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

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. T...

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Bibliographic Details
Published in:Sustainability
Main Authors: Seok-Gwan Choi, Jinho Chae, Sangdeuk Chung, Wooseok Oh, Euna Yoon, Gunhee Sung, Kyounghoon Lee
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2020
Subjects:
Antarctic krill
acoustic survey
scientific echosounder
dB difference
biomass
Environmental effects of industries and plants
TD194-195
Renewable energy sources
TJ807-830
Environmental sciences
GE1-350
Antarctic
The Antarctic
Antarc*
Antarctic Krill
Online Access:https://doi.org/10.3390/su12145701
https://doaj.org/article/6923fc7468ab4a07b0319103f52a6270
Description
Summary: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%).

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