The ability to recognize a conspecific signal is essential to communication. In addition to recognizing the type of call, receivers extract a range of information from the signal about the producer, including identity, sex and dialect. Despite the apparent ease with which this is accomplished, few available data address the computational processes underlying recognition. While it is possible th...

Foraging decisions in nonhuman animals often require choosing between small, immediate food rewards and larger, more delayed rewards. Faced with such choices, animals typically discount or devalue the future quite strongly. Although discounting studies often focus on delays to reward access, other temporal intervals contribute to foraging rate, and thus may potentially influence discounting lev...

Nonhuman animals steeply discount the future, showing a preference for small, immediate over large, delayed rewards. Currently unclear is whether discounting functions depend on context. Here, we examine the effects of spatial context on discounting in cotton-top tamarins (Saguinus oedipus) and common marmosets (Callithrix jacchus), species known to differ in temporal discounting. We presented ...

In the cooperative breeding system of cotton-top tamarin (TCB; Saguinus oedipus) <> males gain weight during the last months of pregnancy of their partners as a way to cope with energy costs of reproduction. This phenomenon was described only in humans as a symptom of <>. As after infants' birth, TCB male and female helpers lose weight, the same as fathers do, it mi...