North American Crane Working Group
Date of this Version
2001
Document Type
Article
Citation
Nesbitt, Stephen A. Aspects of reproduction and pair bonds in Florida sandhill cranes. In: Ellis, David H., ed., Proceedings of the Eighth North American Crane Workshop, 11–14 January 2000, Albuquerque, New Mexico (Seattle, Wash: North American Crane Working Group, 2001), pp. 31-35.
Abstract
From 1980-98 we captured and uniquely marked more than 400 Florida sandhill cranes (Grus canadensis prafensis). Age ratios of the marked population, excluding juveniles, was 66% adult and 33% subadult, and the sex ratio was 49% male and 51% female. Average clutch size for 210 nests checked from 1983-97 was 1.78 ± 0.18 (SD) and frequency of l-egg clutches varied among years. Average post-fledging brood size from 1991 to 1997 was 1.27 ± 0.17 (SD), included a 3-chick brood. Average percent ofYOlmg from 2 study areas, 1991-97 was 11.9 ± 3.23 (SD). We observed renesting up to 3 times, even after chicks had been hatched and reared for up to 16 days. Re-pairing following death or divorce was documented and was particularly noteworthy in a female that oscillated between 2 males during 4 years of observation.
Included in
Behavior and Ethology Commons, Biodiversity Commons, Ornithology Commons, Population Biology Commons, Terrestrial and Aquatic Ecology Commons
Comments
Reproduced by permission of the North American Crane Working Group (NACWG).