| 摘要: |
| 以半现场流水槽法研究了不同盐度(5、10、15、20、25、30、35)对近江牡蛎(Crassostrea hongkongensis)耗氧率、排氨率、O:N、吸收率的影响, 并测定了盐度为20 条件下牡蛎耗氧率和排氨率的周日变化。结果表明, 近江牡蛎耗氧率、排氨率、O:N 先随着盐度的升高而下降, 在20 左右降到最低, 随着盐度继续上升, 又升高; 而近江牡蛎的吸收率先随着盐度的升高而升高, 在20 左右达到最高,然后随盐度升高而下降。根据数据得出耗氧率与盐度的拟合方程: y=0.0033x2－0.1161x＋ 1.5523,R2=0.9018; 排氨率与盐度: y=0.0001x2－0.0041x＋0.0871, R2=0.9889; O:N 与盐度: y=0.0016x3－0.0782x2＋0.9051x＋10.818, R2= 0.955; 吸收率与盐度: y=－0.0011x2＋0.0399x＋0.4393。R2=0.9453。一日内, 8时、14 时、19 时、22 时4 个时间点, 近江牡蛎耗氧率和排氨率变化较大, 在14 时最大, 表明该时点其代谢活动最强。 |
| 关键词: 近江牡蛎(Crassostrea hongkongensis) 盐度 流水槽 半现场法 耗氧率 排氨率 O:N 吸收率 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院知识创新工程重要方向项目(KZCX2-YW-Q07-03) |
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| Effects of sanility on oxygen consumption, ammonia-N excretion rate, O:N and absorption efficiency of Crassostrea hongkongensis |
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| Abstract: |
| A running water tank method (semi-in situ method) was used to study the effect of different salinity (5, 10, 15, 20, 25, 30, 35) on RO (Oxygen consumption rate), RN (Ammonia-N excretion rate), O:N, AE (Absorption efficiency) of Oyster(Crassostrea hongkongensis). The variation of RO and RN at different time points under the salinity of 20 was studied. It was shown that RO, RN and O:N decreased with the raise of salinity between 5～20 and then increased with the raise of salinity between 20～35. In contrast, the AE increased with the raise of salinity, and decreased when salinity is over 20. According to the experimental data, we got equation between RO and salinity: y=0.0033x2–0.1161x+1.5523, R2=0.9018; between RN and salinity: y=0.0001x2–0.0041x+0.0871, R2=0.9889; between O:N and salinity: y=0.0016x3–0.0782x2+0.9051x+10.818, R2=0.955; between AE and salinity: y=–0.0011x2+0.0399x+0.4393, R2=0.9453. The results showed that the changes of RO and RN were relative significant at the four time points (8:00, 14:00, 19:00 and 22:00) with the maximum values at 14 o’clock, suggesting the metabolic activity was highest at this time point. |
| Key words: Oyster(Crassostrea hongkongensis) salinity running water tank semi-in situ method oxygen consumption rate ammonia-N excretion rate O:N absorption efficiency |
