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Abstract
1. In two partridge species, the grey partridge (Perdix perdix) and chukar (Alectoris chukar), from hatching up to 120 d, the growth rate and development of body mass, wing, tarsus, and bill length were measured and fitted by Gompertz equations.
2. As a typical precocial species, partridges hatched with relatively well developed legs and bills, and wing growth followed a gradual development of thermoregulation.
3. Gompertz growth constants for body mass growth were 0·039 and 0·038 for grey partridges and chukars, respectively.
4. The allometric relationship between tarsus length and body mass followed a geometric similarity (1/3 power) in both grey partridges and chukars.
Acknowledgments
I sincerely thank my close friend Edward Szmyd for his assistance in measurements. I am very grateful to the Game Breeding Centre Authorities at Ptaszkowo for allowing me to carry out my studies and for their great hospitality. The work was partly financed by the Jagiellonian University (grant WRBW/BiNoS/INoŚ/62/2007). All experiments complied with Polish law regarding animal experimentation and were performed under resolution 70/2007 from the 1st Local Bioethics Committee in Cracow.