Abstract: In order to understand temperature tolerance and respiratory metabolism of Palaemonetes sinensis, effects of temperature on survival and oxygen consumption rate (OCR), ammonia excretion rate (AER), asphyxiation point (AP) of P. sinensis were studied in laboratory. The results showed that P. sinensis possessed strong temperature tolerance. Tolerance range of temperature was 0-37 ℃. In low temperature groups, P. sinensis began to decrease activity when temperature fell to 5 ℃ and lost motor ability at 0 ℃. All shrimps were dead after keeping 6 h at 0 ℃ then transferring to room temperature. In high temperature groups, P. sinensis began to decrease activity when temperature increased to 31 ℃ and an abnormal reaction appeared at 34 ℃. Some of shrimps died at 37 ℃ and all shrimps were dead when temperature increased to 39 ℃. Temperature had extremely significant effects on OCR, AER and AP (P <0.01). The OCR and AER of P. sinensis increased with the increase of temperature at 10-30 ℃. Regression analysis showed that OCR and AER had a significant linear correlation with temperature. The equations were OCR=-0.077+0.018^T (R²=0.955) and AER=-0.008+0.002^T (R²=0.915), respectively. With increasing temperature, AP of P. sinensis increased at first and decreased subsequently. The range of AP was 0.19-0.31 mg·L^-1 at 10-30 ℃. The range of O/N ratio at different temperatures was 7.61-13.24, indicating that P. sinensis took protein as the major energy source and fat as secondary.

Key words: MaxEnt model, Lesser Xing’an Mountains., forest management, Cervids, suitable habitat