@article{fdi:010060327,
  title = {{E}nergetic consequences of contrasting winter migratory strategies in a sympatric {A}rctic seabird duet},
  author = {{F}ort, {J}. and {S}teen, {H}. and {S}trom, {H}. and {T}remblay, {Y}ann and {G}ronningsaeter, {E}. and {P}ettex, {E}. and {P}orter, {W}. {P}. and {G}remillet, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}t the onset of winter, warm-blooded animals inhabiting seasonal environments may remain resident and face poorer climatic conditions, or migrate towards more favourable habitats. {W}hile the origins and evolution of migratory choices have been extensively studied, their consequences on avian energy balance and winter survival are poorly understood, especially in species difficult to observe such as seabirds. {U}sing miniaturized geolocators, time-depth recorders and a mechanistic model, we investigated the migratory strategies, the activity levels and the energy expenditure of the closely-related, sympatrically breeding {B}runnich's guillemots {U}ria lomvia and common guillemots {U}ria aalge from {B}j{O}rn{O}ya, {S}valbard. {T}he two guillemot species from this region present contrasting migratory strategies and wintering quarters: {B}runnich's guillemots migrate across the {N}orth {A}tlantic to overwinter off southeast {G}reenland and {F}aroe {I}slands, while common guillemots remain resident in the {B}arents, the {N}orwegian and the {W}hite {S}eas. {R}esults show that both species display a marked behavioural plasticity to respond to environmental constraint, notably modulating their foraging effort and diving behaviour. {N}evertheless, we provide evidence that the migratory strategy adopted by guillemots can have important consequences for their energy balance. {O}verall energy expenditure estimated for the non-breeding season is relatively similar between both species, suggesting that both southward migration and high-arctic winter residency are energetically equivalent and suitable strategies. {H}owever, we also demonstrate that the migratory strategy adopted by {B}runnich's guillemots allows them to have reduced daily energy expenditures during the challenging winter period. {W}e therefore speculate that resident' common guillemots are more vulnerable than migrating' {B}runnich's guillemots to harsh winter environmental conditions.},
  keywords = {{ARCTIQUE}},
  booktitle = {},
  journal = {{J}ournal of {A}vian {B}iology},
  volume = {44},
  numero = {3},
  pages = {255--262},
  ISSN = {0908-8857},
  year = {2013},
  DOI = {10.1111/j.1600-048{X}.2012.00128.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060327},
}