Exposure to Seismic Survey Alters Blue Whale Acoustic Communication

Journal Article

Title: Exposure to Seismic Survey Alters Blue Whale Acoustic Communication
Publication Date:
February 23, 2010
Journal: Biology letters
Volume: 6
Issue: 1
Pages: 51-54
Publisher: The Royal Society
Stressor:

Document Access

Website: External Link
Attachment: Access File
(327 KB)

Citation

Di Iorio, L.; Clark, C. (2010). Exposure to Seismic Survey Alters Blue Whale Acoustic Communication. Biology letters, 6(1), 51-54.
Abstract: 

The ability to perceive biologically important sounds is critical to marine mammals, and acoustic disturbance through human-generated noise can interfere with their natural functions. Sounds from seismic surveys are intense and have peak frequency bands overlapping those used by baleen whales, but evidence of interference with baleen whale acoustic communication is sparse. Here we investigated whether blue whales (Balaenoptera musculus) changed their vocal behaviour during a seismic survey that deployed a low-medium power technology (sparker). We found that blue whales called consistently more on seismic exploration days than on non-exploration days as well as during periods within a seismic survey day when the sparker was operating. This increase was observed for the discrete, audible calls that are emitted during social encounters and feeding. This response presumably represents a compensatory behaviour to the elevated ambient noise from seismic survey operations.

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