中国海洋大学学报（自然科学版）2024，Vol.54Issue(2)：73-83,11.DOI:10.16441/j.cnki.hdxb.20220266
渤海口虾蛄时空分布及其主要影响因子的空间异质效应
Spatio-Temporal Distribution of Oratosquilla oratoria in Bohai Sea and Spatial Heterogenity Effects of Its Major Controlling Factors
摘要
Abstract
For accurate prediction of the spatiotemporal distribution of Oratosquilla oratoria,we analyzed the influencing factors of the density distribution of O.oratoria and their spatially heterogeneous effects in Bohai Sea based on monthly bottom trawl survey data of fishery resources conducted in Bohai Sea in spring(April—June)and Autumn(September—November)of 2017 using geographically weighted regression(GWR)models.The results suggested that there are some seasonal differences in the main controlling environmental factors affecting the density distribution of O.oratoria in Bohai Sea.In spring,the main control environmental factors in order of contribution were bottom temperature(BT),the kurtosis grade of the sediment particle size distribution(Ord_Kt),the sea water depth(Depth)and the average particle size grade(Ord_Mz).In autumn,the main control environmental factors were Ord_Mz,Depth and Ord_Kt in order of contribution.In spring,the local effect coefficients of BT on the density distribution of O.oratoria were all positive,and the positive effect was stronger in Laizhou Bay and Liaodong Bay where the BT gradient was larger.In Liaodong Bay and the mouth of Laizhou Bay where Ord_Mz was 2～4,the average particle size was about 3～6 Φ,and the substrate type was mainly very fine sand,coarse silt and medium silt,the density of the O.oratoria increased with increasing Ord_Mz.On the contrary,in Laizhou Bay and central Bohai Sea where Ord_Mz was 4～5,the average particle size was about 5～7 Φ,and the substrate type was mainly medium silt and fine silt,Ord_Mz had a negative effect.In autumn,the effects of Ord_Mz on the density distribution of O.oratoria were all positive,and the effect coefficients were relatively larger in Bohai Bay.In both spring and autumn,the effect of BT was mainly positive,and the negative effect appeared in deeper water areas(mostly at depths greater than 25 m)such as Liaodong Bay.Considering the influence of the main controlling environmental factors,the predicted density of O.oratoria in spring was the highest in Laizhou Bay and the nearshore waters of central Bohai Sea.In autumn,their high-density areas were widely distributed in Bohai Bay and the nearshore waters of central Bohai Sea.In the present study,our findings contributed to the accurate prediction of the distribution of O.oratoria in Bohai Sea and provided a scientific basis for the refined management of this fishery resource.关键词
口虾蛄/密度分布/环境因子/空间异质效应Key words
Oratosquilla oratoria/density distribution/environmental factor/spatial heterogeneity effect分类
农业科技引用本文复制引用
胡贝尔,韩青鹏,关丽莎,徐开达..渤海口虾蛄时空分布及其主要影响因子的空间异质效应[J].中国海洋大学学报（自然科学版）,2024,54(2):73-83,11.基金项目
国家重点研究发展计划项目(2019YFD0901204) （2019YFD0901204）
浙江省海洋渔业资源可持续利用技术研究重点实验室开放课题项目(2020KF006)资助Supported by the National Key Research and Development Program of China(2019YFD0901204) （2020KF006）
the Open Project of Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province(2020KF006) （2020KF006）
