The response of the diets of four carnivorous fishes to variations in the Yellow Sea ecosystem
文献类型： 外文期刊
作者： Jin, Xianshi 1 ; Zhang, Bo 1 ; Xue, Ying 1 ;
作者机构： 1.CAFS, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
2.Ocean Univ China, Qingdao 266003, Peoples R China
关键词： Carnivorous fishes;Diet variation;Prey abundance;Predator-prey relationships;Yellow Sea ecosystem
期刊名称：DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY （ 影响因子：2.732； 五年影响因子：3.419 ）
ISSN： 0967-0645
年卷期： 2010 年 57 卷 11-12 期
页码：
收录情况： SCI
摘要： The stomach contents of Spanish mackerel (Scomberomorus niphonius), snailfish (Liparis tanakae), anglerfish (Lophius litulon), and Pacific cod (Gadus macrocephalus) from the Yellow Sea during 1985-1987 and 2000-2002 were analyzed. The diets of these four carnivorous species changed over time, showing that the importance of the previous major prey, Japanese anchovy (Engraulis japonicus), had greatly decreased, owing to its declining abundance, and that intake of Crangon affinis had increased. Spanish mackerel foraged for more food, particularly for other small pelagic species in addition to Japanese anchovy, causing an increase in its niche width in recent years, whereas the other three demersal carnivorous species had mainly targeted the small benthic shrimp C. affinis, and their niche widths had reduced in the later years. This phenomenon may be an adaptive response to changes in the food availability of the ecosystem, indicating a change in the food web and community structure of the Yellow Sea ecosystem. Changes in the composition of the diet of major predators may be an indicator of changes in a marine ecosystem. (C) 2010 Published by Elsevier Ltd.
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