文章摘要
张妙,陈新军,陈亚,贡艺,李云凯,贺鑫,赵津.黄颡鱼不同组织碳氮稳定同位素的周转与分馏研究[J].上海海洋大学学报,2016,25(6):822-830.
ZHANG Miao,CHEN Xinjun,CHEN Ya,GONG Yi,LI Yunkai,HE Xin,ZHAO Jin.Turnover and fractionation of carbon and nitrogen stable isotopes in tissues of Pelteobagrus fulvidraco[J].Journal of Shanghai Ocean University,2016,25(6):822-830.
黄颡鱼不同组织碳氮稳定同位素的周转与分馏研究
Turnover and fractionation of carbon and nitrogen stable isotopes in tissues of Pelteobagrus fulvidraco
投稿时间:2015-12-14  修订日期:2016-03-09
DOI:10.12024/jsou.20151201616
中文关键词: 稳定同位素  黄颡鱼  周转速率  同位素分馏  摄食
英文关键词: stable isotope  Pelteobagrus fulvidraco  turnover rate  discrimination factor  diet
基金项目:国家自然科学基金(41206124,41541042);教育部博士点基金资助项目(20123104120001);上海大学生创新活动计划项目(201410264026)
作者单位E-mail
张妙 上海海洋大学 海洋科学学院, 上海 201306  
陈新军 上海海洋大学 海洋科学学院, 上海 201306
国家远洋渔业工程技术研究中心, 上海 201306
大洋渔业资源可持续开发省部共建教育部重点实验室, 上海 201306
远洋渔业协同创新中心, 上海 201306 
 
陈亚 上海海洋大学 海洋科学学院, 上海 201306  
贡艺 上海海洋大学 海洋科学学院, 上海 201306  
李云凯 上海海洋大学 海洋科学学院, 上海 201306
国家远洋渔业工程技术研究中心, 上海 201306
大洋渔业资源可持续开发省部共建教育部重点实验室, 上海 201306
远洋渔业协同创新中心, 上海 201306 
ykli@shou.edu.cn 
贺鑫 上海海洋大学 海洋科学学院, 上海 201306  
赵津 上海海洋大学 海洋科学学院, 上海 201306  
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中文摘要:
      稳定同位素技术已成为摄食生态学研究的有力手段之一,动物不同组织的稳定同位素周转速率和分馏系数可用于分析其不同生活史时期的摄食状况,进而解释其洄游行为。以黄颡鱼(Pelteobagrus fulvidraco)为研究对象,通过改变黄颡鱼饵料模拟食性转换过程,研究黄颡鱼不同组织碳、氮稳定同位素周转速率和分馏系数,探讨组织生长及新陈代谢作用对各组织稳定同位素周转的相对贡献比例。结果表明,黄颡鱼各组织碳、氮稳定同位素半衰期分别为28.0 d和35.7 d(粘液),25.8 d和63.6 d(肝脏),106.5 d和64.2 d(鱼鳍),196.9 d和196.8 d(鳃),肌肉的碳稳定同位素半衰期为92.6 d,其粘液、肝脏周转速率较快,鱼鳍、肌肉和鳃较慢。黄颡鱼不同组织碳、氮稳定同位素分馏系数(Δδ13C和Δδ15N)范围分别为-2.1‰~2.0‰和-1.4‰~2.4‰。研究认为,除鳃以外,黄颡鱼其他组织的稳定同位素周转均以代谢作用占主导(>60%),生长作用贡献比例较小。黄颡鱼的粘液和肝脏可反映短期内的摄食转换,而鱼鳍、肌肉和鳃则反映较长时间尺度的摄食特征。
英文摘要:
      Stable isotope analysis is widely used in trophic ecology study and has been a powerful tool to examine structure and trophic interactions of aquatic food webs. Multiple tissues of organism may provide diet information of their life history. Applications to reconstruction of diet and migration patterns require precise estimates of turnover rate and discrimination factor of each isotope in the studied tissues. The study derived turnover rates and discrimination of yellow catfish Pelteobagrus fulvidraco from the tissues of different organs and estimated the contributions of growth and metabolism through laboratory diet-shift experiment. Results showed that mucus (δ13C:28.0d, δ15N:35.7d) and liver (δ13C:25.8 d, δ15N:63.6d) are the tissues with the highest turnover rates, while the turnover rate of fin (δ13C:106.5 d, δ15N:64.2d) and muscle (δ13C:92.6d) are smaller and gill having the lowest turnover rate and the longest half-life. The carbon and nitrogen stable isotope discrimination factors of tissues are different. Discrimination factors of different tissues are-1.4‰-2.4‰ for nitrogen and -2.1‰-2.0‰ for carbon. The growth rate of Pelteobagrus fulvidracois relatively slow, and the contribution of growth to tissue stable isotope turnover rate is low, however, the metabolic contributions to both carbon and nitrogen turnover rate are higher (>60%) in all tissues except for gill. The variation in turnover rates of multiple tissues may provide complementary information for diet reconstruction at different time scales, and the mucus and liver reflect short-time diet shift, while fin, liver and muscle reflect a rather long-time of dietary information.
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