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Thirteen male dolphins were observed as they swam in a shallow lagoon. Tabulations were made of who was swimming with whom. The table shows the observed frequencies.

Usage

dolphins_1

Format

igraph object

Source

http://moreno.ss.uci.edu/data.html#dolphin

References

R. C. Connor, R. A. Smolker and A. F. Richards, 1992, "Dolphin alliances and coalitions," in Coalitions and Alliances in Humans and Other Animals (Eds: A. H. Harcourt and F. B. M. deWaal). Oxford: Oxford University Press, 415-444.