WS-CF-2022

Workshop on Conversion Factors for Toothfish 2022

Lugar:

En línea

Fecha y hora del inicio de la reunión:

martes, 12 abril 2022

Fecha y hora del fin de la reunión:

Miércoles, 13 abril 2022

Plazo de presentación

martes, 29 Marzo, 2022 - 00:00 Australia/Hobart (Documento de grupo de trabajo)

WS-CF-2022 Schedule

Informe de la reunión:

e-ws-cf-2022-prelim-v1.pdf (429.54 KB)

Documentos de reunión

Documentos

Número de documento	Nombre	Punto(s) de la agenda
WG-FSA-15/77 Mostrar menos información	Conversion Factors used for Patagonian toothfish in Division 58.5.1. and Subarea 58.6 N. Gasco (France) Resumen: Conversion Factor is a crucial value used to calculate green weight using product weight and thus assess the amount of fish withdrawn from the stock. This paper describes factors influencing conversion factor using data collected on Patagonian toothfish within the French EEZ, results emphasise the need to calculate CF with a sub-sample of the catch that is representative of the total catch in Read More Presentado por: Mr Nicolas Gasco (Francia) Solicitar acceso a documento de reunión	2
WG-FSA-2021/03 Mostrar menos información	Results from the Conversion Factor Survey conducted by the Secretariat in 2020, from Members’ vessels participating in CCAMLR toothfish fisheries CCAMLR Secretariat Resumen: Results from the 2020 Conversion Factor Survey of Members’ vessels participating in CCAMLR toothfish fisheries, undertaken by the CCAMLR Secretariat, are presented in this paper. All Members reported that their vessels utilized the headed, gutted and tailed processing method, however no other product type was uniformly produced by Members or vessels. The provision of Conversion Factors by Read More Presentado por: Mr Isaac Forster (Secretaría de la CCRVMA) Aprobado por: Dr David Agnew (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2
WS-CF-2022/01 Mostrar menos información	A review of toothfish conversion factor data submitted by vessels and scientific observers, and implications for estimation of total catch CCAMLR Secretariat Resumen: Conversion factors are an essential parameter used in estimating landed greenweight from the processed product weight of fish on a vessel. Comparisons of observer- and vessel- reported conversion factors for toothfish using the most common processing type by fishery area from 2016 through 2021 showed that observer reported values were more variable and typically higher than vessel reported Read More Presentado por: Mr Isaac Forster (Secretaría de la CCRVMA) Aprobado por: Dr David Agnew (Secretaría de la CCRVMA) Solicitar acceso a documento de reunión	2
WS-CF-2022/02 Mostrar menos información	Sampling, calculation and use of conversion factors by New Zealand N.A. Walker, J. Fenaughty, A. Berry, M. Messina and A. Burgess Resumen: This paper summarises the sampling procedures, methods for calculations and the vessel use of conversion factors used by New Zealand for its vessels operating in CCAMLR. Instructions issued to observers going onboard the New Zealand vessels describe the sampling procedures for informing the calculation of conversion factors. Typically, a four-year rolling average is used to issue vessel Read More Presentado por: Mr Nathan Walker (Nueva Zelandia) Aprobado por: Mr Nathan Walker (Nueva Zelandia) Solicitar acceso a documento de reunión	2, 3
WS-CF-2022/03 Mostrar menos información	Variables that drive conversion factors and how to improve their accuracy N. Gasco Resumen: This document describes the different variables influencing conversion factor values and opens discussions on how to take those into account. Presentado por: Mr Nicolas Gasco (Francia) Aprobado por: Dr Marc Eléaume (Francia) Solicitar acceso a documento de reunión	2.2
WS-CF-2022/04 Mostrar menos información	Analysis of Conversion factor data from longliner vessels in CCAMLR Subarea 48.3 J. Moir Clark, J. Chapman and R. Stacy Resumen: Conversion factors used in the toothfish fishery may vary due to several variables, specifically the weighing and processing method, cut-type, vessel, size of fish and time of year. Using data collected from vessels operating in Subarea 48.3 between 2011 and 2021, this paper attempts to briefly look at the variation in the conversion factor, if any, caused by some of these variables. While it Read More Presentado por: Mr James Clark (Noruega) Aprobado por: Dr Chris Darby (Reino Unido) Solicitar acceso a documento de reunión	2

Agenda

Agenda preliminar

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1 Welcome

Documentos

2 Review

Documentos

WG-FSA-15/77	Conversion Factors used for Patagonian toothfish in Division 58.5.1. and Subarea 58.6 N. Gasco (France)
WG-FSA-2021/03	Results from the Conversion Factor Survey conducted by the Secretariat in 2020, from Members’ vessels participating in CCAMLR toothfish fisheries CCAMLR Secretariat
WS-CF-2022/01	A review of toothfish conversion factor data submitted by vessels and scientific observers, and implications for estimation of total catch CCAMLR Secretariat
WS-CF-2022/02	Sampling, calculation and use of conversion factors by New Zealand N.A. Walker, J. Fenaughty, A. Berry, M. Messina and A. Burgess
WS-CF-2022/04	Analysis of Conversion factor data from longliner vessels in CCAMLR Subarea 48.3 J. Moir Clark, J. Chapman and R. Stacy

2.1 Current on-board sampling procedures

Documentos

2.2 Conversion factor calculation methodology

Documentos

WS-CF-2022/03

Variables that drive conversion factors and how to improve their accuracy
N. Gasco

2.3 Conversion factor implementation

Documentos

2.4 Effect of variability on total catch removals

Documentos

3 Develop draft guidelines

Documentos

WS-CF-2022/02

Sampling, calculation and use of conversion factors by New Zealand
N.A. Walker, J. Fenaughty, A. Berry, M. Messina and A. Burgess

3.1 On board sampling

Documentos

3.2 Calculation

Documentos

3.3 Use of conversion factors

Documentos

4 Nest steps

Documentos