Effect of electrical stunning current and frequency on meat quality, plasma parameters, and glycolytic potential in broilers

Xu, Ling; Zhang, Long; Yue, Hui; Wu, Shu‐geng; Zhang, H. J.; Ji, Feng; Qi, Guang‐hai

doi:10.3382/ps.2010-01249

Cited by 39 publications

(37 citation statements)

References 30 publications

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“…In general, plasma CORT can be regarded as an indicator of stress conditions in chickens (Bedanova et al 2007;Haensch et al 2009;Xu et al 2011) as it has been shown to increase in transport-stressed broilers (Freeman et al 1984;Kannan et al 1997). In the present study, the concentrations of plasma CORT in the TWFR group was significantly lower (P < 0.05) than other two groups, indicating that water-misting sprays with forced ventilation can alleviate stress by transportation during high temperatures.…”

Section: Resultsmentioning

confidence: 99%

Effects of water‐misting sprays with forced ventilation on post mortem glycolysis, AMP‐activated protein kinase and meat quality of broilers after transport during summer

Jiang

Xing

Han

et al. 2015

Animal Science Journal

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Effects of water-misting sprays with forced ventilation on post mortem glycolysis, adenosine monophosphate-activated protein kinase (AMPK) and meat quality of broilers after transport during summer were investigated in the present paper. A total of 105 mixed-sex Arbor Acres broilers were divided into three treatment groups: (i) 45 min transport without rest (T); (ii) 45 min transport with 1 h rest (TR); and (iii) 45 min transport with 15 min water-misting sprays with forced ventilation and 45 min rest (TWFR). Each treatment consisted of five replicates with seven birds each. The results indicated that the water-misting sprays with forced ventilation could mitigate the stress caused by transport under high temperature conditions during summer, which reduced the energy depletion in post mortem Pectoralis major (PM) muscle. This resulted in a higher energy status compared to the T group, which would decrease the expression of phosphorylation of AMPK (p-AMPK). Furthermore, decreased the expression of p-AMPK then slowed down the rate of glycolysis in post mortem PM muscle during the early post mortem period, which in turn lessened the negative effects caused by transport on meat quality. In conclusion, water-misting sprays with forced ventilation may be a better method to control the incidence of the pale, soft and exudative meat in broilers.

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Section: Resultsmentioning

confidence: 99%

Effects of water‐misting sprays with forced ventilation on post mortem glycolysis, AMP‐activated protein kinase and meat quality of broilers after transport during summer

Jiang

Xing

Han

et al. 2015

Animal Science Journal

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“…At 72 h postmortem, the muscles were dried and weighed (W 1 ), and then heated in a water bath at 85°C for 20 min (end-point temperature of 80°C), cooled in running water to ambient temperature, and then dried and reweighed (W 2 ). Cooking loss was evaluated as (%) = (W 1 − W 2 )/W 1 × 100% (Xu et al, 2011).…”

Section: Measurementsmentioning

confidence: 99%

Effect of monochromatic light stimuli during embryogenesis on muscular growth, chemical composition, and meat quality of breast muscle in male broilers

Zhang

Qiao

et al. 2012

Poultry Science

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This study was conducted to evaluate the effect of monochromatic light stimuli during embryogenesis on breast muscle growth, chemical composition, and meat quality of male broilers. Fertile broiler eggs (Arbor Acres; n = 1,320) were preweighed and randomly assigned to 1 of 3 treatment groups in 3 modified incubators: 1) control group (in dark condition), 2) monochromatic green light group (560 nm), and 3) monochromatic blue light group (480 nm). The monochromatic lighting systems sourced from light-emitting diode lamps and were equalized at the intensity of 15 lx at eggshell level. After hatch, 120 male chicks from each group were placed in 6 replicates with 20 birds each. All of the birds were housed under white light (30 lx at bird-head level) with a light schedule of 23L:1D. At 21, 35, and 42 d of age, BW and breast muscle weight in the green light group were significantly increased compared with birds in the blue or dark groups (P < 0.05). The breast muscle weight and breast muscle percentages in birds incubated under green light were significantly elevated by 50.39 g (0.76%) and 54.07 g (1.20%) than those in the dark condition or blue group at 42 d of market age (P < 0.05), respectively. In the green light group, feed intake during 0~42 d was higher than that in the other 2 treatment groups (P < 0.05); feed conversion ratio during 0~35 and 0~42 d were lower than that in the dark condition (P < 0.05). No significant differences in the contents of breast moisture, CP, crude fat, and crude ash among all groups were observed (P > 0.05). Green light stimuli tended to increase cooking loss (P = 0.08) and L* value of 24-h meat color (P = 0.09). These results suggest that green light stimuli during embryogenesis enhanced the posthatch BW of male broilers, increased breast muscle growth, and improved the feed conversion ratio, but it did not cause any noticeable changes in breast chemical composition or overall meat quality characteristics.

