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Modelling the movement of a soil insect

Wiktorsson, Magnus LU ; Rydén, Tobias LU ; Nilsson, Elna LU and Bengtsson, Göran LU (2004) In Journal of Theoretical Biology 231(4). p.497-513
Abstract
We use a linear autoregressive model to describe the movement of a soil-living insect, Protaphorura armata (Collembola). Models of this kind can be viewed as extensions of a random walk, but unlike a correlated random walk, in which the speed and turning angles are independent, our model identifies and expresses the correlations between the turning angles and a variable speed. Our model uses data in x- and y-coordinates rather than in polar coordinates, which is useful for situations in which the resolution of the observations is limited. The movement of the insect was characterized by (i) looping behaviour due to autocorrelation and cross correlation in the velocity process and (ii) occurrence of periods of inactivity, which we describe... (More)
We use a linear autoregressive model to describe the movement of a soil-living insect, Protaphorura armata (Collembola). Models of this kind can be viewed as extensions of a random walk, but unlike a correlated random walk, in which the speed and turning angles are independent, our model identifies and expresses the correlations between the turning angles and a variable speed. Our model uses data in x- and y-coordinates rather than in polar coordinates, which is useful for situations in which the resolution of the observations is limited. The movement of the insect was characterized by (i) looping behaviour due to autocorrelation and cross correlation in the velocity process and (ii) occurrence of periods of inactivity, which we describe with a Poisson random effects model. We also introduce obstacles to the environment to add structural heterogeneity to the movement process. We compare aspects such as loop shape, inter-loop time, holding angles at obstacles, net squared displacement, number, and duration of inactive periods between observed and predicted movement. The comparison demonstrates that our approach is relevant as a starting-point to predict behaviourally complex moving, e.g. systematic searching, in a heterogeneous landscape. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Theoretical Biology
volume
231
issue
4
pages
497 - 513
publisher
Academic Press
external identifiers
  • wos:000225377400004
  • pmid:15488527
  • scopus:4544356295
ISSN
1095-8541
DOI
10.1016/j.jtbi.2004.06.024
language
English
LU publication?
yes
id
7fa74fbe-9b97-4fef-a8b1-f20669fb3c6a (old id 146180)
date added to LUP
2007-06-27 14:45:27
date last changed
2017-01-01 04:39:30
@article{7fa74fbe-9b97-4fef-a8b1-f20669fb3c6a,
  abstract     = {We use a linear autoregressive model to describe the movement of a soil-living insect, Protaphorura armata (Collembola). Models of this kind can be viewed as extensions of a random walk, but unlike a correlated random walk, in which the speed and turning angles are independent, our model identifies and expresses the correlations between the turning angles and a variable speed. Our model uses data in x- and y-coordinates rather than in polar coordinates, which is useful for situations in which the resolution of the observations is limited. The movement of the insect was characterized by (i) looping behaviour due to autocorrelation and cross correlation in the velocity process and (ii) occurrence of periods of inactivity, which we describe with a Poisson random effects model. We also introduce obstacles to the environment to add structural heterogeneity to the movement process. We compare aspects such as loop shape, inter-loop time, holding angles at obstacles, net squared displacement, number, and duration of inactive periods between observed and predicted movement. The comparison demonstrates that our approach is relevant as a starting-point to predict behaviourally complex moving, e.g. systematic searching, in a heterogeneous landscape. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Wiktorsson, Magnus and Rydén, Tobias and Nilsson, Elna and Bengtsson, Göran},
  issn         = {1095-8541},
  language     = {eng},
  number       = {4},
  pages        = {497--513},
  publisher    = {Academic Press},
  series       = {Journal of Theoretical Biology},
  title        = {Modelling the movement of a soil insect},
  url          = {http://dx.doi.org/10.1016/j.jtbi.2004.06.024},
  volume       = {231},
  year         = {2004},
}