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Role of body size and temporal hydrology in the dietary shifts of shortjaw tapertail anchovy Coilia brachygnathus (Actinopterygii, Engraulidae) in a large floodplain lake
Zhang, Huan1,2; Wu, Gongguo1; Zhang, Huan1; Xie, Ping1,2; Xu, Jun1; Zhou, Qiong2; Xie, P (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, States Key Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
2013-02-01
Source PublicationHYDROBIOLOGIA
ISSN0018-8158
Volume703Issue:1Pages:247-256
AbstractSeasonal 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.; 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.
SubtypeArticle
KeywordCoilia Brachygnathus Dietary Shifts Lake Poyang Stable Isotope Analysis Trophic Interaction
Department[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
DOI10.1007/s10750-012-1370-z
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428]
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS IDWOS:000312782000019
WOS KeywordSTABLE-ISOTOPES ; FOOD-WEB ; WATER-LEVEL ; TROPHIC POSITION ; ORGANIC-MATTER ; FISH ; NITROGEN ; CARBON ; POYANG ; RIVER
Funding OrganizationNational Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428] ; National Basic Research Program [2008CB418001-1]; National Natural Science Foundation of China [31170439, 30870428]
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/19294
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorXie, P (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, States Key Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
Affiliation1.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
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.,...&Xie, P .(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.
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