Data from: Landscape-dependent time versus energy optimisations in pelicans migrating through a large ecological barrier

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datacite.RelatedIdentifierhttps://doi.org/10.1111/1365-2435.13426
datacite.RelatedIdentifier.relatedIdentifierTypeDOI
datacite.RelatedIdentifier.relationTypeIsSupplementTo
dc.contributor.authorEfrat, Ron
dc.contributor.authorHatzofe, Ohad
dc.contributor.authorNathan, Ran
dc.date.accessioned2019-08-08T15:03:28Z
dc.date.available2019-08-08T15:03:28Z
dc.date.issued2019-08-08
dc.date.submitted2019
dc.description.abstract1. During migration, birds are often forced to cross ecological barriers, facing challenges due to scarcity of resources and suitable habitats. While crossing such barriers, birds are expected to adjust their behaviour to reduce time, energy expenditure and associated risks. 2. We studied the crossing of the Sahara Desert by the Great White Pelican (Pelecanus onocrotalus), a large wetland‐specialist. We focused on decisions made by migrating pelicans along different parts of the southbound autumn migration, their response to local environmental conditions, and the implications for time and energy optimisations. We compared the observed pelicans' migration routes with simulated “direct‐pass” (shortest, mostly across the desert) and “corridor‐pass” (along the Nile River) routes, and used GPS, body acceleration and atmospheric modelling to compare flight behaviour along the Nile River versus the desert. 3. The observed route was significantly shorter and faster than the simulated corridor‐pass route and not significantly different from the simulated direct‐pass one. Daily flights over the desert were longer than along the Nile River, with flying time extending to late hours of the day despite unfavourable atmospheric conditions for soaring‐gliding flight. Moreover, the pelicans behavioural response to atmospheric conditions changed according to the landscape over which they flew. Overall, the pelicans showed stronger behavioural adjustments to atmospheric conditions over the desert than along the Nile River. 4. Our findings suggest that migrating pelicans primarily acted as time minimisers while crossing the Sahara Desert, whereas energetic optimisation was only considered when it did not substantially compromise time optimisation. The pelicans took the almost shortest possible route, only following the Nile River along its south‐oriented parts, and frequently staged overnight in the desert far from water, despite being large, wet‐habitat specialists. Correspondingly, their behavioural response to atmospheric conditions changed according to the landscape over which they were flying, switching between time (over the desert) and energy (over the Nile River) optimisation strategies. Our results suggest that the interaction between landscape and atmospheric conditions depict a flexible, yet primarily time‐dominated, migration optimisation strategy.
dc.identifier.doidoi:10.5441/001/1.hs79pk45
dc.identifier.urihttps://datarepository.movebank.org/handle/10255/move.945
dc.language.isoeng
dc.relationFunctional Ecology
dc.relation.haspartdoi:10.5441/001/1.hs79pk45/1
dc.relation.haspartdoi:10.5441/001/1.hs79pk45/2
dc.relation.isreferencedbydoi:10.1111/1365-2435.13426
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/
dc.subjectPelecanus onocrotalus
dc.subjectanimal movement
dc.subjectanimal tracking
dc.subjectavian migration
dc.subjectbio-logging
dc.subjectenergy expenditure
dc.subjectgreat white pelican
dc.subjectmovement ecology
dc.subjectPelecanus onocrotalus
dc.subjectSahara Desert
dc.titleData from: Landscape-dependent time versus energy optimisations in pelicans migrating through a large ecological barrier
dc.typeArticle
dspace.entity.typeData package
dwc.ScientificNamePelecanus onocrotalus
mdr.animal.count18
mdr.citation.BibTex
@misc{001/1_hs79pk45,
  title = {Data from: Landscape-dependent time versus energy optimisations in pelicans migrating through a large ecological barrier},
  author = {Efrat, R and Hatzofe, O and Nathan, R},
  year = {2019},
  URL = {http://dx.doi.org/10.5441/001/1.hs79pk45},
  doi = {doi:10.5441/001/1.hs79pk45},
  publisher = {Movebank data repository}
}
mdr.citation.CSE
Efrat R, Hatzofe O, Nathan R. 2019. Data from: Landscape-dependent time versus energy optimisations in pelicans migrating through a large ecological barrier. Movebank Data Repository. https://doi.org/10.5441/001/1.hs79pk45
mdr.citation.RIS
TY  - DATA
ID  - doi:10.5441/001/1.hs79pk45
T1  - Data from: Landscape-dependent time versus energy optimisations in pelicans migrating through a large ecological barrier
AU  - Efrat, Ron
AU  - Hatzofe, Ohad
AU  - Nathan, Ran
Y1  - 2019/08/08
KW  - Pelecanus onocrotalus
KW  - accelerometer
KW  - animal movement
KW  - animal tracking
KW  - avian migration
KW  - bio-logging
KW  - energy expenditure
KW  - great white pelican
KW  - movement ecology
KW  - Pelecanus onocrotalus
KW  - Sahara Desert
KW  - Pelecanus onocrotalus
PB  - Movebank data repository
UR  - http://dx.doi.org/10.5441/001/1.hs79pk45
DO  - doi:10.5441/001/1.hs79pk45
ER  -
mdr.journal.titleFunctional Ecology
mdr.location.count111632
mdr.study.id914913822
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