Effects of transport time and rest period on the quality of electrically stimulated male cattle carcasses

Ferreira, Gláucio B.; Andrade, César; Costa, Fernando Albuquerque; Freitas, Mônica Q.; Silva, T.J.P.; Santos, I.F.

doi:10.1016/j.meatsci.2006.04.006

Cited by 18 publications

(12 citation statements)

References 25 publications

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“…Some studies have found that allowing cattle to rest and replenish their glycogen stores at the packing plant before slaughter reduces ante-mortem stress and thus decreases the prevalence of dark cutters (Brown et al 1990;Ferreira et al 2006;Mounier et al 2006a). Other studies have found that the introduction to unfamiliar cattle and a novel environment negates the positive effects of lairage and actually increases the prevalence of dark cutters (Kreikemeier et al 1998;Gallo et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Road transport conditions of slaughter cattle: Effects on the prevalence of dark, firm and dry beef

Warren¹,

Mandell²,

Bateman³

2010

Can. J. Anim. Sci.

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. 2010. Road transport conditions of slaughter cattle: effects on the prevalence of dark, firm and dry beef. Can. J. Anim. Sci. 90: 471Á482. This is a benchmark study to investigate slaughter cattle transportation conditions in Canada. Data collected included: season; temperature variation; truck ventilation; transport conditions; length of time in transit; trucker training and experience hauling cattle; number of lots and whether lots were separated; sex and whether sexes were separated on mixed loads; cattle unloading gait score; cattle handling score; cattle weight and number of dark cutters. Information was collected on approximately 50 000 animals transported by 1363 trucks. The prevalence of dark cutters (mean 02% per truckload) was highest in mixed loads, followed by heifers and steers. Mixed loads that were not separated (steers and heifers in the same compartment) had a greater prevalence of dark cutters than mixed loads that were separated. The GLIMMIX procedure in SAS 9.1 was used for the analysis of the risk factors associated with dark cutters. Province of origin, cattle unloading speed, driver training, truck ventilation, trucking experience, sex, origin (sale barn or feedlot) and whether or not cattle were held in lairage overnight were all significant predictors for dark cutting beef.Key words: Cattle, transport, dark cutter, dark, firm, dry, beef Warren, L. A., Mandell, I. B. et Bateman, K. G. 2010. Transport du be´tail d'abattage par la route: incidence sur la pre´valence de la viande a`coupe somber. Can. J. Anim. Sci. 90: 471Á482. Cette e´tude se veut une e´tude de re´fe´rence sur les conditions dans lesquelles les bovins d'abattage sont transporte´s au Canada. Les donne´es recueillies comprenaient les suivantes: la saison, l'e´cart de tempe´rature, l'ae´ration dans le camion, les conditions de transport, la dure´e du transit, la formation et l'expe´rience du camionneur en transport du be´tail, le nombre de lots et se´paration ou pas de ces derniers, le sexe des animaux et la se´paration ou pas des deux sexes dans les chargements mixtes, la de´marche des animaux lors du de´chargement, la cote pour la manutention du be´tail, le poids des animaux et le nombre d'animaux a`viande de coupe sombre. L'information a e´te´recueillie sur environ 50 000 beˆtes transporte´es dans 1 363 camions. La pre´valence d'animaux a`viande de coupe sombre (moyenne 02% par camion) atteint un maximum dans les chargements mixtes, puis chez les ge´nisses et enfin, les bouvillons. Les lots mixtes non se´pare´s (bouvillons et ge´nisses dans le meˆme compartiment) donnent un plus grand nombre d'animaux a`viande de coupe sombre. Les auteurs ont recouru a`la me´thode GLIMMIX de SAS 9.1 pour analyser les facteurs de risque associe´s aux animaux a`viande de coupe sombre. La province d'origine, la rapidite´du de´chargement, la formation du chauffeur, l'ae´ration dans le camion, l'expe´rience du camionneur, le sexe, la provenance (encan ou parc d'engraissement) et le fait que les animaux soient ou pas garde´s toute la nuit dans d...

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Section: Discussionmentioning

confidence: 99%

Road transport conditions of slaughter cattle: Effects on the prevalence of dark, firm and dry beef

Warren¹,

Mandell²,

Bateman³

2010

Can. J. Anim. Sci.

