中国水产科学2023，Vol.30Issue(9)：1166-1175,10.DOI:10.12264/JFSC2023-0202
基于双重拔靴法拟合拖网网囊选择性的不确定性
Estimation uncertainties of the size selectivity of trawl codends based on the double-bootstrapping technique
摘要
Abstract
Codend size selectivity is the keystone for management of trawling fisheries and sustainable exploitation of fisheries resources.In order to assess the size selectivity of trawl codends,experimental sea trials are often conducted and fishing data is manipulated using some mathematical models to obtain selectivity parameters,such as 50％retention length(L50)and selection range(SR),and selectivity curves.Providing the values of this information,however,is highly inadequate.It needs to account for the uncertainties in size selectivity and represent them in confidence intervals.To do this,the double-bootstrapping technique is intensively applied in fishing gear selectivity studies.In this study,the basic principle of the double-bootstrapping technique was firstly introduced,then two set of fishing data involved two different fishing species were used as case studies to show and compare how this technique was used to estimate the uncertainties of codend size selectivity.Our results demonstrated that the uncertainties of codend size selectivity could be easily estimated applying the double-bootstrapping technique.Additionally,the most commonly wrong practice of using the double-bootstrapping technique was discussed.Our study will provide a guideline for conducting trawl codend selectivity studies,improve the level of selectivity researches,and contribute to the sustainable development of marine fisheries in China.关键词
拖网/网囊选择性/双重拔靴法/不确定性Key words
trawl/codend selectivity/double-bootstrapping technique/uncertainties分类
农业科技引用本文复制引用
杨炳忠,万荣..基于双重拔靴法拟合拖网网囊选择性的不确定性[J].中国水产科学,2023,30(9):1166-1175,10.基金项目
国家重点研发计划专项(2020YFD0901205) （2020YFD0901205）
农业农村部财政项目 （）
中国水产科学研究院基本科研业务费项目(2019CY0303). （2019CY0303）
