SG-ASAM-09 | Reuniones

Subgrupo sobre Prospecciones Acústicas y Métodos de Análisis

Lugar:

Ancona, Italia

Fecha y hora del inicio de la reunión:

lunes, 25 mayo 2009

Fecha y hora del fin de la reunión:

jueves, 28 mayo 2009

Plazo de presentación

lunes, 11 mayo, 2009 - 00:00 Australia/Hobart (Documento de grupo de trabajo)

Informe de la reunión:

s-sc-xxviii-a8.pdf (311.9 KB)

Documentos de reunión

Documentos

Número de documento	Nombre	Punto(s) de la agenda
SG-ASAM-09/01 Mostrar menos información	Agenda for the Subgroup on Acoustic Survey and Analysis Methods Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión
SG-ASAM-09/02 Mostrar menos información	List of participants Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión
SG-ASAM-09/03 Mostrar menos información	List of participants Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión
SG-ASAM-09/04 Mostrar menos información	Net-based verification of acoustic techniques used to identify Antarctic krill J. Watkins and S. Fielding (United Kingdom) Resumen: Acoustic target classification protocols recently adopted by utilising the Stochastic Distorted Wave Approximation (SDWBA) krill target strength model, are assessed. Three frequency acoustic data and concurrent net information, from 16 net hauls through krill aggregations, were collected during two cruises to the South Georgia region in 1996. For each net-sampled aggregation the differences Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2.2
SG-ASAM-09/05 Mostrar menos información	Preliminary acoustic results from the New Zealand IPY-CAML survey of the Ross Sea region in February-March 2008 R. O’Driscoll, G. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet (New Zealand) Resumen: During February and March 2008 New Zealand carried out a major research voyage into the Ross Sea region in support of the International Polar Year Census of Antarctic Marine Life (IPY-CAML). The 50 day voyage on the research vessel Tangaroa involved an extensive survey of marine organisms from viruses to pelagic and demersal fish and cephalopods in depths from the surface down to 3500 m, and Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	5
SG-ASAM-09/06 Mostrar menos información	Target strength of mackerel icefish (Champsocephalus gunnari) from a scattering model G. Macaulay (New Zealand) Resumen: An anatomically detailed acoustic scattering model has been used to estimate the backscattered target strength (TS) of six mackerel icefish (Champsocephalus gunnari) of total length 26.8–35.0 cm, at 38 kHz. The model used computed tomography (CT) scans of fish to determine the sound speed and density throughout the fish and simulated the complex interaction of the incident sound wave with the Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	6
SG-ASAM-09/07 Mostrar menos información	ANALYSIS OF ICE-FISH (CHAMPSOCEPHALUS GUNNARI) SPATIAL DISTRIBUTION FOR OPTIMIZATION OF THE BOTTOM TRAWL SURVEY SAMPLING S. Kasatkina (Russia) Resumen: The spatial distribution characteristics of ice-fish in the near-bottom layer are analyzed using the acoustic data obtained in the South Georgia area during the Russian bottom trawl surveys 2002. Acoustic and trawl density samples obtained in the near-bottom layer covered by trawl survey are compared. It is shown the possibility to estimate the bottom trawl efficiency. The high heterogeneity Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	7
SG-ASAM-09/08 Mostrar menos información	ACOUSTIC IDENTIFICATION AND SIZE ESTIMATION OF EUPHAUSIIDS R. Korneliussen and G. Skaret (Norway) Resumen: Fishery for krill is a major economical activity in the Antarctic Ocean. The increased Norwegian fishery inherently gives Norway a responsibility to contribute to the management of the marine resources in the southern ocean. During the International Polar Year 2008, RV “G.O. Sars” spent 3 months in the Antarctic Ocean to do investigations on euphausiids and other key components of the Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2
SG-ASAM-09/09 Mostrar menos información	UNDERWATER ACOUSTIC INSTRUMENTATION FOR ANTARCTIC APPLICATIONS L. Andersen (Norway) Resumen: In order to describe an aquatic ecosystem scientists require a variety of information. Some of this information can be obtained using underwater acoustics. As examples acoustics is often used to provide information about biomass densities, biological species compositions, size distributions, behavior in space and time, and links to other environmental information such as habitats. Examples of Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	4
SG-ASAM-09/10 Mostrar menos información	TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy) Resumen: Target strength (TS) determinations can be classified into several types: 1) theoretical, 2) ex situ measures on dead or living fish under experimental conditions, 3) in situ measures on free swimming fish in their natural habitat. A canvassing of the literature suggested that the type of study may influence the result. For example, some authors suggested that freezing the fish reduce the over Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	6
SG-ASAM-09/11 Mostrar menos información	SUMMARY OF ACOUSTIC DATA AND RELATED DATA COLLECTED DURING IPY SURVEYS Secretariat Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	5
SG-ASAM-09/12 Mostrar menos información	TOWARDS A CCAMLR PROTOCOL FOR THE ESTIMATION OF KRILL BIOMASS T. Jarvis (Australia) and K. Reid (Secretariat) Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2
SG-ASAM-09/13 Mostrar menos información	APPLYING A TS-PROBE FOR MEASURING ANTARCTIC KRILL (EUPHAUSIA SUPERBA) TARGET STRENGTH IN SITU: PROCEDURES AND DATA ANALYSIS G. Skaret, L. Calise and E. Ona (Norway) Resumen: A submersible multifrequency acoustic TS-probe was used for measuring the target strength of Antarctic krill in situ at short range. The experimental methods, procedure for data retrieval and analysis with some results for one selected station are presented. A Simrad EK60 split beam system operating at 38, 120 and 200 kHz is installed in the probe, connected to three pressure resistant Read More Presentado por: Admin Admin (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2.1

