V. I. Kuksa* † and Yu. M. Gargopa**
* Water Problems Institute, Russian Academy of Sciences, ul. Gubkina 3, GSP-1, Moscow, 119991 Russia
** Murmansk Marine Biological Institute, Russian Academy of Sciences, Azov Branch,
prosp. Chekhova 41, Rostov-on-Don, 344006 Russia
Received December 4, 2002
Abstract—The main feature of the present-day hydrological conditions governing the formation of biological
production in the Sea of Azov is shown to be the appreciable freshening of seawater, which is due, first of all,
to climate changes. It is established that the freshening of seawater can benefit most for the reproduction of fish
resources in the Sea of Azov only if the river runoff withdrawals are reduced step by step down to 5 km3/year
(14%of the norm), the annual runoff is maintained at 35–36 km3, and the spring runoff is restored to 18.5 km3.
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