WG-FSA-15/77
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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Factor is a crucial value used to calculate green weight using product weight and thus assess the amount of fish withdrawn from the stock.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
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2 |
WG-FSA-2021/03
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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)
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2 |
WS-CF-2022/01
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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)
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2 |
WS-CF-2022/02
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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)
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2, 3 |
WS-CF-2022/03
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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
Aprobado por:
Dr Marc Eléaume (Francia)
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2.2 |
WS-CF-2022/04
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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
Aprobado por:
Dr Chris Darby
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2 |
