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Seabird migration strategies: Flight budgets, diel activity patterns, and lunar influence
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Orientador(es)
Resumo(s)
Every year, billions of birds undertake extensive migrations between breeding and nonbreeding
areas, facing challenges that require behavioural adjustments, particularly to
flight timing and duration. Such adjustments in daily activity patterns and the influence
of extrinsic factors (e.g., environmental conditions, moonlight) have received much
more research attention in terrestrial than marine migrants. Taking advantage of the
widespread deployment in recent decades of combined light-level geolocator-immersion
loggers, we investigated diel organisation and influence of the moon on flight activities
during the non-breeding season of 21 migrant seabird species from a wide taxonomic
range (6 families, 3 orders). Migrant seabirds regularly stopped (to either feed or rest) migration, unlike some terrestrial and wetland birds which fly non-stop. We found
an overall increase for most seabird species in time in flight and, for several species, also
in flight bout duration, during migration compared to when resident at the non-breeding
grounds. Additionally, several nocturnal species spent more of the day in flight during
migration than at non-breeding areas, and vice versa for diurnal species. Nocturnal time
in flight tended to increase during full moon, both during migration and at the nonbreeding
grounds, depending on species. Our study provides an extensive overview
of activity patterns of migrant seabirds, paving the way for further research on the
underlying mechanisms and drivers.
Descrição
Palavras-chave
Bird migration Ecological barriers Nocturnality Migratory behaviour Moon phases Transequatorial migrants
Contexto Educativo
Citação
Anne-Sophie Bonnet-Lebrun, Maria P. Dias, Richard A. Phillips, José P. Granadeiro, M. de L. Brooke, Olivier Chastel, Thomas A. Clay, Annette L. Fayet, Olivier Gilg, Jacob González-Solís, Tim Guilford, Sveinn A. Hanssen, April Hedd, Audrey Jaeger, Johannes Krietsch, Johannes Lang, Matthieu Le Corre, Teresa Militão, Børge Moe, … Paulo Catry. (2021). Seabird Migration Strategies: Flight Budgets, Diel Activity Patterns, and Lunar Influence. Frontiers in Marine Science, 8. https://doi.org/10.3389/fmars.2021.683071
Editora
22967745