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ICES Journal of Marine Science: Journal du Conseil 2006 63(1):46-51; doi:10.1016/j.icesjms.2005.07.010
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© 2005 International Council for the Exploration of the Sea

In situ target-strength measurement of young hairtail (Trichiurus haumela) in the Yellow Sea

Xianyong Zhaoa,b,*

a College of Marine Life Science, Ocean University of China, Qingdao, China
b Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 106 Nanjing Road, Qingdao 266071, China

*Correspondence to X. Zhao: Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 106 Nanjing Road, Qingdao 266071, China; tel: +86 532 858 353 63; fax: +86 532 858 115 14. e-mail: zhaoxy{at}ysfri.ac.cn.

The target strength of hairtail (Trichiurus haumela) in the Yellow Sea was measured in situ with a 38 kHz, split-beam echosounder on 2 January 2001. The fish measured were of the 2000 year class, its anal length ranged from 62 to 115 mm, with a mean of 89.8 mm. The mean target strength of these young hairtail was estimated to be –49.2 dB, with a 95% confidence interval of (–49.4, –49.0) dB. This provided a rare and useful reference for the acoustic-abundance estimation of hairtail.

Keywords: hairtail, target strength, Yellow Sea

Received 29 May 2003; accepted 30 July 2005.


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