Clinical blood values of the northern fur seal, Callorhinus ursinus. II. Comparison of fresh versus stored frozen serum.

Analysis of 14 blood components in fresh and stored (107-166 days) frozen serum of the northern fur seal (Callorhinus ursinus) revealed significant changes in the values of all but total protein, globulins, phosphorus and creatinine. While most values decreased during storage, cholesterol and bilirubin showed small but significant increases.