温度对日本刺沙蚕氮生长和氮收支的影响  

The Effects of Temperature on Nitrogen Retention and Nitrogen Budget in Neanthes japonica

作　　者：刘勇[1,2] 线薇薇[2] 

机构地区：[1]中国海洋大学水产学院,山东青岛266003 [2]中国科学院海洋研究所,山东青岛266071

出　　处：《水产科学》2010年第6期311-316,共6页Fisheries Science

基　　金：国家自然科学基金资助项目(30490233)

摘　　要：探讨了不同温度下（17、20、23、26、29℃）日本刺沙蚕的氮生长和氮收支情况。结果表明,温度对日本刺沙蚕的摄食氮、生长氮、氮的饵料转化率、特定生长率均有显著性的影响,且均有随温度升高而增加的趋势,到达最大值后（26℃）,随温度的升高而下降。温度对氮的吸收效率无显著影响。根据回归方程计算得到日本刺沙蚕的最佳氮生长温度为23~26℃。试验结果显示,日本刺沙蚕在适宜温度下获得较高的氮生长主要归因于较高的摄食氮和氮的饵料转化率。温度对日本刺沙蚕氮收支各组分均存在显著性影响,其中排泄氮的比例26℃最小,而后随温度的升高或降低均增大,这与生长氮和粪便氮比例的变化趋势相反。粪便氮的比例较小且变化不剧烈,为6.43%~9.40%。因此,排泄氮的比例和生长氮的比例主导着日本刺沙蚕的氮收支模式。日本刺沙蚕在5个温度下的平均氮收支方程为100CN=49.2GN＋43.3UN＋7.5FN。The effect of temperature on nitrogen retention and nitrogen budget in Neanthes japonica was investigated at 17,20,23,26 and 29 ℃ by a biological method.The results showed that nitrogen consumption,nitrogen retention,nitrogen food conversion efficiency and specific growth rate were significantly affected by temperature.They all increased with increasing temperature,peaked at about 26 ℃,and then decreased with increasing temperature.There was no significant differences in nitrogen Absorption efficiency among all temperature treatments.As calculated from regression equations,the optimal temperature range for nitrogen retention in N.japonica was found at 23~26 ℃.The results indicated that the high nitrogen growth of the polychaete at suitable temperature mainly resulted from the significant increase in nitrogen consumption and nitrogen food conversion efficiency at corresponding temperature.All parts of nitrogen budget were significantly affected by temperature.The minimum proportion of nitrogen excretion was at 26 ℃,above or below the temperature,the value decreased,which was reversed with the proportion of nitrogen retention and faeces.The proportion of nitrogen excretion and nitrogen retention were the major factors influencing the nitrogen budget model.The average nitrogen budget of N.japonica under five temperature treatments was：100CN=49.2GN＋42.3UN＋7.5FN.

关 键 词：日本刺沙蚕 温度 氮生长 氮收支 

分 类 号：S968.9[农业科学—水产养殖]