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基于稳定同位素技术的北太平洋柔鱼角质颚信息

金岳1,陈新军1,2,3,李云凯1,2,3**,方舟1,贡艺1   

  1. (1上海海洋大学海洋科学学院, 上海 201306; 2国家远洋渔业工程技术研究中心, 上海 201306; 3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)
  • 出版日期:2014-08-10 发布日期:2014-08-10

Information in beaks of Ommastrephes bartramii in the North Pacific Ocean using stable isotope technology.

JIN Yue1, CHEN Xin-jun1,2,3, LI Yun-kai1,2,3**, FANG Zhou1, GONG Yi1   

  1. (1College of Marine Sciences,  Shanghai Ocean University, Shanghai 201306, China; 2The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China; 3National DistantWater Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China)
  • Online:2014-08-10 Published:2014-08-10

摘要:

根据2012年7—10月中国鱿钓船在42°N—45°N、153°E—157°E海域采集的柔鱼样本,测定20对北太平洋柔鱼上、下角质颚的碳、氮稳定同位素比值,分析其碳、氮稳定同位素比值与柔鱼性别、个体大小和色素沉着等级之间的关系。结果表明:角质颚的碳、氮稳定同位素值在雌雄个体间均未发现显著差异;角质颚的碳稳定同位素值与个体大小呈显著负相关,而氮稳定同位素值与其呈显著正相关;随着柔鱼个体的生长,其角质颚的色素沉着等级逐渐增大,角质颚的氮稳定同位素比值也随之升高,而色素沉着等级与儿茶酚类物质的含量有关,儿茶酚类物质含量的增大使柔鱼角质颚强度增大,从而更有利于柔鱼摄食高营养级生物。
 

关键词: 重金属, 中国近海, 源解析, 沉积物, 定量化

Abstract: The specimens of red flying squid (Ommastrephes bartramii) were caught by Chinese squid jigging vessels in the waters of 42°N-45°N and 153°E-157°E during July to October in 2012. 20 pairs of beaks were randomly selected to measure their stable carbon and nitrogen isotope values and to investigate the relationships between stable isotope values of beaks and the corresponding biological parameters of the squids, i.e. sex, body size and pigmentation stage. The results indicated that there are no significant differences in stable carbon and nitrogen isotope values of beaks between male and female. Stable carbon isotope values of upper and lower beaks have negative relationships with the body size, while stable nitrogen isotope values of upper and lower beaks have positive relationships with the body size. Pigmentation stage and stable nitrogen isotope values of beaks increase with the growth of squid, and pigmentation stage is associated with the content of catechols in beaks, which could increase the rigidity of beaks and help squid forage high trophic level organisms. As beaks are an important information carrier in feeding ecology studies of O. bartramii, especially in diet shift and migration patterns, they can provide a new tool for estimating the trophic position and function of O. bartramii in north Pacific ecosystem.

Key words: quantification, heavy metal, coastal waters of China, sediment, source apportionment