Trophic niche differences between two congeneric goby species: evidence for ontogenetic diet shift and habitat use

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	Trophic niche differences between two congeneric goby species: evidence for ontogenetic diet shift and habitat use
	Guo, Zhiqiang 1,2,3; Liu, Jiashou 1; Lek, Sovan 1,2; Li, Zhongjie 1; Zhu, Fengyue 1; Tang, Jianfeng 1; Cucherousset, Julien 2
刊名	AQUATIC BIOLOGY
	2014
卷号	20 期号:1 页码:23-33
关键词	Species co-occurrence Niche differentiation Ontogenetic niche shift Stable isotope analyses Rhinogobius Gut content analysis
ISSN号	1864-7790
通讯作者	Liu, JS (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
中文摘要	Food partitioning is one of the primary mechanisms facilitating the stable co-occurrence of competing species, but very few studies have investigated how food resource use of competing and closely related species varies with life-history stages and habitats. In Lake Erhai (China), the trophic niche of 2 congeneric and co-occurring invasive goby species (Rhinogobius cliffordpopei and R. giurinus) was examined to test the existence of an ontogenetic diet shift and to determine potential differences in trophic niche between species within a habitat and between habitats (i.e. littoral and profundal) within species. Results obtained from gut content and stable isotope analyses revealed a strong trophic niche shift during ontogeny, whereby juveniles mainly consumed macrozooplankton while sub-adults and adults increasingly consumed aquatic insects and Tubificidae. The trophic niche of juveniles was similar between species in each of the 2 habitats but significantly different for sub-adults and adults, notably in littoral habitat. Moreover, the trophic niche was similar between habitats for juveniles of each species, whereas it differed significantly between habitats for sub-adults and adults. This study demonstrates the importance of ontogeny and shows that habitat use can significantly affect food resource use and trophic relationships between 2 co-occurring fish species.
英文摘要	Food partitioning is one of the primary mechanisms facilitating the stable co-occurrence of competing species, but very few studies have investigated how food resource use of competing and closely related species varies with life-history stages and habitats. In Lake Erhai (China), the trophic niche of 2 congeneric and co-occurring invasive goby species (Rhinogobius cliffordpopei and R. giurinus) was examined to test the existence of an ontogenetic diet shift and to determine potential differences in trophic niche between species within a habitat and between habitats (i.e. littoral and profundal) within species. Results obtained from gut content and stable isotope analyses revealed a strong trophic niche shift during ontogeny, whereby juveniles mainly consumed macrozooplankton while sub-adults and adults increasingly consumed aquatic insects and Tubificidae. The trophic niche of juveniles was similar between species in each of the 2 habitats but significantly different for sub-adults and adults, notably in littoral habitat. Moreover, the trophic niche was similar between habitats for juveniles of each species, whereas it differed significantly between habitats for sub-adults and adults. This study demonstrates the importance of ontogeny and shows that habitat use can significantly affect food resource use and trophic relationships between 2 co-occurring fish species.
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]	STOMACH CONTENTS ANALYSIS ; FEEDING STRATEGY ; LIFE-HISTORY ; FISH ; FOOD ; CHINA ; RIVER ; ZONE ; SIZE ; LAKE
收录类别	SCI
资助信息	National Natural Science Foundation of China [31172387]; Major Science and Technology Program for Water Pollution Control and Treatment of China [2012ZX07105-004]; National S&T Supporting Program [2012BAD25B08]; European Union [PERG08-GA-2010-276969]
语种	英语
WOS记录号	WOS:000330614600003
公开日期	2014-08-07
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20030]
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, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Univ Toulouse 3, CNRS, ENFA, UMR5174 EDB Lab Evolut & Div Biol, F-31062 Toulouse, France 3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Oceanog Trop, Guangzhou 510301, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Guo, Zhiqiang,Liu, Jiashou,Lek, Sovan,et al. Trophic niche differences between two congeneric goby species: evidence for ontogenetic diet shift and habitat use[J]. AQUATIC BIOLOGY,2014,20(1):23-33.
APA	Guo, Zhiqiang.,Liu, Jiashou.,Lek, Sovan.,Li, Zhongjie.,Zhu, Fengyue.,...&Cucherousset, Julien.(2014).Trophic niche differences between two congeneric goby species: evidence for ontogenetic diet shift and habitat use.AQUATIC BIOLOGY,20(1),23-33.
MLA	Guo, Zhiqiang,et al."Trophic niche differences between two congeneric goby species: evidence for ontogenetic diet shift and habitat use".AQUATIC BIOLOGY 20.1(2014):23-33.