Differential effects of electrical stunning on the early post-mortem glycolysis in sheep

Effect of bleeding method and low voltage electrical stimulation on meat quality of ostriches

“…It can thus be concluded that there seems to be no positive or negative effect on any of the physical meat quality attributes evaluated with ES on ostriches. However, these results may be confounded by other factors such as ante mortem stress (Devine et al, 2006), the fact that electrical stunning was applied (Devine et al, 1984), the inherent high and rapid change in ostrich muscle pH. Another factor that may have influenced the end result, or lack thereof, is the fact that only one set of ES parameters were evaluated and it has been well documented that different parameters (voltage, duration, pulse width/frequency, etc.)…”

The Effect of Stunning Method on the pH of Lamb

“…Other workers have carried out a similar study and found that different stunning methods resulted in marked differences in the pH drop which occurred during stunning [5]. However, it has been found that head-only stunning had little or no effect on the postmortem glycolysis of lamb loins (M.longissimus thorucis er lumborum) [5,15]. The fact that there was no significant difference between the two groups in the present study would indicate that electrical stunning did not have an electrical stimulation effect on the carcasses.…”

“…The 1 h, 4 h and 24 h measurements of the two groups were also not significantly different. Other workers have carried out a similar study and found that different stunning methods resulted in marked differences in the pH drop which occurred during stunning [5]. However, it has been found that head-only stunning had little or no effect on the postmortem glycolysis of lamb loins (M.longissimus thorucis er lumborum) [5,15].…”

Project to develop Animal Welfare Risk Assessment Guidelines on Stunning and Killing

“…Various stunning methods and electrical parameters have been reported to have a different effect on post-mortem rigor development (Devine et al, 1984;Gregory, 1984;Hillebrand et al, 1996;Bilgili, 1999Bilgili, , 1992Roth et al, 2002Roth et al, , 2003. The post mortem metabolism is largely a consequence of indirect stimulation through nervous pathways.…”