Color Change of the Snapper (Pagrus auratus) and Gurnard (Chelidonichthys kumu) Skin and Eyes during Storage: Effect of Light Polarization and Contact with Ice

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dc.authoridAYVAZ, Zayde/0000-0002-8102-0577
dc.contributor.authorBalaban, Murat O.
dc.contributor.authorStewart, Kelsie
dc.contributor.authorFletcher, Graham C.
dc.contributor.authorAlcicek, Zayde
dc.date.accessioned2025-01-27T20:16:57Z
dc.date.available2025-01-27T20:16:57Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractTen gurnard and 10 snapper were stored on ice. One side always contacted the ice; the other side was always exposed to air. At different intervals for up to 12 d, the fish were placed in a light box, and the images of both sides were taken using polarized and nonpolarized illumination. Image analysis resulted in average L*, a*, and b* values of skin, and average L* values of the eyes. The skin L* value of gurnard changed significantly over time while that of snapper was substantially constant. The a* and b* values of both fish decreased over time. The L* values of eyes were significantly lower for polarized images, and significantly lower for the side of fish exposed to air only. This may be a concern in quality evaluation methods such as QIM. The difference of colors between the polarized and nonpolarized images was calculated to quantify the reflection off the surface of fish. For accurate measurement of surface color and eye color, use of polarized light is recommended. Practical Application If the eye of fish contacts water, it changes color and transparency as expected: the eye gets cloudier and color becomes lighter. However, if the eye does not contact water, this change is very slow and much less, having implications for freshness scoring by visual observation of the eye. Also, color of fish should be measured under polarized light, otherwise shine will interfere with the true color.
dc.description.sponsorshipNew Zealand Inst. for Plant & Food Research Limited
dc.description.sponsorshipThis study was supported by The New Zealand Inst. for Plant & Food Research Limited. We would like to acknowledge Graeme Summers and Reginald Wibisono for their help.
dc.identifier.doi10.1111/1750-3841.12693
dc.identifier.endpageE2462
dc.identifier.issn0022-1147
dc.identifier.issn1750-3841
dc.identifier.issue12
dc.identifier.pmid25384622
dc.identifier.scopus2-s2.0-84919343485
dc.identifier.scopusqualityQ1
dc.identifier.startpageE2456
dc.identifier.urihttps://doi.org/10.1111/1750-3841.12693
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21449
dc.identifier.volume79
dc.identifier.wosWOS:000346654800007
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofJournal of Food Science
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectcolor
dc.subjectcontact with ice
dc.subjecteye color
dc.subjectgurnard
dc.subjectpolarized light
dc.subjectsnapper
dc.subjectstorage time
dc.titleColor Change of the Snapper (Pagrus auratus) and Gurnard (Chelidonichthys kumu) Skin and Eyes during Storage: Effect of Light Polarization and Contact with Ice
dc.typeArticle

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