中国水产科学2017，Vol.24Issue(2)：278-283,6.DOI:10.3724/SP.J.1118.2017.16192
稳定同位素技术分析不同养殖方式下鳙饵料的贡献率
Using a stable isotope ratio to evaluate the contribution of food to bighead carp (Aristichthys nobilis) subjected to different breeding methods
摘要
Abstract
Stable carbon and nitrogen isotope ratios (δ13C andδ15N) provide a predictable method to evaluate the contribution of food sources to bighead carp (Aristichthys nobilis). We measured muscleδ13C andδ15N of bighead carp in four treatments, such as fertilization (group A), fertilization + 1/2 feeding (group B), fertilization feeding (group C), and feeding (group D) to analyze variations in the stable isotope ratios and the contribution rates of different food sources. The results showed that theδ13C andδ15N values in group A tended to be higher than those in the other groups [(?23.8±0.1)‰ and (10.8±0.4)‰, respectively,P<0.05]. Zooplankton, particulate organic mat-ter, and artificial feed were the food sources used in the different treatments, and theirδ13C andδ15N values were lower than those of bighead carp. Zooplankton was a major food source for bighead carp in group A, with a mean contribution rate of (65.6±3.2)%, whereas artificial feed was the main food source in the other three groups, of which the contribution rate in group B was relatively higher (82.1%). These results suggest that artificial feed was absorbed well by bighead carp. However, fertilizing the cultured plankton effectively improved the contribution by artificial feed, decreased the amount of feed, and reduced the pollution caused by residual feed. The present study provides a theoretical basis to invest and culture bighead carp.关键词
鳙/碳氮稳定同位素/施肥/投饲Key words
Aristichthys nobilis/stable carbon and nitrogen isotope ratio/fertilization/feedstuff feeding分类
农业科技引用本文复制引用
李学梅,朱永久,王旭歌,许德高,杨德国..稳定同位素技术分析不同养殖方式下鳙饵料的贡献率[J].中国水产科学,2017,24(2):278-283,6.基金项目
国家自然科学基金项目(31502142) （31502142）
"十二五"国家科技支撑计划项目(2012BAD25B05). （2012BAD25B05）
