The effect of exercise stress, adrenaline injection and electrical stimulation on changes in quality attributes and proteins in Semimembranosus muscle of lamb

Bond, J. J.; Can, L.A; Warner, R. D.

doi:10.1016/j.meatsci.2004.05.001

Cited by 64 publications

(62 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Higher meat pH levels and a slower pH decline found in HIGH lambs suggest that the handling treatment used in the present study caused depletion of muscle glycogen stores before slaughter that resulted in a decrease in lactic acid production after slaughter. Sufficient glycogen in the muscle at the time of slaughter is needed to support lactate production post-slaughter to a level that results in desirable ultimate pH levels (⩽5.8; Meat & Livestock Australia, 2002;Bond et al, 2004). In the present study, pH levels of HIGH lambs were still higher than 5.8, 24 h post-slaughter.…”

Section: Discussionmentioning

confidence: 46%

“…Several stressors imposed before slaughter have been shown to elevate postmortem pH levels in sheep, including transport alone (Zhong et al, 2011), transportation on rough roads (Ruiz-De-La-Torre et al, 2001), exercise (Bond et al, 2004;Warner et al, 2005) and swim washing (Geesink et al, 2001). Interestingly, stressors appear to have an accumulative effect on meat pH.…”

Section: Discussionmentioning

confidence: 99%

“…Correspondingly, Warner et al (2005) found that exposing lambs to acute exercise pre-slaughter caused high ultimate pH, increased tenderness, improved overall eating quality but caused darkcutting (DC) meat. Meat & Livestock Australia (2002) and Bond et al (2004) classify meat with an ultimate pH between 5.8 and 6.9 and 5.7 and 5.9 as DC, respectively. However, others have categorised meat with pH values ⩾ 6.0 as DC (Newton and Gill, 1981;Devine et al, 1993;Apple et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Stressful conditions before slaughter can reduce muscle glycogen stores, which may result in elevated ultimate pH of meat and low residual levels of glucose (Bray et al, 1989;Bond et al, 2004;Warner et al, 2005). This can substantially influence postmortem muscle biochemistry and physiology that govern important meat quality attributes such as tenderness, water-holding capacity, flavour, meat colour and microbiological shelf-life (Newton and Gill, 1981;Honikel, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Both exercise (Warner et al, 2005;Cockram et al, 2012) and the presence of a dog (Beausoleil et al, 2005;Zimerman et al, 2013) are known to cause behavioural and physiological changes in lambs indicative of stress. Furthermore, 10 to 15 min of enforced exercise is sufficient to have a negative impact on meat quality characteristics in lambs (Bond et al, 2004;Warner et al, 2005). Few studies, however, have directly studied the effect of handling regimes relevant to extensive systems (an extended exercise period in combination with the presence of a dog) on welfare and meat quality of lambs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of pre-slaughter handling, exercise and the presence of a dog on lamb welfare and meat quality

Sutherland

Worth

Stuart

et al. 2016

Animal

View full text Add to dashboard Cite

Before slaughter, lambs may experience several stressors such as feed and water deprivation, handling and transport that have the potential to negatively impact welfare and meat quality. The objective of this study was to evaluate the effect of pre-slaughter handling, exercise and the presence of a dog on the behaviour and physiology of lambs and meat quality at slaughter. At 6 months of age, 60 lambs ( n = 20 lambs/replicate; three replicates) were allocated to one of the two treatment groups ( n = 30 lambs/ treatment): low (LOW) intensive handling or high (HIGH) intensive handling. LOW lambs were moved short distances, quietly and without the use of a dog before transport. HIGH lambs were moved quickly, long distances and with a dog present before transport. Lamb behaviour (standing, lying, rumination and panting) was recorded for 1 h before (post-treatment) and after transport (post-transport), and for 30 min before slaughter (pre-slaughter). Blood samples were collected before (baseline), after transport (post-transport) and at exsanguination (at slaughter) to assess cortisol, lactate and non-esterified fatty acid (NEFA) concentrations. At slaughter, lamb carcases ( M. longissimus lumborum) were evaluated for pH levels, drip and cook loss, and tenderness. HIGH lambs spent more time standing ( P < 0.001) and panting ( P < 0.001) and less time lying ( P < 0.001) and ruminating ( P < 0.001) post-treatment than LOW lambs, but more ( P < 0.001) time ruminating post-transport. All lambs spent more time standing ( P < 0.001) and less time lying ( P < 0.001) and panting ( P < 0.001) post-transport and pre-slaughter than post-treatment. Cortisol concentrations were greater ( P < 0.001) in lambs post-transport and at slaughter compared with baseline values. Lactate concentrations were lower ( P = 0.002) in HIGH than LOW lambs. In addition, NEFA concentrations were higher ( P < 0.001) post-transport and at slaughter in HIGH compared with LOW lambs. Ultimate pH was higher ( P < 0.001) in HIGH than LOW lambs and pH declined quicker ( P = 0.012) in LOW than HIGH lambs. Cook loss, drip loss and shear force were lower ( P ⩽ 0.05) in HIGH than LOW lambs. The HIGH intensive pre-slaughter handling regime used in the present study caused stress in lambs and increased ultimate pH that could potentially negatively impact welfare, product quality and consistency.

show abstract

Section: Discussionmentioning

confidence: 46%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of pre-slaughter handling, exercise and the presence of a dog on lamb welfare and meat quality

Sutherland

Worth

Stuart

et al. 2016

Animal

View full text Add to dashboard Cite

show abstract

Muscle Proteins

Kang

Singh

2014

Applied Food Protein Chemistry

View full text Add to dashboard Cite

Effects of road type during transport on lamb welfare and meat quality in dry hot climates

Lama

Monge

Villarroel

et al. 2011

Trop Anim Health Prod

View full text Add to dashboard Cite

This study determined whether transporting lambs on paved (PR) or unpaved roads (UR) for 3 h had an effect on plasma stress indicators (cortisol, lactate, glucose, creatine kinase [CK], red blood cells, white blood cells, hematocrit, and neutrophil/lymphocyte [N/L] ratio) and instrumental meat quality (pH24, bruising score, water holding capacity [WHC], color, and texture). A total of 48 Rasa Aragonesa male lambs were used that were approximately 100 days old (12.5 kg ± 1.64, carcass weight). The results suggest that transport on unpaved roads had a significant influence on physiological and hematological stress parameters. Road type had a significant effect on all variables, except for white and red blood cells, and hematocrit levels. The UR lambs had significantly higher (at least p ≤ 0.01) cortisol, lactate, glucose, and CK levels and a higher N/L ratio than PR lambs. Meat from UR lambs had some dark-cutting characteristics, with a darker color, higher ultimate pH, and higher tenderness values than PR. In conclusion, lambs transported on unpaved roads had a more intense stress response and poorer meat quality than lambs transported on paved roads. An effort to improve the logistics associated with route planning is necessary to prevent welfare problems during transport to slaughter.

show abstract

The effect of exercise stress, adrenaline injection and electrical stimulation on changes in quality attributes and proteins in Semimembranosus muscle of lamb

Cited by 64 publications

References 30 publications

Effect of pre-slaughter handling, exercise and the presence of a dog on lamb welfare and meat quality

Effect of pre-slaughter handling, exercise and the presence of a dog on lamb welfare and meat quality

Muscle Proteins

Effects of road type during transport on lamb welfare and meat quality in dry hot climates

Contact Info

Product

Resources

About