712 COX 



1969). Ferguson (1958) and Coutant (1977) reported good general 

 agreement between temperature preference determined in the labora- 

 tory and in the field, but a wide species-specific temperature 

 distribution range is also observed in the field. Field observations 

 made by Coutant and Carroll (unpublished data) of striped bass 

 tagged with ultrasonic temperature sensors indicated lower and upper 

 avoidance temperatures of only 21 and 24°C despite nearby 

 temperatures of 16 to 32° C. If temperatures in the general range of 

 the preferred temperature are available, fish may be able to avoid the 

 degree of variation tested in this study. The behavioral aspects of the 

 species in the field and the responses to smaller fluctuations at base 

 temperatures different from those tested here must be determined 

 before any realistic predictions of acclimation state caused by general 

 environmental temperature fluctuations can be confidently made. 



ACKNOWLEDGMENTS 



The research reported here was sponsored by the Division of 

 Biomedical and Environmental Research, U. S. Department of 

 Energy, under contract W-7405-eng-26 with Union Carbide Corpora- 

 tion. This is publication No. 1243, Environmental Sciences Division, 

 Oak Ridge National Laboratory. 



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