Reports

Freezing Resistance in Some Antarctic Fishes

Science  07 Mar 1969:
Vol. 163, Issue 3871, pp. 1073-1075
DOI: 10.1126/science.163.3871.1073

Abstract

Measurements of serum freezing points in three Antarctic marine fishes indicated that they do not freeze in the -1.87°C seawater because their blood is isosmotic to seawater. Concentrations of sodium chloride, urea, and free amino acids in the serum accounted for only half of the freezing-point depression of the serum. A protein containing carbohydrate was isolated which accounted for 30 percent of the freezing-point depression of the serum.

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