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Université de Neuchâtel

What makes a cleaner a cleaner ?

Gingins, Simon ; Bshary, Redouan (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

In his last presidential address to the Royal Society in 2005, Robert M. May stated that “The most important unanswered question in evolutionary biology, and more generally in the social sciences, is how cooperative behaviour evolved and can be maintained”. My thesis provides a contribution to answering this big question by investigating how one particular species evolved for an ecology that...

Université de Neuchâtel

Indo-Pacific parrotfish exert partner choice in interactions with cleanerfish but Caribbean parrotfish do not

Soares, Marta C ; Cardoso, Sónia C ; Nicolet, Katia J ; Côté, Isabelle M ; Bshary, Redouan

In: Animal Behaviour, 2013, vol. 86, no. 3, p. 611-615

Cooperation theory puts a strong emphasis on partner control mechanisms that have evolved to stabilize cooperation against the temptation of cheating. The marine cleaning mutualism between the Indo-Pacific bluestreack cleaner wrasse, Labroides dimidiatus, and its reef fish ‘clients’ has been a model system to study partner control mechanisms and counterstrategies. These cleaners...

Université de Neuchâtel

Bacterial farming by the fungus Morchella crassipes

Pion, Martin ; Spangenberg, Jorge E ; Simon, Anaele ; Bindschedler, Saskia ; Flury, Coralie ; Chatelain, Auriel ; Bshary, Redouan ; Job, Daniel ; Junier, Pilar

In: Proceedings of the Royal Society B: Biological Sciences, 2013, vol. 280, no. 1173, p. 20132242

The interactions between bacteria and fungi, the main actors of the soil microbiome, remain poorly studied. Here, we show that the saprotrophic and ectomycorrhizal soil fungus Morchella crassipes acts as a bacterial farmer of Pseudomonas putida, which serves as a model soil bacterium. Farming by M. crassipes consists of bacterial dispersal, bacterial rearing with fungal...

Université de Neuchâtel

Cooperation and competition in two forest monkeys

Eckardt, Winnie ; Zuberbühler, Klaus

In: Behavioral Ecology, 2004, vol. 15, no. 3, p. 400-411

Putty-nosed monkeys, Cercopithecus nictitans stampflii, occur at various sites in West Africa, particularly in the transition zone between rainforest and savannah. The species is sometimes seen in primary rainforest, although at a curiously low density compared with that of other monkey species. We conducted a 24-month field study in the tropical rainforest of Taï National Park, Ivory...

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...

Université de Neuchâtel

Inferring reciprocal evolutionary histories in associated species of plants and insects in two european pollination systems

Espíndola, María Anahí ; Alvarez, Nadir (Dir.) ; Rahier, Martine (Codir.) ; Carstens, Bryan C. (Codir.) ; Després, Laurence (Codir.) ; Gibernau, Marc (Codir.) ; Gugerli, Felix (Codir.) ; Küpfer, Philippe (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2010.

Coevolution is defined as reciprocal evolutionary changes that might arise at any spatiotemporal scale. Despite every organism on Earth undergoes coevolutionary interactions, cases of one-to-one specific relationships are generally rare. However, because of the reduced number of interacting species they concern, these species-specific associations are interesting to evolutionary biologists...

Université de Neuchâtel

Evolutionary conflicts and ecological constraints at reproduction in the dioecious plant Silene latifolia

Burkhardt, Anne ; Bernasconi, Giorgina (Dir.) ; Benrey, Betty (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2009.

Les fleurs sont d’une étonnante diversité de formes et de couleurs. Les plantes ayant des sexes séparés (dioécie) sont d’un intérêt particulier car différentes pressions de sélection peuvent s’exercer sur les deux sexes, amenant à l’évolution d’un dimorphisme sexuel des fleurs. De nombreuses études ont montré que les pollinisateurs favorisaient les plantes à grandes ou...