This dataset lists the global catch (in metric tons,t) of tuna and tuna-like species from 1918-01-01 to 2019-12-31. This dataset was computed using public domain,annual nominal catch datasets (also called total catch) released by the five tuna Regional Fisheries Management Organizations (t-RFMOs):the Commission for the Conservation of Southern Bluefin Tuna (CCSBT),the Inter-American Tropical Tuna Commission (IATTC),the International Commission for the Conservation of Atlantic Tunas (ICCAT),the Indian Ocean Tuna Commission (IOTC) and the Western and Central Pacific Fisheries Commission (WCPFC). Species-specific catches are stratified by year,fishing gear,reporting / fishing fleet and area (essentially,the t-RFMOs competence areas apart from the CCSBT that has no defined area of competence and manages the global catch of southern bluefin tuna). “FIRMS level 0” identifies the processes applied to the primary datasets by the FIsheries and Resources Monitoring System (FIRMS)to generate the dataset.t-RFMO specific descriptions of the original input data sets can be found at the following links:- CCSBT:https://www.ccsbt.org/en/content/sbt-data - IATTC:https://www.iattc.org/PublicDomainData/IATTC-Catch-by-species1.htm - ICCAT:https://www.iccat.int/en/accesingdb.html - IOTC:https://iotc.org/data/datasets/latest/NC - WCPFC:https://www.wcpfc.int/public-domain The processes applied to produce this FIRMS level 0 dataset at global scale consist of a series of steps:Merging of the primary nominal catch datasets released by the 5 tuna RFMOs,that might also include dead discards (e.g.,ICCAT and IATTC)Removal of all Southern Bluefin Tuna data provided by t-RFMOs other than the Commission for the Conservation of Southern Bluefin Tuna (CCSBT),which is considered the only authoritative source of information for the speciesMapping of the original code lists (t-RFMO specific) to standard FAO / CWP code lists (e.g.,for gears and species) or to ad-hoc classifications as in the case of reporting / fishing fleets. These mappings have been done in collaboration with the t-RFMOs Secretariats and might be subject to future revisionsMore details on the processes are provided in the lineage section.