| 巴家文,邓华堂,段辛斌,刘绍平,李云,陈大庆.2015.应用稳定性同位素技术（δ13C、δ15N）研究长江中游干流主要鱼类的营养级.动物学杂志,50(4):537-546. |
| 应用稳定性同位素技术（δ13C、δ15N）研究长江中游干流主要鱼类的营养级 |
| Trophic Level Analysis of Main Fish Assemblage in the Middle Reaches of Yangtze River by δ13C and δ15N Analysis |
| 投稿时间：2014-11-05 修订日期：2015-07-06 |
| DOI：DOI: 10.13859/j.cjz.201504005 |
| 中文关键词: 鱼类 营养级 食物网 稳定性同位素 河流 |
| 英文关键词:Fishes Trophic levels Food web Stable isotopes River |
| 基金项目:公益性行业（农业）科研专项经费资助（201303056-5）；农业部物种资源保护（渔业）项目；国家自然科学基金（31201997） |
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| 中文摘要: |
| 应用稳定性同位素技术（δ13C、δ15N）对2011年3月至2013年12月采自长江中游干流宜昌、荆州、石首、监利、城陵矶、鄂州、九江和湖口江段的44种鱼类及3种水生无脊椎动物进行了营养级研究。长江中游干流鱼类的δ13C值范围﹣33.83‰（鳙Aristichthys nobilis） ~ ﹣17.36‰（南方鲇Silurus meridionalis），δ15N值范围4.83‰（泥鳅Misgurnus anguillicaudatus）~ 15.13‰（翘嘴鲌Culter alburnus）。以梨形环棱螺（Bellamya purificata）的δ15N均值5.48‰作为营养级基准线（营养级 = 2），计算出该江段水生动物的营养级处于2.42 ~ 4.88，主要集中在2.83 ~ 3.61之间，鱼类平均营养级为3.28。营养级大于2.83的鱼类种类数量占了总生物种数的80.85%。大刺鳅（Mastacembelus armatus）和长春鳊（Parabramis pekinensis）营养级最低，分别为2.42 ± 0.49和2.56 ± 0.52，营养层级大于4.0的高级消费者为太湖新银鱼（Neosalanx taihuensis）、短颌鲚（Coilia brachygnathus）、鳙和长蛇鮈（Saurogobio dumerili），分别为4.88 ± 0.01、4.37 ± 0.27、4.32 ± 0.35和4.09 ± 0.78，小黄黝鱼（Micropercops swinhonis)、鱤（Elopichthys bambusa）、鱖（Siniperca chuatsi）、翘嘴鲌、青鱼（Mylopharyngodon piceus）和南方鲇的营养级分别3.99、3.92 ± 0.16、3.89 ± 0.27、3.87 ± 0.62、3.59 ± 0.69和3.59 ± 0.57。本研究旨为长江中游渔业资源评估及其合理利用提供基础科学资料，为进一步研究长江中游干流渔业资源营养结构的动态变化及受人为活动干扰影响等提供科学参考依据。 |
| 英文摘要: |
| Stable isotope analysis is commonly used to study food web structures and material ?ows in a wide range of aquatic ecosystems. The trophic level of 44 fish and three aquatic invertebrate species was analyzed by using δ13C and δ15N analysis (Table 1). Sample collection was executed from Yichuang, Jingzhou, Shishou, Jianli, Chenglingji, Ezhou, Jiujiang and Hukou sections in the middle reaches of Yangtze River from March 2011 to December 2013. In this study, there was significant difference in the δ13C and δ15N values of fishes. The δ13C values ranged from ﹣33.83‰ （Aristichthys nobilis）﹣﹣17.36‰ （Silurus meridionalis） and the δ15N values ranged from 4.83‰ （Misgurnus anguillicaudatus）﹣15.13‰ （Culter alburnus）. The δ13C average values ranged from﹣30.06‰ （Micropercops swinhonis）﹣﹣21.24‰ （Paramisgurnus dabryanus） and the δ15N average values ranged from 6.91‰ （Mastacembelus armatus）﹣14.99‰ （Neosalanx taihuensis）(Figure 1). The trophic level of aquatic organisms in the middle reaches of Yangtze River was 2.42﹣4.88 based on the δ15N values of Bellamya purificata （5.48‰） as the baseline, concentrating primarily on the range of 2.83﹣3.61, and the average trophic level of fishes were 3.28. Trophic level more than 2.83 accounted for 80.85% of the total organisms. The least trophic levels were Mastacembelus armatus （2.42 ± 0.49） and Parabramis pekinensis （2.56 ± 0.52）. The trophic levels more than 4.0 were Neosalanx taihuensis, Coilia brachygnathus, Aristichthys nobilis and Saurogobio dumerili, the values were 4.88 ± 0.01、4.37 ± 0.27、4.32 ± 0.35 and 4.09 ± 0.78, respectively. The trophic levels values of Micropercops swinhonis, Elopichthys bambusa, Siniperca chuatsi, Culter alburnus, Mylopharyngodon piceus and Silurus meridionalis were 3.99、3.92 ± 0.16、3.89 ± 0.27、3.87 ± 0.62、3.59 ± 0.69 and 3.59 ± 0.57, respectively (Figure 2). The objectives of this study were to provide basic scientific data for the assessment and utilization of fishery resources, to provide the important reference value for further researches on the dynamic change of fishery resources’ structure and effect of human activity disturbance in the middle reaches of Yangtze River. |
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