André Rodrigues de Souza

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In simple societies, activity of the workers can be regulated in a centralized way by a sole individual. Polistes wasps are simple in some respects because they have small, open colonies, with a single queen who is not morphologically differentiated from the workers. Worker activity in Polistes is episodic. Pause periods are followed by periods of intense(More)
Recent studies have reported incipient morphological caste dimorphism in the Van der Vecht organ size of some temperate Polistes paper wasps. Whether species other than the temperate ones show a similar pattern remains elusive. Here, we have studied some Neotropical Polistes species. By comparing females collected through the year, we showed caste related(More)
Sexually selected signals are common in many animals, though little reported in social insects. We investigated the occurrence of male visual signals mediating the dominance relationships among males and female choice of sexual partner in the paper wasp Polistes simillimus. Males have three conspicuous, variable and sexually dimorphic traits: black(More)
Individual recognition (IR) has been demonstrated in some Pachycondyla ants. The maintenance of such memories is challenged when queens are separated for the few hours of forage (attenuation) or when they are simultaneously interacting with conspecifics in a reduced space, that is, the nest (interference). By quantifying the level of aggression among(More)
Physical aggression among nestmates is commonly observed in animal societies like Polistes paper wasps, where it can be used to suppress worker reproduction. There is no consensus about how individuals use aggression in contexts other than reproduction. In order to clarify this topic, the regulation of worker-foraging behavior was studied in the Neotropical(More)
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