Necks and networks: a preliminary study of population structure in the reticulated giraffe (Giraffa camelopardalis reticulata de Winston)

This paper describes a method of scoring the neck pattern of reticulated giraffes as a simple code that can be searched for in an Excel spreadsheet. This enables several hundred individual giraffe to be recognized and repeatedly found within a database. Possible sources of error are described and quantified. Data on group size, dispersal within groups and social network patterns are described. The latter is facilitated using Ucinet 6.85 for Windows, a software package that helps to visualize and analyse such networks. Resume Cet article decrit une methode pour noter le pattern du cou des girafes reticulees comme un code simple qui peut etre consulte dans un tableau Excel. Cela permet de reconnaitre individuellement plusieurs centaines de girafes et de les retrouver facilement dans une base de donnees. Plusieurs sources d’erreurs sont decrites et quantifiees. Les donnees sur la taille des groupes, la dispersion entre les groupes, et les schemas de reseau social sont decrits. Ce dernier est facilite par l’utilisation d’Ucinet 6.85 pour Windows, un progiciel qui vous aide a visualiser et a analyser de tels reseaux.

[1]  M. Newman,et al.  Identifying the role that animals play in their social networks , 2004, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[2]  Sexual segregation by Masai giraffes at two spatial scales , 1999 .

[3]  Richard James,et al.  Social networks in the guppy (Poecilia reticulata) , 2004, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[4]  S. Braude,et al.  Notes and Records: Notes and Records , 1999 .

[5]  J. Krause,et al.  Social network theory in the behavioural sciences: potential applications , 2007, Behavioral Ecology and Sociobiology.

[6]  K. N. Laland,et al.  Social structure and co-operative interactions in a wild population of guppies (Poecilia reticulata) , 2006, Behavioral Ecology and Sociobiology.

[7]  David Lusseau,et al.  The emergent properties of a dolphin social network , 2003, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[8]  J. B. Foster THE GIRAFFE OF NAIROBI NATIONAL PARK: HOME RANGE, SEX RATIOS, THE HERD, AND FOOD , 1966 .

[9]  Mark E. J. Newman,et al.  The Structure and Function of Complex Networks , 2003, SIAM Rev..