Density Estimation of Antarctic Krill in the South Shetland Island (Subarea 48.1) Using dB-Difference Method

Seok-Gwan Choi, Jinho Chae, Sangdeuk Chung, Wooseok Oh, Euna Yoon, Gunhee Sung and Kyounghoon Lee
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Seok-Gwan Choi: Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science, Busan 46083, Korea
Jinho Chae: Marine Environmental Research & Information Laboratory, Gunpo 15850, Korea
Sangdeuk Chung: Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science, Busan 46083, Korea
Wooseok Oh: Division of Fisheries Science, Chonnam National University, Yeosu 59626, Korea
Euna Yoon: Fisheries Resources Research Center, National Institute of Fisheries Science, Tongyeong 53064, Korea
Gunhee Sung: Marine Environmental Research & Information Laboratory, Gunpo 15850, Korea
Kyounghoon Lee: Division of Fisheries Science, Chonnam National University, Yeosu 59626, Korea

Sustainability, 2020, vol. 12, issue 14, 1-14

Abstract: This study is aimed to estimate the density of Antarctic krill that inhabit in the area around South Shetland Island by using a dB-difference method. An acoustic survey was conducted from 13 to 24 April in 2016 in the sea of South Shetland. Acoustic data on frequency 38 and 120 kHz were collected. The Antarctic krill echo was extracted for the S V120-38 kHz range of 0.4–14.3 dB, which was obtained by applying the size of the collected Antarctic krill in this study (25–60 mm). The mean Antarctic krill density across the survey area was 33.65 g m −2 (CV = 45.97%).

Keywords: Antarctic krill; acoustic survey; scientific echosounder; dB difference; biomass (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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