Yermokhin M. V. RussiaSaratovSaratov State University, 33 Astrakhanskaya Str., Saratov 410012, Russiaecoton@rambler.ru Author's articles STRUCTURAL DYNAMICS OF THE SPAWNING ANURAN TAXOCENOSES IN FLOODPLAIN LAKES OF THE MEDVEDITSA RIVER VALLEY (SARATOV REGION)