摘要
利用稳定同位素技术分析了东海银鲳(Pampus argenteus)及其可能摄食饵料的碳、氮稳定同位素比值,以期探讨东海银鲳可能的食物来源。结果表明:东海区银鲳平均碳(δ13C)和氮(δ15N)稳定同位素比值分别为-18.22‰、8.16‰,其可能摄食饵料的δ13C值变化范围为-17.33‰^-21.58‰,差值为4.25‰,δ15N值变化范围为3.89‰~7.96‰,差值为4.07‰;东海银鲳可能的食物来源主要为箭虫、虾类、水母类、头足类、仔稚鱼和浮游动物等,其中箭虫为主要可能的食物来源,其贡献率为24%~78%,平均贡献率为57%;银鲳可能摄食的其他饵料中,贡献率从大到小依次为虾类、水母类、头足类、仔稚鱼、>1000μm浮游动物、500~1000μm浮游动物和100~500μm浮游动物,其平均贡献率分别为11.8%、8.4%、7.1%、5.0%、4.9%、3.2%和2.6%。由以上结果可知,银鲳是一种广食性鱼类,其饵料种类较多,碳和氮的来源均较为复杂。
By using stable isotope techniques, this paper analyzed the carbon and nitrogen stable isotope ratios of East China Sea silver pomfret （Pampus argenteus） and its potential feed materials, aimed to approach the potential food sources of P. argenteus in the Sea. The average δ↑13C and δ↑15N values of the P. argenteus were -18.22‰ and 8. 16‰, and the δ↑13C and δ↑15N of the potential feed materials ranged in -17.33‰-21.58‰ and 3.89‰-7.96‰, with the differenee of 4. 25‰ and 4. 07‰, respectively. The potential food sources of the P. argenteus were mainly Sagitta, shrimps, jellyfish, eephalopods, fish larva, and zooplanktons, among which, Sagitta was the most important food source and eontributed 24% -78% （ averagely 57% ） of the total food sources, followed by shrimps （ 11.8% ） , jellyfish （ 8.4% ）, cephalopods （ 7.1% ）, fish larva （5.0%） , 〉1000 μm zooplanktons （4. 9% ） , 500-1000 μm zooplanktons （3.2%） , and 100-500 μm zooplanktons （2. 6% ）. The results indicated that P. argenteus was an omnivorous fish, having different food sources from zooplankton to fish and complicated carbon and nitrogen sources.
出处
《生态学杂志》
CAS
CSCD
北大核心
2011年第7期1565-1569,共5页
Chinese Journal of Ecology
基金
"十二五"国家科技支撑项目(2011BAD13B01)
上海市科技兴农重点攻关项目(沪农科攻字(2007)第4-1号)
中央级公益性科研院所基本科研业务费(东2008M14
东2009M05)资助
关键词
银鲳
食性
东海
碳氮稳定同位素
Pampus argenteus
feeding habit
East China Sea
carbon and nitrogen stableisotopes.
