塔玛亚历山大藻对文蛤呼吸和排泄的影响

Effects of Alexandrium tamarense on respiration and excretion of hard clam (Meretrix meretrix Linnaeus)

水温20℃下,设置(0、0.1、0.5、1.0、2.0、4.0)×103/mL六个藻类浓度组,以静水方法研究了塔玛亚历山大藻对文蛤呼吸和排泄的影响。结果表明:当塔玛亚历山大藻浓度为1.0×103/mL时,文蛤的耗氧率和排磷率最大,其最大值分别为2.76×10-3/h和0.339μmol/(g.h);其排氨率在藻浓度为0.5×103/mL时达到最大值5.71μmol/(g.h)。耗氧率与排氨率的比值(O/N)显示在较低塔玛亚历山大藻浓度(≤0.5×103/mL)时,文蛤由蛋白质和脂肪提供机体能量,较高藻浓度(≥1.0×103/mL)时则由脂肪和碳水化合物提供机体代谢所需能量。

The effects of Alexandrium tamarense on respiration and excretion of hard clam （Meretrix meretrix Linnaeus） were studied under the algae concentrations of （0,0.1,0.5,1.0,2.0,4.0） ×10^3/mL at 20℃ in lab static system, respectively. The results showed that the highest oxygen rates of consumption and phosphate excretion were 2.76×10^-3/h and 0. 339μmol/（ g ·h） in the algae concentration of 1.0 ×10^3/mL, the highest ammonia excretion rate was 5.71μmol/（ g ·h） in the algae concentration of 0.5×10^3/mL. Furthermore, the O/N ratio showed that to maintain its standard metabolism, hard clams consumed more fat and protein under lower cell concentration （ ≤0.5 × 10^3/mL）, while more fat and carbohydrate under higher cell concentration （≥1.0 ×10^3/mL）.