中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake

文献类型:期刊论文

作者Zhang, Huan1,2; Wu, Gongguo1; Zhang, Huan1; Xie, Ping1,2; Xu, Jun1; Zhou, Qiong2
刊名HYDROBIOLOGIA
出版日期2013-02-01
卷号703期号:1页码:247-256
关键词Coilia brachygnathus Dietary shifts Lake Poyang Stable isotope analysis Trophic interaction
ISSN号0018-8158
通讯作者Xie, P (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, States Key Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
中文摘要Seasonal water-level changes in floodplain lakes can induce variations in primary and secondary production, thus affecting trophic interactions. In this study, we tested the latter by studying size- and temporal hydrology-related shifts in the diet of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) from Lake Poyang. During the wet season, delta C-13 values ranged from -28.2aEuro degrees for small anchovies to -24.6aEuro degrees for larger individuals, but delta N-15 ranged from 18.9aEuro degrees for smaller fish to 12.4aEuro degrees for larger fish. Significant C-13-enrichment and N-15-depletion occurred with increasing size, revealing that different carbon sources were used as the fish grew. Given the high hydrologic fluctuation levels, significant differences in delta C-13 values were observed among larger anchovies between seasons, indicating a temporal dietary shift. Anchovies fed primarily on shrimp and fish during the low-water season despite the predominance of zooplankton during the two seasons studied, which indicated increased piscivorous reliance. C. brachygnathus exhibited higher delta N-15 values during the wet season because the food items were N-15-enriched. Human waste brought by floods could be another possible interpretation. Considering C. brachygnathus is an important link between plankton production and higher piscivorous trophic levels, changes in the species are expected to affect the functioning of lake food webs along the trophic pathway.
英文摘要Seasonal water-level changes in floodplain lakes can induce variations in primary and secondary production, thus affecting trophic interactions. In this study, we tested the latter by studying size- and temporal hydrology-related shifts in the diet of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) from Lake Poyang. During the wet season, delta C-13 values ranged from -28.2aEuro degrees for small anchovies to -24.6aEuro degrees for larger individuals, but delta N-15 ranged from 18.9aEuro degrees for smaller fish to 12.4aEuro degrees for larger fish. Significant C-13-enrichment and N-15-depletion occurred with increasing size, revealing that different carbon sources were used as the fish grew. Given the high hydrologic fluctuation levels, significant differences in delta C-13 values were observed among larger anchovies between seasons, indicating a temporal dietary shift. Anchovies fed primarily on shrimp and fish during the low-water season despite the predominance of zooplankton during the two seasons studied, which indicated increased piscivorous reliance. C. brachygnathus exhibited higher delta N-15 values during the wet season because the food items were N-15-enriched. Human waste brought by floods could be another possible interpretation. Considering C. brachygnathus is an important link between plankton production and higher piscivorous trophic levels, changes in the species are expected to affect the functioning of lake food webs along the trophic pathway.
WOS标题词Science & Technology ; Life Sciences & Biomedicine
类目[WOS]Marine & Freshwater Biology
研究领域[WOS]Marine & Freshwater Biology
关键词[WOS]STABLE-ISOTOPES ; FOOD-WEB ; WATER-LEVEL ; TROPHIC POSITION ; ORGANIC-MATTER ; FISH ; NITROGEN ; CARBON ; POYANG ; RIVER
收录类别SCI
资助信息National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428]
语种英语
WOS记录号WOS:000312782000019
公开日期2013-10-31
源URL[http://ir.ihb.ac.cn/handle/342005/19294]  
专题水生生物研究所_淡水生态学研究中心_期刊论文
作者单位1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, States Key Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Huan,Wu, Gongguo,Zhang, Huan,et al. Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake[J]. HYDROBIOLOGIA,2013,703(1):247-256.
APA Zhang, Huan,Wu, Gongguo,Zhang, Huan,Xie, Ping,Xu, Jun,&Zhou, Qiong.(2013).Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake.HYDROBIOLOGIA,703(1),247-256.
MLA Zhang, Huan,et al."Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake".HYDROBIOLOGIA 703.1(2013):247-256.

入库方式: OAI收割

来源:水生生物研究所

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