2009/2010-2011/2012渔季中国南极磷虾渔业渔场时空变动

掌握南极磷虾渔业行为及渔场变动信息可为模拟渔业与生态系统相互作用提供非常重要的支撑。基于渔业科学观察员收集的2009/2010-2011/2012渔季中国南极磷虾渔业数据，利用渔场重心指标，分析了中国南极磷虾渔业渔场变动及渔船的行为模式。结果表明，从作业网次上来讲，2009/2010-2011/2012渔季期间，中国南极磷虾渔业主要渔场由48.1小区转向48.2小区，但产量变化却呈相反的趋势。尽管作业位置分布于6个精细管理单元中，但旬别渔场重心集中在4个精细管理单元中（APDPW，APDPE，APBSE和SOW）。中国南极磷虾渔业渔场选择不仅受到本地磷虾丰度的影响，同时还受到预定的决策，渔船条件及市场因素等的影响。

Spatial temporal variation on fishing ground of Chinese Antarctic krill fishery in 2009/2010 to 2011/2012 fishing season

Understanding of the fishing behaviour and the dynamic information on fishing ground of Antarctic krill fishery can provide an important support to modeling the interaction between fishery and ecosystem. Based on the data of Antarctic krill fishery in 2009/2010 to 2011/2012 fishing season collected by the fishery observers, the present study analyzes the fishing ground dynamics of Chinese Antarctic krill fishery and the behaviour pattern of fishing vessels using the barycenter of fishing ground. The results show that the main fishing ground is shifted from subarea 48.1 to subarea 48.2 during 2009/2010 to 2011/2012 fishing season in view of fishing net, but the reverse trend can be found for the catch. The barycenter of fishing ground in the 10 day period has only occurred in 4 SSMUs (APDPW, APDPE, APBSE and SOW), although the fishing sites are located in 6 SSMUs. The selection of fishing ground of Chinese Antarctic krill fishery is affected by local abundance of Antarctic krill and predetermined decision making, the condition of fishing vessel and marketing factors.