中国水产科学2024，Vol.31Issue(11)：1325-1335,11.DOI:10.12264/JFSC2024-0203
浙江近海三疣梭子蟹空间分布特征及其与环境因子的关系
Spatial distribution characteristics of Portunus trituberculatus in the coastal waters of Zhejiang and their relationships with environmental factors
摘要
Abstract
Portunus trituberculatus is widely distributed in the coastal waters of China and is currently facing high fishing pressure.To protect and sustainably utilize the fishery resources of P.trituberculatus,this study was conducted based on survey data from an offshore trawl survey in Zhejiang Province in April(spring)and November(autumn)from 2020 to 2022.The spatial distribution characteristics and the relationship between Portunus trituberculatus and marine environment were analyzed using global autocorrelation analysis,hot spot analysis,and the geographical weighted regression(GWR)model.The results showed that the spatial autocorrelation in spring ranked from small to large in the order of 2020,2022,and 2021,and that in autumn ranked from small to large in the order of 2022,2021,and 2020.In 2021 and 2022,the spatial aggregation degree of P.trituberculatus in spring was higher than that in autumn,whereas that in 2020 was lower than that in autumn.The local autocorrelation showed that the distribution of hot spots in spring and autumn was regular.In spring,P.trituberculatus mainly concentrated around the waters near the northwest of the Zhoushan Sea area at coordinates 121.7°-122.5° E,30.7°-31° N,whereas in autumn,it concentrated around the northeastern part of the Zhoushan Sea area at coordinates 122.5°-123.25° E,30°-31° N.The GWR model showed that environmental factors had spatial non-stationary effects on resource distribution of P.trituberculatus during different seasons.The spatial heterogeneity degree of environmental factors on resource distribution of P.trituberculatus spring was in the order of bottom sea dissolved oxygen(SBD)>bottom sea temperature(SBT)>bottom sea salinity(SBS).The spatial heterogeneity in autumn was in the order of SBT>SBD>SBS.This study contributes to understanding the spatial distribution of P.trituberculatus in offshore waters of Zhejiang,thereby providing a scientific foundation for the management of fishery resources.关键词
三疣梭子蟹/空间自相关/地理加权回归模型/空间分布Key words
Portunus trituberculatus/spatial autocorrelation/geographically weighted regression model/spatial distribution分类
农业科技引用本文复制引用
李向乾,蒋日进,单晓鸾,李振华,赵芃,郝辉擘,李齐群,周永东..浙江近海三疣梭子蟹空间分布特征及其与环境因子的关系[J].中国水产科学,2024,31(11):1325-1335,11.基金项目
东海重要渔业资源生产过程与驱动机制项目(2023YFD2401901) （2023YFD2401901）
长江口及其邻近海域水生生物资源调查项目(HYS-CZ-202408) （HYS-CZ-202408）
浙江近海重要经济种产卵场调查与评价((HYS-CZ-202416). （(HYS-CZ-202416）
