Metabolism of polychaete Neanthes japonica Izuka: relations to temperature,salinity and body weight

作     者：刘勇 线薇薇 孙世春 

作者机构：Fishery CollegeOcean University of China Institute of OceanologyChinese Academy of Sciences 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2009年第27卷第2期

页      面：356-364页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Supported by the National Natural Science Foundation of China (No. 30490233) the Three-Gorge Project and the Estuarine Environment (No. SX2004-018) from the Three Gorges Project Construction Committee 

主　　题：Neanthes japonica salinity temperature body weight ammonia excretion Oxygen consumption 

摘      要：Polychaete Neanthes japonica is a species geographically specific in China and Japan with important scientific implication and commercial value. In this study, the relations of body weight, salinity and temperature to oxygen consumption and ammonia excretion of N. japonica were determined. Three different groups in body weight （large： 2.34±0.36 g, middle： 1.50±0.21 g and small： 0.62±0.12 g） were set for all experiments. Results show that the body weight is negatively related to the rates of oxygen consumption and ammonia excretion; and the relationship is significant. The oxygen consumption and ammonia excretion at 24℃ decreased at salinity from 5 to 30 and increased above 30, indicating that both lower and higher salinity are adverse and certain degree of salinity stress is necessary for enhancing the energy demand. At salinity 30, rising temperature from 18℃ to 30℃, the oxygen consumption increased before 27℃ and then decreased. However, the relation of ammonia excretion and temperature seems more complex. Two-way ANOVA shows that salinity, temperature and body weight all have a significant effect on the oxygen consumption and ammonia excretion of the worm. Moreover, interaction between salinity/temperature and body weight is also significant. O：N （oxygen/nitrogen） ratio varies greatly in this case from 5.97 to 463.22, indicating that N. japonica can regulate the type of metabolic substrate against environment changes.