Open AccessIn situ target-strength measurement of young hairtail (Trichiurus haumela) in the Yellow Sea
Author(s) -
Xianyong Zhao
Publication year - 2005
Publication title -
ices journal of marine science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 117
eISSN - 1095-9289
pISSN - 1054-3139
DOI - 10.1016/j.icesjms.2005.07.010
Subject(s) - target strength , echo sounding , in situ , fish <actinopterygii> , fishery , confidence interval , abundance (ecology) , oceanography , geology , environmental science , zoology , mineralogy , biology , mathematics , geography , statistics , meteorology
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.
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