• norsk
    • English
  • norsk 
    • norsk
    • English
  • Logg inn
Vis innførsel 
  •   Hjem
  • Havforskningsinstituttet
  • Published in cooperation with others
  • ICES CM documents authored by IMR scientists (1949-2011)
  • Vis innførsel
  •   Hjem
  • Havforskningsinstituttet
  • Published in cooperation with others
  • ICES CM documents authored by IMR scientists (1949-2011)
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Extinction cross section of herring: New measurements and speculation

Foote, Kenneth G.
Working paper
Thumbnail
Åpne
CM_1994_BDGH_02.pdf (1.611Mb)
Permanent lenke
http://hdl.handle.net/11250/105255
Utgivelsesdato
1994
Metadata
Vis full innførsel
Samlinger
  • ICES CM documents authored by IMR scientists (1949-2011) [3139]
Originalversjon
This report is not to be cited without prior reference to the author  
Sammendrag
Acoustic abundance estimation of dense, vertically extended

aggregations of fish requires knowledge of the extinction cross section.

An established method based on a comparison of the area backscattering

coefficients of fish and underlying flat bottom is exercised for herring

in Ofotfjorden, January 1994, as observed with the SIMRAD EK500/38 kHz

scientific echo sounder and Bergen Echo Integrator. Variability in the

measurement results both for the present period and with respect to earlier

years is viewed in the light of the optical literature. This suggests

that the extinction cross section of finite but complicated physical

scatterers may be as sensitive to details of orientation as is the

backscattering cross section. The possibility of exploiting this property

is considered.
Utgiver
ICES
Serie
ICES CM Documents;1994/(B+D+G+H):2

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit
 

 

Bla i

Hele arkivetDelarkiv og samlingerUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifterDenne samlingenUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifter

Min side

Logg inn

Statistikk

Besøksstatistikk

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit