Calibrating passive acoustic monitoring: Correcting humpback whale call detections for site-specific and time-dependent environmental characteristics

TitleCalibrating passive acoustic monitoring: Correcting humpback whale call detections for site-specific and time-dependent environmental characteristics
Publication TypeJournal Article
Year of Publication2013
AuthorsHelble T.A, D'Spain G.L, Campbell G.S, Hildebrand JA
JournalJournal of the Acoustical Society of America
Volume134
PaginationEL400-EL406
Date Published2013/11
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000326640800004
Keywordscargo ship; radiated noise
Abstract

This paper demonstrates the importance of accounting for environmental effects on passive underwater acoustic monitoring results. The situation considered is the reduction in shipping off the California coast between 2008-2010 due to the recession and environmental legislation. The resulting variations in ocean noise change the probability of detecting marine mammal vocalizations. An acoustic model was used to calculate the time-varying probability of detecting humpback whale vocalizations under best-guess environmental conditions and varying noise. The uncorrected call counts suggest a diel pattern and an increase in calling over a two-year period; the corrected call counts show minimal evidence of these features. (C) 2013 Acoustical Society of America

DOI10.1121/1.4822319
Integrated Research Themes: 
Student Publication: 
No
sharknado