文章摘要
赤道海域茎柔鱼栖息地月间分布及与环境因子的关联
Monthly spatial and temporal distribution of potential habitat of jumbo flying squid Dosidicus gigas in the Equator and its relationship with environmental conditions
投稿时间:2020-10-28  修订日期:2021-03-02
DOI:
中文关键词: 茎柔鱼  时空分布  多元环境因子  最大熵模型  赤道
英文关键词: Dosidicus gigas  spatio-temproal distribution  multiple environmental factors  maximum entropy model  Equator
基金项目:国家重点研发计划(2019YFD0901405);国家自然科学基金青年科学基金(41906073);上海市自然科学基金(19ZR1423000);
作者单位邮编
余为 上海海洋大学海洋科学学院 201306
方星楠 上海海洋大学海洋科学学院 
陈新军 上海海洋大学海洋科学学院 
张忠 上海海洋大学海洋科学学院 201306
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中文摘要:
      茎柔鱼是我国主要捕捞的经济头足类之一,探究其栖息地的空间分布与环境的关系可以帮助企业有效利用和开发渔场。本研究利用2012~2018年我国鱿钓渔船在赤道海域的捕捞数据,选取海表面温度(Sea Surface Temperature,SST)、海表面盐度(Sea Surface Salinity,SSS)、叶绿素浓度(Chlorophyll-a, Chl-a)、净初级生产力(Net Primary Production,NPP)、光合有效辐射(Photosynthetically Active Radiation,PAR)、涡旋动能(Eddy Kinetic Energy,EKE)和海平面异常(Sea Level Anomaly,SLA)7个环境因子以月为单位建立最大熵模型,分析赤道海域茎柔鱼栖息地的月间时空变化及环境因子的影响差异。结果表明:各月模型模拟的适宜栖息地空间分布与实际作业位置较好吻合,1~8月份适宜栖息地向东南海域移动,随后月份逐渐转向西北海域。环境因子贡献率表明各月间环境因子对茎柔鱼栖息地分布影响具有明显差异,关键环境因子的适宜范围呈现出明显的季节变化,但各月对SST的空间分布表现出较高的敏感性。研究表明,最大熵模型能较好模拟茎柔鱼栖息地的分布情况,月间时空分布特征显著,海流和涡旋可能会对茎柔鱼的渔场形成和分布具有较大影响。
英文摘要:
      The jumbo flying squid Dosidicus gigas is one of the economically important cephalopods targeted by China. Exploring the relationship between spatial and temporal distribution of potential habitats of D. gigas and environmental conditions can effectively help enterprises to utilize and develop fishing grounds. Based on the fisheries data of Chinese squid-jigging fishing vessels in equatorial waters from 2012 to 2018, and environmental data including sea surface temperature (SST), sea surface salinity (SSS), chlorophyll-a (Chl-a), net primary production (NPP), photosynthetically active radiation (PAR), eddy kinetic energy (EKE) and sea level anomaly (SLA), we established the maximum entropy model (MaxEnt) to analyze the spatial and temporal variations of habitat and the influence of environmental factors from month to month. The results showed that the suitable habitat simulated by the model was in good agreement with the actual operation locations. The suitable habitat gradually moved southeastward from January to August, and then shifted northwestward in the following months. The results of contribution rate for environmental factors showed that impacts of environmental variables on habitat distribution of the D. gigas in different months showed significant differences. The suitable range of key environmental factors exhibited significant seasonal changes. However, spatio-temporal distribution of potential habitat of D. gigas was extremely sensitive to SST patterns. Our findings indicated that the maximum entropy model canSpreferably simulate the habitat distribution of D. gigas in the equator. The spatial and temporal distribution characteristics are significant in different months, and the current and eddy may have a greater impact on the formation and spatial distribution of fishing ground of D. gigas.
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