Ecological conversion efficiency and its influencers in twelve species of fish in the Yellow Sea Ecosystem
文献类型: 外文期刊
作者: Tang, Qisheng 1 ; Guo, Xuewu 1 ; Sun, Yao 1 ; Zhang, Bo 1 ;
作者机构: 1.Chinese Acad Fisheries Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
关键词: ecological conversion efficiency;fish;influencers;relationship between ecological conversion efficiency and trophic level;Yellow Sea
期刊名称:JOURNAL OF MARINE SYSTEMS ( 影响因子:2.542; 五年影响因子:3.136 )
ISSN: 0924-7963
年卷期: 2007 年 67 卷 3-4 期
页码:
收录情况: SCI
摘要: The ecological conversion efficiencies in twelve species of fish in the Yellow Sea Ecosystem, i.e., anchovy (Engraulis japonicus), rednose anchovy (Thrissa kammalensis), chub mackerel (Scomber japonicus), halfbeak (Hyporhamphus sajori), gizzard shad (Konosirus punctatus), sand lance (Arnmodytes personatus), red seabream (Pagrus major), black porgy (Acanthopagrus schlegeli), black rockfish (Sebastes schlegeli), finespot goby (Chaeturichthys stigmatias), tiger puffer (Takzfugu rubripes), and fat greenling (Hexagrammos otakii), were estimated through experiments conducted either in situ or in a laboratory. The ecological conversion efficiencies were significantly different among these species. As indicated, the food conversion efficiencies and the energy conversion efficiencies varied from 12.9% to 42.1% and from 12.7% to 43.0%, respectively. Water temperature and ration level are the main factors influencing the ecological conversion efficiencies of marine fish. The higher conversion efficiency of a given species in a natural ecosystem is acquired only under the moderate environment conditions. A negative relationship between ecological conversion efficiency and trophic level among ten species was observed. Such a relationship indicates that the ecological efficiency in the upper trophic levels would increase after fishing down marine food web in the Yellow Sea ecosystem. (c) 2006 Elsevier B.V All rights reserved.
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