Effect of Preslaughter Bull Handling on Ante Mortem Muscle Glycogen and Post Mortem pH and Glycogen Level (short communication)

Abstract

SummaryForty three bulls (13 Holstein, 12 crosses Holstein x Belgium Blue, 9 Slovak Pied and 9 crosses Slovak Pinzgauer x Piemontese) were taken in this experiment. Thirteen were stressed by mixing overnight before slaughter. Muscle values were analysed for glycogen ante mortem (M. semitendinosus), glycogen and pH post mortem (lh, 3h, 48h) from logissimus dorsi. The ante mortem and post mortem (lh, 3h) muscle glycogen concentration was depleted (P<0.01) in all stressed bulls. Differences (PO.01) were found also in pH (48h). Significant correlations (PO.01) between ante mortem and post mortem (lh, 3h) muscle glycogen respectivelly and ultimate pH supported the possibility to measure of stress and to predict carcass ultimate pH of bulls.

Investigating the impact of pre-slaughter management factors on meat quality outcomes in cattle raised for beef: A scoping review

“…The next most reported pre-slaughter management category was environmental factors, which represented studies that evaluated season or weather conditions as predictors (Brown et al, 1990;Kreikemeier et al, 1998;Nanni Costa et al, 2003) or the effects of stressful conditions (e.g., noises and disturbances in the environment; Wythes et al, 1988a;Peña et al, 2014;Pighin et al, 2015;Reiche et al, 2019) on meat quality outcomes. Animal characteristics was a broad category that included animal-related factors (breed type, sex class, and horn status; Wythes et al, 1979b;Tyler et al, 1982;Fabiansson et al, 1984;Kawecki et al, 2020), as well as information relative to the animals' source, which included farm or ranch of origin (Mounier et al, 2006), marketing method (e. Mixing animals, whether in transport or lairage, was considered a handling practice for the purposes of this review; a total of 16 papers studied the effects of mixing during the pre-slaughter period (Bartošet al, 1988;Lahucky et al, 1998;Lahucky et al, 1999). The lairage practices category included lairage duration (n=34) and pen density (n=4; Mach et al, 2008;Hoffman and Lühl, 2012;Romero et al, 2017;Loredo-Osti et al, 2019); just one study in this category assessed the effect of water showering in lairage during cold weather (n=1; Zhao et al, 2022).…”