Behavior of Scandinavian Bats During Migration and Foraging at Sea

Journal Article

Title: Behavior of Scandinavian Bats During Migration and Foraging at Sea
Publication Date:
December 15, 2009
Journal: Journal of Mammology
Volume: 90
Issue: 6
Pages: 1318-1323
Publisher: American Society of Mammologists
Receptor:

Document Access

Website: External Link

Citation

Ahlén, I.; Baagøe, H.; Bach, L. (2009). Behavior of Scandinavian Bats During Migration and Foraging at Sea. Journal of Mammology, 90(6), 1318-1323.
Abstract: 

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. Key words

Find Tethys on InstagramFind Tethys on FacebookFind Tethys on Twitter
 
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.