Marathon Montpellier 2014

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Ce dimanche 19 octobre, l’Institut des Sciences de l’Évolution a participé au marathon de Montpellier 5ème édition.
Nos 2 équipes équipes mixtes pour le relais à 6, on couru en :
– 3:51:57 pour l’une (195ème relais mixte sur 643)
– 3:53:02 pour l’autre (201ème relais mixte sur 643)

Robert Noble (équipe Evolution et Ecologie des Communautés) a terminé 15ème EN SOLO, en 2:53:03 !

Félicitations à nos coureurs et un grand Bravo à Pierre-Olivier Antoine qui a une nouvelle fois montré ses talents de super coordinateur.

L’ISEM dans sa plus grande mixité et déjà dans sa configuration 2015 !

Séminaire du Lundi | Jean-Baptiste André 6 octobre

JB AndreLundi 6 octobre Jean-Baptiste André, qui a rejoint l’ISEM, le département Diversité et l’équipe de Biologie Evolutive Humaine, cet été, nous parlera de  « Why is reciprocity so rare? ».
Venez nombreux l’écouter à 11h en salle Louis Thaler, bâtiment 22, 2ième étage, ISEM, UM2.
Abstract:
« Why is reciprocity so rare? ».
An important mechanism by which two individuals can mutually benefit from helping each other is reciprocity (in a broad sense). However, reciprocity is the object of an evolutionary paradox: a gap between theoretical predictions and empirical observations. On one hand, evolutionary modelers have shown that it can evolve relatively easily in a wide array of circumstances. On the other hand, empirically, very few clear instances of reciprocity are found outside the human species. 


In this talk, I will propose a simple explanation to resolve this paradox. I will suggest that reciprocity has rarely evolved because it raises an evolutionary problem of «bootstrapping» of the same kind as communication: it entails the joint evolution of several functions in the same time. Therefore, even though reciprocity may be adaptive once it has already evolved (i.e. it can be an ESS) it cannot be shaped gradually by natural selection.

Along with a mathematical proof of this idea, I will present evolutionary robotics experiments developed in collaboration with Stefano Nolfi (CNR, Rome, Italy) to test this idea. We consider a setting in which two individuals can help each other to forage. In this setting, reciprocal cooperation is evolutionarily stable, because it allows individuals to reach the benefit of cooperation without paying the cost of being exploited by cheaters. However, our experiments show that, in spite of its potential benefit, reciprocal cooperation cannot evolve because of the bootstrapping problem. These results will then be discussed in the context of animal behavior.