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http://dx.doi.org/10.3796/KSFT.2017.53.4.376

The relationship between fish and zooplankton in south-western region of the East Sea using hydroacoustics  

HAN, Inseong (Ocean Climate & Ecology Division, National Institute of Fisheries Sciences)
OH, Wooseok (Division of Fisheries Science, Chonnam National University)
YOON, Eun-A (School of Marine Technology, Chonnam National University)
SUH, Youngsang (Ocean Climate & Ecology Division, National Institute of Fisheries Sciences)
LEE, Kyounghoon (School of Marine Technology, Chonnam National University)
SHIN, Hyeongho (School of Marine Technology, Chonnam National University)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.53, no.4, 2017 , pp. 376-385 More about this Journal
Abstract
This study was conducted to understand the relationships between fish and zooplankton of distribution in the coastal waters of the East Sea from May to August 2016 using hydroacoustic. To distinguish between fish and zooplankton, we used the time varied threshold (TVT) method at the frequency of 120 kHz. As a result, the mean nautical area scattering coefficient (NASC) of fish was highest at $913m^2/n.mile^2$ in June and lowest at $315m^2/n.mile^2$ in July. The mean NASC of zooplankton was highest at $247m^2/n.mile^2$ in May and lowest at $70m^2/n.mile^2$ in July. The mean NASC of fish and zooplankton showed a significant difference (P < 0.05) with high correlation ($R^2=0.84$). In addition, there was no significant difference in the mean NASC of fishes and zooplankton by depth (t-test, person correction = -0.17, p > 0.05).
Keywords
Acoustic; Timed varied threshold; Nautical area scattering coefficient;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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