中国水产科学2012，Vol.19Issue(2)：217-222,6.DOI:10.3724/SP.J.1118.2012.00217
盐度对中华绒螯蟹雌性亲蟹代谢的影响
Effect of salinity on the metabolism of female Chinese crabs,Eriocheir sinensis
摘要
Abstract
We evaluated the effect of salinity on the metabolism of female Chinese crabs (Eriocheir sinensis). The crabs, body weight (55.59 ± 6.24) g, were held at salinities of 0, 6, 12, 18 and 24, (16 ± l)tl, and we measured oxygen consumption, CO2 production, and ammonia-N excretion. Using this data, we calculated the respiratory quotient, oxygen-nitrogen ratio, energy consumption rate, and metabolic substrate ratio. Salinity had a significant effect on the oxygen consumption rate and ammonia-N excretion rate (P<0.05). Between salinity 0-24, the rates of oxygen consumption and ammonia-N excretion both decreased as salinity increased. We observed a similar pattern for CO2 production and energy consumption, but the differences were not significant relative to the control group at salinity 6 (P>0.05). Between salinity 12-24, CO2 production and energy consumption were significantly lower than in the control group. Salinity had no effect on the respiratory quotient and oxygen-nitrogen ratio (P>0.05). Our results suggest that lipids are used preferentially as an energy source. Furthermore, proteins were utilized to a much greater extent than carbohydrates. The proportion of lipids in the metabolic substrate increased as salinity increased. Conversely, the carbohydrate metabolic substrate ratio decreased as salinity increased, whereas the protein metabolic substrate ratio remained constant. At salinity 24, the ratio of protein, carbohydrate, and lipid used as metabolic substrate was 6.4:14.6:79.0. During the reproductive migration, the female Chinese crab migrates from fresh water into the Yangtze River estuary. Thus, individuals must adjust to the higher salinity and modify their energy metabolism. Our results suggest that energy consumption decreases after entering salt water, allowing female crabs to divert energy into reproduction.关键词
中华绒螯蟹/盐度/代谢/耗氧率/排氨率Key words
Eriocheir sinensis/ salinity/ metabolism/ oxygen consumption rate/ ammonia-N excretion rate分类
农业科技引用本文复制引用
庄平,贾小燕,冯广朋,章龙珍,王瑞芳..盐度对中华绒螯蟹雌性亲蟹代谢的影响[J].中国水产科学,2012,19(2):217-222,6.基金项目
国家973计划项目(2010CB429005) （2010CB429005）
国家公益性行业(农业)科研专项(200903048-07,201203065) （农业）
中央级公益性科研院所基本科研业务费专项(东海水产研究所2011M08). （东海水产研究所2011M08）
