italic>A. maculatum</italic> in large-scale experimental ponds. These prey species have very different …
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Gonadal histology and reproductive steroidogenesis of anurans exposed to potential endocrine disrupting contaminants
… tadpole growth and developmental rates for Hyla versicolor, but not for Rana pipiens, whereas atrazine exposure did not result in altered gonadal development for either species. None of the H. versicolor metamorphs exhibited gonadal abnormalities, while testicular oocytes occurred in R. …
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Abiotic Factors Underlying Stress Hormone Level Variation Among Larval Amphibians
… wood frog (Rana sylvatica), and grey treefrog (Hyla versicolor). Chapter II examined corticosterone level differences throughout development in A. jeffersonianum and R. sylvatica larvae under field, mesocosm, and laboratory venues. Baseline corticosterone levels in R. sylvatica increased near …
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Anura of Eastern South Dakota: Their Distribution and Characteristics of Their Wetland Habitats, 1997-1998
… counties, along with the eastern grey treefrog (Hyla versicolor) and Cope's grey treefrog (Hyla chrysoscelis) occurring locally in this same area. Although no significant relationships existed between anuran occurrence and water regimes, seasonal and semipermanent wetlands provided habitat for …