Polychlorinated biphenyls and toxaphene in Pacific tree frog tadpoles (Hyla regilla) from the California Sierra Nevada, USA

2002 ◽  
Vol 21 (10) ◽  
pp. 2209-2215 ◽  
Author(s):  
Jeffrey E. Angermann ◽  
Gary M. Fellers ◽  
Fumio Matsumura
Keyword(s):  
Polychlorinated Biphenyls ◽  
Sierra Nevada ◽  
Tree Frog ◽  
Hyla Regilla ◽  
Frog Tadpoles

scholarly journals The mechanics of air breathing in gray tree frog tadpoles, Hyla versicolor (Anura: Hylidae)

2020 ◽  
Vol 223 (5) ◽  
pp. jeb219311
Author(s):  
Jackson R. Phillips ◽  
Amanda E. Hewes ◽  
Kurt Schwenk
Keyword(s):  
Hyla Versicolor ◽  
Tree Frog ◽  
Air Breathing ◽  
Frog Tadpoles ◽  
Gray Tree Frog

The control of color change in the Pacific tree frog, Hyla regilla

2004 ◽  
Vol 82 (6) ◽  
pp. 889-896 ◽  
Author(s):  
James C Stegen ◽  
C M Gienger ◽  
Lixing Sun
Keyword(s):  
Light Intensity ◽  
Environmental Variables ◽  
Color Change ◽  
Interactive Effects ◽  
Tree Frog ◽  
Background Color ◽  
Hyla Regilla ◽  
Background Matching ◽  
The Pacific ◽  
Initial Color

A number of environmental variables have been identified as affecting anuran color, but rarely have the interactions between these variables been investigated. In attempt to elucidate the function of color change, we conducted a within-subject, full factorial experiment designed to determine the simple and interactive effects of background, temperature, and light intensity on the rate of color change in the Pacific tree frog (Hyla regilla Baird and Girard, 1852). Color was investigated holistically, as well as by decomposing it into its constituent parts (hue, chroma, and lightness), using digital photography. The rate of color change was faster on the green versus the brown background, at 10 versus 25 °C, and at low versus high light intensity. There was also a significant effect of the interaction between background color and temperature on the rate of color change. We found increased rates of hue, chroma, lightness, and color change with increasing initial hue, chroma, lightness, and color distances between the Pacific tree frog and its background, respectively. In addition, initial color distance covaried with changes in environmental variables. After controlling for initial color distance, and thus the effects of background matching, background color and temperature still showed a significant interaction for their effects on rate of color change. These results suggest that crypsis (i.e., background matching) is not the only function of physiological color change in H. regilla. Physiological color change may also be used to hydro- and (or) thermo-regulate.

Hind Limb Anomalies of a Western Montana Population of the Pacific Tree Frog, Hyla regilla Baird and Girard

Copeia ◽  
1963 ◽  
Vol 1963 (3) ◽  
pp. 570 ◽  
Author(s):  
William B. Hebard ◽  
Royal Bruce Brunson
Keyword(s):  
Hind Limb ◽  
Western Montana ◽  
Tree Frog ◽  
Hyla Regilla ◽  
Limb Anomalies ◽  
The Pacific

The hypothalamic neurosecretory system of the tree frog Hyla regilla

1957 ◽  
Vol 107 (2) ◽  
pp. 253-271 ◽  
Author(s):  
Lowell D. Wilson ◽  
J. Arthur Weinberg ◽  
Howard A. Bern
Keyword(s):  
Neurosecretory System ◽  
Tree Frog ◽  
Hyla Regilla ◽  
Hypothalamic Neurosecretory System

scholarly journals First record of Colombian red-eyed tree frog Agalychnis terranova from the Sierra Nevada de Santa Marta, Colombia with a description of its advertisement call

2021 ◽  
pp. 23-27
Author(s):  
Giovanni A. Chaves-Portilla
Keyword(s):  
Sierra Nevada ◽  
Total Duration ◽  
First Record ◽  
Dominant Frequency ◽  
Advertisement Call ◽  
Tree Frog ◽  
North West ◽  
The Pacific ◽  
Magdalena River ◽  
First Time

Based on collected specimens and phylogenetic information, we provide the first record of the Colombian redeyed tree frog, Agalychnis terranova, from the Sierra Nevada de Santa Marta in northern Colombia. This species is known from several localities on the middle Magdalena river valley and the Pacific lowlands. With this new record, the known geographic distribution of this frog is extended about 370 km north-west from its previous northernmost record. Additionally, we describe for the first time the tonal advertisement call of this species, which consisted of one or two notes with a total duration of 0.52 s and dominant frequency of about 1.74 kHz.

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