关键词: 西伯利亚鲟, 低温, 心律, 鳃动频率, 无水运输

Abstract: The heart beating frequency, gill ventilating frequency and survival were observed in the Siberian sturgeon （marketable fish with mean body weight of 1.09± 0.58kg, and mean body length of 60.1 ±6.13cm, and juveniles with mean body weight of 24.69± 5.14g, and body length of 19.27± 2.43） exposed to acute changes in temperature from 25 ℃ to 1-2℃ without water during the acute cooling, and the recovery process, and at 2℃. It was found that the Siberian sturgeon had a decline heart beating intensity, and then showed decrease in heart beating frequency. The gill ventilating frequency was found to change from 75 times / min gradually to 0 times / min, without linear relationship with the heart beating rate. In the recovery process, the heart beating pattern was shown to have a similar tendency to the fish in low temperature, with the enhanced strength and increase in the heart beating frequency. The juveniles sturgeon was shown to recovery at water temperature of about 12 ℃-15 ℃, and to irritate, rapid swimming, floating heads out of the water, and even death 3h later, mortality up to 100%, at water temperature of higher than 18 ℃. It is suggested that the juvenile Siberi- an sturgeon transportation at low temperature without water be carried out under gradual temperature enhancement for less than 12h.

Key words: Siberian sturgeon low temperature stress heart beating frequency gill ventilating frequency dry transportation