Document Detail


Energy: converting from acoustic to biological resource units.
MedLine Citation:
PMID:  12051427     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Acoustic backscattering strength is often used as an index of biomass; however, the relationship between these variables has not been directly validated. Relationships were investigated between acoustic cross section at 200 kHz, measured as part of a previous study, and measured values of length, biovolume, dry weight, ash-free dry weight, and caloric content of the same individual specimens. Animals were part of the Hawaiian mesopelagic boundary community and included shrimps, squids, and myctophid fishes. The strong relationships found between all the variables measured make it possible to approximate any one variable from the measured values of others within a class of animals. The data show that for these midwater animals, acoustic scattering can be used as an index of biomass. Dorsal-aspect acoustic cross section at 200 kHz predicted dry weight and ash-free dry weight at least as well as did body length, a standard predictor. Dorsal-aspect acoustic cross section at 200 kHz was also a strong predictor of total caloric content. The relationship between dorsal-aspect acoustic cross section and caloric content of Hawaiian mesopelagic animals was linear and additive. Consequently, it is possible to directly convert acoustic energy from these animals to organic resource units without having knowledge of the size distribution of the populations being studied.
Authors:
Kelly J Benoit-Bird; Whitlow W L Au
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  111     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-06-07     Completed Date:  2002-07-03     Revised Date:  2006-12-27    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2070-5     Citation Subset:  IM    
Affiliation:
Hawaii Institute of Marine Biology, Kailua 96734, USA. benoit@hawaii.edu
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MeSH Terms
Descriptor/Qualifier:
Acoustics*
Animals
Biomass
Energy Transfer / physiology*

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


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