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题名: Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake
作者: Zhang, Huan1, 2; Wu, Gongguo1; Zhang, Huan1; Xie, Ping1, 2; Xu, Jun1; Zhou, Qiong2
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.
关键词: Coilia brachygnathus ; Dietary shifts ; Lake Poyang ; Stable isotope analysis ; Trophic interaction
刊名: HYDROBIOLOGIA
发表日期: 2013-02-01
DOI: 10.1007/s10750-012-1370-z
卷: 703, 期:1, 页:247-256
收录类别: SCI
文章类型: Article
部门归属: [Zhang, Huan ; Wu, Gongguo ; Zhang, Huan ; Xie, Ping ; Xu, Jun] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, States Key Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China ; [Zhang, Huan ; Xie, Ping ; Zhou, Qiong] Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428]
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
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.
关键词[WOS]: STABLE-ISOTOPES ; FOOD-WEB ; WATER-LEVEL ; TROPHIC POSITION ; ORGANIC-MATTER ; FISH ; NITROGEN ; CARBON ; POYANG ; RIVER
语种: 英语
WOS记录号: WOS:000312782000019
ISSN号: 0018-8158
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19294
Appears in Collections:淡水生态学研究中心_期刊论文

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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

Recommended Citation:
Zhang, H; Wu, GG; Zhang, H; Xie, P; Xu, J; Zhou, Q.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,2013,703(1):247-256
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