中国水产科学2025，Vol.32Issue(7)：981-995,15.DOI:10.12264/JFSC2025-0109
采样设计对广东近海鱼类物种丰富度估计的影响
Effects of sampling design on fish species richness estimation in Guangdong coastal waters
摘要
Abstract
Accurate assessment of marine biodiversity is fundamental to fisheries management and ecological conservation.Optimizing sampling design is crucial for improving the estimation precision of species richness as an essential biodiversity indicator.Based on seasonal bottom trawl survey data collected from August 2014 to May 2015 in the coastal waters of Guangdong,this study employed computer-simulated resampling techniques to compare the effects of simple random sampling(SRS)and stratified random sampling(StRS)on the estimation of fishery species richness under varying numbers of sampling sites and frequencies.The results showed that the species detection rate increased rapidly with the addition of sampling sites when their number was low,and the increasing rate gradually slowed as the number of sites increased.To achieve a 90％species detection rate,44 sampling sites were required for year-round seasonal sampling;for an 80％detection rate,the minimum number of sites needed was 36,with the summer-autumn-winter or summer-autumn-spring seasonal combinations being the most efficient.Both the absolute values of relative estimation error(REE)and relative bias(RB)decreased as the number of sampling sites increased.StRS exhibited significantly lower absolute REE and RB values than SRS(P＜0.05).After excluding rare species,the number of sites required to achieve a 90％detection rate decreased to 20,and the absolute REE and RB values also declined,indicating that rare species increased sampling variability.The design effects(De)of 15 stratified sampling combinations were all below 1,demonstrating that StRS had higher sampling efficiency in Guangdong coastal fisheries surveys,particularly when the number of sampling sites was limited.This study provides a scientific basis for optimizing sampling designs in Guangdong coastal fisheries surveys,and suggests selecting site numbers and seasonal combinations based on monitoring precision requirements and cost constraints.关键词
渔业调查/简单随机采样/分层随机采样/物种丰富度/广东近海Key words
fisheries survey/simple random sampling/stratified random sampling/species richness/Guangdong coastal waters分类
农业科技引用本文复制引用
粟丽,许友伟,孙铭帅,张魁,陈作志..采样设计对广东近海鱼类物种丰富度估计的影响[J].中国水产科学,2025,32(7):981-995,15.基金项目
国家重点研发计划项目(2024YFD2400402) （2024YFD2400402）
广东省基础与应用基础研究基金项目(2025A1515011979) （2025A1515011979）
中国水产科学研究院南海水产研究所基本科研业务费专项资金项目(2025RC01) （2025RC01）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金项目(2023TD05). （2023TD05）
