Coordinating Working Party on Fishery Statistics (CWP)
Free text
Tags
Categories
Classifications and Metadata Standards
Concepts
Methodological standards
References
 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
Methodological standards #CWP standards#Catch and landings#Glossary#Product weight#Definitions#International standards
 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
Methodological standards #CWP standards#Catch and landings#Glossary#Landed weight#Definitions#International standards
  Nominal catch (also referred to as nominal landings): Landed weight converted to a live weight basis often by use of a conversion factor. Nominal catch is often referred to as the live weight equivalent of the landed weight or... More
Methodological standards #CWP standards#Catch and landings#Glossary#Nominal catch#Definitions#International standards#Statistical concepts
  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 catch... More
Methodological standards #CWP standards#Catch and landings#Glossary#Discarded catch#Definitions#International standards#Statistical concepts
  Bycatch: Component of the catch which represents non-targeted fish associated with the catch of the target species or group towards which fishing effort is directed, or other aquatic organisms taken incidentally during the course of fishing (e.g. birds, mammals,... More
Methodological standards #CWP standards#Catch and landings#Glossary#Bycatch#Definitions#International standards#Statistical concepts
 Non-reporting of nominal catch is a major concern in some fisheries. Further, many national statistical publications do not use the terms associated with catch and landings with the precise meanings as described in this section. In such publications, nominal catches... More
Methodological standards #Catch and landings#Practices and guidelines#Nominal catch
 Conversion factors depend primarily on the species of aquatic organism and its morphology. In addition there are a number of elements to consider: Extent and method of processing including on board fishing vessels Size of the fish, as... More
Methodological standards #Practices and guidelines
 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
Methodological standards #CWP standards#Data collection questionnaires#International standards
 Conversion factors introduce uncertainty in the estimation of the catch and this uncertainty can be considerable when converting highly processed products, e.g. filet weight to live weight equivalent. Caution is advised when studying the conversion factors used by the different... More
Methodological standards #Practices and guidelines
 Most economic statistics are collected using national currencies while much use of the international statistics requires that these data are on a comparable basis, e.g. in USD. Guidance on conversion from local currencies to a common standard is provided by... More
Methodological standards #Key economic variables and indicators#Practices and guidelines
1 2 3 4 5 6 7