Abstract: Different populations of sea cucumber Apostichopus japonicus juveniles were kept at below 0 ℃ with the lowest temperature of -2 ℃ ,at dissolved oxygen content of 7.5 - 10.5 mg/L and a pH value of 7.30 -8.20 for48 - 57 days to elucidate the effects of low temperature on different populations of juveniles, including China population（C）, Russia population（ R）, hybrid population（ C × R）, and Korean population（K）. The evisceration, ulceration and mortality were observed at low water temperature. The juveniles began to show shrinkage and immovability and stopped feeding at water temperature of below 1. 8 - 1. 0 ℃. In low temperature condition, the mortalities of different populations of sea cucumber juveniles weighing （0. 813 ± 0.043 ）g ranged in a descendant order as： R♀× C ♂ 〉 C ♀ × R ♂ 〉 R × R 〉 C × C 〉 K × K, the maximum （95.8%） in Korean population and the minimum （20.8%） in the hybrids（ R ♀ × C♂ ）. The three China population juveniles weighing 0.21, 0.8 g and 2.00 g had mortality rates of 73.5%, 16.7% and 10.0%, respectively, indicating that the large sea cucumber had higher survival rate than the small one did. The sea cucumber appeared recovery viability, and regeneration of slight ulcerative skin when it rose to 14.0 ℃ after low temperature administration.
于明志, 常亚青. 低温对不同群体仿刺参幼参某些生理现象的影响[J]. 大连海洋大学学报, 2008, 23(1): 31-36.
YU Ming-zhi, CHANG Ya-qing. The effects of low temperature on some physiological phenomena in different populations of sea cucumber Apostichopus japonicus juveniles. Journal of Dalian Ocean University, 2008, 23(1): 31-36.
2008, Vol. 23 
