中国海洋大学学报（自然科学版）2024，Vol.54Issue(9)：60-69,10.DOI:10.16441/j.cnki.hdxb.20230174
基于GAM模型的东海中南部大黄鱼资源密度分布及其与环境因子的关系
Relationship Between Spatial-Temporal Distribution of Larimichthys crocea with Environment Factors in South Central East China Sea Based on Generalized Additive Model
摘要
Abstract
Larimichthys crocea is an important marine economic fish species in China,and its wild resources are declining and difficult to be restored.Understanding the relationship between the spatial-temporal distribution of L.crocea and marine environment factors should aid to providing an important basis for its resource protection and scientific restoration.In this study,based on the near-bottom trawling survey and environment observation data collected in the south-central East China Sea in autumn 2018 and spring 2019,using generalized additive model(GAM),we investigated the temporal and spatial distribution of L.crocea resources and the surrounding environmental factors of the sea area.The results showed that the resource and biomass density of L.crocea were 106.2 ind/km2 and 6.57 kg/km2 in Nov.,2018 and 7.9 ind/km2 and 0.45 kg/km2 in Apr.,2019,respectively.In spring,the distribution center of L.crocea located in Yushan Fishing Ground,and in autumn,the distribution center of L.crocea moved south to Wentai Fishing Ground.GAM model fitting results showed that the optimal model in both spring and autumn consists of offshore distance,temperature,and salinity.In autumn,temperature and salinity are associated with the bottom water,while in spring,environmental factors are associated with the surface water.In both seasons,the biomass resource density of L.crocea showed a monotonic decreasing trend with the increase of temperature.The biomass resource density increased and then decreased with the increase of bottom salinity in autumn,and the optimum bottom salinity was 33.7.Biomass resource density showed a monotonic increasing trend with the increase of surface salinity in spring.The distribution of L.crocea in different seasons was influenced by the environment of different water layers,which was caused by the seasonal change of its habitat and reproduction characteristics.The results of this study clarified the current status of the East China Sea L.crocea resource and the distribution of environmental factors along its migratory rout.关键词
大黄鱼/时空分布/资源密度/环境因子/广义加性模型/东海Key words
Larimichthys crocea/temporal and spatial distribution/resource density/environmental factor/generalized additive model/East China Sea分类
农业科技引用本文复制引用
谢世君,刘世刚,宋普庆,王芮,李渊,王艺红,黄凌风,林龙山..基于GAM模型的东海中南部大黄鱼资源密度分布及其与环境因子的关系[J].中国海洋大学学报（自然科学版）,2024,54(9):60-69,10.基金项目
国家重点研究发展计划项目(2018YFC1406302) （2018YFC1406302）
福建省科技计划引导性项目(2022N0023)资助 Supported by the National Key Research and Development Program of China(2018YFC1406302) （2022N0023）
the Guiding Projects of Fujian Pro-vincial Science and Technology Program of China(2022N0023) （2022N0023）
