|Document Type:||Journal Article|
|Title:||Growth temperature requirements and lower lethal temperatures for juvenile smallmouth bass (Micropterus dolomieui)|
|Author:||W. B. Horning, Roger E. Pearson|
|Journal:||Journal of the Fisheries Research Board of Canada|
Maximum growth rate of juvenile smallmouth bass (Micropterus dolomieui), grown at constant temperatures of 16, 23, 26, 29, 32, and 35°C, occurred at approximately 26°C. Fish held at 35°C demonstrated a negative growth rate. The average 96–hr low temperature TL50 values (median tolerance limit) varied from 1.6 to 10.1°C for smallmouth bass acclimated to 15 and 26°C, respectively. Intermediate values were obtained for fish acclimated to 18 and 22°C. An important aspect of the study was the occurrence of a secondary fungous infection on the fish after 96–hr exposure to cold temperatures. In some cases the infection was severe enough to cause complete mortality within 7 days.