Risk Assessment and Anti-Predator Behavior of Wood Frog (Rana sylvatica) Tadpoles: A Comparison with Green Frog (Rana clamitans) Tadpoles

2010 ◽  
Vol 44 (3) ◽  
pp. 390-398 ◽  
Author(s):  
Michael E. Fraker
Keyword(s):  
Risk Assessment ◽  
Rana Sylvatica ◽  
Wood Frog ◽  
Rana Clamitans ◽  
Green Frog ◽  
Predator Behavior

Growth of the Wood Frog, Rana sylvatica

Copeia ◽  
1961 ◽  
Vol 1961 (1) ◽  
pp. 74 ◽  
Author(s):  
Edward D. Bellis
Keyword(s):  
Rana Sylvatica ◽  
Wood Frog

Distribution of the middorsal stripe dimorphism in the wood frog, Rana sylvatica, in eastern North America

1980 ◽  
Vol 58 (9) ◽  
pp. 1643-1651 ◽  
Author(s):  
Frederick W. Schueler ◽  
Francis R. Cook
Keyword(s):  
United States ◽  
North America ◽  
Rana Sylvatica ◽  
Wood Frog ◽  
Eastern North America ◽  
Hudson Bay ◽  
Northeastern United States ◽  
Southern Ontario ◽  
Maritime Canada ◽  
Eurasian Species

The frequency of the middorsally striped morph of Rana sylvatica in Ontario and Manitoba varies from absence in southern Ontario to 80% on the coast of Hudson Bay, with a general value of 20–30% in the boreal forest, a rise to 50% on the forest–grassland ecotone in southern Manitoba, and a decline westward to 20% on the edge of the prairies. This morph is rare in the northeastern United States and Maritime Canada. The suggested relationship between its frequency and the "grassiness" of the background on which predators view it is reexamined, and it is suggested that a linkage with earlier transformation as demonstrated in Eurasian species may explain certain anomalies.

The occurrence of chronic hypocalcemia following parathyroidectomy in the green frog, Rana clamitans

1990 ◽  
Vol 80 (3) ◽  
pp. 419-426 ◽  
Author(s):  
Lawrence W. Wittle ◽  
Ralph S. Augostini ◽  
William S. Chizmar
Keyword(s):  
Rana Clamitans ◽  
Green Frog

Characterization of Gene Expression Endpoints During Postembryonic Development of the Northern Green Frog (Rana clamitans melanota)

2013 ◽  
Vol 30 (5) ◽  
pp. 392 ◽  
Author(s):  
S. Austin Hammond ◽  
Nik Veldhoen ◽  
Marek Kobylarz ◽  
Nicholas R. Webber ◽  
Jameson Jordan ◽  
...  
Keyword(s):  
Gene Expression ◽  
Postembryonic Development ◽  
Rana Clamitans ◽  
Green Frog

Freeze-thaw injury in erythrocytes of the freeze-tolerant wood frog, Rana sylvatica

1991 ◽  
Vol 261 (6) ◽  
pp. R1346-R1350 ◽  
Author(s):  
J. P. Costanzo ◽  
R. E. Lee
Keyword(s):  
Cell Injury ◽  
Osmotic Fragility ◽  
Rana Sylvatica ◽  
Freeze Tolerance ◽  
Wood Frog ◽  
In Vitro Tests ◽  
Freezing And Thawing ◽  
Freeze Tolerant ◽  
High Concentrations

Erythrocytes from the freeze-tolerant wood frog (Rana sylvatica) were subjected to in vitro tests of freeze tolerance, cryoprotection, and osmotic fragility. The responses of cells from frogs acclimated to 4 or 15 degrees C were similar. Erythrocytes that were frozen in saline hemolyzed at -4 degrees C or lower. The addition of high concentrations (150 and 1,500 mM) of glucose or glycerol, cryoprotectants produced naturally by freeze-tolerant frogs, significantly reduced cell injury at -8 degrees C, but concentrations of 1.5 or 15 mM were ineffective. Hemolysis was reduced by 94% with 1,500 mM glycerol and by 84% with 1,500 mM glucose; thus glycerol was the more effective cryoprotectant. Mean fragility values for frog erythrocytes incubated in hypertonic and hypotonic saline were 1,938 and 49 mosM, respectively. Survival in freeze tolerance and cryoprotection experiments was comparable for erythrocytes from frogs and humans, suggesting that these cells may respond similarly to freezing-related stresses. However, the breadth of osmotic tolerance, standardized for differences in isotonicity, was greater for frog erythrocytes than for human erythrocytes. Our data suggest that erythrocytes from R. sylvatica are adequately protected by glucose under natural conditions of freezing and thawing.

Enzymatic regulation of seasonal glycogen cycling in the freeze-tolerant wood frog, Rana sylvatica

2016 ◽  
Vol 186 (8) ◽  
pp. 1045-1058 ◽  
Author(s):  
M. Clara F. do Amaral ◽  
Richard E. Lee ◽  
Jon P. Costanzo
Keyword(s):  
Rana Sylvatica ◽  
Wood Frog ◽  
Enzymatic Regulation ◽  
Freeze Tolerant
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