| 摘要: |
| 为优化双齿围沙蚕养殖条件, 促进沙蚕资源的合理开发和利用, 作者探讨了不同盐度下(8、16、24、32、40、45)双齿围沙蚕(Perinereis aibuhitensis)耗氧率和排氨率的情况。结果表明: 盐度对双齿围沙蚕的耗氧率和排氨率均有显著性影响(P<0.05)。在盐度为8～32 时, 耗氧率随着盐度的升高呈先下降后上升的趋势; 在盐度为24 时耗氧率最低(0.22 mg /(g·h)±0.01 mg/(g·h)); 在盐度为32 时耗氧率达到最大值(0.37 mg /(g·h)±0.05 mg /(g·h))。在盐度为8～40 条件下, 沙蚕的排氨率随着盐度的升高呈先降低后上升的趋势; 在盐度为24 时, 双齿围沙蚕的排氨率最低(0.10μmol/(g·h)±0.02 μmol/(g·h)); 当盐度为40 时排氨率达到最大值(0.94 μmol/(g·h)±0.11 μmol/(g·h))。盐度为8～40 时, 沙蚕的O︰N 比值随着盐度的上升呈先升高后降低的趋势, 在盐度24 和32 时, 沙蚕的O︰N 比值分别为130.84 和126.47, 且变化较小, 当盐度40 时, O︰N 比值急剧下降到13.3, 然后再度上升。综合上述结果, 双齿围沙蚕生活的最适盐度为24～32。 |
| 关键词: 双齿围沙蚕(Perinereis aibuhitensis) 盐度 耗氧率 排氨率 |
| DOI：10.11759/hykx20130716002 |
| 分类号: |
| 基金项目:国家海洋公益性行业科研专项子课题(201205009-4) |
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| Effects of salinity on oxygen consumption rate and ammonia-N excretion rate of Perinereis aibuhitensis |
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| Abstract: |
| The oxygen consumption rate and ammonia-N excretion rate of Perinereis aibuhitensis were determined at different salinity (8, 16, 24, 32, 40 and 45) in order to optimize P. aibuhitensis farming conditions and promote the rational development and utilization of Nereis resources. The results showed that (1) The oxygen consumption rate and ammonia-N excretion rate were significantly affected by salinity (P<0.05); (2) oxygen consumption rate first decreased and then increased with the increase of salinity at the range of 8 to 32, which was the lowest (0.22±0.01 mg /g·h) at the salinity of 24, and reached the maximum value (0.37±0.05 mg /(g·h)) at 32; (3) ammonia-N excretion rate first decreased and then increased with the increase of salinity at the range of 8 to 40. At salinity of 24, ammonia-N excretion rate was the lowest, and reached the maximum value at the salinity of 40; (4) O︰N ratio increased at the salinity range of 8 to 40, and showed little fluctuation. At the range of 24 and 32, O︰N ratios were 130.84 and 126.47, respectively, which were pretty high, and the ratio sharply declined to 13.30 at the salinity of 40, and then it increased again. The results suggest that the optimal salinity of P. aibuhitensis would be at the range of 24 to 32. |
| Key words: Perinereis aibuhitensis salinity oxygen consumption rate ammonia-N excretion rate |
