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Coordinating Working Party on Fishery Statistics (CWP)
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Classifications and Metadata Standards
Methodological standards
 Note A new section to address the aquaculture statistics is being prepared by the CWP Aquaculture Subject Group. The final version shall be approved by upcoming CWP Session (CWP 26th Session to be held early in 2019) for posterior publication. For... 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
 The overall aim for statistics on catch and landings is to report on fisheries contribution to the national economy, to the provision of food (subsistence) and on the total removal of fish and shellfish from the sea. Catch Statistics are... More
 Catch and landing statistics are for many purposes required as very detailed data e.g. broken down by fleet, gear, season and detailed area. The nationality of landings follows the vessel flag state principle as described in Nationality of Catch and... More
 The concept "NOMINAL CATCHES" refers to the landings converted to a live weight basis. In fact it is often referred to as the "Live weight equivalent of the landings" or shortened to the "LIVE WEIGHT". In national publications the same... More
 Care should be taken when referring to the NOMINAL CATCH (the live weight equivalent of the landings) as the CATCH, since in many situations the initial catch (the GROSS CATCH) has been reduced by a number of factors. These factors... More
 The concept "LANDED WEIGHT" refers to the mass (or weight) of a product at the time of landing, regardless of the state in which is landed. That is, the fish may be whole, or gutted or filleted. Consequently this unit... More
 The concept "PRODUCT WEIGHT" is the weight of a product at the time of weighing. Thus it does not describe the presentation of the product and, unless it is known that the product is homogenous in form, further analysis has... 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
 Discards are fish and organisms that are returned to the sea during sorting the catch on board. The reasons for discarding are many including lack of market opportunities, damaged fish, fish with wounds or cuts or infected by parasites, undersized... More
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