Abstract
We studied prenatal and postnatal growth rates and maternal effects in fallow deer (Dama dama) populations in free-ranging habitats in the Carpathian Basin. Data in this five-year long study were collected from pregnant females from December to the end of the hunting season (February), from newborns (May-June) and from 4–12 months-old fawns (October-June) in southwestern Hungary (Lábod region). The aims were to analyze foetal growth rate, assess the interaction between prenatal growth and maternal condition, and to examine factors influencing birth mass, and to measure fawn growth rates. During the study period foetal body mass (BM), body length (BL) and head length (HL) showed sigmoid growth. Correlations (rP) among the three features (BM, BL and HL) ranged from 0.78 to 0.93. Foetal BM was a quadratic function of foetal BL in both sexes. Foetal BM was linearly and negatively related to maternal kidney-fat-index (KFI) and body mass. Average birth mass was greater in males (4.66 kg) than females (4.31 kg), and it was greater in the middle of the fawning season (in the middle of June) than in the beginning (in May). The BM and the KFI of the fawns decreased at the end of the winter (February, eight months of age) but increased thereafter. The growth analysis of fawns generally showed that males compared with the females were heavier and larger; however it was not manifested clearly in all cases.
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