拖网渔船电子捕捞日志的作业信息与北斗船位数据获取的作业信息的可信度比较研究

Comparative study on credibility of fishing information of electronic fishing logs of trawlers and fishing information acquired by Beidou position data

    摘要
  • 摘要: 为分析电子捕捞日志数据的准确性和可信度，以“粤新会渔01282” “粤新会渔01240” “粤新会渔01286” “粤新会渔01239” “粤茂滨渔47239” “粤新会渔02163” “粤茂滨渔42278” “粤新会渔00070”和“粤新会渔01268”9艘拖网渔船2018年8月17日—2019年4月30日的作业状态为研究对象，利用北斗船位数据提取拖网作业时间、作业网次和作业渔区，与电子捕捞日志数据的相关信息进行比较验证。结果表明，9艘拖网渔船的电子捕捞日志数据与北斗数据提取的作业时间的重复率分别为36.7%、64.8%、71.4%、81.5%、24.7%、46.7%、66.7%、79.6%和68.9%。作业渔区的重复率分别为80%、86.9%、65.7%、74.7%、75.3%、85.6%、71.6%、56.9%和65.2%，作业网次的重复率分别为65%、86.4%、60%、70%、75.3%、67.1%、54.4%、62.1%和35.4%。作业时间与渔获量的相关性分析结果表明，“粤新会渔01286” “粤新会渔01239” “粤新会渔01240”和“粤茂滨渔47239”的作业时间与渔获量呈极显著相关(P<0.01)，“粤茂滨渔42278”的作业时间与渔获量呈显著相关(P<0.05)，“粤新会渔01282” “粤新会渔02163” “粤新会渔00070”和“粤新会渔01268”的作业时间与渔获量无显著相关性(P<0.05)，反映出电子捕捞日志数据的准确性和可信性尚有空间可待提高。

     

    Abstract: To analyze the accuracy and credibility of electronic fishing log data, we extracted and analyzed the fishing time, fishing hauls and fishing area of five trawlers ('Yuexinhui fishing 01282', 'Yuexinhui fishing 01240', 'Yuexinhui fishing 01286', 'Yuexinhui fishing 01239', 'Yuemaobin fishing 47239', 'Yuexinhui fishing 02163', 'Yuemaobin fishing 42278', 'Yuexinhui fishing 00070' and 'Yuexinhui fishing 01268') from August 17, 2018 to April 30, 2019 by Beidou position data, and then compared them with relevant information of electronic fishing logs data. The repetition rates of five trawlers extracted from the electronic fishing logs data and Beidou position data were 36.7%, 64.8%, 71.4%, 81.5%, 24.7%, 46.7%, 66.7%, 79.6% and 68.9%, respectively. The repetition rates of fishing areas were 80%, 86.9%, 65.7%, 74.7%, 75.3%, 85.6%, 71.6%, 56.9% and 65.2%, respectively. The repetition rate of fishing hauls were 65%, 86.4%, 60%, 70%, 75.3%, 67.1%, 54.4%, 62.1% and 35.4%, respectively. The correlation analysis between fishing time and catches shows that the fishing time of 'Yuexinhui fishing 01282', 'Yuexinhui fishing 01240', 'Yuexinhui fishing 01239' and 'Yuemaobin fishing 47239' correlated with catches very significantly (P<0.01); the fishing time of 'Yuemaobin fishing 42278' correlated with catches significantly (P<0.05); the fishing time of 'Yuexinhui fishing 01282', 'Yuexinhui fishing 01286', 'Yuexinhui fishing 00070' and 'Yuexinhui fishing 01268' had no significant correlation with catches (P>0.05), which reflects that the accuracy and feasibility of electronic fishing logs data still need to be improved.

     

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