Université de Neuchâtel

Mutualism, market effects and partner control

Johnstone, Rufus A. ; Bshary, Redouan

In: Journal of Evolutionary Biology, 2008, vol. 21, no. 3, p. 879-888

Intraspecific cooperation and interspecific mutualism often feature a marked asymmetry in the scope for exploitation. Cooperation may nevertheless persist despite one-sided opportunities for cheating, provided that the partner vulnerable to exploitation has sufficient control over the duration of interaction. The effectiveness of the threat of terminating an encounter, however, depends upon the...

Université de Neuchâtel

Strategic adjustment of service quality to client identity in the cleaner shrimp, Periclimenes longicarpus

Chapuis, Lucille ; Bshary, Redouan

In: Animal Behaviour, 2009, vol. 78, no. 2, p. 455-459

Cleaning mutualism, in which cleaning organisms remove ectoparasites from cooperating ‘clients’, is widespread among marine animals. Until now, research has focused on fishes as cleaners, whereas cleaner shrimps have received little attention. The aim of this study was to investigate the cleaning behaviour of the cleaner shrimp, Periclimenes longicarpus, and to compare the results...

Université de Neuchâtel

Signalling by the cleaner shrimp Periclimenes longicarpus

Chapuis, Lucille ; Bshary, Redouan

In: Animal Behaviour, 2010, vol. 79, no. 3, p. 645-647

Signals increase the fitness of a sender by altering the behaviour of receivers. For cooperative interactions biological market theory proposes that signalling strength may be linked to supply and demand. In this context, a recent laboratory experiment demonstrated that cleaner shrimps may advertise their service to client reef fish and that the advertisement is linked to hunger levels. We...