Abstract:
The present study was carried out to determine freshness quality and remaining storage
time of eclipse parrotfish and spangled emperor stored in ice on days 0, 2, 3, 5, 7, 9, 12,
15, 19 and 21 using selective methods. A score of 11-12 coincided with the level at
which the fish were considered unacceptable by a sensory panel of six experienced
assessors. The demerit score of eclipse parrotfish and spangled emperor increased
linearly (R2
=0.9563 and 0.9624, respectively) with storage time. The limit for
acceptability of eclipse parrotfish and spangled emperor stored in ice was 9 and 19 days
respectively. Total volatile base nitrogen value (45.87±1.10 mg/100g) for parrotfish
stored in refrigerator exceeded limit of acceptability at the time of sensory rejection
(9th day) while the value (5.93±0.28 mg/100 g) for spangled emperor was remained
below the limit of acceptability after 9 days and increased to 54.96±1.80 mg/100g at the
19th day. The pH for both fishes showed significant (p<0.05) increases during the
storage. Total viable count in spangled emperor analyzed were found to be below the
acceptability limits (6 log10 cfu/g) by 15 days while maximum level of acceptability of
eclipse parrotfish was until 7 days. Shelf-life of both fishes was different. Sensory
score, value of TVB-N, pH and TVC provide evidence that the limit for acceptability
was 7 days for eclipse parrotfish and 15 days for spangled emperor stored at 0 - 2
0C.
