不同温度及突变方式对菲律宾蛤仔耗氧率的影响

本研究采用静水法测定了不同温度及急性温度突变对菲律宾蛤仔耗氧率的影响，分别在5个恒定温度（15、20、25、30和35℃）以及4个急性温度突变（分别由25℃突变至15、20、30和35℃）条件下测定了菲律宾蛤仔的耗氧率。试验结果表明，温度对菲律宾蛤仔的耗氧率具有显著性影响（P＜0.05）。在温度为15～30℃内时，耗氧率随温度的升高而逐渐增大，随着温度的继续升高达到35℃时耗氧率开始下降。方差分析表明，耗氧率在15℃时最低，与20℃组和35℃组之间差异不显著（P＞0.05）；在30℃时耗氧率最大，与25℃组无显著性差异，但显著高于15℃和20℃组（P＜0.05）。温度突变后菲律宾蛤仔耗氧率相比于恒温状态下均出现不同程度提高，说明温度骤变环境下菲律宾蛤仔要消耗更多的能量。

Effect of different temperatures and abrupt change on oxygen consumption rate of Ruditapes philipppinarum

The oxygen consumption rate of R. philipppinarum was studied under different tempera-tures and abrupt change in laboratory by means of ecological methods. 5 constant temperatures （15 ℃, 20 ℃, 25 ℃, 30 ℃ and 35 ℃） and 4 abrupt changes（changing from 25 ℃ to 15 ℃, 20 ℃, 30 ℃ and 35 ℃, respectively） were set. The results showed that temperature had significant ef-fects on the oxygen consumption, the oxygen consumption increased with the increase of water tem-perature from 15 ℃ to 30 ℃ and reached to the maximum at 30 ℃. However, when the water tempera-ture was higher than 30 ℃, oxygen consumption rate of R. philipppinarum decreased. As a whole, the highest and the lowest of oxygen consumption rate appeared at 30 ℃ and 15 ℃, respectively. The differences among 15 ℃, 20 ℃, 35 ℃ were not significant（P＆gt;0.05）, and among 25 ℃, 30 ℃, 35 ℃ were not significant（P＆gt;0.05）, however, the oxygen consumption rate of 25 ℃ and 30 ℃ were significantly higher than 15℃ and 20 ℃（P＆lt;0.05）. The oxygen consumption rates of R. philipppina-rum after temperature change were all higher than the same constant temperatures, suggesting that more energy would be used when subjected to abrupt temperature change.