The pitch of USVs generally showed a bimodal distribution with one peak around 60 kHz and another peak around 90 kHz. We next investigated to what extent this distribution changed during development. USVs produced during the first week of life belonged more often to the lower peak of the dist...
Another reason for the success of network reciprocity is its simplicity, namely the fact that it does not require strategical complexity. It indeed works even in EGT setups in which cooperation is unconditional, whereas all other mechanisms proposed to explain cooperation [12] either make cooperation...