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۱Reproductive Biology and Breeding Success of the Common Babbler Turdoides caudatus in Khuzestan Province, Southwestern Iran
اطلاعات انتشار: Podoces، ششم،شماره۱، ۲۰۱۱، سال
تعداد صفحات: ۸
This study was carried out from 19 February until 1 June 2010. Reproductive activities of the Common Babbler Turdoides caudatus began on 10 March with observation of nest–building behavior and lasted to 1 June when the chicks fledged. Clutch size was 1–6 eggs (except 2 eggs), averaging 4.18 based on 38 nests studied. Brood size varied from 1 to 3 chicks. Group sizes observed were 7–11 individuals (average 8 individuals). The mean measurements of eggs (length, width and weight) were 23.52±0.99 mm, 17.25±0.55 mm, and 0.37±3.62 g, respectively. Breeding success was 27.7%. Brood size, clutch size and group size had no significant effect on breeding success. Mortality rate showed significant differences between the various stages (P0.001). Most of the mortality rate in the incubation stage (66.0%) occurred due to predation by snakes such as Echis carinatus and Platyceps rhodorachis. According to the Mann–Whitney U test, among all nest parameters, only the height of nest showed a significant difference with breeding success (P0.05).
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