The changes in metric chroma and TCD of Pacific white shrimps
during iced storage of 12 days can also be seen in Table 1. The metric
chroma describes the correlate of saturation as well as measure of
vividness of colour (Cruz-Romero, Kelly, & Kerry, 2007). At day 0,
metric chroma of untreated shrimpwas 3.31 0.97. Within the first
six days no significant change in metric chroma was observed
(P > 0.05). However, a marked increase was noticed thereafter and
a peak (8.47 1.30) was achieved at day 10 after which a decline
occurred (P < 0.05). From day two, a significantly fluctuated TCD
was observed (P < 0.05) wherein the data spread exhibited a wavelike
pattern. Similar to the metric chroma, the TCD achieved its
peak (12.94 5.88) at day 10. The increases in metric chroma and
TCD we observed of Pacific white shrimp suggested that at later
stages of iced storage the colour of shrimp specimen could
respectively advance in both vividness and magnitude particularly
at day 10. This seems not to be in agreement with the colour data of
deepwater pink shrimp (Parapenaeus longirostris) processed onboard
with ice as reported by Huidobro et al. (2002). In their work,
colour determination of shrimp was carried out by means of sensory
evaluation. Although initial colour differences the authors