Sueur C, Petit O
Ethologie des Primates, Département d'Ecologie, Physiologie et Ethologie, France.
Behav Processes. 2008 May;78(1):84-92. doi: 10.1016/j.beproc.2008.01.004. Epub 2008 Jan 16.
Members of a social group have to make collective decisions in order to synchronise their activities. In a shared consensus decision, all group members can take part in the decision whereas in an unshared consensus decision, one individual, usually a dominant member of the group, takes the decision for the rest of the group. It has been suggested that the type of decision-making of a species could be influenced by its social style. To investigate this further, we studied collective movements in two species with opposed social systems, the Tonkean macaque (Macaca tonkeana) and the rhesus macaque (Macaca mulatta). From our results, it appears that the decision to move is the result of the choices and actions of several individuals in both groups. However, this consensus decision involved nearly all group members in Tonkean macaques whereas dominant and old individuals took a prominent role in rhesus macaques. Thus, we suggest that Tonkean macaques display equally shared consensus decisions to move, whereas in the same context rhesus macaque exhibit partially shared consensus decisions. Such a difference in making a collective decision might be linked to the different social systems of the two studied species.
一个社会群体的成员必须做出集体决策，以便协调他们的活动。在共享共识决策中，所有群体成员都可以参与决策，而在非共享共识决策中，通常由群体中的一个主导成员为其他成员做出决策。有人认为，一个物种的决策类型可能会受到其社会风格的影响。为了进一步研究这一点，我们研究了具有相反社会系统的两个物种——黑冠猕猴（Macaca tonkeana）和恒河猴（Macaca mulatta）的集体运动。从我们的结果来看，似乎移动的决策是两个群体中几个个体的选择和行动的结果。然而，这种共识决策在黑冠猕猴中涉及几乎所有群体成员，而在恒河猴中，主导个体和年长个体发挥了突出作用。因此，我们认为黑冠猕猴在移动时表现出平等共享的共识决策，而在相同情况下，恒河猴表现出部分共享的共识决策。这种集体决策的差异可能与所研究的两个物种不同的社会系统有关。
