Valerica Gâlcă

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RESEARCH CONCERNIG THE IDENTIFICATION AND SPREAD OF AQUATIC MACROPHYTES FROM TWO FRESHWATER FISH TANKS

Valerica Gâlcă, I. Gâlcă, Lăcrămioara Bălăşcau

Abstract
Water tanks, regardless of the nature and dimensions, including two biotypes: water mass (pelagialul) and substrate (bentalul). Water mass is populated by animal and vegetable organisms, which together form pelagosul. During the period 1 June to 15 July 2010 were carried out research activities to identification and quantitative determination of aquatic vegetation present in two freshwater pools (A and B), each basin with an area of 1500 m2. The research was conducted at the Research Station of Aquaculture and Aquatic Ecology over a period of 45 days and has identified an emersion submersion and floating vegetation. Aquatic macrophytes were analyzed using the Identification Manual by specific vegetation area, looking at the stem, leaves, inflorescence and whole plant. The plants identified were harvested and arranged on associations to be incorporated systematically, then he determined their biomass.
In the studied water basins was identified emersion submersion and floating aquatic vegetation. Thus, we determined 29 taxons belonging to 12 families of emersion, submersion and floating aquatic macrophytes. Following measurements done an excess of emersion aquatic vegetation (Phragmites communis), whose development can be prevented effectively by stocking ponds with herbivorous fish (Ctenopharyngodon idella).

Key words: plants, basin, macrophytes, aquatic