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“…Glycogen concentration of Pectoralis major decreased in carcasses stunned with high frequencies showing a fast exhaustion of glycogen at the early post mortem examination, according to Xu et al (2011). Preliminary results of the study showed that the use of lower intensity and frequency electrical conditions led to a major muscle glycogen reserve in Lot A carcasses than Lot control (Lot C 0.770 μL/50mL; Lot A 1.497 μL/50mL).…”

Section: Discussionmentioning

confidence: 90%

“…High stunning frequencies may improve meat quality without aggregating stress, when the current is not too low, with a considerable commercial advantage (Xu et al , 2011). Incidence of birds with carcass defects sufficient to cause downgrading or rejection, was generally low.…”

Section: Discussionmentioning

confidence: 99%

“…The return of eye reflexes and rhythmic breathing are clinic indicators of the early return of the functions of the brain after electrical stunning (von Holleben et al , 2010). The high level of plasma corticosterone is a biochemical indicator of stress in birds (McFarlane and Curtis, 1989; Xu et al , 2011). Presently, Electrocardiogram (ECG) and Electroencephalogram (EEG) are considered indicators of unconsciousness and insensibility, nevertheless may not be practical methods to ascertain, routinely, the effectiveness of the stun at the abattoir (EFSA, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Preliminary study on physicochemical and biochemical stress markers at poultry slaughterhouse

Santonicola¹,

Peruzy²,

Girasole³

et al. 2017

Ital J Food Safety

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Pre-slaughter stress can result in variations in the glycogen storage and metabolic changes of muscle, responsible for quality poultry meat. Aim of this study was to investigate, as pre-slaughter stress markers and quality meat, physicochemical (pH), biochemical (muscle glycogen content), and chemical (super oxides free radicals) parameters. The carcass quality, as incidence of individual carcass defects, was also evaluated. Twenty broilers were processed with two different electrical stunning: high (250 Hz; 640 mA; 60V) (Lot C or control) and low (150 Hz; 360 mA; 60 V) (Lot A) frequency and intensity, using sinusoidal alternating current. As preliminary results, the use of low frequency and intensity induced faster pH decline post mortem and adequate acidification of pH at 3 hours (6.49 Lot C; 6.37 Lot A), better muscle glycogen reserve (0.770 μL/50 mL Lot C; 1.497 μL/50mL Lot A), and lightly more rapid muscle oxidation (IDF: 0.109 Lot C; 0.122 Lot A), (FOX: 0.131 MeqO2/kg Lot C; 0.140 MeqO2/kg Lot A). The incidence of individual carcass defects sufficient to cause downgrading or rejection, both in Lot C and Lot A, was generally low. In a multidisciplinary approach, to assess animal welfare and quality poultry meat, additional and feasible parameters should be implemented. Monitoring of pH, muscle glycogen reserve and superoxide free radical production measurements might be markers easier to use, routinely, in practice at abattoir. Further studies are needed to evaluate the usefulness of these parameters.

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Effect of electrical stunning current and frequency on meat quality, plasma parameters, and glycolytic potential in broilers

Cited by 39 publications

References 30 publications

Effects of water‐misting sprays with forced ventilation on post mortem glycolysis, AMP‐activated protein kinase and meat quality of broilers after transport during summer

Effects of water‐misting sprays with forced ventilation on post mortem glycolysis, AMP‐activated protein kinase and meat quality of broilers after transport during summer

Effect of monochromatic light stimuli during embryogenesis on muscular growth, chemical composition, and meat quality of breast muscle in male broilers

Preliminary study on physicochemical and biochemical stress markers at poultry slaughterhouse

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