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Université de Neuchâtel

Variation in Cleaner Wrasse Cooperation and Cognition: Influence of the Developmental Environment?

Wismer, Sharon ; Pinto, Ana I ; Vail, Alex L ; Grutter, Alexandra S ; Bshary, Redouan

In: Ethology, 2014, vol. 120, no. 6, p. 519-531

Deviations from model-based predictions of strategies leading to stable cooperation between unrelated individuals have raised considerable debate in regards to decision- making processes in humans. Here, we present data on cleaner wrasse (Labroides dimidiatus) that emphasize the importance of generalizing this discussion to other species, with the aim to develop a coherent theoretical...

Université de Neuchâtel

Intra- and interspecific challenges modulate cortisol but not androgen levels in a year-round territorial damselfish

Ros, Albert F. H ; Vullioud, Philippe ; Bruintjes, Rick ; Vallat, Armelle ; Bshary, Redouan

In: The Journal of Experimental Biology, 2014, vol. 217, no. 10, p. 1768-1774

Interactions between individuals of different species are commonplace in animal communities. Some behaviors displayed during these interspecific social interactions may be very similar to those displayed during intraspecific social interactions. However, whether functional analogies between intra- and interspecific behaviors translate at the proximate level into an overlap in their underlying...

Université de Neuchâtel

Wild vervet monkey infants acquire the food-processing variants of their mothers

Van de Waal, Erica ; Bshary, Redouan ; Whiten, Andrew

In: Animal Behaviour, 2014, vol. 90, p. 41-45

In the ability and motivation to copy others, social learning has been shown to provide a mechanism for the inheritance of behavioural traditions. Major questions remain about the circumstances and models that shape such social learning. Here, we demonstrate that behavioural food-processing variants among wild vervet monkey, Chlorocebus aethiops, mothers are matched by their infants in...

Université de Neuchâtel

Negotiations over Grooming in Wild Vervet Monkeys (Chlorocebus pygerythrus)

Van de Waal, Erica ; Spinelli, Martina ; Bshary, Redouan ; Ros, Albert Frank Huascar ; Noë, Ronald

In: International Journal of Primatology, 2013, vol. 34, no. 6, p. 1153-1171

Mutual grooming plays a central role in the establishment and maintenance of social relationships in primates. Allogrooming has two main functions: hygiene and bonding with partners. The duration of grooming bouts is commonly used in studies of the functional aspects of grooming, but few reflect on the proximate mechanisms that determine grooming bout lengths. As it is highly unlikely that...

Université de Neuchâtel

Referential gestures in fish collaborative hunting

Vail, Alexander L ; Manica, Andrea ; Bshary, Redouan

In: Nature Communications, 2013, vol. 4, p. 1765

In humans, referential gestures intentionally draw the attention of a partner to an object of mutual interest, and are considered a key element in language development. Outside humans, referential gestures have only been attributed to great apes and, most recently, ravens. This was interpreted as further evidence for the comparable cognitive abilities of primates and corvids. Here we describe a...

Université de Neuchâtel

Differences in Diet Between Six Neighbouring Groups of Vervet Monkeys

Tournier, Emilie ; Tournier, Virginia ; Van de Waal, Erica ; Barrett, Alan ; Brown, Leslie ; Bshary, Redouan

In: Ethology, 2014, vol. 120, no. 5, p. 471-482

The comparative approach provides a powerful tool to study evolutionary questions on both intra- and interspecific variation. It has been applied to a great variety of taxa, including primates. Primate studies differ from those on most other taxa in two ways: first, data from most study sites contain information about only one group. Second, primatologists have used the comparative approach...

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

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

Intra- and interspecific aggression do not modulate androgen levels in dusky gregories, yet male aggression is reduced by an androgen blocker

Vullioud, Philippe ; Bshary, Redouan ; Ros, Albert Frank Huascar

In: Hormones and Behavior, 2013, vol. 64, no. 3, p. 430-438

Discussions about social behavior are generally limited to fitness effects of interactions occurring between conspecifics. However, many fitness relevant interactions take place between individuals belonging to different species. Our detailed knowledge about the role of hormones in intraspecific interactions provides a starting point to investigate how far interspecific interactions are...

Université de Neuchâtel

Gains of Bacterial Flagellar Motility in a Fungal World

Pion, Martin ; Bshary, Redouan ; Bindschedler, Saskia ; Filippidou, Sevasti ; Wick, Lukas Y ; Job, Daniel ; Junier, Pilar

In: Applied and Environmental Microbiology, 2013, vol. 79, no. 22, p. 6862-6867

The maintenance of energetically costly flagella by bacteria in non-water-saturated media, such as soil, still presents an evolutionary conundrum. Potential explanations have focused on rare flooding events allowing dispersal. Such scenarios, however, overlook bacterial dispersal along mycelia as a possible transport mechanism in soils. The hypothesis tested in this study is that dispersal along...