EFFECT OF SALT AND OZONIZED-SLURRY ICE ON THE QUALITY INDICES OF TIGER GROUPER (Epinephelus fuscoguttatus)
Loading...
Files
Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Sustainability Science and Management
Abstract
Tiger grouper is a high value of live reef fsh, which mainly exported to Hong Kong, Japan
and Singapore. This study was carried out to investigate the quality indices (microbial and chemical)
of tiger grouper (Epinephalus fuscoguttatus) stored for 20 days in slurry ice treated with 0.1 mg
ozone l-1 (O3) and 3.3% sodium chloride (NaCl). Slurry ice contains 60% ice and 40% water was used
as control. All samples were analysed for total aerobic, psychrotrophic bacteria, total volatile based
nitrogen (TVBN) and trimethylamine (TMA) at interval of 5 days during 20 days storage. The total
bacteria count of tiger grouper treated in slurry ice with O3 (SI+O3) showed signifcantly (p<0.05)
decreased to about 0.24 log units compared to controls. However, bacteria counts of tiger grouper
treated in slurry ice with NaCl (SI+NaCl) were not signifcantly different from both the controls
and SI+O
3 samples. Psychrotrophics bacteria counts were effectively reduced to 0.39 and 0.18 log
units after treatment of SI+O
3 and SI+NaCl, respectively. TVBN and TMA contents during 20 days
storage for all treatments did not exceed the acceptable limit of 35 mg N 100g-1 and 15 mg N 100g-1,
respectively. No signifcant difference (p>0.05) was found between controls and treated samples for
TVBN and TMA contents. The combination of the slurry ice and ozone may be recommended for
chilling and storage of tiger grouper to improve its storage quality.
Description
Keywords
Microbiological quality, total volatile based nitrogen (TVBN), trimethylamine (TMA), ozone, slurry ice