A hybrid approach to acoustic classification and length estimation of krill (Articolo in rivista)

Type
Label
  • A hybrid approach to acoustic classification and length estimation of krill (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Azzali M., Leonori I., Lanciani G. (2004)
    A hybrid approach to acoustic classification and length estimation of krill
    in CCAMLR science
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Azzali M., Leonori I., Lanciani G. (literal)
Pagina inizio
  • 33 (literal)
Pagina fine
  • 58 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.ccamlr.org/pu/e/e_pubs/cs/intro.htm (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 11 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Scienze Marine ISMAR-CNR Sezione Pesca Marittima – Ancona Largo Fiera della Pesca, I-60125 Ancona, Italy (literal)
Titolo
  • A hybrid approach to acoustic classification and length estimation of krill (literal)
Abstract
  • The problem of acoustically identifying and estimating the sizes of two euphausiid species is considered. A euphausiid aggregation is represented by a three-dimensional probabilistic vector whose components are the mean ratios of the volume backscattering coeffi cients, measured at two different frequencies. The decisions on the species and the relative misclassifi cation errors are calculated individually for each component of a vector, using classical Bayesian techniques. Classification probabilities are derived by integrating the individual decisions. The size structure of the classifi ed aggregation is derived from a fluid-sphere model. The effectiveness of the method is demonstrated by comparing the acoustic estimates of species and sizes to net samples collected during three surveys conducted in the Ross Sea under various environmental conditions. (literal)
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