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Coordinating Working Party on Fishery Statistics (CWP)
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 Logbooks provide estimates of the catch at sea and for many industrialised fisheries logbook information is available and may be used for a direct estimate of the catch. However, the accuracy of measures recorded on fishing log-sheets depends on available... More
  Synoptical list of Yearbooks List of yearbooks of fishery statistics Catch Concepts - Diagrammatic Presentation (former Annex B1) More
Category: Concepts
 Confidentiality of certain data or data types may be required to protect personal and commercial interests. However, a confidentiality claim is justified only if there is a risk to reveal data that can be referred to individuals or to legal... More
 Microdata refer to data items that directly refer to individuals or legal entities. Aggregated data may present a risk for revealing the origin of the data but this risk is less than for microdata. More
 An analysis of how well founded a confidentiality claim is, is based on the key characteristics of the data, use of the data and what disclosure risks need to be protected against. Among the key characteristics of the data particular... More
 Anco Hundepol et al. (2010). Confidentiality UNECE (2007). Managing statistical confidentiality and microdata access - Principles and guidelines More
 In fishery and aquaculture statistics the term "conversion factor" is used principally when converting the volume or weight of a product at one stage in the production chain to its volume or weight at another stage in the chain. Perhaps... More
 Conversion factors depend primarily on the species and its morphology. In addition there are a number of elements to consider: Extent and method of processing on board the fishing vessels. Size of the fish As a... More
 FAO maintains records of the conversion factors used by the national authorities through a questionnaire, FISHSTAT CF1, on which the national authorities are requested to indicate the appropriate conversion factors. This is not an annual questionnaire but is distributed on... More
 Conversion factors introduce uncertainty in the estimation of the catch and this uncertainty can be considerable when converting highly processed products, e.g. fillets to 'live fresh weight' equivalent. Caution is advised when studying the conversion factors used by the different... More