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Figure 3 | BMC Evolutionary Biology

Figure 3

From: Reciprocal cooperation between unrelated rats depends on cost to donor and benefit to recipient

Figure 3

Number of pulls in dependence of the weight of the social partner. (A) The number of pulls of focal rats for a hungry partner decreased with increasing weight of the experimental partner (p = 0.013). (B) In contrast, rats pulled for satiated partners more often when these were heavier (p = 0.013; two overlapping points were slightly shifted to make them visible in the graph); n = 14 for both treatments.

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