Memory-based evolutionary game on small-world network with tunable heterogeneity

Deng, Xiaoheng; Liu, Yi; Chen, Zhigang

doi:10.1016/j.physa.2010.08.004

Cited by 29 publications

(12 citation statements)

References 30 publications

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“…Thus, it appears that coprophagy by impacting gut microbiome may also be important for neural development and memory. Specific brain regions, such as the hypothalamus and hippocampus, participate in learning and memory through neurotransmitters like 5-HT and DA, and the loss of these monoaminergic substances is the most important neurochemical process leading to memory loss [46,47,48,49]. Our results showed that the CP group had lower concentrations of 5-HT and its metabolite 5-HIAA in the hippocampus, which may be caused by the shortage of microbial products.…”

Section: Coprophagy Affects Vole's Memorymentioning

confidence: 66%

Coprophagy prevention alters microbiome structure and function and impairs memory in a small mammal

Zhang

Kohl

et al. 2019

Preprint

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Background In the long process of adaptive evolution, many small mammals engage in coprophagy, or the behavior of consuming feces, as a means to meet nutritional requirements when feeding on low-quality foods. In addition to nutritional benefits, coprophagy may also help herbivores retain necessary gut microbial diversity and function, which may have downstream physiological effects, such as maintaining energy balance and cognitive function. Here, we used collars to prevent Brandt’s vole (Lasiopodomys brandtii) from engaging in coprophagy and monitored changes in microbial community structure, energy metabolism, and memory formation. Results In this research, we found that coprophagy prevention decreased alpha diversity of the gut microbiota, and altered abundances of microbial taxa such as Bacteroidetes, Firmicutes and Oscillospira. The coprophagy prevention decreased body mass while increased food intake and ghrelin level in serum. Importantly, coprophagy prevention decreased vole’s memory and neurotransmitters in brain. The administration of acetate compensated for the energy loss and decline of spatial memory caused by coprophagy prevention and partially rescued the composition and structure of gut microbiota. Conclusions These findings identify relationship between coprophagy behavior and interactions between the gut microbiota, energy metabolism and neurological function. Our results suggest that coprophagy may have a positive effect on animal’s nutritional requirements and ecological adaptations by improving memory function.

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Section: Coprophagy Affects Vole's Memorymentioning

confidence: 66%

Coprophagy prevention alters microbiome structure and function and impairs memory in a small mammal

Zhang

Kohl

et al. 2019

Preprint

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show abstract

“…Particularly, Nowak and May seminally investigated the evolutionary dynamics of PDG on the spatially regular lattice with the fixed neighborhood, revealing that the cooperative agents on spatial structures can organized into the tight clusters to resist the attack and exploitation from defectors, which is known as the spatial or network reciprocity [23]. After that, numerous different underlying topologies have also been successfully confirmed to contribute to the evolutionary cooperation, which include smallworld [24], scale-free [25] and independent or multilayer networks [26,27], to name but a few. Moreover, to explore how to facilitate the evolution of cooperation, some additional incentive mechanism have also been proposed, for instance, reputation [28,29], mobility [30,31], information sharing [32,33], memory effect [34,35], multigames [36,37] and so on, to further facilitate the persistence and emergence of collective cooperation.…”

Section: Introductionmentioning

confidence: 99%

Role of influence-induced dynamic link weight adjustment in the cooperation of spatial prisoner’s dilemma game

Zhao

Zhang

2021

Eur. Phys. J. B

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We propose a novel dynamic link weight adjustment model, in which link weights on static network will be dynamically adjusted according to agents' influence during the evolutionary process. To be specific, when an agent's strategy is learned by one of his direct neighbors, his influence will be expanded by one unit β. Then link weights between agents will be adaptively adjusted by counting the influence of agents. Meanwhile, we utilize a variable δ to control the range of link weights, that is, link weights can only be limited within the interval [1 − δ, 1 + δ]. In our model, it should be noted that link weights between agents will be integrated into the fitness calculation process. Through abundant simulations, the results indicate that the newly proposed model can significantly foster the persistence and emergence of cooperation. In addition, when the cost-to-benefit ratio u is quite small, the level of cooperation will increase with the augmentation of δ. However, when the cost-to-benefit ratio u exceeds a certain value, the level of cooperation increases at the early stage and then decreases with the growth of δ. As for the potential reasons, we observe that it is closely related to the type of connections, in which the cooperation can flourish once C − C type links dominate the system, while other types will hamper the evolution of cooperation. Taking together, the current model and results will provide some insights into the collective cooperation within the human population.

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“…Studies referring to memory propose that historic memory can be implemented by featuring players by a summary of their previous winnings and choices. Various models [36][37][38][39][40][41][42][43], where the effects of full or discounted memory are assessed, have suggested that memory can influence the emergence of cooperation for self-interested agents under suitable conditions.…”

Section: Introductionmentioning

confidence: 99%

“…This is reflected by the vanishing number of traitors present at the end of the simulation runs for longer memories. The literature of [38] introduces a memory-based agent model and investigates the PDG in a heterogeneous Newman-Watts small-world network based on a Genetic Algorithm, focusing on the heterogeneity's role in enhancing the emergence of cooperative behaviors. Moreover, the effects of full and partial memories are assessed in a spatial version of the PDG in reference [39].…”

Section: Introductionmentioning

confidence: 99%

Evolutionary games played by multi-agent system with different memory capacity

Zhang

2015

Eur. Phys. J. B

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Memory-based evolutionary game on small-world network with tunable heterogeneity

Cited by 29 publications

References 30 publications

Coprophagy prevention alters microbiome structure and function and impairs memory in a small mammal

Coprophagy prevention alters microbiome structure and function and impairs memory in a small mammal

Role of influence-induced dynamic link weight adjustment in the cooperation of spatial prisoner’s dilemma game

Evolutionary games played by multi-agent system with different memory capacity

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