不同气候模态下东太平洋赤道海域茎柔鱼的食性比较
Comparison of feeding habits of jumbo flying squid(Dosidicus gigas)under different climate conditions in the eastern equatorial Pacific Ocean
朱婷 1贡艺 2李云凯 2高小迪 3张嘉旭1
作者信息
- 1. 上海海洋大学海洋生物资源与管理学院,上海 201306
- 2. 上海海洋大学海洋生物资源与管理学院,上海 201306;大洋渔业资源可持续开发教育部重点实验室,上海 201306;国家远洋渔业工程技术研究中心,上海 201306;农业农村部大洋渔业开发重点实验室,上海 201306
- 3. 中国水产科学研究院东海水产研究所,上海 200090
- 折叠
摘要
为了解气候异常变化对茎柔鱼(Dosidicus gigas)摄食行为的潜在影响,采用基于形态学和DNA条形码技术的胃含物分析对东太平洋赤道海域不同气候模态(2017年的正常气候时期和2020年的La Niña事件发生时期)下的茎柔鱼饵料组成进行比较分析.结果表明:两种模态下,荧串光鱼(Vinciguerria lucetia)、朗明灯鱼(Diogenichthys laternatus)、翼足目(Pteropoda)和头足类是茎柔鱼的优势饵料生物,茎柔鱼在正常气候时期,还摄食褶胸鱼(Sternoptyx diaphana)和镜蛤属(Dosinia sp.),而在La Nina发生时期则会摄食墨西哥尾灯鱼(Triphoturus mexicanus)和尖菱蝶螺(Clio pyramidata);Amundsen图示法发现,茎柔鱼会摄食一些稀有饵料,属于高表型内贡献类型,是广食性鱼类;Shannon多样性指数分析显示,正常时期茎柔鱼的饵料组成多样性显著高于La Niña发生时期;NMDS分析显示,两个时期茎柔鱼存在一定食性分化,而La Niña发生时期茎柔鱼个体间食性差异更大;GⅡ弦图及SIMPER相似性分析显示,不同气候模态下茎柔鱼的饵料差异主要体现在褶胸鱼和镜蛤属.研究表明,La Niña事件对茎柔鱼的摄食产生了显著影响.
Abstract
In order to comprehend the potential effects of abnormal climate changes on feeding behavior of jumbo flying squid,Dosidicus gigas,items and amounts of stomach content were determined in jumbo flying squid D.gigas collected in June and July of 2017 Normal period and July and August of 2020 La Niña period in the east-ern equatorial Pacific Ocean by morphological methods and DNA barcoding technology.The results showed that Vinciguerria lucetia,Diogenichthys laternatus,Pteropods and Cephalopods were the main dominant preys of jumbo flying squid in the two climate modes.During the normal climatic period,Sternoptyx diaphana and Dosinia spp.were also consumed by jumbo flying squid,while during the La Niña period,Triphoturus mexicanus and Clio pyra-midata were included.The Amundsen's Diagram revealed that the jumbo flying squid has extensive feeding,exhibi-ting a high within-phenotype component(WPC)type.The Shannon diversity index indicated a higher diversity lev-el in the diet composition of jumbo flying squid during Normal period compared to the La Niña period.Non-Metric Multidimensional Scale(NMDS)analysis indicated the significant differences in the feeding habits of jumbo flying squid between the two periods and the preys in La Niña period were more generalized.The GⅡ chord diagram and SIMPER similarity results highlighted the S.diaphana and Dosinia spp.as the main contributors to the feeding differences under different climate modes.The significance of constructing a detailed food web was emphasized in the eastern equatorial Pacific Ocean and significance of investigating its energy flow pathway.The findings high-lighted that La Niña event can significantly impact the feeding behavior of feeding habits of jumbo flying squid under different climate change.
关键词
茎柔鱼/胃含物分析/DNA条形码/气候变化Key words
Dosidicus gigas/stomach content analysis/DNA barcoding/climate variability引用本文复制引用
基金项目
国家自然科学基金(31900333)
国家自然科学基金(42276092)
出版年
2024
NETL
NSTL
维普
万方数据