HUJ MoveEcol Lab Israel_ Foraging search efficiency in white backed & lappet-faced vultures, Namibia (data from Spiegel et al. 2013)

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Date
2014-09-24
DOI
https://doi.org/10.5441/001/1.pr1vj29n/1
Authors
Citation
Spiegel O, Getz WM, Nathan R. 2014. HUJ MoveEcol Lab Israel_ Foraging search efficiency in white backed & lappet-faced vultures, Namibia (data from Spiegel et al. 2013). Movebank Data Repository. https://doi.org/10.5441/001/1.pr1vj29n/1
Abstract
NOTE: A corrected version of this dataset is available. See doi:10.5441/001/1.mf903197 at datarepository.movebank.org/handle/10255/move.401. ABSTRACT: The search phase is a critical component of foraging behavior, affecting interspecific competition and community dynamics. Nevertheless, factors determining interspecific variation in search efficiency are still poorly understood. We studied differences in search efficiency between the lappet-faced vulture (Torgos tracheliotus; LFV) and the white-backed vulture (Gyps africanus; WBV) foraging on spatiotemporally unpredictable carcasses in Etosha National Park, Namibia. We used experimental food supply and high-resolution GPS tracking of free-ranging vultures to quantify search efficiency and elucidate the factors underlying the observed interspecific differences using a biased correlated random walk simulation model bootstrapped with the GPS tracking data. We found that LFV’s search efficiency was higher than WBV’s in both first-to-find, first-to-land, and per-individual-finding rate measures. Modifying species-specific traits in the simulation model allows us to assess the relative role of each factor in LFV’s higher efficiency. Interspecific differences in morphology (through the effect on perceptual range and motion ability) and searchers’ spatial dispersion (due to different roost arrangements) are in correspondence with the empirically observed advantage of LFV over WBV searchers, whereas differences in other aspects of the movement patterns appear to play a minor role. Our results provide mechanistic explanations for interspecific variation in search efficiency for species using similar resources and foraging modes.
Keywords
animal tracking,Etosha National Park,Gyps africanus,interspecific competition,lappet-faced vulture,movement ecology,Namibia,optimal foraging,Torgos tracheliotus,vulture conservation,white-backed vulture
Taxa
Sensors
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DOIs of related Publications
URI
https://datarepository.movebank.org/handle/10255/move.393
BibTex
@misc{001/1_pr1vj29n/1,
  title = {HUJ MoveEcol Lab Israel_ Foraging search efficiency in white backed & lappet-faced vultures, Namibia (data from Spiegel et al. 2013)},
  author = {Spiegel, O and Getz, WM and Nathan, R},
  year = {2014},
  URL = {http://dx.doi.org/10.5441/001/1.pr1vj29n/1},
  doi = {doi:10.5441/001/1.pr1vj29n/1},
  publisher = {Movebank data repository}
}
RIS
TY  - DATA
ID  - doi:10.5441/001/1.pr1vj29n/1
T1  - HUJ MoveEcol Lab Israel_ Foraging search efficiency in white backed & lappet-faced vultures, Namibia (data from Spiegel et al. 2013)
AU  - Spiegel, Orr
AU  - Getz, Wayne M.
AU  - Nathan, Ran
Y1  - 2014/09/24
KW  - animal tracking
KW  - Etosha National Park
KW  - Gyps africanus
KW  - interspecific competition
KW  - lappet-faced vulture
KW  - movement ecology
KW  - Namibia
KW  - optimal foraging
KW  - Torgos tracheliotus
KW  - vulture conservation
KW  - white-backed vulture
KW  - Gyps africanus
KW  - Torgos tracheliotus
PB  - Movebank data repository
UR  - http://dx.doi.org/10.5441/001/1.pr1vj29n/1
DO  - doi:10.5441/001/1.pr1vj29n/1
ER  -
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