中国南极磷虾渔业行为研究——基于随机游走模型
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- 英文论文题名：Fishing behavior of Chinese krill fishing vessel: Lévy or not?
- 论文作者：王芮 ; 朱国平
- 英文论文作者：WANG Rui ; ZHU Guoping ; Shanghai Ocean University ; College of Marine Sciences ; National Distant-water Fisheries Engineering Research Center ; The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources ; Shanghai Ocean University ; Ministry of Education
- 年：2016
- 作者机构：上海海洋大学海洋科学学院;国家远洋渔业工程技术研究中心;上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室极地海洋生态系统研究室;
- 论文关键词：列维随机游走 ; 南极磷虾 ; 渔业行为
- 英文论文关键词：Lévy random walk ; Antarctic krill ; fishing behavior
- 会议召开时间：2016-11-02
- 会议录名称：2016年中国水产学会学术年会论文摘要集
- 语种：中文
- 分类号：S97;S917.4
- 学会代码：OGSB
- 会议名称：2016年中国水产学会学术年会
- 会议地点：中国四川成都
- 主办单位：中国水产学会、四川省水产学会
- 学会名称：中国水产学会
- 页数：1
- 文件大小：519k
- 原文格式：D
- 会议级别：全国
摘要
任何一种渔业均具有各自的捕捞作业行为特征,若要全面的了解一种渔业,了解其渔业行为特征是极为关键的部分。本文基于随机游走模型(random walk model),在三种统计单位下,分析中国南极磷虾渔业在进行捕捞作业时相邻网次间的距离与距离频次分布的关系,其结果显示相隔距离-距离频次的分布呈现一个重尾分布的形式,进而根据符合随机游走的幂指数函数f(l)~l-μ计算参数μ值来确定中国南极磷虾渔业隶属于哪一种随机游走模式。结果发现,在三种不同统计单位下,参数μ值的估算结果存在一定差异,但从总体上分析,μ值的平均值为1.1458,且μ值多集中在1~1.5之间,证明了我国南极磷虾渔业的作业模式符合随机游走模型中的列维随机游走(Levy random walks)。此外,本文还分析了影响中国南极磷虾渔业行为的相关因素,为今后磷虾捕捞作业以及磷虾资源管理与保护的研究工作提供新角度的思路。
Every kind of fisheries has its own fishing behavior characteristics, understanding the fishing behavior of a kind of fishery is a very important part of grasping this fishery comprehensively. In this paper, based on the random walk model, analyzed the relationship between distance and frequency distribution of the adjacent netted krill fishery during fishing operations in three statistical units. The distribution of distance frequency shows a heavy-tailed distribution, which can be used to calculate the value of the parameter μ according to the power function f(l) ~ l-μ of random walk to determine which random walk pattern the Chinese Antarctic krill fishery belongs to. The results show that there are some differences in the estimation results of parameter μ in three different statistical units, but on the whole, the mean value of μ is 1.1458 and the value of μ more focused on 1~1.5, the operating pattern of the Antarctic krill fisher is consistent with the Lévy random walks in the random walk model.
Every kind of fisheries has its own fishing behavior characteristics, understanding the fishing behavior of a kind of fishery is a very important part of grasping this fishery comprehensively. In this paper, based on the random walk model, analyzed the relationship between distance and frequency distribution of the adjacent netted krill fishery during fishing operations in three statistical units. The distribution of distance frequency shows a heavy-tailed distribution, which can be used to calculate the value of the parameter μ according to the power function f(l) ~ l-μ of random walk to determine which random walk pattern the Chinese Antarctic krill fishery belongs to. The results show that there are some differences in the estimation results of parameter μ in three different statistical units, but on the whole, the mean value of μ is 1.1458 and the value of μ more focused on 1~1.5, the operating pattern of the Antarctic krill fisher is consistent with the Lévy random walks in the random walk model.
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