Grass carp, acclimated at 24 °C, were tested for temperature preference in a laboratory, horizontal gradient tank. After a 6-day period of exploration the grass carp gravitated to a final thermal preferendum of 35 °C. In the temperature tolerance test the ultimate upper incipient lethal temperature (TL50), was estimated as 41.5°C. The results are compared to those of a similar study with hybrid carp (female grass carp x male bighead carp).
Galloway, Marvin L. and Kilambi, Raj V.
"Temperature Preference and Tolerance of Grass Carp (Ctenopharyngodon idella),"
Journal of the Arkansas Academy of Science: Vol. 38
, Article 11.
Available at: http://scholarworks.uark.edu/jaas/vol38/iss1/11