黑潮主轴弯曲对西北太平洋柔鱼资源补充量影响的动力学分析  

Kinetics on effect of Kuroshio axis meander on the resource recruitment of neon flying squid(Ommastrephes bartramii)in the Northwest Pacific Ocean

作　　者：许智欣 李曰嵩[1,2,3,4] 潘灵芝 余为[1,2,3,4] 张瑜[1,2,3,4] XU Zhixin;LI Yuesong;PAN Lingzhi;YU Wei;ZHANG Yu(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,Chi-na;Collaborative Innovation Center for Distant-water Fisheries,Shanghai 201306,China;East China Sea Forecasting Center,State Oceanic Ad-ministration,Shanghai 200081,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术研究中心,上海201306 [3]大洋渔业资源可持续开发教育部重点实验室,上海201306 [4]远洋渔业协同创新中心,上海201306 [5]国家海洋局东海预报中心,上海200081

出　　处：《大连海洋大学学报》2024年第1期144-152,共9页Journal of Dalian Ocean University

基　　金：国家重点研发计划“蓝色粮仓科技创新”项目(2018YFD0900906);国家自然科学基金联合基金重点项目(U1609202);国家重点研发计划(2016YFC1400903);上海市科委地方院校能力建设计划项目(15320502200)。

摘　　要：为研究黑潮主轴弯曲产生的物理环境变动对柔鱼(Ommastrephes bartarmii)资源补充量的影响,采用物理模型(FVCOM-Global)耦合个体模型(IBM)的方法模拟西北太平洋柔鱼冬春生群早期生活史阶段(70 d)的输运分布和资源补充量,利用3月份黑潮主轴线140°E重心最南点位于32°N以南来判断大、小弯曲的路径与柔鱼资源补充量的相关性。结果表明:2007—2016年西北太平洋柔鱼的资源补充量有年际波动,该波动与3月份黑潮主轴弯曲有明显相关性(R^(2)=0.71),即黑潮主轴呈小弯曲年份时,柔鱼仔幼鱼被向北或东北即25°N以北、145°E以东的海域输运,在该海域中分布的柔鱼仔幼鱼数量占比越高,相对补充量就越高,并呈现较好的正相关性(R^(2)=0.89),其过程中产生的黑潮暖流流量在25°N以北海域体现明显,在流速为0.2~0.6 m/s、平均水温为20.2℃且等温线偏北的情况下,可导致该海域柔鱼仔幼鱼群的分布更加密集;在垂向分布上,不同年份垂向分布与补充量存在一定的正相关性(R^(2)=0.65)。研究表明,3月份黑潮主轴弯曲是影响柔鱼资源补充量的关键因素之一,这为预测当年柔鱼资源补充量的丰歉提供了科学依据。In order to evaluate the effect of physical environment changes caused by the meander of the Kuroshio axis on the resource recruitment of neon flying squid(Ommastrephes bartarmii),the transport distribution and re-source recruitment of the early life history stage(70 d)of the winter-spring cohorts of O.bartarmii were simulated in the Northwest Pacific Ocean by the physical model(FVCOM-Global)coupled with the individual model(IBM).The correlation between the large and small meander paths and the resource recruitment of the squid was judged by using the southernmost point of the center of gravity of the Kuroshio main axis of 140°E in March,which was located south of 32°N.The results showed that there was an interannual fluctuation in the recruitment of the squid in the Northwest Pacific Ocean from 2007 to 2016,which was significantly correlated with the Kuroshio axis meander in March(R^(2)=0.71).In other words,in the year of small meander,the larvae and juveniles of the squid were transported northward or northeastward,north of 25°N and east of 145°E.The higher the proportion of the ne-on flying squid larvae,and juveniles distributed in this sea area were,the higher the relative recruitment was,with a good positive correlation(R^(2)=0.89).The Kuroshio warm current produced in the process was obvious in the sea area north of 25°N.When the flow rate was 0.2-0.6 m/s,the distribution of larvae and juveniles of the neon fly-ing squid in the sea area was denser at average water temperature of 20.2℃and the northerly isotherm.In the ver-tical distribution,there was a positive correlation between the vertical distribution and recruitment of different years(R^(2)=0.65).The findings indicated that the meander of the Kuroshio axis in March was one of the key factors af-fecting the recruitment of neon flying squid resources,which also provides a scientific basis for predicting the abun-dance of the resources in that year.

关 键 词：柔鱼 西北太平洋 黑潮主轴弯曲 补充量 IBM模型 

分 类 号：S931[农业科学—渔业资源]