Postmortem Biochemical and Microbiological Changes in Loricariid Catfish (Pterygoplichthys disjunctivus)Muscle During Ice Storage

Comparison between lipid and protein oxidation progress in the tail and claw muscles of signal crayfish (Pacifastacus leniusculus)

“…The results of this study showed a rapid ATP degradation in both muscles, especially in the tail after 24 h of storage. In agreement with this result, a fast ATP degradation was reported in the loricariid catfish (Pterygoplichthys disjunctivus) muscle during 20 days of storage on ice (Marquez-Rios et al, 2016). The slightly higher ATP content in the tail muscle can be explained by higher activity of this part compared to the claw part (Cappeln & Jessen, 2002).…”

“…The K value as an indicator of freshness has been reported by several studies, (Marquez-Rios et al, 2016;Hong et al, 2017a). The depletion of ATP during the post-mortem period leads to an increase in the K value.…”

“…Fogarty et al (2019) reported the same trend in the amount of Hx in Atlantic salmon (Salmo salar) and cod (Gadus morhua) during storage on ice. In addition, the consequences of Hx accumulation is a bitter taste and is linked with lower freshness, which is the initial phase of fish fillet deterioration by autolytic and bacterial activities (Marquez-Rios et al, 2016).…”

“…Fu et al (2014) reported an increasing trend in the K value of Pacific white shrimp (Litopenaeus vannamei) muscles during storage at +4°C. The degradation of ATP compounds leads to a loss in freshness that usually occurs before the deterioration of fish and fish products by enzymatic and bacterial activities (Marquez-Rios et al, 2016). For instance, inosine monophosphate (IMP) has an indirect effect on meat flavour and together with hypoxanthine can contribute to the signs of bitterness during post-mortem period (Tikk et al, 2006).…”

PARTIAL CHARACTERIZATION OF LORICARIID CATFISH (Pterygoplichthys disjunctivus, WEBER, 1991) ROE

“…Recently, research in our laboratory has shown the feasibility of loricariid catfish muscle utilization either fresh (Marquez-Rios et al, 2015) or as a raw material for gel production (unpublished data), as a mean to control the locariid population in the reservoir. On the other hand, taken into account the fertilization capacity of the species, going from a mean of 2000 to 2500 eggs (with a maximum capacity of almost 6700 eggs) in the summer months (Rueda-Jasso et al, 2013), its roe could be also used as a food resource.…”