Coordinating Working Party on Fishery Statistics (CWP)
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Classifications and Metadata Standards
Methodological standards
 European Union Since 2000, an EU framework for the collection and management of fisheries data is in place. This framework was firstly reformed in 2008 resulting in the Data Collection Framework (DCF) and amended lately in 2016 and 2017 to further... More
 Fisheries statistics fall into three categories: documenting the removal of fish and other organisms, documenting the fishing effort and the fleets that exploit the resources and documenting the labour force, income, costs and invested capital that is used in this... More
 NOMINAL CATCH is most often not obtained as a direct measure but has to be derived and this is usually done by applying a conversion factor to the landed weight. More
 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
 Live weight: Total weight of fish when captured, estimated as if it was alive and prior to processing. More
 Retained catch: Estimated component of the catch which is retained on board during a fishing trip (refer to the catch concept diagram). An estimate of the retained catch is reported as total live weight of fish retained and in some... More
 Product weight: Weight of a fish product, often measured at-sea at the conclusion of processing. Information on product type, product homogeneity and conversion factors is also required in order to interpret product weight. As for landed weight, relevant when calculating... More
 Landed weight: Weight of a product at the time of landing, regardless of the state in which the product is landed. That is, the fish may be inter alia whole, gutted or filleted. Consequently, this measure is of limited use... More
  Nominal catch (also referred to as nominal landings): Landed weight converted to a live weight basis often by use of a conversion factor (refer Conversion Factors). Nominal catch is often referred to as the live weight equivalent of... More
  Discarded catch: Estimated component of the catch which is the total live weight of undersized, unsaleable or otherwise undesirable whole fish and other aquatic organisms which are discarded at the time of the capture or shortly afterwards (refer... More
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