Galapagos Tortoise Movement Ecology Programme_2009-2018-reference-data

Bastille-Rousseau G, Yackulic CB, Gibbs J, Frair JL, Cabrera F, Blake S. 2019. Galapagos Tortoise Movement Ecology Programme_2009-2018-reference-data. Movebank Data Repository.
To understand how migratory behavior evolved and to predict how migratory species will respond to global environmental change it is important to quantify the fitness consequences of intra- and inter-individual variation in migratory behavior. Intra-individual variation includes behavioral responses to changing environmental conditions and hence behavioral plasticity in the context of novel or variable conditions. Inter-individual variation determines the degree of variation on which selection can act and the rate of evolutionary responses to changes in average and extreme environmental conditions. Here we focus on variation in the partial migratory behavior of giant Galápagos tortoises (Chelonoidis spp.) and its energetic consequences. We evaluate the extent and mechanisms by which tortoises adjust migration timing in response to varying annual environmental conditions, and integrate movement data within a bioenergetic model of tortoise migration to quantify the fitness consequences of migration timing. We find strong inter-individual variation in the timing of migration, which was not affected by environmental conditions prevailing at the time of migration but rather by average expectations estimated from multi-annual averaged conditions. This variation is associated with an average annual loss in efficiency of ~15% relative to optimal timing based on year-specific conditions. These results point towards a limited ability of tortoises to adjust the timing of their migrations based on prevailing (and, by extension, future) conditions, suggesting that the adaptability of tortoise migratory behavior to changing conditions is predicated more by past “normal” conditions than responses to prevailing, changing conditions. Our work offers insights into the level of environmental-tuning in migratory behavior and a general framework for future research across taxa.
adaptation,animal movement,animal tracking,Chelonoidis donfaustoi,Chelonoidis hoodensis,Chelonoidis porteri,Chelonoidis vandenburghi,ectotherm,Galapagos,giant tortoise,plasticity
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  title = {Galapagos Tortoise Movement Ecology Programme_2009-2018-reference-data},
  author = {Bastille-Rousseau, G and Yackulic, CB and Gibbs, J and Frair, JL and Cabrera, F and Blake, S},
  year = {2019},
  URL = {},
  doi = {doi:10.5441/001/1.6gr485fk/2},
  publisher = {Movebank data repository}
ID  - doi:10.5441/001/1.6gr485fk/2
T1  - Galapagos Tortoise Movement Ecology Programme_2009-2018-reference-data
AU  - Bastille-Rousseau, Guillaume
AU  - Yackulic, Charles B.
AU  - Gibbs, James
AU  - Frair, Jacqueline L.
AU  - Cabrera, Freddy
AU  - Blake, Stephen
Y1  - 2019/03/08
KW  - adaptation
KW  - animal movement
KW  - animal tracking
KW  - Chelonoidis donfaustoi
KW  - Chelonoidis hoodensis
KW  - Chelonoidis porteri
KW  - Chelonoidis vandenburghi
KW  - ectotherm
KW  - Galapagos
KW  - giant tortoise
KW  - plasticity
KW  - Chelonoidis donfaustoi
KW  - Chelonoidis hoodensis
KW  - Chelonoidis porteri
KW  - Chelonoidis vandenburghi
PB  - Movebank data repository
UR  -
DO  - doi:10.5441/001/1.6gr485fk/2
ER  -