Nucleotide Degradation of Pearl Spot during Modified Atmosphere Storage

Srinivasa Gopal T.K.; Leema Jose; Manju S.; Kamalakanth C.K.; Ravishankar C.N.; Ashok Kumar K.

doi:10.56093/ft.v43i2.16747

Authors

Srinivasa Gopal T.K. Central Institute of Fisheries Technology, Cochin
Leema Jose Central Institute of Fisheries Technology, Cochin
Manju S. Central Institute of Fisheries Technology, Cochin
Kamalakanth C.K. Central Institute of Fisheries Technology, Cochin
Ravishankar C.N. Central Institute of Fisheries Technology, Cochin
Ashok Kumar K. Central Institute of Fisheries Technology, Cochin

https://doi.org/10.56093/ft.v43i2.16747

Keywords:

Modified Atmosphere Packaging, K value. Pearl spot, Polyester/Polyethylene laminate

Abstract

The effect of modified atmosphere packaging (MAP) at different gas concentration on chill stored pearl spot (Etroplus suratensis Bloch) was examined by means of nucleotide degradation and sensory evaluation. K value, a quality index for fish, the ratio of the sum of inosine and hypoxanthine to the sum of ATP and related catabolites expressed as a percentage, was determined until sensory rejection during storage up to 23 days at 0 - 20C. The C02 concentration did not affect the K values of pearl spot. K value increased linearly in samples stored under air and four different modified atmospheres. Identical K values were obtained for Pearl spot packed in either aerobic or carbon dioxide modified atmosphere. K values were independent of sensory spoilage and correlate only with the length of storage of pearl spot packed under MAP.