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
Main Authors: Seok-Gwan Choi, Jinho Chae, Sangdeuk Chung, Wooseok Oh, Euna Yoon, Gunhee Sung, Kyounghoon Lee
Format: Article in Journal/Newspaper
Language:unknown
Subjects:
Antarctic
The Antarctic
Antarc*
Antarctic Krill
Online Access:https://www.mdpi.com/2071-1050/12/14/5701/pdf
https://www.mdpi.com/2071-1050/12/14/5701/
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%). Antarctic krill; acoustic survey; scientific echosounder; dB difference; biomass

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