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“…Transportation stress usually leads to depletion of muscle glycogen reserves before slaughter, which subsequently results in a higher ultimate pH of meat, low meat quality characteristics such as toughness, increased water‐holding capacity and darker meat color (Grandin 1995). It has been suggested that a resting period for up to 24 h is necessary for animals to recover from adverse conditions of road transport prior to slaughter (Ferreira et al. 2006).…”

Section: Introductionmentioning

confidence: 99%

Effects of transportation during the hot season, breed and electrical stimulation on histochemical and meat quality characteristics of goat longissimus muscle

Kadim

Mahgoub

Al-Marzooqi

et al. 2010

Animal Science Journal

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The effects of transportation and electrical stimulation (90 V) on physiological, histochemical and meat quality characteristics of two breeds of Omani goats were assessed. Twenty 1-year-old male goats from each breed (Batina and Dhofari) were divided into two groups: 3 h transported during the hot season (42 degrees C day time temperature) and non-transported. Animals were blood-sampled before loading and prior to slaughter. Electrical stimulation was applied 20 min postmortem to 50% randomly selected carcasses of both breeds. Temperature and pH decline of the Longissimus was monitored. Ultimate pH, shear force, sarcomere length, myofibrillar fragmentation index, expressed juice, cooking loss and colour were measured from samples of Longissimus dorsi muscles. Electrical stimulation and transportation had a significant effect on most biochemical and meat quality characteristics of Longissimus dorsi. The transported goats had higher plasma cortisol (P < 0.01), adrenaline, nor-adrenaline and dopamine concentrations (P < 0.05) than non-transported goats. Electrical stimulation resulted in a significantly (P < 0.05) more rapid muscle pH fall during the first 12 h after slaughter. Muscles from electrically-stimulated carcasses had significantly (P < 0.05) longer sarcomeres, lower shear force value, a lighter colour (higher L* value), higher expressed juice and myofibrillar fragmentation index than those from non-stimulated ones. Meat from transported goats had significantly higher pH, expressed juice and shear force, but contained significantly lower sarcomere length and L* values than non-transported goats. The proportion of the myosin ATPase staining did not change as a function of stimulation, transportation or breed. These results indicated that subjecting goats to transportation for 3 h under high ambient temperatures can generate major physiological and muscle metabolism responses. Electrical stimulation improved quality characteristics of meat from both groups. This indicates that electrical stimulation may reduce detrimental effects of transportation on meat quality of Omani goats.

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“…In this context, Romero, Uribe-Velásquez, Sánchez, & Miranda-de la Lama (2013) found that animals from markets or that made stops during the journey had higher pH levels compared to those transported directly from the farm to the slaughter plant. María et al (2003) and Ferreira et al (2006) did not find many significant changes in meat pH in terms of journeys duration but few effects are noted when stress is mild or animals are in good health. According to Warriss, Kestin, Brown, & Wilkins (1984) glycogen resources can be restored at lairage, and cattle can recover from physical exhaustion even if they are not fed.…”

Section: Product Quality and Post Mortem Indicatorsmentioning

confidence: 86%

Pre-slaughter cattle welfare indicators for use in commercial abattoirs with voluntary monitoring systems: A systematic review

et al. 2018

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Animal welfare has become an important subject of public, economic and political concern, leading to the need to validate indicators that are feasible to use at abattoirs. A systematic review was carried out, which identified 72 cattle welfare indicators (CWI) that were classified into four categories (physiological, morphometric, behavioral and meat quality). Their validity and feasibility for use in abattoirs were evaluated as potential measures of cattle welfare during transportation to the abattoir and at the abattoir itself. Several highly valid indicators were identified that are useful to assess welfare at abattoirs, including body condition score, human-animal interactions, vocalizations, falling, carcass bruising, and meat pH. In addition, some intermediate valid indicators are useful and should be investigated further. Information along the food chain could be used systematically to provide a basis for a more-risk-based meat inspection. An integrated system based on the use of key indicators defined for each inspection step with the setting of alarm thresholds could be implemented.

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Effects of transport time and rest period on the quality of electrically stimulated male cattle carcasses

Cited by 18 publications

References 25 publications

Road transport conditions of slaughter cattle: Effects on the prevalence of dark, firm and dry beef

Road transport conditions of slaughter cattle: Effects on the prevalence of dark, firm and dry beef

Effects of transportation during the hot season, breed and electrical stimulation on histochemical and meat quality characteristics of goat longissimus muscle

Pre-slaughter cattle welfare indicators for use in commercial abattoirs with voluntary monitoring systems: A systematic review

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