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Showing 1 to 20 of 38 for “"Hyla"”.
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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 vocal repertoire of Hyla crucifer
A new, tapered call was discovered in the Hyla crucifer repertoire with the aid of a digital processing oscilloscope. The attack transient was found to be a distinguishing characteristic between the newly discovered tapered call and other calls. Energy requirements for production of the tapered …
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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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Respiratory quotient during metamorphosis of Hyla regilla tadpoles
… of the metabolic reactions in metamorphosing Hyla regilla tadpoles by determining the RQ at various stages of development.</p>
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The effects of stress hormones on preferences for acoustic signals in female green treefrogs (Hyla cinerea) and barking treefrogs (Hyla gratiosa)
… calls in female green treefrogs, <italic>Hyla cinerea<italic>, and barking treefrogs, <italic>Hyla gratiosa<italic>. Specifically, I examined whether administration of corticosterone (CORT) decreases preferences for call rate and/or call duration - two acoustic features that are highly …
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Girinos de espécies de Hyla do grupo "Albosignata" (Amphibia, Anura, Hylidae)
Tadpoles of the five Hyla species belonging to the "albosignata" group were studied and illustrated, and their shared characters used to define the group. Tadpoles of the "albosignata" group were shown to be associated with mountain streams from 800m to higher elevation. Two groups of tadpoles have …
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Sun-compass orientation in the treefrogs, Hyla crucifer and Pseudacris triseriata triseriata
… on adults and larvae of the spring peeper (Hyla crucifer) and the western chorus frog (Pseudacris triseriata triseriata). All animals were tested outdoors in a circular test pool from which all visible landmarks were obscured. Response on the Y-axis varied with the life history stage, and …
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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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Stress, sexual signaling, and alternative mating tactics in male green treefrogs, Hyla cinerea
… mating tactics in male green treefrogs, Hyla cinerea. Males of this species produce acoustic signals that stimulate production of the stress hormone corticosterone (CORT) in vocal competitors, suggesting a role of CORT in intrasexual competition. I predicted that modulation of CORT level …
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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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Aquaglyceroporin Expression and Regulation in Erythrocytes From Freeze Tolerant Cope’s Gray Treefrog, <i>Hyla Chrysoscelis</i>
Cope’s gray treefrog, <i>H. chrysoscelis</i> is a freeze tolerant anuran that accumulates glycerol as a cryoprotectant during cold acclimation. Aquaporins, members of the major intrinsic protein (MIP) family of transmembrane water pores, may play an important role in the mechanism of freeze …
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Estudo da atividade reprodutiva de hyla truncata Izecksohn, 1959 (Anura, Hylidae) na Restinga de Maricá, RJ
The reproductive cycle of Hyla truncata Izecksohn, 1959, was studied based on specimens collected monthly from September 1986 to August 1988. The body, ovaries, oviducts, and fat bodies weights were recorded for each animal. The ovaries and testes were fixed for histological assessment of maturity …
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Taxonomia das espécies de Hyla pertencentes ao grupo de H. Rubicundula Reinhardt & Lutken, 1862 (Amphibia, Anura, Hylidae)
The Hyla rubicundula group is currently composed by three species: H. rubicundula Reinhardt & Lütken. 1862; H. tritaeniata Bokermann. 1965; H. anataliasiasi Bokermann, 1972. We can add to these H. elongata Lutz, 1925, considered junior synonym of H. rubicundula. The absence of strong diagnostic …
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Taxonomia, variação morfológica e distribuição geográfica das espécies do grupo Hyla circumdata (Cope, 1870) (Amphibia, Anura, Hylidae)
The Hyla circumdata species group currently comprises eleven species, which are distributed over mountain stream habitats in Atlantic Tropical Forest, with altimetric range over 500 m. This group is diagnosed by transverse bands on the posterior surface of thighs and hypertrophied prepollex. …
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The Effects Of Acidic Conditions And Tannins On The Survival, Development, And Behavior Of Cope’s Gray Treefrog (Hyla Chrysoscelis)
… development, and anti-predator behavior of Hyla chrysoscelis tadpoles. I conducted a field oviposition study to determine adult female site choice, and reared tadpoles in acidic and tannic conditions to investigate survival and antipredator behaviors. I found that female oviposition site …
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Anfíbios anuros associados às bromeliáceas nos Estados do Rio de Janeiro e Espírito Santo
… Bufo granulosus pygmaeus Myers & Carvalho, Hyla rubra altera B. Lutz, Hyla similis Cochran, Phrynohyas mesophea (Hensel) and Trachycephalus nigromaculatus Tschudi; strict bromeliadicolous: Aparasphenodon brunoi Miranda Ribeiro, Hyla albofrenata A. Lutz, Hyla cuspidata A. Lutz and Hyla …
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Adaptation in a Changing World: Evolutionary mechanisms of salt tolerance in a coastal amphibian
… the unlikely discovery of a freshwater treefrog (Hyla cinerea) inhabiting brackish marshes along the coast of North Carolina to better understand adaptive evolution to a changed environment. The goals of this research are to (1.) examine the extent that salt-exposed, coastal frog populations are …
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Non-Ranid Anurans of the Mio-Pliocene Gray Fossil Site, Tennessee
… neotropical toad), three morphotypes of <i>Hyla</i>(tree frogs), and <i>Pseudacris</i> cf. <i>P. brachyphona</i>(mountain chorus frog). Occurrence of these Anura support a paleoecological environment described as warm, moist, and wooded.</p>
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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 …
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