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Cold adaptation in marine organisms.

I A Johnston1

  • 1Department of Biology and Preclinical Medicine, University of St Andrews, Fife, Scotland, U.K.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|January 30, 1990
PubMed
Summary

Polar marine animals possess unique adaptations like antifreeze proteins and ice-nucleating proteins to survive extreme cold. However, these specialized adaptations limit their survival in warmer waters and slow their development.

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Area of Science:

  • Marine Biology
  • Physiological Ecology
  • Biochemistry

Background:

  • Polar marine animals have evolved remarkable adaptations to survive sub-zero temperatures and prevent freezing.
  • These adaptations include specialized molecules and physiological strategies to maintain homeostasis in extreme cold.

Purpose of the Study:

  • To review the diverse resistance and capacity adaptations of polar marine organisms to low temperatures.
  • To explore the implications of these adaptations for survival, development, and physiological function.

Main Methods:

  • Literature review of existing research on polar marine animal physiology and adaptations.
  • Analysis of studies on antifreeze proteins, ice-nucleating proteins, and metabolic compensation.

Main Results:

  • Polar fish synthesize antifreeze glycoproteins/peptides for non-colligative freezing point depression.
  • Intertidal invertebrates utilize ice-nucleating proteins for controlled extracellular ice formation.
  • Embryonic development rates are significantly slower in polar species, showing limited temperature compensation.

Conclusions:

  • Specialization to polar conditions often results in an inability to survive higher temperatures.
  • Seasonal antifreeze production in some species is triggered by environmental cues like photoperiod.
  • Low metabolic rates and slow growth in polar species are influenced by temperature and food seasonality.

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