【摘要】 船位监控系统(vessel monitoring system,VMS)数据在渔船作业特征挖掘分析方面已有较多应用。本文以粤渔10000/10011双拖渔船2017年8月16日—9月16日的VMS数据为例,详细分析了该双拖渔船的作业状态,研究了航次和网次提取方法,并对捕捞强度的空间分布进行了分析。研究结果表明,粤渔10000/10011有4个航速区间,分别为<1.0 m/s、1.0～1.8 m/s、1.8～2.9 m/s和>2.9 m/s,对应渔船的抛锚和慢速、夜间拖网航速、白天拖网航速和巡航状态; 2017年8月16日—9月16日期间,粤渔10000/10011共进行了5个航次19个网次的拖网作业,其捕捞强度空间分布呈现近岸海域高离岸海域低的特征,且夜间拖网主要在离岸海域,白天拖网会转移到水深相对浅的近岸海域。更多还原

【Abstract】 The vessel monitoring system(VMS) has been widely used in analyzing fishery boat characteristics. In this report, we used VMS data of the double trawler Yueyu 10000/10011 from August 16, 2017, to September 16,2017, to analyze the status of fishing, voyage, and net extraction and the spatial distribution of fishing effort. The results showed four categories of the velocity: <1.0 m/s, 1.0～1.8 m/s, 1.8～2.9 m/s, and >2.9 m/s, corresponding to stop/low velocity, night trawl velocity, day trawl velocity, and cruise velocity, respectively. Five voyages and nineteen nets were found between August 15, 2017, and September 17, 2017. Spatial distribution of fishing effort was found to be higher in nearshore waters and lower in offshore waters. Most fishing activities occurred at night in nearshore waters, whereas fishing activities in offshore waters occurred during the day.更多还原