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Altruism in Forest Chimpanzees: The Case of Adoption

Figure 2

Orphans adopted do not present higher likelihood of surviving for 2 years the death of their mother than non-adopted orphans in Taï chimpanzees (X2 = 0.37, df = 1, p = 0.54).

Figure 2

doi: https://doi.org/10.1371/journal.pone.0008901.g002