undirected social network recording frequent associations between pairs in a community of 62 dolphins living off Doubtful Sound, New Zealand.
References
D. Lusseau, K. Schneider, O. J. Boisseau, P. Haase, E. Slooten, and S. M. Dawson, The bottlenose dolphin community of Doubtful Sound features a large proportion of long-lasting associations, Behavioral Ecology and Sociobiology 54, 396-405 (2003).
D. Lusseau, The emergent properties of a dolphin social network, Proc. R. Soc. London B (suppl.) 270, S186-S188 (2003).
D. Lusseau, Evidence for social role in a dolphin social network, Preprint q-bio/0607048 (http://arxiv.org/abs/q-bio.PE/0607048)