THE EFFECT OF TEMPERATURE ON THE ACTIVITY OF BLUEFISH,<i>POMATOMUS SALTATRIX</i>L

Abstract

1. The swimming speed of the bluefish increased as temperature increased or decreased from acclimation levels of 19-20° C. 2. As the temperature approached 11.9° C and 29.8° C, there were significant changes in average swimming speed and schooling which were considered to be indicative of stress. 3. The daily rhythmic activity was not well-defined at stress temperatures. 4. As the temperature departed from stress levels toward acclimation, swimming speed dropped significantly and the daily rhythm of activity returned.