Abstract: Under the positive development of low-carbon economy, biological carbon sink has become an important way and substance of low-carbon development, and freshwater fisheries is a vital part of aquatic biological carbon sink. This paper surveyed 30 freshwater fishing vessels of production and species in Pinghu City, Fuyang District and Wuxing District of Zhejiang Province in September 2016, and evaluated the carbon sink by trophic level method. The results showed that the total catch was 117 557 kg, the proportion of fish, shrimp and snail was 92.87%, 0.89% and 6.23%, respectively, and the production had distinct regional characteristics. The total carbon sinks were 909.82 t, and the carbon sequenstration of fish, shrimp and snail were 874.40 t (96.11%), 4.07 t (0.45%) and 31.35 t (3.45%), respectively. Compared with the carbon content evaluation method, the results of the trophic level method was increased by 893.68 t. There were remarkable differences between the results of different evaluation methods. Before ending, the paper put forward suggestions of carrying out studies on carbon sinks evaluation method, and analysis on carbon balance, so as to provide references for evaluating carbon sequenstration of freshwater fisheries.

Key words: freshwater fisheries, carbon sink fisheries, trophic level, carbon content, carbon sink function

摘要： 在积极发展低碳经济背景下，生物碳汇扩增成为低碳发展的重要途径和内容，淡水捕捞是水生生物碳汇的重要组成部分。2016年9月对浙江省平湖市、富阳区、吴兴区的30艘淡水捕捞船进行了生产统计调查，并借助营养级方法评估淡水捕捞渔业碳汇量，研究结果表明：样本船捕捞总产量为117 557 kg，其中鱼类、虾类和螺的产量占比分别为92.87%、0.89%和6.23%，生产具有明显的区域性特征；总的碳汇量评估结果为909.82 t，鱼类、虾类和螺的碳汇量分别为874.40 t（96.11%）、4.07 t（0.45%）和31.35 t（3.45%）；与碳含量评估方法相比，营养级方法的评估结果增加了893.68 t，不同方法的评估结论差异明显。最后提出了开展淡水捕捞碳汇量评估方法研究和碳平衡分析等建议，以期为科学评估淡水捕捞渔业碳汇量提供参考。

关键词: 淡水捕捞, 碳汇渔业, 营养级, 碳含量, 碳汇功能