SG-ASAM-17

Subgroup on Acoustic Survey and Analysis Methods

Location:

Qingdao, People's Republic of China

Meeting Start Date/Time:

Monday, 15 May 2017

Meeting End Date/Time:

Friday, 19 May 2017

Submissions Due

Monday, 1 May 2017 - 00:00 Australia/Hobart (Working Group Paper)

Meeting Report:

e-sc-xxxvi-a04.pdf (1014.16 KB)

Meeting Documents

Documents

Document Number	Title	Agenda Item(s)
SG-ASAM-17/01 More Info	An outline of the proposed dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru H. Murase, K. Abe, T. Ichii and A. Kawabata Abstract: A dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season is planned by Japan. No krill biomass has been estimated in the Division since 1996 when Australia carried out BROKE. There are two main objectives of our survey: (1) estimation of krill biomass to update B(0) in the area and (2) oceanographic observations in the area to detect long term changes if any. Japanese research Read More Submitted By: Dr Hiroto Murase (Japan) Approved By: Dr Taro Ichii Request Meeting Document	5
SG-ASAM-17/02 More Info	Describing krill: swarms or integration intervals? M.J. Cox Abstract: CCAMLR anticipates that acoustic data collected from krill fishing vessels will be incorporated into krill feed back management. Acoustic data collected from fishing vessels may have different characteristics to data collected from research ships. For example, acoustic data collected from fishing vessels may contain seabed aliased echoes and instrument cross-talk. Analysing Read More Submitted By: Dr Martin Cox Approved By: Dr Dirk Welsford (Australia) Request Meeting Document	2
SG-ASAM-17/03 More Info	Evaluation of some processing techniques applied to acoustic recordings from two krill fishing vessels X. Wang, G. Skaret and O.R. Godø Abstract: Acoustic data from krill fishing vessels have the potential to provide useful contributions to assess local krill abundance and distribution, and even as input to the CCAMLR feedback management system under development. The possibility to collect such data from the fleet has been demonstrated through a CCAMLR proof of concept, but processing is in most cases essential before any use of the Read More Submitted By: Dr Xinliang Wang Approved By: Dr Xianyong Zhao (China) Request Meeting Document	2, 3
SG-ASAM-17/04 More Info	Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method S.-G. Choi, K. Lee and D. An Abstract: The dB-difference and characteristics of krill aggregation inhabiting Subarea 48.1, which includes the Elephant Island peripheries and the west and south of the South Shetland Islands, were estimated to distinguish Antarctic krill, using acoustics. From April 13 to 24, 2016, acoustic data were collected along 24 survey lines using the frequencies 38 and 120 kHz, and midwater trawling was Read More Submitted By: Dr Seok-Gwan Choi (Korea, Republic of) Approved By: Dr Seok-Gwan Choi (Korea, Republic of) Request Meeting Document	3
SG-ASAM-17/P01 More Info	A study on calibration for commercial echosounder using bottom backscattering strength in Antarctic S.-G. Choi, H. Lee, K. Lee and J. Lee Abstract: In this study, we calibrated a commercial echosounder (ES70) installed on a krill fishing vessel to use it in estimating biomass of Antarctic krill (Euphausia superba). The method of calibration was to analyze the difference between the bottom backscattering strength of the commercial echosounder (i.e. ES70) and the scientific echosounder (i.e. EK60) at some transects designated by Read More Submitted By: Dr Seok-Gwan Choi (Korea, Republic of) Approved By: Dr Seok-Gwan Choi (Korea, Republic of) Publication: Fisheries Technology in Korea Request Meeting Document	2

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Agenda

Preliminary Agenda

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1 Opening of the meeting

Annotations

The Con-conveners will welcome participants, outline priorities for the meeting and provide an overview of local facilities, including Secretariat support, Internet access and extracurricular activities.

Documents

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2 Protocols for the collection and analysis of krill acoustic data from fishing vessels, with emphasis on Simrad echosounders (EK60, ES60/70)

Annotations

SG-ASAM will review automated methods for processing acoustic data collected on krill fishing vessels according to the established CCAMLR Protocols as outlined in the SG-ASAM-16 Report (163.47 KB).

Documents

SG-ASAM-17/02	Describing krill: swarms or integration intervals? M.J. Cox
SG-ASAM-17/03	Evaluation of some processing techniques applied to acoustic recordings from two krill fishing vessels X. Wang, G. Skaret and O.R. Godø
SG-ASAM-17/P01	A study on calibration for commercial echosounder using bottom backscattering strength in Antarctic S.-G. Choi, H. Lee, K. Lee and J. Lee

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3 Analysis of data collected from fishing vessels

Annotations

SG-ASAM will review data collected by krill fishing vessels during 2015/16 and 2016/17 with particular emphasis on

occupation of repeat transects
fishing-vessel-based regional surveys
data collection during fishing operations.

Documents

SG-ASAM-17/03	Evaluation of some processing techniques applied to acoustic recordings from two krill fishing vessels X. Wang, G. Skaret and O.R. Godø
SG-ASAM-17/04	Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method S.-G. Choi, K. Lee and D. An

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4 Survey design

Annotations

Review of survey and sampling design for future surveys and for acoustic data collected during fishing operations.

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5 Other business

Annotations

SG-ASAM will review other relevant issues, including, but not limited to, proposals for surveys of krill undertaken on research vessels, further development on previous topics, etc.

Documents

SG-ASAM-17/01

An outline of the proposed dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru
H. Murase, K. Abe, T. Ichii and A. Kawabata

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6 Advice to the Scientific Committee

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7 Adoption of report and close of meeting.

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