孙慧岩, 周艳波, 马胜伟, 田骥, 徐景春, 刘智瑛, 毕洁婷, 吴洽儿. 基于北斗船位数据的南海外海灯光罩网渔船作业特征研究[J]. 南方水产科学, 2023, 19(2): 21-30. DOI: 10.12131/20220254
引用本文: 孙慧岩, 周艳波, 马胜伟, 田骥, 徐景春, 刘智瑛, 毕洁婷, 吴洽儿. 基于北斗船位数据的南海外海灯光罩网渔船作业特征研究[J]. 南方水产科学, 2023, 19(2): 21-30. DOI: 10.12131/20220254
SUN Huiyan, ZHOU Yanbo, MA Shengwei, TIAN Ji, XU Jingchun, LIU Zhiying, BI Jieting, WU Qia'er. Fishing characteristics of light fishing vessels in open South China Sea based on Beidou position data[J]. South China Fisheries Science, 2023, 19(2): 21-30. DOI: 10.12131/20220254
Citation: SUN Huiyan, ZHOU Yanbo, MA Shengwei, TIAN Ji, XU Jingchun, LIU Zhiying, BI Jieting, WU Qia'er. Fishing characteristics of light fishing vessels in open South China Sea based on Beidou position data[J]. South China Fisheries Science, 2023, 19(2): 21-30. DOI: 10.12131/20220254

基于北斗船位数据的南海外海灯光罩网渔船作业特征研究

Fishing characteristics of light fishing vessels in open South China Sea based on Beidou position data

  • 摘要: 灯光罩网是中国南海外海主要捕捞作业方式之一。为加强对南海外海灯光罩网渔船生产监测和渔船捕捞活动的有效管理,根据2017年2—5月南海外海灯光罩网渔船北斗船位数据,分析定位时间、经纬度等特征,结合作业时间、等深线等采用多层过滤法判断渔船作业状态;通过阈值筛选渔船作业的位置和时间,采用过滤窗修正法对船位点状态进行修正,计算渔船作业时长,并与渔民实际记录的纸质捕捞日志进行对比分析。结果表明:北斗船位数据提取结果和渔民实际记录的结果误差较小,航次准确率为100%,航次天数准确率为93.98%;相同作业日期准确率为92.72%;作业时长总平均绝对误差为1.12 h,平均相对误差为2.1%,具有较好的一致性。研究设计的灯光罩网渔船状态判断、作业位置确定、作业时长提取和捕捞努力量计算方法可为灯光罩网作业分析和其捕捞强度量化提供新思路。

     

    Abstract: Light falling-net is one of the main fishing operations in the open South China Sea. In order to strengthen the monitoring of the production of light falling-nets in the open South China Sea and the effective management of fishing activities of fishing vessels, we had analyzed the positioning time, longitude and latitude and other characteristics based on the Beidou position data of the open South China Sea light fishing vessels from February to May 2017. Combined with the operation time, contour line, etc., we applied the multi-layer filtration method to determine the operation state of the fishing vessels. Then we filtered the fishing vessel operating locations and time by threshold, used the filter window correction method to correct the state of vessels, calculated the operation time of fishing vessels, and compared with the fishing logbook recorded by fishermen. The results show that the error between the extracted results by Beidou position data and the actual results recorded by fishmen was small. The voyage accuracy operation was 100%, and the accuracy of voyage days was 94.30%. The accuracy rate of the same fishing date was 92.72%. The total average absolute error of the operation time was 1.12 h, and the average relative error was 2.1% with good consistency. The methods of judging the state of the light fishing-net vessels, determining the operation location, extracting the operation time and calculating the fishing effort provide new ideas for the analysis of the light fishing-net vessel and the quantification of its fishing intensity.

     

/

返回文章
返回