Maracas for Macaca? Evaluation of three potential enrichment objects in two species of zoo-housed macaques
Abstract 10.1002/1098-2361(2000)19:33.3.CO;2-N One group each of Barbary macaques and stump-tailed macaques, both zoo-housed, received hard replica fruits in three experimental conditions: as empty (“unresponsive”) objects, as maracas that rattled when manipulated (“simple responsive”), and as objects from which food items could be extracted (“foraging devices”). Both groups manipulated the replica fruits most when they functioned […]
Maternal testosterone influences a begging component that makes fathers work harder in chick provisioning
Abstract In species with biparental care, parents disagree evolutionarily over the amount of care that each of them is willing to provide to offspring. It has recently been hypothesised that females may try to manipulate their mates by modifying offspring begging behaviour through yolk hormone deposition, shifting the division of labour in their own favour. […]
Signals in family conflicts
Although the role of animal signals in the resolution of family conflicts has been thoroughly studied, it has been typically analysed in isolated two-player interactions. For instance, parents are usually considered as the sole receivers of offspring begging signals or mates the receivers of sexual displays. However, this view does not wholly encompass the dynamic […]