PRELIMINARY CONSIDERATIONS CONCERNING FOOD DISPONIBILITIES AND FEEDING BEHAVIOUR OF REED PASERINES BY

Key words: reed paserine; diet; feeding behaviour The present study aimed at listing aquatic birdforms and their food as well as their behaviour concerning the use of trophic reserves in two periods of time: July 15 – 27, 2003- the reproduction period of warblers and September 11 – 13, 2003- the migration period at Iezar- Dorohoi (470 68’ N / 260 23 ’ E). The types of the Acrocephalus species bearing distinct ecological requirements used the same habitats for finding food. During the reproduction period, the challenge for gaining the food variety is to be noticed only among the specimens of the same species. During fall (migration), the challenge among the different types of warblers and the one among the specimens are very moderate. The seasonal dynamics and the daily dynamics of the reed arthropods are acutely significant in ensuring the food reserves for the Acrocephalus species and in decreasing the competition among them. Another element of great importance is represented by the weather conditions. It was observed that the activity performed by warblers and the competition for food is more intense after rain, wind and low temperatures