NATURAL SCIENCES

Journal of fundamental
and
applied researches

The measure of lewel biodiversity of ichthyoplankton and zooplankton of water of Volga delta lowlands

2013. №2, pp. 35-44

Podolyako Stepan A.  - Research Associate, Astrakhan State Reserve, 119Embankment of the river Tsarev St., Astrakhan, 414021, Russian Federation, philopator@bk.ru

Shtepina Lyudmila A.  - Research Associate, Astrakhan State Technical University, 16Tatishchev St., Astrakhan, 414021, Russian Federation, shtepina.l@mail.ru

In this research was estimated level of zooplankton and ichthyoplankton communities biological diversity in major lower reach reservoirs of the Volga River delta in the Astrakhan State Reserve. The maximum value of ichthyoplankton biodiversity conforms to period of intense fry emigration to delta front of the Volga River. Changes in average monthly values of Shannon’s and Pielou’s indexes were higher in the east part of the lower reach. The mean monthly values of biological diversity indexes were higher in east part of kultuchnaya and island zones of delta than in west. In this part values of Shannon’s and Pielou’s indexes increased to the end of vegetative season, while in the eastern part they were down. It was note diversity indexes of zooplankton communities increase from lower reach to kultuchnaya zone and delta front, and the maximum community diversity was observed on floodplain water body. We estimated the role one to another zone to baby fish communities life cycle using values, obtained in different zones of the Volga River delta and separated areas with largest species diversity of zooplankton communities.

Key words: ichthyoplankton,biodiversity,zooplankton,pule of species,Astrakhan State Reserve,spawning site in floodplain