Herd composition, kinship and fission–fusion social dynamics among wild giraffe

Author(s)Fred B. Bercovitch and Philip S. M. Berry
Year Published2012
JournalJournal: African Journal of Ecology
Page Numbers206-216
Size261.16 KB

A variety of social systems have evolved as a consequence of competition and cooperation among individuals. Giraffe (Giraffa camelopardalis sp.) societies are an anomaly because the dearth of long-term data has produced two polar perspectives: a loose amalgamation of non-bonded individuals that sometimes coalesce into a herd and a structured social system with a fission–fusion process modifying herd composition within a community. We analysed 34 years of data collected from a population of Thornicroft’s giraffe (G. c. thornicrofti, Lydekker 1911) residing in South Luangwa, Zambia, to establish the nature of giraffe society. Our sample consisted of 52 individually recognized animals. We found that giraffe herd composition is based upon long-term social associations that often reflect kinship, with close relatives significantly more likely than non-relatives to establish herds. Mother/offspring dyads had the strongest associations, which persisted for years. Giraffe live in a complex society characterized by marked flexibility in herd size, with about 25% of the variance in herd composition owing to kinship and sex. We suggest that giraffe herds share many characteristics of fission–fusion social systems and propose that sophisticated communication systems are a crucial component regulating subgroup dynamics.

Key words: fission–fusion, Giraffa camelopardalis, giraffe, kinship, social association index, social systems

Authors: Fred B. Bercovitch and Philip S. M. Berry

Journal: African Journal of Ecology 

Bercovitch and Berry - 2013 - Herd composition, kinship and fission-fusion socia.pdfDownload 
Terms and Conditions: Any PDF files provided by the GRC are for personal use only and may not be reproduced. The files reflect the holdings of the GRC library and only contain pages relevant to giraffe study, and may not be complete. Users are obliged to follow all copyright restrictions.