Université de Neuchâtel

Variable responses of hawkmoths to nectar-depleted plants in two native Petunia axillaris (Solanaceae) populations

Brandenburg, Anna ; Bshary, Redouan

In: Arthropod-Plant Interactions, 2011, vol. 5, no. 2, p. 141-148

Pollination success of deceptive orchids is affected by the density and distribution of nectar providing plant species and overall plant density. Here we extended the framework of how plant density can affect pollination to examine how it may promote the success of plant intraspecific cheaters. We compared hawkmoth behaviour in two native populations of Petunia axillaris, where we...

Université de Neuchâtel

Experimental evidence that partner choice is a driving force in the payoff distribution among cooperators or mutualists : the cleaner fish case

Bshary, Redouan ; Grutter, Alexandra S.

In: Ecology Letters, 2002, vol. 5, p. 130-136

Supply and demand largely determine the price of goods on human markets. It has been proposed that in animals, similar forces influence the payoff distribution between trading partners in sexual selection, intraspecific cooperation and interspecific mutualism. Here we present the first experimental evidence supporting biological market theory in a study on cleaner fish, Labroides dimidiatus....

Université de Neuchâtel

Building up relationships in asymmetric co-operation games between the cleaner wrasse Labroides dimidiatus and client reef fish

Bshary, Redouan

In: Behavioral Ecology and Sociobiology, 2002, vol. 52, p. 371-377

It has been suggested that individuals may prevent partners from cheating by building up relationships slowly, giving very little in the beginning and raising the stakes in subsequent moves if partners reciprocate. I tested this idea with field experiments on the cleaner-fish Labroides dimidiatus and its "client" reef fish. Clients visit cleaners at their small territories, so-called cleaning...

Université de Neuchâtel

Cleaner wrasse prefer client mucus : support for partner control mechanisms in cleaning interactions

Grutter, Alexandra S. ; Bshary, Redouan

In: Proceedings of the Royal Society B : Biological Sciences, 2003, vol. 270, p. 242-244

Recent studies on cleaning behaviour suggest that there are conflicts between cleaners and their clients over what cleaners eat. The diet of cleaners usually contains ectoparasites and some client tissue. It is unclear, however, whether cleaners prefer client tissue over ectoparasites or whether they include client tissue in their diet only when searching for parasites alone is not profitable. To...

Université de Neuchâtel

Cleaner fish Labroides dimidiatus manipulate client reef fish by providing tactile stimulation

Bshary, Redouan ; Würth, Manuela Würth

In: Proceedings of the Royal Society B : Biological Sciences, 2001, vol. 268, p. 1495-1501

The cleaner wrasse Labroides dimidiatus often touches 'client' reef fish dorsal fin areas with its pelvic and pectoral fins. The relative spatial positions of cleaner and client remain constant and the cleaner's head points away from the client's body. Therefore, this behaviour is not compatible with foraging and the removal of client ectoparasites. As clients seek such 'tactile...

Université de Neuchâtel

Biting cleaner fish use altruism to deceive image-scoring client reef fish

Bshary, Redouan

In: Proceedings of the Royal Society B : Biological Sciences, 2004, vol. 269, p. 2087-2093

Humans are more likely to help those who they have observed helping others previously. Individuals may thus benefit from being altruistic without direct reciprocity of recipients but due to gains in 'image' and associated indirect reciprocity. I suggest, however, that image-scoring individuals may be exploitable by cheaters if pay-offs vary between interactions. I illustrate this point with data...