Document Detail


Acoustically invisible feeding blue whales in Northern Icelandic waters.
MedLine Citation:
PMID:  25096128     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Fixed passive acoustic monitoring can be used for long-term recording of vocalizing cetaceans. Both presence monitoring and animal density estimation requires the call rates and sound source levels of vocalizations produced by single animals. In this study, blue whale calls were recorded using acoustic bio-logging systems in Skjálfandi Bay off Húsavík, Northeast Iceland, in June 2012. An accelerometer was attached to individual whales to monitor diving behavior. During 21 h recording two individuals, 8 h 45 min and 13 h 2 min, respectively, 105 and 104 lunge feeding events and four calls were recorded. All recorded calls were down-sweep calls ranging from 105 to 48 Hz. The sound duration was 1-2 s. The source level was estimated to be between 158 and 169 dB re 1μPa rms, assuming spherical sound propagation from the possible sound source location to the tag. The observed sound production rates and source levels of individual blue whales during feeding were extremely small compared with those observed previously in breeding grounds. The feeding whales were nearly acoustically invisible. The function of calls during feeding remains unknown.
Authors:
Tomonari Akamatsu; Marianne Helene Rasmussen; Maria Iversen
Related Documents :
21727508 - Two-dimensional stick-slip on a soft elastic polymer: pattern generation using atomic f...
21965188 - The long head of the biceps tendon has minimal effect on in vivo glenohumeral kinematic...
3418318 - Dynamic relationship between the slow potential and spikes in cockroach ocellar neurons.
12402288 - Wave properties of action potentials from fast and slow motor units of rats.
22996728 - Point-of-care colorimetric detection with a smartphone.
24374058 - Particular adaptations to potentially slippery surfaces: the effects of friction on con...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  136     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-08-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  939     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Discriminating between the vocalizations of Indo-Pacific humpback and Australian snubfin dolphins in...
Next Document:  Enhanced directivity with array gratings.