中西太平洋围网黄鳍金枪鱼渔场分布与溶解氧垂直结构的关系  

Relationship Between Fishing Grounds of Yellowfin Tuna(Thunnus albacares)and Dissolved Oxygen in the Western and Central Pacific

作　　者：赵蓁 孙奥燃 张春玲 朱国平[1,2,3] 胡松[1,2] ZHAO Zhen;SUN Aoran;ZHANG Chunling;ZHU Guoping;HU Song(College of Marine Science,Shanghai Ocean University,Shanghai 201306,China;Polar Research Center,Shanghai Ocean University,Shanghai 201306,China;Collaborative Innovation Center of Ocean Fishery,Key Laboratory of Sustainable Development of Ocean Fishery Resources,Ministry of Education,National Engineering Research Center of Ocean Fishery,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]上海海洋大学极地研究中心,上海201306 [3]上海海洋大学国家远洋渔业工程技术研究中心,大洋渔业资源可持续开发省部共建教育部重点实验室,远洋渔业协同创新中心,上海201306

出　　处：《中国农业科技导报》2022年第4期193-202,共10页Journal of Agricultural Science and Technology

基　　金：大洋渔业资源可持续开发教育部重点实验室开放基金项目(A1-2006-21-200201)。

摘　　要：溶解氧垂直结构是影响黄鳍金枪鱼(Thunnus albacares)垂直活动的重要因素,为了解中西太平洋围网黄鳍金枪鱼渔场溶解氧的分布特征及其对围网渔业生产的影响,基于WOA18溶解氧三维数据集和中西太平洋2008-2017年间围网黄鳍金枪鱼渔业的生产数据,分析渔场区溶解氧浓度的垂直结构特征及其与渔获量(catch per unit effort,CPUE)的时空对应关系,并构建渔场分布与溶解氧垂直结构的统计关系模型。结果表明,黄鳍金枪鱼围网捕捞的高渔获量多集中在5°S-5°N之间的西太平洋热带海域,渔场区的溶解氧浓度随着深度的增加逐渐降低。渔场区表层的溶解氧浓度约为195~210μmol∙kg^(-1),50 m水层的溶解氧浓度为192~199μmol∙kg^(-1);CPUE集中分布在150和300 m水层区域,其溶解氧浓度分别为147和120μmol∙kg^(-1)。渔获量与溶解氧垂向梯度呈负相关关系,跃层以上尤为明显。模型分析表明,渔场分布与不同深度的溶解氧浓度均服从高斯函数分布,为深入了解渔场区的溶解氧水平和特征、建立更精确的渔场预报模型提供了理论依据。The vertical structure of dissolved oxygen is an important factor affecting the vertical activities of yellowfin tuna(Thunnus albacares).In order to better understand the distribution characteristics of dissolved oxygen in Seine yellowfin tuna fisheries and its impact on Seine fishery production in the Central and western Pacific,the vertical structure characteristics of dissolved oxygen concentration of fishery area and the relationship between dissolved oxygen and fish catch spatial or temporal distribution were analyzed.A statistical model of the relationship between dissolved oxygen vertical structure and fishery catch was given.The data adopted was the WOA18 three-dimensional dissolved oxygen dataset and yellowfin tuna fishery production data in the Central and Western Pacific from 2008 to 2017.The results showed that higher catch per unit effort(CPUE)value of yellowfin tuna was mainly concentrated in the western tropical Pacific of 5°S-5°N.The dissolved oxygen concentration in the fishing area decreased with the increase of depth.The concentrations of dissolved oxygen in surface and 50 m depth of the fishery areas were about 195~210μmol∙kg^(-1) and 192~199μmol∙kg^(-1),respectively.CPUEs were concentrated in the areas of 150 and 300 m depth with 147 and 120μmol∙kg^(-1),respectively.There was a negative correlation between the CPUE and the vertical gradient of dissolved oxygen,especially above the thermocline.The model showed that the relationship between the distribution of fishing ground and the dissolved oxygen change at different depths obeyed the gaussian function distribution,which provided a theoretical basis for understanding the level and characteristics of dissolved oxygen in fishery area and establishing a more accurate fishery prediction model.

关 键 词：溶解氧 垂直结构 黄鳍金枪鱼 统计模型 中西太平洋 

分 类 号：S934[农业科学—渔业资源]