Cristin-resultat-ID: 1151409
Sist endret: 15. februar 2019, 10:18
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Discrimination between weaned and unweaned atlantic cod (Gadus morhua) in capture-based aquaculture (CBA) by X-ray imaging and radio-frequency metal detector

Bidragsytere:
  • Ekrem Misimi
  • Svein Martinsen
  • John Reidar Bartle Mathiassen og
  • Ulf Gøran Erikson

Tidsskrift

PLOS ONE
ISSN 1932-6203
e-ISSN 1932-6203
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Publisert online: 2014
Trykket: 2014
Volum: 9
Hefte: 4
Open Access

Importkilder

Scopus-ID: 2-s2.0-84899718442

Beskrivelse Beskrivelse

Tittel

Discrimination between weaned and unweaned atlantic cod (Gadus morhua) in capture-based aquaculture (CBA) by X-ray imaging and radio-frequency metal detector

Sammendrag

The aim of this study was to investigate the feasibility of two detection methods for use in discrimination and sorting of adult Atlantic cod (about 2 kg) in the small scale capture-based aquaculture (CBA). Presently, there is no established method for discrimination of weaned and unweaned cod in CBA. Generally, 60–70% of the wild-caught cod in the CBA are weaned into commercial dry feed. To increase profitability for the fish farmers, unweaned cod must be separated from the stock, meaning the fish must be sorted into two groups – unweaned and weaned from moist feed. The challenges with handling of large numbers of fish in cages, defined the limits of the applied technology. As a result, a working model was established, focusing on implementing different marking materials added to the fish feed, and different technology for detecting the feed presence in the fish gut. X-ray imaging in two modes (planar and dual energy band) and sensitive radio-frequency metal detection were the detection methods that were chosen for the investigations. Both methods were tested in laboratory conditions using dead fish with marked feed inserted into the gut cavity. In particular, the sensitive radio-frequency metal detection method with carbonyl powder showed very promising results in detection of marked feed. Results show also that Dual energy band X-ray imaging may have potential for prediction of fat content in the feed. Based on the investigations it can be concluded that both X-ray imaging and sensitive radio-frequency metal detector technology have the potential for detecting cod having consumed marked feed. These are all technologies that may be adapted to large scale handling of fish from fish cages. Thus, it may be possible to discriminate between unweaned and weaned cod in a large scale grading situation. Based on the results of this study, a suggestion for evaluation of concept for in-situ sorting system is presented.

Bidragsytere

Ekrem Misimi

  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean

Svein Martinsen

  • Tilknyttet:
    Forfatter
    ved Havbruk ved SINTEF Ocean
  • Tilknyttet:
    Forfatter
    ved Diverse norske bedrifter og organisasjoner

John Reidar Bartle Mathiassen

  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean

Ulf Gøran Erikson

  • Tilknyttet:
    Forfatter
    ved Havbruk ved SINTEF Ocean
1 - 4 av 4