The period that provides the weights for an index is described as the base period.
The Basic Price is the amount receivable by the producer from the purchaser for a unit of a good or service produced as output minus any tax payable, and plus any subsidy receivable, on that unit as a consequence of its production or sale; it excludes any transport charges invoiced separately by the producer.
Dissolved oxygen required by organisms for the aerobic decomposition of organic matter present in water. This measurement is usually taken over 5 days.
Biological diversity means the variability among living organisms from various sources including terrestrial, marine and other aquatic ecosystems; this includes diversity at the genetic, species and ecosystem level. This difinition is adopted by the United Nations Convention on Biological Diversity.
Water containing salts at a concentration significantly lower than that of sea water. The concentration of total dissolved salts is usually in the range of 1,000 - 10,000 milligrams per litre (mg/l).
The C.i.f. Price (i.e. cost, insurance and freight price) is the price of a good delivered at the frontier of the importing country, or the price of a service delivered to a resident before the payment of any import duties or other taxes on imports or trade and transport margins within the country.
System of fish culture in an enclosure on whatever shape or size made of any screening material and attached to floating structures which are anchored to the sea-bed.