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远洋渔业是碳汇渔业的组成部分之一,不仅为消费者提供高品质水产品,同时还具有碳汇功能。在初步构建金枪鱼渔业碳汇评估模型的基础上,借助印度洋金枪鱼委员会(IOTC)提供的中国产量数据,结合捕捞种类的营养级,分析了1995-2012年中国的印度洋金枪鱼渔业碳汇量变化情况。结果表明:在1995-2012年间,金枪鱼渔业平均营养级处于4.34~4.45之间,其中4.41~4.45出现的频率为66.66%;整体评估模型的碳汇量测算平均值为54.13万t,在2006年达到峰值,约124.51万t;分种类评估模型碳汇量的主要贡献种类为BET、YFT和ALB,碳汇量平均值为55.05万t,2006年峰值为125.83万t;两种评估模型测算结果的变化趋势一致,但整体评估模型的测算值偏低,相对差额平均值为2.35%;为了准确评估金枪鱼渔业碳汇量,需要加强对分海域、分种类及分生命周期的金枪鱼食物网能量传递效率进行系统研究。
Onshore fisheries are part of the carbon sequestration fisheries, providing consumers with not only high quality aquatic products but also carbon sinks. Based on the preliminary assessment model of tuna carbon sequestration in China, the change of carbon sequestration in China’s tuna fishery from 1995 to 2012 was analyzed based on the Chinese production data provided by the IOTC and the trophic level of the catch species. The results showed that the average trophic level of tuna fishery ranged from 4.34 to 4.45 between 1995 and 2012, of which 4.41 to 4.45 occurred at a frequency of 66.66%. The overall assessment model of carbon sinks averaged 541.3 thousand tons in 2006 Reaching the peak value of about 1,245,100 t. The main contribution types of the carbon sequestration for the sub-species assessment model are BET, YFT and ALB, the average amount of carbon sinks was 550,500 t, and the peak value in 2006 was 1,258,300 t. The estimation results of the two assessment models But the estimated value of the overall assessment model is low, with an average relative difference of 2.35%; in order to accurately assess the carbon sequestration of tuna fisheries, it is necessary to strengthen the energy transfer of tuna food webs for sub-regions, sub-species and life-cycle Efficiency of systematic research.