ENVIRONMENTAL TEMPERATURE AND BODY FLUID SYSTEM OF FRESH-WATER TELEOST .3. HEMATOLOGY AND BLOOD VOLUME OF THERMALLY ACCLIMATED BROOK TROUT SALVELINUS FONTINALIS

1. 1. Hematological and plasma and blood volume variations associated with the thermoacclimatory process have been investigated in brook trout, Salvelinus fontinalis. 2. 2. Warm-adapted trout were characterized by larger numbers of somewhat smaller erythrocytes than cold-acclimated animals. Mean cellular hemoglobin was stable, but total oxygen content increased as a consequence of changes in plasma and blood volume. 3. 3. The data are discussed in terms of their bearing upon metabolic compensation at high temperature. © 1969.