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Articles, 9 records found
Articles 9 records found  
1.
12 p, 770.4 KB Active and reactive behaviour in human mobility : the influence of attraction points on pedestrians / Gutiérrez Roig, M. (Universitat de Barcelona. Departament de Física Fonamental) ; Sagarra, O. (Universitat de Barcelona. Departament de Física Fonamental) ; Oltra, Aitana (Institució Catalana de Recerca i Estudis Avançats) ; Palmer, John R. B. (Centre de Recerca Ecològica i Aplicacions Forestals) ; Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals) ; Díaz Guilera, A. (Universitat de Barcelona. Departament de Física Fonamental) ; Perelló, J. (Universitat de Barcelona. Departament de Física Fonamental)
Human mobility is becoming an accessible field of study, thanks to the progress and availability of tracking technologies as a common feature of smart phones. We describe an example of a scalable experiment exploiting these circumstances at a public, outdoor fair in Barcelona (Spain). [...]
2016 - 10.1098/rsos.160177
Royal Society open science, Vol. 3, issue 7 (July 2016)  
2.
7 p, 657.5 KB Signatures of chaos in animal search patterns / Reynolds, Andy M. (Rothamsted Research, Harpenden) ; Koppel, J. van de (Rijksuniversiteit Groningen. Groningen Institute for Evolutionary Life) ; Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals) ; Kölzsch, Andrea (Max Planck Institute for Ornithology)
One key objective of the emerging discipline of movement ecology is to link animal movement patterns to underlying biological processes, including those operating at the neurobiological level. Nonetheless, little is known about the physiological basis of animal movement patterns, and the underlying search behaviour. [...]
2016 - 10.1038/srep23492
Scientific Reports, Vol. 6 (2016) , art. 23492  
3.
13 p, 863.3 KB Early-life foraging : behavioral responses of newly fledged albatrosses to environmental conditions / Grissac, Sophie de (Centre national de la recherche scientifique (França). Centre d'Etudes Biologiques de Chizé) ; Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals) ; Cox, Sam L. (Centre national de la recherche scientifique (França). Centre d'Etudes Biologiques de Chizé) ; Weimerskirch, Henri (Centre national de la recherche scientifique (França). Centre d'Etudes Biologiques de Chizé)
In order to survive and later recruit into a population, juvenile animals need to acquire resources through the use of innate and/or learnt behaviors in an environment new to them. For far-ranging marine species, such as the wandering albatross Diomedea exulans, this is particularly challenging as individuals need to be able to rapidly adapt and optimize their movement strategies in response to the highly dynamic and heterogeneous nature of their open-ocean pelagic habitats. [...]
2017 - 10.1002/ece3.3210
Ecology and evolution, Vol. 7, issue 17 (2017) , p. 6766-6778  
4.
11 p, 1.1 MB Stochastic optimal foraging : tuning intensive and extensive dynamics in random searches / Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals) ; Raposo, Ernesto P. (Universidade Federal de Pernambuco. Departamento de Fisica) ; Viswanathan, Gandhimohan M. (Universidade do Estado do Rio Grande do Norte (Brasil). Departamento de Física Teórica e Experimental) ; Luz, Marcos G. E. da (Universidade Federal do Paraná. Departamento de Física)
Recent theoretical developments had laid down the proper mathematical means to understand how the structural complexity of search patterns may improve foraging efficiency. Under information-deprived scenarios and specific landscape configurations, Lévy walks and flights are known to lead to high search efficiencies. [...]
2014 - 10.1371/journal.pone.0106373
Plos One, Vol. 9, issue 9 (Set. 2014) , e106373  
5.
26 p, 3.2 MB Expectation-maximization binary clustering for behavioural annotation / Garriga, Joan (Institució Catalana de Recerca i Estudis Avançats) ; Palmer, John R. B. (Centre de Recerca Ecològica i Aplicacions Forestals) ; Oltra, Aitana (Institució Catalana de Recerca i Estudis Avançats) ; Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals)
The growing capacity to process and store animal tracks has spurred the development of new methods to segment animal trajectories into elementary units of movement. Key challenges for movement trajectory segmentation are to (i) minimize the need of supervision, (ii) reduce computational costs, (iii) minimize the need of prior assumptions (e. [...]
