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| 基于碳氮稳定同位素的西北印度洋鸢乌贼摄食习性研究 |
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陈静1, 陆化杰1,2,3,4, 王芮1, 欧玉哲1, 陈新军1,2,3,4
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1.上海海洋大学海洋科学学院 上海 201306;2.自然资源部海洋生态监测与修复技术重点实验室 上海 201306;3.国家远洋渔业工程技术研究中心 上海海洋大学 上海 201306;4.农业农村部大洋渔业资源环境科学观测实验站 上海海洋大学 上海 201306
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| 摘要: |
| 内壳是头足类重要的硬组织器官之一,鸢乌贼(Sthenoteuthis oualaniensis)内壳的生长具有不可逆性,是记录鸢乌贼整个生活史信息的良好载体。根据2019年3~5月中国灯光罩网渔船在西北印度洋生产调查期间采集的鸢乌贼样本,利用碳氮稳定同位素技术,研究了个体间的营养生态位关系、摄食习性等。结果表明,雌、雄鸢乌贼个体的内壳δ13C不存在显著性差异(P>0.05),而δ15N存在显著性差异(P<0.05)。营养生态位结果显示,雄性群体的生态位宽幅比雌性群体的要大。雌、雄个体的内壳生长对δ13C均没有显著影响(P>0.05),但雌、雄个体的内壳生长对δ15N均有显著影响(P<0.05), δ13C (1.28‰)和δ15N (3.46‰)值的变化表明鸢乌贼在生长过程中存在洄游现象,营养等级发生改变,且同时期的雌性个体较雄性个体捕食营养层级更高的食物。 |
| 关键词: 鸢乌贼 内壳 稳定同位素 摄食 西北印度洋 |
| DOI：10.11693/hyhz20220200044 |
| 分类号:S931;Q958;X174 |
| 基金项目:国家重点研发计划项目,2019YFD090402号;国家自然科学青年基金项目,NSFC 4150618号。 |
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| FEEDING ECOLOGY OF STHENOTEUTHIS OUALANIENSIS BASED ON CARBON AND NITROGEN STABLE ISOTOPE ANALYSIS IN THE NORTHWEST INDIAN OCEAN |
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CHEN Jing1, LU Hua-Jie1,2,3,4, WANG Rui1, OU Yu-Zhe1, CHEN Xin-Jun1,2,3,4
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1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;2.Key Laboratory of Marine Ecological Monitoring and Restoration Technologies, Ministry of Natural Resources, Shanghai 201306, China;3.National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China;4.Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
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| Abstract: |
| Gladius is one of the most important hard tissues of cephalopods.The gladius is a good carrier for recording the whole life history of Sthenoteuthis oualaniensis.S.oualaniensis samples were collected by Chinese light falling-net fishery in March to May 2019 in the northwest Indian Ocean,from which the trophic niche and feeding ecology of S.oualaniensis were studied using stable isotope technology.Results showed that no significant difference in δ13C between female and male individuals with gladius length (P>0.05),but δ15N of male individuals had significant differences with gladius length (P<0.05).The gladius growth of both males and females had no significant relation with δ13C content (P>0.05),but a significant relation with δ15N (P<0.05).The changes in δ13C (1.28‰) and δ15N (3.46‰) indicate a migratory phenomenon that the migration and trophic level of S.oualaniensis were improved as it grew.Furthermore,the females were in a higher trophic level than males. |
| Key words: Sthenoteuthis oualaniensis gladius stable isotope feeding habits Northwest Indian Ocean |