Results 11 to 20 of about 202,210 (324)
Implications for welfare, productivity and sustainability of the variation in reported levels of mortality for laying hen flocks kept in different housing systems: A meta-analysis of ten studies [PDF]
PLoS ONE, 2016 Data from ten sources comprising 3,851 flocks were modelled to identify variation in levels of mortality in laying hens. The predicted increase with age was curvilinear with significant variation between the seven breed categories. Mortality was higher
Lambton, Sarah L. +2 more
core +6 more sources
The Role of Projection in the Control of Bird Flocks [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2014 Swarming is a conspicuous behavioural trait observed in bird flocks, fish shoals, insect swarms and mammal herds. It is thought to improve collective awareness and offer protection from predators.
Miller, A. M. +3 more
core +2 more sources
Emergence of collective changes in travel direction of starling flocks from individual birds fluctuations [PDF]
Journal of the Royal Society Interface, 2014 One of the most impressive features of moving animal groups is their ability to perform sudden coherent changes in travel direction. While this collective decision can be a response to an external perturbation, such as the presence of a predator, recent ...
Attanasi, Alessandro +9 more
core +2 more sources
Self-organization of collective escape in pigeon flocks
bioRxiv, 2021 Bird flocks under predation demonstrate complex patterns of collective escape. These patterns may emerge by self-organization from simple interactions among group-members. Computational models have been shown to be valuable for identifying the behavioral
Marina Papadopoulou +4 more
semanticscholar +1 more source
Flocks, herds, and schools: A quantitative theory of flocking [PDF]
, 1998 We present a quantitative continuum theory of ``flocking'': the collective coherent motion of large numbers of self-propelled organisms. In agreement with everyday experience, our model predicts the existence of an ``ordered phase'' of flocks, in which ...
J. Toner, Y. Tu
semanticscholar +1 more source
, 2014 Experiments find coherent information transfer through biological groups on length and time scales distinctly below those on which asymptotically correct hydrodynamic theories apply.
Cavagna, Andrea +6 more
core +3 more sources
A method for estimating the position and direction of a leader of a set of moving objects
Revista Facultad de Ingeniería Universidad de Antioquia, 2012 Movement patterns can be identified when studying a group of moving entities such as a group of people, a flock of birds, a school of fish, a convoy of vehicles, among others. In this paper, it is analyzed a pattern, known as leadership.
Francisco Javier Moreno Arboleda +2 more
doaj +1 more source
Flocking with Obstacle Avoidance [PDF]
, 2003 In this paper, we provide a dynamic graph theoretical framework for flocking in presence of multiple obstacles. In particular, we give formal definitions of nets and flocks as spatially induced graphs. We provide models of nets and flocks and discuss the
Olfati-Saber, Dr. Reza
core +4 more sources
Salmonella control in poultry flocks and its public health impact
EFSA journal. European Food Safety Authority, 2019 An increase in confirmed human salmonellosis cases in the EU after 2014 triggered investigation of contributory factors and control options in poultry production.
K. Koutsoumanis +24 more
semanticscholar +1 more source
Distortion and destruction of colloidal flocks in disordered environments [PDF]
Nature Physics, 2016 Our understanding of collective animal behaviour generally assumes that flocks and herds move through homogeneous environments. Colloidal experiments suggest that flocking can be distorted or even suppressed by the introduction of disorder. How do flocks,
A. Morin +3 more
semanticscholar +1 more source