摘要
为探究采样站点数量对浙江南部近海渔业资源调查精度影响,基于2019年2月、5月、8月和11月在浙江南部近海的底拖网调查数据,利用计算机模拟方法比较了站点数量对各季节鱼类群落资源量、绝对优势种资源量以及物种探测率的影响,并估算浙江南部近海渔业资源调查的最优站点数。结果显示,季节差异会对相同站点数量的鱼类群落采样精度产生显著影响。鱼类群落资源量抽样调查变异系数(coefficient of variation,CV)季节变动大小为春季>秋季>冬季>夏季、相对误差(relative estimated error,REE)和相对偏差(relative bias,RB)变动范围均呈现“秋季>春季>冬季>夏季”的季节变动规律。物种探测率也具有季节性差异,不同季节相同物种探测率下所需调查站位数量不同。同时,研究对象的变化会导致最优站点数量发生变化。春季,带鱼资源量CV、REE和RB变动范围明显小于七星底灯鱼的变动范围,最优站点数量需根据实际调查需求做出相应调整。研究认为,在选用REE=10%作为确定最优抽样站点数渐进值的前提下,综合考虑各季节群落资源量、群落优势种种群资源量以及物种探测率的量化结果,浙江南部近海拖网渔业资源季节调查最优站点数量分别为:春季27个站点,夏季24个站点,秋季24个站点,冬季26个站点。
To investigate the influence of the number of sampling stations on the accuracy of the fishery resource survey along southern Zhejiang offshore,the influence of the number of stations on fish community resources,the absolute dominant species resources and the species detection rate in each season was compared based on bottom trawl survey data in southern Zhejiang offshore in February,May,August and November,2019,with computer simulation methods,and the optimal number of stations for fishery resource survey in southern Zhejiang offshore was estimated.The results showed that seasonal differences significantly affect the sampling accuracy of fish communities with the same number of sites.The seasonal coefficient of variation(CV)of fish richness sampling ranged from spring to autumn and then to winter and summer,and the relative estimation error(REE)and relative bias(RB)varied seasonally,autumn was larger than spring,then winter and finally summer.The species detection rate was also different seasonally,therefore,different numbers of stations were required for the detection rate of a species among different seasons.Changes in studying population influenced the optimal number of sites.In spring,the ranges of variation of CV,REE and RB of Trichiurus lepturus were significantly wider than those of Benthosema pterotum,and the optimal number of sites should be adjusted according to the actual survey needs.Under the premise of choosing REE=10%as the asymptotic value for determining the optimal number of sampling sites,and by considering the quantified results of community resources,community dominant species resources and species detection rate each season,the optimal number of offshore sites of trawl fishery resources in southern Zhejiang was 27 in spring,24 in summer and autumn and 26 in winter.
作者
杨涵匀
秦松
高春霞
马金
赵静
YANG Hanyun;QIN Song;GAO Chunxia;MA Jin;ZHAO Jing(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Zhejiang Mariculture Research Institute,Wenzhou 325005,China;The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China;Institute of Marine Science,Shanghai Ocean University,Shanghai 201306,China)
出处
《海洋湖沼通报(中英文)》
北大核心
2025年第4期202-210,共9页
Transactions of Oceanology and Limnology
基金
国家自然科学基金项目(31902372)
2019年温台地区海洋渔业资源调查专项(158053)。
关键词
鱼类群落
优化设计
站点数量
浙江南部近海
fish community
optimal design
number of station
offshore south of Zhejiang
