Freeze tolerance and intolerance as strategies of winter survival in terrestrially-hibernating amphibians.

  title={Freeze tolerance and intolerance as strategies of winter survival in terrestrially-hibernating amphibians.},
  author={Kenneth B. Storey and Janet M Storey},
  journal={Comparative biochemistry and physiology. A, Comparative physiology},
  volume={83 4},
  • K. Storey, J. M. Storey
  • Published 1986
  • Biology, Environmental Science
  • Comparative biochemistry and physiology. A, Comparative physiology
Persistence of freeze tolerance in terrestrially hibernating frogs after spring emergence
It is found that Rana sylvatica, Hyla versicolor, H. crucifer, and Pseudacris triseriata were as tolerant of whole body freezing in early spring as they were in autumn or winter, based on survival at -2.5 C, but the capacity for producing cryoprotectants in response to the initiation of freezing was generally reduced in spring animals.
Freezing tolerance/intolerance and cryoprotectant synthesis in terrestrially overwintering anurans in the Great Plains, USA
Winter increment of liver phosphorylase activity that is correlated with the development of freezing tolerance is exhibited in Pseudacris triseriata, but not B. cognatus, suggesting that capacity for mobilizing glucose from liver glycogen is associated with freezing tolerance.
Natural freeze tolerance in ectothermic vertebrates.
This review focuses on one strategy of winter cold hardiness: freeze tolerance of terrestrially-hibernating reptiles and amphibians.
Molecular Physiology of Freeze Tolerance in Vertebrates.
Recent advances in the understanding of amphibian and reptile freeze tolerance with a focus on cell preservation strategies, membrane transporters for water and cryoprotectants, energy metabolism, gene/protein adaptations, and the regulatory control of freeze-responsive hypometabolism at multiple levels are providing a much more complete picture of life in the frozen state.
Freeze Tolerance and Freeze Avoidance in Ectotherms
The vast majority of ectothermic animals on earth must elude exposure to subzero temperatures to prevent the lethal freezing of body fluids. For this reason the northern ranges of many ectotherms are
Physiological and ecological aspects of low-temperature tolerance in embryos of the wood frog, Rana sylvatica
Wood frogs breed in late winter in temporary ponds, where eggs are deposited in communal surface rafts, and developing embryos may face subzero temperatures, and individual embryos supercooled moderately in the laboratory, but did not resist inoculative freezing when chilled in contact with external ice.
Seasonal variation in freeze tolerance and ice content of the tree frog Hyla versicolor.
It is evident that in preparation for overwintering, frogs reduce the amount ofIce formed at a given subzero temperature, but there is little indication of a substantial change in the total amount of ice tolerated.
Freezing tolerance of the European water frogs: the good, the bad, and the ugly.
The variation of freezeolerance between these three closely related species could bring understanding to the physiological processes involved in the evolution of freeze tolerance in vertebrates.
Overwintering Physiology and Hibernacula Microclimates of Blanchard's Cricket Frogs at Their Northwestern Range Boundary
Blanchard's Cricket Frogs in the central portion of their range show minimal capacities for freezing tolerance and survive overwinter by using terrestrial hibernacula where they avoid freezing, however, frogs may exhibit greater freeze-tolerance capacity at high latitude range limits, where winter climate is more severe.
Freeze tolerance and cryoprotectant mobilization in the gray treefrog (Hyla versicolor).
  • J. R. Layne
  • Biology
    The Journal of experimental zoology
  • 1999
Glycerol clearly was a major component of cryo-protectant production in these frogs, which was likely essential to their freeze tolerance and an inverse relationship was observed between plasma osmolality and ice content.


Adaptations of metabolism for freeze tolerance in the gray tree frog, Hyla versicolor
Biochemical adaptations allowing the natural survival of extracellular freezing were examined in the gray tree frog, Hyla versicolor, and activities of most enzymes increased with freezing exposure a...
Freezing resistance in intertidal invertebrates.
  • D. Murphy
  • Biology, Environmental Science
    Annual review of physiology
  • 1983
A rise in blood calcium concentration following a shift from aerobic to anaerobic metabolism can account for part of the increased resistance of an intertidal mollusk to greater quantities of tissue ice, while membrane changes and factors that reduce the toxic effects of oxygen may also be involved.
Freeze tolerant frogs: cryoprotectants and tissue metabolism during freeze–thaw cycles
Tissue-specific metabolism in the freeze tolerant frog, Rana sylvatica, was monitored over a course of 3 days of freezing exposure at −2.5 °C followed by 11 days of thawing at 3 °C to indicate this organ as the major site of cryoprotectant production during freezing.
Survival of frogs in low temperature.
An accumulation of glycerol during winter was correlated with frost tolerance, indicating that this compound is associated with natural tolerance to freezing in a vertebrate.
Cold hardiness in invertebrate poikilotherms
  • W. Block
  • Biology, Environmental Science
  • 1982
National Audubon Society Field Guide to North American Reptiles and Amphibians
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