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 inSustainability Vol. 12; no. 14; p. 5701
Main Authors Choi, Seok-Gwan, Chae, Jinho, Chung, Sangdeuk, Oh, Wooseok, Yoon, Euna, Sung, Gunhee, Lee, Kyounghoon
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2020
Subjects
Acoustic surveying
Acoustics
Collaboration
Commercial fishing
Crustaceans
Euphausiacea
Food chains
Islands
Krill
Methods
Noise
Polar environments
Population density
Software
Orkney Islands
South Shetland Islands
United Kingdom > UK
South Georgia
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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 SV120-38 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%).
ISSN:2071-1050
2071-1050
DOI:10.3390/su12145701