SELECTION OF OPTIMAL STRATEGIES FOR RESTORING SPECIES VARIABILITI AND FISH PRODUCTIVITY IN ABORIGINE ICHTHYOFAUNA OF THE STYR ? HORYN HIDROEKOLOGICAL CORIDIR

The method is used for finding optimal ways to rehabilitate natural water objects with minimum costs expenditure. Under present conditions the most effective is the minimum program: the and reservation of local fish restoring sites, the recreation of natural spawning and hibernation pockets, the arrangement of water protecting strips and their physical introduction into reality, the use of natural relief elements for restoring fish and post treatment of waste waters, the fight against poachers.