Movement data

Bastille-Rousseau G, Yackulic CB, Frair JL, Cabrera F, Blake S. 2016. Movement data. Movebank Data Repository.
(1) Understanding how individual movement scales with body size is of fundamental importance in predicting ecological relationships for diverse species. One-dimensional movement metrics scale consistently with body size yet vary over different temporal scales. Knowing how temporal scale influences the relationship between animal body size and movement would better inform hypotheses about the efficiency of foraging behaviour, the ontogeny of energy budgets, and numerous life history trade-offs. (2) We investigated how the temporal scaling of allometric patterns in movement vary over the course of a year, specifically during periods of motivated (directional and fast movement) and unmotivated (stationary and tortuous movement) behaviour. We focused on a recently diverged group of species that displays wide variation in movement behaviour—giant Galapagos tortoises (Chelonoidis spp.)—to test how movement metrics estimated on a monthly basis scaled with body size. (3) We used state-space modelling to estimate seven different movement metrics of Galapagos tortoises. We used log-log regression of the power law to evaluate allometric scaling for these movement metrics, and contrasted relationships by species and sex. (4) Allometric scaling of movement was more apparent during motivated periods of movement. During this period, allometry was revealed at multiple temporal intervals (hourly, daily, and monthly), with values observed at daily and monthly intervals corresponding most closely to the expected ¼ scaling coefficient, albeit with wide credible intervals. We further detected differences in the magnitude of scaling among taxa uncoupled from observed differences in the temporal structuring of their movement rates. (5) Our results indicate that the definition of temporal scales is fundamental to the detection of allometry of movement, and should be given more attention in movement studies. Our approach not only provides new conceptual insights into temporal attributes in one-dimensional scaling of movement, but also generates valuable insights into the movement ecology of iconic yet poorly understood Galapagos giant tortoises.
animal movement,animal tracking,Chelonoidis donfaustoi,Chelonoidis hoodensis,Chelonoidis porteri,Chelonoidis vandenburghi,correlated random walk,directional persistence,displacement,ectotherm,Galapagos,giant tortoise,interval,temporal scale
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DOIs of related Publications
  title = {Movement data},
  author = {Bastille-Rousseau, G and Yackulic, CB and Frair, JL and Cabrera, F and Blake, S},
  year = {2016},
  URL = {},
  doi = {doi:10.5441/001/1.2cp86266/3},
  publisher = {Movebank data repository}
ID  - doi:10.5441/001/1.2cp86266/3
T1  - Movement data
AU  - Bastille-Rousseau, Guillaume
AU  - Yackulic, Charles B.
AU  - Frair, Jacqueline L.
AU  - Cabrera, Freddy
AU  - Blake, Stephen
Y1  - 2016/06/29
KW  - animal movement
KW  - animal tracking
KW  - Chelonoidis donfaustoi
KW  - Chelonoidis hoodensis
KW  - Chelonoidis porteri
KW  - Chelonoidis vandenburghi
KW  - correlated random walk
KW  - directional persistence
KW  - displacement
KW  - ectotherm
KW  - Galapagos
KW  - giant tortoise
KW  - interval
KW  - temporal scale
KW  - Chelonoidis donfaustoi
KW  - Chelonoidis hoodensis
KW  - Chelonoidis porteri
KW  - Chelonoidis vandenburghi
PB  - Movebank data repository
UR  -
DO  - doi:10.5441/001/1.2cp86266/3
ER  -