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Behavior of Scandin...
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Ahlén, IngemarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology
(author)
Behavior of Scandinavian bats during migration and foraging at sea
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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2009
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Oxford University Press (OUP): Policy B - Oxford Open Option B,2024
Numbers
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LIBRIS-ID:oai:slubar.slu.se:27203
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https://res.slu.se/id/publ/27203URI
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https://doi.org/10.1644/09-MAMM-S-223R.1DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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We studied bats migrating and foraging over the sea by direct observations and automatic acoustic recording We recorded 11 species (of a community of 18 species) flying over the ocean up to 14 km from the shore. All bats used sonar during migration flights at sea, often with slightly lower frequencies and longer pulse intervals compared to those used over land. The altitude used for migration flight was most often < 10 m above sea level. Bats must use other sensory systems for long-distance navigation, but they probably use echoes from the water surface to orient to the immediate surroundings. Both migrant and resident bats foraged over the sea in areas with an abundance of insects in the air and crustaceans in the surface waters. When hunting insects near vertical objects such as lighthouses and wind turbines, bats rapidly changed altitude, for example, to forage around turbine blades. The findings illustrate why and how bats might be exposed to additional mortality by offshore wind power.
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Sveriges lantbruksuniversitetInstitutionen för ekologi
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Related titles
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In:Journal of Mammalogy90, s. 1318-13230022-23721545-1542
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