2016 - 10.1371/journal.pone.0151984
Plos One, Vol. 11, issue 3 (2016) , e151984  
6.
19 p, 4.1 MB Ordinary and extraordinary movement behaviour of small resident fish within a Mediterranean marine protected area / Aspillaga, Eneko (Universitat de Barcelona. Departament d'Ecologia) ; Bartumeus, Frederic (Centre de Recerca Ecològica i Aplicacions Forestals) ; Linares, Cristina (Universitat de Barcelona. Departament d'Ecologia) ; Starr, Richard M. (California State University. Moss Landing Marine Laboratories) ; López Sanz, Àngel (Institut de Ciències del Mar) ; Díaz, David (Centre Oceanogràfic de les Balears) ; Zabala, Mikel (Universitat de Barcelona. Departament d'Ecologia) ; Hereu, Bernat (Universitat de Barcelona. Departament d'Ecologia)
It is important to account for the movement behaviour of fishes when designing effective marine protected areas (MPAs). Fish movements occur across different spatial and temporal scales and understanding the variety of movements is essential to make correct management decisions. [...]
2016 - 10.1371/journal.pone.0159813
Plos One, Vol. 11, Issue 7 (July 2016) , e0159813  
7.
9 p, 785.0 KB Search times with arbitrary detection constraints / Campos, Daniel (Universitat Autònoma de Barcelona. Departament de Física) ; Bartumeus, Frederic (Centre d'Estudis Avançats de Blanes) ; Méndez López, Vicenç (Universitat Autònoma de Barcelona. Departament de Física)
Random encounters in space are central to describing diffusion-limited reactions, animal foraging, search processes, and many other situations in nature. These encounters, however, are often constrained by the capacity of the searcher to detect and/or recognize its target. [...]
2013 - 10.1103/PhysRevE.88.022101
Physical review. E : statistical, nonlinear, and soft matter physics, Vol. 88, Number 2 (August 2013) , p. 022101/1-022101/9  
8.
4 p, 324.9 KB Optimal intermittence in search strategies under speed-selective target detection / Campos, Daniel (Universitat Autònoma de Barcelona. Departament de Física) ; Méndez López, Vicenç (Universitat Autònoma de Barcelona. Departament de Física) ; Bartumeus, Frederic (Centre d'Estudis Avançats de Blanes) ; American Physical Society
Random search theory has been previously explored for both continuous and intermittent scanning modes with full target detection capacity. Here we present a new class of random search problems in which a single searcher performs flights of random velocities, the detection probability when it passes over a target location being conditioned to the searcher speed. [...]
2012 - 10.1103/PhysRevLett.108.028102
Physical review letters, Vol. 108, Issue 2 (January 2012) , p. 28102  
9.
33 p, 792.0 KB High mountain lakes : extreme habitats and witnesses of environmental changes / Catalan, Jordi ; Camarero, Lluís ; Felip, Marisol ; Pla, Sergi ; Ventura, Marc ; Buchaca, Teresa ; Bartumeus, Frederic ; Mendoza, Guillermo de ; Miró, Alexandre ; Casamayor, Emilio O. ; Medina-Sánchez, Juan Manuel ; Bacardit, Montserrat ; Altuna, Maddi ; Bartrons Vilamala, Mireia ; Quijano, Daniel Díaz de
High mountain lakes offer research opportunities beyond what could be expected from their quantitative relevance in the Earth system. In this article we present a brief summary of the research carried out in the lakes of the Pyrenees in the last twenty years by the group of limnology of the Centre for High Mountain Research (CRAM) of the University of Barcelona. [...]
Los lagos de montaña ofrecen oportunidades de estudio que van mucho más allá de lo que su disposición en el territorio y abundancia pudieran sugerir. En este artículo presentamos un breve resumen de los temas que hemos abordado a lo largo de poco más de veinte años de investigación en los lagos de los Pirineos por parte del grupo de limnología del Centro de Investigaciones de Alta Montaña (CRAM) de la Universidad de Barcelona. [...]

2006
Limnética, V. 25 n. 1-2 (2006) p. 551-584  

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