a Laboratory of Marine Biodiversity, Graduate School of Fisheries Science, Hokkaido University, Hakodate 041-8611, Japan.
Lethal limits of high temperature for two crayfishes, the native species Cambaroides japonicus and the alien species Pacifastacus leniusculus in Japan
Article first published online: 2 AUG 2002
Volume 68, Issue 4, pages 763–767, August 2002
How to Cite
NAKATA, K., HAMANO, T., HAYASHI, K.-I. and KAWAI, T. (2002), Lethal limits of high temperature for two crayfishes, the native species Cambaroides japonicus and the alien species Pacifastacus leniusculus in Japan. Fisheries Science, 68: 763–767. doi: 10.1046/j.1444-2906.2002.00491.x
- Issue published online: 2 AUG 2002
- Article first published online: 2 AUG 2002
- Cambaroides japonicus;
- lethal temperature;
- Pacifastacus leniusculus;
ABSTRACT: Lethal limits of high temperature were studied to clarify the effects on the survival of the endangered Japanese crayfish species Cambaroides japonicus and the alien species Pacifastacus leniusculus. After the acclimation period for 2 weeks at 16°C, the temperature was raised at a rate of 1°C per week. As a result, the ultimate upper lethal temperatures of C. japonicus and P. leniusculus were 27.0 and 31.1°C, respectively, and the lethal temperature for P. leniusculus was significantly higher than for C. japonicus. The natural distributions of these two species are discussed in terms of the temperature tolerance.