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δ^(13)C不存在显著性差异(P>0.05),而δ^(15)N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δ^(13)C均没有显著影响(P>0.05),但雌、雄个体的内壳生长对δ^(15)N均有显著影响(P<0.05),δ^(13)C(1.28‰)和δ^(15)N(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。
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 inδ^(13)C between female and male individuals with gladius length(P>0.05),butδ^(15)N of male individuals had significant differences with gladius length(P<0.05).The gladius growth of both males and females had no significant relation withδ^(13)C content(P>0.05),but a significant relation withδ^(15)N(P<0.05).The changes inδ^(13)C(1.28‰)andδ^(15)N(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.
作者
陈静
陆化杰
王芮
欧玉哲
陈新军
CHEN Jing;LU Hua-Jie;WANG Rui;OU Yu-Zhe;CHEN Xin-Jun(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Marine Ecological Monitoring and Restoration Technologies,Ministry of Natural Resources,Shanghai 201306,China;National Distant-water Fisheries Engineering Research Center,Shanghai Ocean University,Shanghai 201306,China;Scientific Observing and Experimental Station of Oceanic Fishery Resources,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China)
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2022年第5期1250-1257,共8页
Oceanologia Et Limnologia Sinica
基金
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。
关键词
鸢乌贼
内壳
稳定同位素
摄食
西北印度洋
Sthenoteuthis oualaniensis
gladius
stable isotope
feeding habits
Northwest Indian Ocean
