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Fishes 2017, 2(3), 10; doi:10.3390/fishes2030010

Monitoring Red Sea Bream Scale Fluorescence as a Freshness Indicator

1
Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan
2
Department of Planning and Environment, Ehime Research Institute of Agriculture, Forestry and Fisheries, Matsuyama, Ehime 799-2405, Japan
3
Agricultural Engineering Department, Faculty of Agricultural Technology, University of Brawijaya, Malang 65145, Indonesia
4
Advanced Research Support Centre, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Maria Angeles Esteban
Received: 26 May 2017 / Revised: 28 June 2017 / Accepted: 3 July 2017 / Published: 10 July 2017
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Abstract

Red sea bream (Pagrus major) scale fluorescence characteristics were identified as a potential rapid and non-destructive means for assessing the fish’s freshness. To investigate this, live red sea breams were purchased, slaughtered, and prior to measurement, stored at 22 ± 2 °C for 27 h. During subsequent storage, the K value of the dorsal meat—as a standard freshness indicator—along with front-face fluorescence spectra of representative dorsal scales, were measured simultaneously at 3 h intervals. Two major fluorescent peaks, A and B, were identified with excitation and emission wavelength pairs of 280/310 nm and 340/420 nm, which were mainly contributed to by tyrosine and collagen, respectively. Subsequent analysis showed that the fluorescence intensity ratio of peak B to A (IB/IA) increased linearly during storage (R2 = 0.95) and is proposed as a potential non-destructive index of fish freshness. Thus, our results suggest that the fluorescence characteristics of fish scales can be used to assess fish carcass freshness during storage. View Full-Text
Keywords: freshness; scales; front-face fluorescence; intensity ratio freshness; scales; front-face fluorescence; intensity ratio
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liao, Q.; Suzuki, T.; Yasushi, K.; Al Riza, D.F.; Kuramoto, M.; Kondo, N. Monitoring Red Sea Bream Scale Fluorescence as a Freshness Indicator. Fishes 2017, 2, 10.

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