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Foraging behaviour of common murres in the Baltic Sea, recorded by simultaneous attachment of GPS and time-depth recorder devices

2012; Inter-Research; Volume: 475; Linguagem: Inglês

10.3354/meps10125

1616-1599

Tom J. Evans, Martina Kadin, Olof Olsson, Susanne Åkesson,

Fish Ecology and Management Studies

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 475:277-289 (2013) - DOI: https://doi.org/10.3354/meps10125 Foraging behaviour of common murres in the Baltic Sea, recorded by simultaneous attachment of GPS and time-depth recorder devices Thomas J. Evans1,*, Martina Kadin2, Olof Olsson2, Susanne Åkesson1 1Centre for Animal Movement Research, Department of Biology, Lund University, Ecology Building, 22362 Lund, Sweden 2Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden *Email: tom.evans@biol.lu.se ABSTRACT: Global positioning system and time-depth recorders were deployed in combination to investigate the foraging behaviour of common murres Uria aalge breeding at Stora Karlsö Island, Baltic Sea, during the chick-rearing period. In the pre-breeding period the main prey species of murres, sprat Sprattus sprattus, is targeted by commercial fisheries, likely reducing prey availability during the breeding season. Foraging trips typically consisted of a short flight followed by a period sitting on the sea surface (0.39 ± 0.48 h), followed by several (5.3 ± 3.8) diving bouts interspersed by flights and water surface activity. Following the final diving bout, murres returned directly to the colony. Overnight foraging trips lasted longer than daytime trips, and that result corresponded with greater diving activity and reduced dive depths around dawn and dusk, likely times of high prey accessibility. High outward flight groundspeeds (20.0 ± 2.8 m s-1) were aided by tailwinds, and lower inward flight groundspeeds (15.1 ± 2.5 m s-1) were impeded by headwinds. Flights following the wind direction may reflect a strategy to reduce crosswind drift. Foraging intensity was lower than reported by most other studies of murres, suggesting more abundant or aggregated prey. KEY WORDS: Foraging behaviour · Diving behaviour · Uria aalge · Common murre · Wildlife telemetry · Data loggers · Baltic Sea Full text in pdf format Supplementary material PreviousNextCite this article as: Evans TJ, Kadin M, Olsson O, Åkesson S (2013) Foraging behaviour of common murres in the Baltic Sea, recorded by simultaneous attachment of GPS and time-depth recorder devices. Mar Ecol Prog Ser 475:277-289. https://doi.org/10.3354/meps10125 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 475. Online publication date: February 14, 2013 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2013 Inter-Research.