Feeding habit study of Anchovy(<i>Engraulis japonicus</i>)in the central and southern part of the Huanghai Sea with stable isotope techniques

GUO Xu-peng; LI Zhong-yi; JIN Xian-shi; DAI Fang-qun

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GUO Xu-peng, LI Zhong-yi, JIN Xian-shi, DAI Fang-qun. Feeding habit study of Anchovy(Engraulis japonicus)in the central and southern part of the Huanghai Sea with stable isotope techniques[J]. Haiyang Xuebao, 2007, 29(2): 98-104.

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GUO Xu-peng, LI Zhong-yi, JIN Xian-shi, DAI Fang-qun. Feeding habit study of Anchovy(Engraulis japonicus)in the central and southern part of the Huanghai Sea with stable isotope techniques[J]. Haiyang Xuebao, 2007, 29(2): 98-104.

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Feeding habit study of Anchovy(Engraulis japonicus)in the central and southern part of the Huanghai Sea with stable isotope techniques

1.
Key Laboratory for Sustainable Utilization of Marine Fisheries Resource, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Qingdao 266071, China;College of Ocean, Shanghai Fisheries University, Shanghai 200090, China
2.
Key Laboratory for Sustainable Utilization of Marine Fisheries Resource, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Qingdao 266071, China;Department of Oceanography and Environmental Science, Xiamen University, Xiamen 361005, China
3.
Key Laboratory for Sustainable Utilization of Marine Fisheries Resource, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Qingdao 266071, China

Received Date: 2005-09-08
Rev Recd Date: 2006-05-20

Abstract

Abstract

Stable isotope techniques are commonly used to represent the trophic structure of aquatic systems.Based on the bottom trawl surveys in the central and southern part of the Huanghai Sea and adjacent sea area of Changjing River Estuary during the spawning season of Spring in 2005,we mainly focus on the stable carbon(¹³C/¹²C) and nitrogen isotope(¹⁵N/¹⁴N) ratios of anchovy and its potential food,such as zooplankt on,Euphausia pacifica,larvae and juvenile fish,Leptochela gracilis,Loligo beka in order to acknow ledge the feeding habit of anchovy.Application of ¹³C and ¹⁵N in dietary study depends upon the differentiation in the isotopic composition of various food sources.The ¹³C and ¹⁵N values of anchovy and its potential food indicated that its food sources in these areas were composed of zooplankt on,Euphausia pacifica,fish larvae and juvenile fish.Especially,500~900 m zooplankt on was the most important dietary component for anchovy,accounting for 61%~84% of the total food by weight,the food proportion of the fish larvae and juvenile fish was 16%~21%,which was less than the results with the method of stomach content analysis;the variations in δ¹³C and δ¹⁵N values of anchovy in the central of the Huanghai Sea were higher than the area of southern part of the Huanghai Sea and adjacent sea of Changjing River Estuary,the reason were likely to difference between the sources of Anchovy energy or the length of the food chain in the different areas of the central and southern of Huanghai Sea and adjacent sea area of Changjiang River Estuary.Stableiso to peanalysis(δ¹³C and δ¹⁵N) can be a powerful tool in both identifying the source of organic matter that supports fish production and investigating food web remains untested using traditional dietary methods in the modern ecology.
- Anchovy,
- feeding habit,
- carbon and nitrogen stable isotope,
- the central and southern Huanghai Sea

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References(34)

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