PRELIMINARY ASPECTS CONCERNING STRUCTURE ZOOPLANKTON IN THE BALTA MARE - CARJA 1 FISH FARM

Adina Popescu (Sirbu), M. Fetecau, I. Metaxa, A. Docan

Abstract
The present paper presents information on the structure and the dynamics of the water ecosystem's zooplankton of the Carja 1 fish farm - Vaslui county where they grow carps and Asian ciprinides as common fish. To establish the structure and the dynamics of the zooplankton, two samples where taken, (in the spring and in the autumn) from 6 stations with the help of a Garmin GPS 7- type navigation system. When analysing the number of individuals and the species present in the zooplankton's structure, one can notice the low development level of the animal zooplankton. From the quantity point of view, one can notice the numerical abundance of the rotifers in all the analysed samples. The small number of species and algae specimens determined in the zooplankton's structure emphasizes the reduced level of trophicity and biodiversity of the analysed ecosystem.

Key words: zooplankton, species, density, abundance and ecosystem