International classifications and standardized data submission procedures have to be maintained in order to ensure that the collected statistics are comparable across countries so as to allow for summation and analyses at regional and global level. Fisheries statistics are usually obtained from national reporting offices and, wherever possible, verified from other sources. Estimates are produced when data are lacking or are considered unreliable. The statistics are stored in databases and disseminated through publications and electronic media. Aggregated data are also available through the FAO Internet site.
Since 1980, the Unit has been maintaining the following statistical data collections:
