In accordance with the internationally recommended practice, import statistics include fish caught by foreign fishing craft, whether or not processed on board, landed in domestic ports; export statistics include fish caught by domestic fishing craft, whether or not processed on board, landed in foreign ports.
Two systems of recording trade are in common use, differing mainly in the way warehoused and re-exported goods are recorded: special trade and general trade.
is a system of recording imports for domestic consumption on the one hand and exports of domestic goods on the other.
include goods for domestic consumption and withdrawals from bonded warehouses or free zones for purposes of domestic consumption.
comprise exports of goods wholly or partially produced or manufactured in the country, together with exports of 'nationalized goods', but not of goods held in bonded warehouses or free zones.
is a system which records total imports and total exports including re-exports.
consist of all imports into a country, including goods for domestic consumption and imports into bonded warehouses or free zones.
consist of the combined total of national exports and re-exports. Re-exports, in the general trade system, consist of the outward movement of nationalized goods plus goods that, after importation, move outward from bonded warehouses or free zones without having been transformed.
Export and import data in the Commodities production and trade database relate to general trade for all countries except nearly half, which report on the basis of special trade
There are many different sources for foreign trade statistics. Data in the time series may have been obtained by more than one of the following sources:
Complete coverage of commodities' trade
数据收集方法: Import and trade statistics are obtained primarily from country reports provided to FAO in published form or on computer tapes. About 100 countries including the major fish trading nations, provide data on magnetic tapes.
数据处理方法: Whenever the data received on tapes from FAO/ESS are incomplete as to coverage these are integrated with other statistics received in printed form (for example, landings abroad).
When no official statistics are submitted by a country, and no alternative source is available, the commodity quantity and value is estimated generally on the basis of mirror statistics of major trading partners.
Consistent and Accurate
To facilitate the reporting of consistent and accurate world commodities' trade FAO/FIPS provides internationally agreed definitions for the statistical treatment of transhipment and fish landings abroad in the international trade.
Fishing vessel production
can be landed and sold at foreign ports or off-loaded onto a foreign country vessel in international waters and thus sold to a foreign country. In both cases, according to definitions used to compile fishery statistics, these are considered respectively as exports and imports.
数据核准机制: Comparison with Catch Statistics, after application of appropriate factor to convert product to live weight.
Quantities of preserved and processed fishery commodities by country and by commodity, produced both ashore and on-board vessels utilising catches from commercial fisheries and aquaculture production
The data cover the quantities of preserved and processed fishery commodities produced from:nominal catches of all aquatic animals (except the catches of all aquatic mammals and the production of all aquatic plants) taken for commercial, industrial and subsistence purposes, by all types of fishing units operating in freshwater and marine areas;fish farming, shellfish culture, etc.;imported raw materials.
Statistics include species from which the commodity is produced, the commodity from (whole, filleted, shucked, etc.) and form of preservation (fresh, frozen, canned, cured, meal, etc.). They do not include turtles, frogs and crocodiles. Products such as costume jewellery and fish leather are also excluded.
The statistics include the output of processed commodities, produced on board factoryships and by fishermen's families as domestic activities, e.g. drying, salting, smoking, etc.
The statistics include also the preserved and processed fishery commodities produced on board domestic fish factoryships and fishing craft from the reporting country or area, even when landed directly in foreign ports. However, data do not include fishery commodities produced on board foreign fish factoryships or fishing craft and landed directly in domestic ports.
Production data for "Fish, live, fresh or chilled", "Live crustaceans", "Live molluscs", "Fresh unpeeled crustaceans" and "Fresh unshucked molluscs" are not included in the database, as these items cannot be considered to be either preserved or processed products.
Production statistics are received from national reporting authorities
数据收集方法: National tailored questionnaire on production of processed and preserved fishery commodities (FISHSTAT FC1) sent annually by FAO/FIPS
数据处理方法: The missing production data are estimated by using a mixed technique, consisting of analysing trend of catch of relevant species, the information received from the FIPS questionnaire on disposition of catch (FISHSTAT DNC) through the application of appropriate technical input/output factors, from other published material (yearbooks in particular, commodity reviews and other intelligence). Often, exports are used as an estimate, thought in such way the commodities supplying the domestic market are omitted