西北太平洋公海柔鱼和日本爪乌贼个体发育期营养生态位变化分析  

Analysis of trophic niche changes during the individual developmental period of Ommastrephes bartramii and Onychoteuthis borealijaponicus in the high sea of Northwest Pacific Ocean

作　　者：刘必林[1,2,3,4] 刘庭羽 宋林玮 LIU Bilin;LIU Tingyu;SONG Linwei(College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai 201306,China;Key Laboratory of SustainableExploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China;Key Laboratory of Sustainable Utilization of Oceanic Fisheries,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋生物资源与管理学院,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]农业农村部大洋渔业可持续利用重点实验室,上海201306

出　　处：《上海海洋大学学报》2024年第4期868-877,共10页Journal of Shanghai Ocean University

基　　金：上海市高校特聘教授“东方学者”岗位跟踪计划(GZ2022011);农业农村部全球渔业资源调查监测评估(公海渔业资源综合科学调查)专项(D-8025-23-1002)。

摘　　要：为了更好地了解柔鱼和日本爪乌贼个体发育期营养生态位变化,根据2021—2022年“淞航”号渔业资源调查船所采集36尾柔鱼和30尾日本爪乌贼样本,对其眼睛晶体进行了碳氮稳定同位素分析。结果表明:柔鱼个体δ^(13)C、δ^(15)N值分别为0.10‰~1.68‰、0.79‰~7.51‰;日本爪乌贼个体δ^(13)C、δ^(15)N值分别为0.15‰~1.20‰、0.81‰~7.05‰。柔鱼、日本爪乌贼生态位面积分别为0.40‰^(2)~5.85‰^(2)、0.27‰^(2)~5.36‰^(2)。GAM模型分析显示:柔鱼眼睛晶体δ^(13)C、δ^(15)N与晶体直径均具有显著的相关性,偏差解释率分别为31.9%和34.3%。日本爪乌贼眼睛晶体δ^(13)C、δ^(15)N与晶体直径均具有显著的相关性,偏差解释率分别为12.9%和19.4%。分析认为,柔鱼和日本爪乌贼的摄食柔性是导致其眼睛晶体δ^(13)C、δ^(15)N值随胴体增大无规律变化的原因;个体同位素变化幅度较大反映了西北太平洋黑潮-亲潮过渡区同位素基线值变化幅度较大;83%的柔鱼样本和80%的日本爪乌贼样本个体间的δ^(13)C的生态位幅度较小,但是δ^(15)N的生态位幅度较大,所以该海域的柔鱼、日本爪乌贼个体摄食水平存在差异;GAM模型显示个体发育和基线值是影响组织δ^(13)C、δ^(15)N值的因素。In order to better understand the nutritional niche changes during the ontogeny period of Ommastrephes bartramii and Onychoteuthis borealijaponicus,36 O.bartramii and 30 O.borealijaponicus samples were collected from"Songhang"fishery resources survey ship in 2021-2022,and stable isotopic analysis was conducted on their eye crystals.The results show that:the variation in individual δ~(13)C and δ~(15)N values for O.bartramii ranged from 0.10‰ to 1.68‰ and 0.79‰to 7.51‰,respectively;and the variation in individual δ~(13)C and δ~(15)N values for O.borealijaponicus ranged from 0.15‰to 1.20‰a nd 0.81‰to 7.05‰,respectively.The niche area change range for O.bartramii and O.borealijaponicus was 0.40‰2-5.85‰ 2 and 0.27‰2-5.36‰2,respectively.GAM model analysis showed that the δ~(13)C and δ~(15)N values of O.bartramii eye crystals had a significant correlation with crystal diameter,with deviation interpretation rates of 31.9%and 34.3%,respectively.Similarly,the δ~(13)C and δ~(15)N values of O.borealijaponicus eye crystals were significantly correlated with crystal diameter,with deviation interpretation rates of 12.9%and 19.4%,respectively.According to the analysis,O.bartramii and O.borealijaponicus feeding flexibility is responsible for the irregular change of δ~(13)C and δ~(15)N values with increasing carcass size.The larger magnitude of individual isotopic changes reflects the greater magnitude of baseline isotopic values in the Kuroshio-Oyashio transition zone in Northwest Pacific Ocean.Additional 83%of the O.bartramii samples and 80% of the O.borealijaponicus samples niche amplitude of δ~(13)C was small,but niche amplitude of δ~(15)N was larger,so the feeding level of O.bartramii and O.borealijaponicus in this area is different.The GAM model showed that individual growth and baseline values were factors affecting the tissue δ~(13)C and δ~(15)N values.

关 键 词：西北太平洋 柔鱼 日本爪乌贼 眼睛晶体 碳氮稳定同位素 GAM模型 

分 类 号：S931.1[农业科学—渔业资源]