Biological productivity of the "Central-Caspian" license zone water area
The research shows that «Central-Caspian» license zone lies in the middle between highly productive littoral and lowly productive pelagial of the Caspian Sea in its level of biological productivity. Within the period of research (2007—2012) «Central-Caspian» license zone remained a fish nursery ground not only for sea fishes, but also for migratory and semi-anadromous fish species and the Caspian seal. The research materials are recommended to be used for ecological substantiation of the planned oil and gas production operations, determination of damage to water biological resources in the course of investment projects and elaboration of specific water protection and fish protection activities.