Non-invasive measurement of fillet composition of four freshwater fish species by computer tomography

R. Romvári, Cs Hancz, Zs Petrási, T. Molnár, P. Horn

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The crude fat and crude protein content of fillets was predicted by X-ray computer tomography (CT) and determined by chemical analyses. Between 20 to 40 serial scans were taken of 48 freshwater fish and samples from the ground fillet with skin were prepared for chemical analysis. Fish species investigated were as follows: common carp (n = 18), grass carp (n = 10), silver carp (n = 10) and pike-perch (n = 10), all collected directly from fishponds and processed immediately. The variables of the prediction equations were taken from the density values of the Hounsfield scale, on a range between -90 and +150, by summing the frequencies within each interval of 10 values. With principal component analysis fillet fat and crude protein content could be estimated with R2 = 0.88 and R2 = 0.87 accuracy, respectively. Three dimensional "volumetric" estimation of fat tissue was also carried out on the basis of fat indices developed at our lab. The fillet composition of the Cyprinid species could be evaluated well with the applied methods, but not that of pike-perch which had an extremely low fillet and body fat content.

Original languageEnglish
Pages (from-to)231-240
Number of pages10
JournalAquaculture International
Volume10
Issue number3
DOIs
Publication statusPublished - 2002

Fingerprint

tomography
fillets
freshwater fish
fat
fish
Sander lucioperca
lipids
crude protein
protein content
Hypophthalmichthys molitrix
Ctenopharyngodon idella
protein
cyprinid
Cyprinus carpio
skin (animal)
chemical analysis
body fat
silver
skin
principal component analysis

Keywords

  • Computer tomography
  • Fillet composition
  • Freshwater fish

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Non-invasive measurement of fillet composition of four freshwater fish species by computer tomography. / Romvári, R.; Hancz, Cs; Petrási, Zs; Molnár, T.; Horn, P.

In: Aquaculture International, Vol. 10, No. 3, 2002, p. 231-240.

Research output: Contribution to journalArticle

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