Université de Neuchâtel

The ecology underlying decision rules of bluestreak cleaner wrasse during client interactions

McAfoose, Sharon ; Bshary, Redouan (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Cooperation is defined as a ‘helping’ behaviour that provides direct fitness benefits to other individuals. Such behaviours have long intrigued biologists, as it poses a problem for classic evolutionary theory, i.e. why should an individual perform a behaviour that is beneficial to other individuals? Indeed, an expansive body of work on evolutionary game theory, as well as, empirical studies,...

Université de Neuchâtel

Cortisol mediates cleaner wrasse switch from cooperation to cheating and tactical deception

Soares, Marta C ; Cardoso, Sónia C ; Grutter, Alexandra S ; Oliveira, Rui F ; Bshary, Redouan

In: Hormones and Behavior, 2014, vol. 66, no. 2, p. 346-350

Recent empirical research, mostly done on humans, recognizes that individuals' physiological state affects levels of cooperation. An individual's internal state may affect the payoffs of behavioural alternatives, which in turn could influence the decision to either cooperate or to defect. However, little is known about the physiology underlying condition dependent cooperation. Here, we...

Université de Neuchâtel

Do cleaner fish learn to feed against their preference in a reverse reward contingency task?

Danisman, Evin ; Bshary, Redouan ; Bergmüller, Ralph

In: Animal Cognition, 2010, vol. 13, no. 1, p. 41-49

The ability to control impulsive behaviour has been studied in animals with a standard test in which subjects need to choose the smaller of two food items in order to receive the larger one (reverse reward contingency). As a variety of mammals that have been tested so far (mostly primates) have great difficulties to solve the task, it has been proposed that it is generally cognitively demanding....