Why is the Caspian Sea important for sturgeon and caviar production?

The Caspian Sea is historically significant for sturgeon and caviar production because it has long accounted for the vast majority of the world's sturgeon catch. Several valuable species of sturgeon, including the beluga, osetrova, and sevruga, inhabit the sea and migrate into inflowing rivers to spawn.1234

The sea’s importance is defined by:

• Commercial Value: The eggs (roe) of these sturgeon are processed into caviar, a highly prized food product. The industry is primarily centered in Russia and Iran, which border the sea.31564
• Ecological Role: The Caspian provides a critical habitat for these anadromous fish, which rely on the sea and its connected river systems for their life cycle.74

However, the sturgeon population has faced severe declines due to overfishing, habitat alteration from dam construction, and pollution. In response, the industry has increasingly turned to aquaculture and artificial breeding to sustain production while attempting to protect the remaining wild populations.714