Agenda

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1 Introduction

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1.1 Opening of meeting

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1.2 Meeting terms of reference and adoption of the agenda

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2 Provide advice that will assist in quantifying uncertainties in krill B0 estimates

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SG-ASAM-09/08	ACOUSTIC IDENTIFICATION AND SIZE ESTIMATION OF EUPHAUSIIDS R. Korneliussen and G. Skaret (Norway)
SG-ASAM-09/12	TOWARDS A CCAMLR PROTOCOL FOR THE ESTIMATION OF KRILL BIOMASS T. Jarvis (Australia) and K. Reid (Secretariat)

2.2 Collate a set of net-validated acoustic data and evaluate whether current acoustic target identification methods are biased

Documentos

SG-ASAM-09/04

Net-based verification of acoustic techniques used to identify Antarctic krill
J. Watkins and S. Fielding (United Kingdom)

2.3 Provide direction towards developing a probability density function for the estimate of B0 based on the current understanding of uncertainties in various parameter values.

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2.1 Review recent research results including developments in target strength modelling and observations on krill orientation and material properties

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SG-ASAM-09/13

APPLYING A TS-PROBE FOR MEASURING ANTARCTIC KRILL (EUPHAUSIA SUPERBA) TARGET STRENGTH IN SITU: PROCEDURES AND DATA ANALYSIS
G. Skaret, L. Calise and E. Ona (Norway)

3 Document the current agreed protocols for krill B0 assessment

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4 Discuss the use of ancillary acoustic data (e.g. from finfish surveys, exploratory fisheries data and commercial fisheries echo sounders)

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SG-ASAM-09/09

UNDERWATER ACOUSTIC INSTRUMENTATION FOR ANTARCTIC APPLICATIONS
L. Andersen (Norway)

4.2 Document protocols for analysing, processing, and interpreting ancillary acoustic data (e.g., data collected during exploratory fisheries)

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4.3 Determine whether such data can provide krill biomass estimates from areas that are not regularly surveyed

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4.4 Discuss future needs for acoustic instrumentation in the Antarctic

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4.1 Review recent research results involving collection of ancillary acoustic data

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5 Evaluate results from IPY surveys in 2008

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SG-ASAM-09/05	Preliminary acoustic results from the New Zealand IPY-CAML survey of the Ross Sea region in February-March 2008 R. O’Driscoll, G. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet (New Zealand)
SG-ASAM-09/11	SUMMARY OF ACOUSTIC DATA AND RELATED DATA COLLECTED DURING IPY SURVEYS Secretariat

5.2 Presentation of new results from IPY surveys

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5.3 Determine whether data can provide krill biomass estimates from areas that are not regularly surveyed

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6 Evaluate developments in target strength modelling and other new observations on Antarctic fish species

Documentos

SG-ASAM-09/06	Target strength of mackerel icefish (Champsocephalus gunnari) from a scattering model G. Macaulay (New Zealand)
SG-ASAM-09/10	TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy)

6.1 Presentation of new results

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7 Attempt to resolve difficulties identified with the swept-area estimation of icefish abundance

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SG-ASAM-09/07

ANALYSIS OF ICE-FISH (CHAMPSOCEPHALUS GUNNARI) SPATIAL DISTRIBUTION FOR OPTIMIZATION OF THE BOTTOM TRAWL SURVEY SAMPLING
S. Kasatkina (Russia)

7.1 Discuss appropriate application of the adjustment factor for trawl headline height used in surveys for C. gunnari

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8 Suggestions for timing/venue of next meeting

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9 Recommendations to Scientific Committee

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10 Adoption of Report

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11 Close of Meeting

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5.1 Review acoustic data and related metadata submitted to CCAMLR

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Documentos

SG-ASAM-09/01	Agenda for the Subgroup on Acoustic Survey and Analysis Methods
SG-ASAM-09/02	List of participants
SG-ASAM-09/03	List of participants