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Feeding ecology of hairtail Trichiurus margarites and largehead hairtail Trichiurus lepturus in the Beibu Gulf, the South China Sea

文献类型: 外文期刊

作者: Yan Yunrong 1 ; Hou Gang 1 ; Chen Junlan 1 ; Lu Huosheng 1 ; Jin Xianshi 4 ;

作者机构: 1.Guangdong Ocean Univ, Coll Fisheries, Zhanjiang 524088, Peoples R China

2.Guangdong Ocean Univ, Ctr S China Sea Fisheries Resources Monitoring &, Zhanjiang 524088, Peoples R China

3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

4.Chinese Acad Fisheries Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

5.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

关键词: feeding ecology;Trichiurus margarites;Trichiurus lepturus;ontogenetic diet shift;the Beibu Gulf;South China Sea

期刊名称:CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY ( 影响因子:1.068; 五年影响因子:0.983 )

ISSN: 0254-4059

年卷期: 2011 年 29 卷 1 期

页码:

收录情况: SCI

摘要: We evaluated the feeding ecology of largehead hairtail (Trichiurus lepturus) and hairtail (T. margarites). We collected specimens from fishing ports in the Beibu Gulf (Gulf of Tonkin) from October 2008 to September 2009 and analyzed their gut contents. We collected 857 T. lepturus and 666 T. margarites samples. The number of stomachs examined in this study was sufficient to describe the monthly and ontogenetic diet shifts for the two species, as indicated by the trophic diversity curves. T. lepturus was a general omnivore, feeding primarily on Bregmaceros rarisquamosu, Decapterus maruadsi, and Acetes chinensis. Conversely, T. margarites preyed primarily on D. maruadsi, B. rarisquamosus, B. nectabanus, and A. chinensis. Both species exhibited distinct ontogenetic diet shifts. Although the two hairtail specie fed on similar sources in the same habitat, the diet overlap was relatively low. Our results suggest that hairtail play an important role in controlling small pelagic and benthic fish populations in the gulf. This trophic correlation shall be used for developing a marine ecosystem model for the Beibu Gulf.

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