F
Frederic Bartumeus
Researcher at Spanish National Research Council
Publications - 152
Citations - 6869
Frederic Bartumeus is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Population & Foraging. The author has an hindex of 44, co-authored 138 publications receiving 5975 citations. Previous affiliations of Frederic Bartumeus include Catalan Institution for Research and Advanced Studies & Hospital de Sant Pau.
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Animal search strategies: a quantitative random-walk analysis
Frederic Bartumeus,Frederic Bartumeus,M. G. E. da Luz,Gandhimohan. M. Viswanathan,Jordi Catalan +4 more
TL;DR: This work analyzes the statistical differences between two random-walk models commonly used to fit animal movement data, the Levy walks and the correlated random walks, and quantifies their efficiencies within a random search context.
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Optimizing the Encounter Rate in Biological Interactions: Lévy versus Brownian Strategies
Frederic Bartumeus,Frederic Bartumeus,Jordi Catalan,Umberto L. Fulco,Marcelo L. Lyra,Gandhimohan. M. Viswanathan +5 more
TL;DR: It is found that Lévy walks confer a significant advantage for increasing encounter rates when the searcher is larger or moves rapidly relative to the target, and when the target density is low.
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T cell migration, search strategies and mechanisms
TL;DR: In particular, insights from 'search theory' can be used to describe T cell movement across an 'exploitation–exploration trade-off' in the context of activation versus effector function and lymph nodes versus peripheral tissues.
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Helical Lévy walks: Adjusting searching statistics to resource availability in microzooplankton
TL;DR: Experimental evidence of predicted optimal changes in the flight-time distribution of a predator's walk in response to gradual density changes of its moving prey is presented and the idea of universality of the statistical laws in optimal searching processes despite variations in the biological details of the organisms is supported.
Journal ArticleDOI
Visualizing dynamic microvillar search and stabilization during ligand detection by T cells
En Cai,Kyle Marchuk,Peter Beemiller,Casey Beppler,Matthew G. Rubashkin,Valerie M. Weaver,Audrey Gérard,Tsung-Li Liu,Bi-Chang Chen,Eric Betzig,Frederic Bartumeus,Matthew F. Krummel +11 more
TL;DR: The findings explain why many of the previously described components of the immunological synapse and T cell receptor signaling reside on three-dimensional microvillar-derived projections, and uncovered fractal organization of the microvilli, suggesting consistent coverage across scales.