Interannual dynamics of oomorphological parameters and clutch size of Great Bustard in agricultural landscapes of the Saratov part of Trans-Volga area. - T.A. Pereverzina, V.G. Tabachishin, I.A. Khrustov. - Berkut. 18 (1-2). 2009. - P. 49-53.
Analysis is based on field surveys carried out in the left-Volga-bank part of the Saratov region in 2004–2008 and study of the Zoological museum of Saratov State University. Full clutches of the Bustard had as a rule 1–2 eggs, rarelier 3. The mean clutch size is 1,8 ± 0,06 (n = 99). This value remains stable. The largest and massive eggs with an ellipsoid, short- or elongated-ellipsoid shape are characteristic for three-egg clutches. Apparently, they are produced by females in an optimum reproductive age. [Russian].
Key words: Great Bustard, Otis tarda, Saratov region, egg, clutch.
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