Welfare and hygiene during preslaughter handling

Ng, Guseva

doi:10.1016/0309-1740(96)00053-8

Cited by 34 publications

(21 citation statements)

References 35 publications

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“…The pre-slaughter handling of animals has an important effect on the quality of meat as well as implications for animal welfare (Warriss, 1993;Gregory, 1996;Goddard, 1998). When animals are subjected to stress, their muscle glycogen stores can become depleted, which will result in high ultimate pH values in the meat (DFD).…”

Section: Discussionmentioning

confidence: 99%

“…Replenishment does not occur quite so readily in the muscles of ruminants because of the special ruminant carbohydrate metabolism, which has little direct access to dietary glucose and must rely on gluconeogenesis, in particular from propionate (Lister, 1989). High ultimate pH values in meat from ruminants (beef cattle, reindeer (Rangifer tarandus tarandus), red deer and fallow deer) have been related to pre-slaughter handling stress (Malmfors et al, 1983;Warriss et al, 1984;Warriss, 1990;Wiklund, 1996;Pollard et al, 1999) and poor nutritional status of the animals (Gregory, 1996;Wiklund et al, 1996;Pollard et al, 1999). Generally though, there is very limited basic information available on glycogen levels and metabolism in muscles and implications for meat quality for game animals like deer.…”

Section: Introductionmentioning

confidence: 99%

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Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus) and fallow deer (Dama dama)

Wiklund

Manley

Littlejohn

2004

Ran

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Abstract:The ultimate pH value of meat (measured at approx. 24 hours post slaughter) gives information about the technological quality, i.e. shelf life, colour, water-holding properties and tenderness and is a direct consequence of muscle glycogen (energy) levels at slaughter. It may therefore also indicate whether or not the animal has been exposed to stressful energy depleting events prior to slaughter. In the present study, 141 animals (130 red deer (Cervus elaphus) and 11 fallow deer (Dama dama) were included to investigate the relationship between ultimate pH and residual glycogen concentration in red deer and fallow deer M. longissimus. In addition, the muscle glycogen content and ultimate pH values in three red deer muscles (Mm. triceps brachii, longissimus and biceps femoris) were studied. M. triceps brachii had higher ultimate pH and lower glycogen content compared with the other two studied muscles. The frequency of intermediate DFD (5.8≤ pH<6.2) was 5.4% in red deer M. longissimus, compared with 9.1% in fallow deer, while the frequency of DFD (pH≥ 6.2) was much lower in red deer (3.8%) than in fallow deer (54.5%). A curvilinear relationship between ultimate pH and total glucose concentration (glycogen and glucose) 30 min post slaughter in red deer and fallow deer M. longissimus was found. The relationship between muscle pH and lactic acid concentration however, was indicated to be linear. A significant variation in total glucose concentration at ultimate pH below 5.80 was observed, including values in the range from 18 to 123 mmol/kg wet tissue. It was concluded that further studies are needed to further explore the relationship between muscle glycogen content and technological and sensory quality attributes of meat from different deer species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus) and fallow deer (Dama dama)

Wiklund

Manley

Littlejohn

2004

Ran

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“…A head or neck shot normally results in the animals dropping instantly, whilst a shoulder or rib shot could result in the animals running substantial distances before dying (von La Chevallerie & van Zyl, 1971). The latter is unacceptable from a meat quality perspective (Gregory, 1996;Issanchou, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Within South Africa, venison is normally perceived to be a dark unattractive red colour, somewhat similar to beef that has been classified as dark firm and dry (DFD) (Scanga et al, 1998). This phenomenon is normally associated with ante-mortem stress which causes muscle glycogen depletion and thus increases the risk of a high ultimate pH (Gregory, 1996;Scanga et al, 1998) and therefore the likelihood of the meat spoiling, pathogens proliferating and of the meat being unacceptably dark in colour (Gill & Reichel, 1989).…”

Section: Introductionmentioning

confidence: 99%

Meat quality attributes of night-cropped Impala (Aepyceros melampus)

Hoffman¹

2000

SA J. An. Sci.

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The aim of this experiment was to determine the effect of using a heavy or a light calibre rifle for night cropping of impala (Aepyceros melampus) on meat quality (pH, colour, cooking and drip loss, tenderness). The effect of gender on these parameters was also tested. Eight male and eight female impala were shot at night using either a heavy or a light calibre rifle. Sex and rifle calibre had an effect on some of the parameters tested. An exponential function (y = a + b e (ct) ) was fitted to the rate of pH decline with time. Constants for females were: a = 5.667 ± 0.0142, b = 2.097 ± 0.1777 and c = -0.451 ± 0.0541, and constants for males were: a = 5.792 ± 0.0142, b = 3.055 ± 0.1777 and c = -0.711 ± 0.0541. These constants differed (P < 0.05) between sexes. The impala showed a mean pH 45 of 7.17 ± 0.0674 and a mean pH f of 5.70 ± 0.068. Mean drip and cooking loses were 2.55 ± 0.300%, 23.98 ± 0.367%, respectively, whilst a mean shear value of 3.65 ± 0.293 kg / 1.27 cm diameter was also noted. The darker colour of venison was reflected in the CIELAB values of the M. longissimus thoracis (L* = 29.22 ± 0.590, a* = 11.26 ± 0.319, b* = 7.36 ± 0.266). One of the animals was stressed prior to and during killing, and showed attributes associated with ante-mortem stress: higher pH f , lower drip loss and darker meat. The results indicate that the present method of cropping ungulates does not have a negative effect on the meat quality parameters tested.

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“…As injúrias mais encontradas durante o experimento foram as contusões/fraturas e corroboram os estudos de Nicol & Scott (1990) sobre manejo e transporte pré-abate, de Gregory (1996) sobre o efeito do estresse pré-abate e algumas das maneiras em que o bem estar é comprometido interferindo inclusive na higiene da carcaça, e de Ferreira et al (2012) que investigou sobre as perdas econômicas decorrentes das principais causas de condenação em carcaças de frango no Sul do Brasil (Tabela 2).…”

Section: Resultsunclassified

Técnicas Operacionais, Bem Estar Animal E Perdas Econômicas No Abate De Aves.

Lima¹,

Mascarenhas²,

Cerqueira³

2014

AVS

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RESUMO:Esse estudo objetivou avaliar o impacto econômico a partir das perdas por mortalidade de aves na chegada ao estabelecimento, incidência de contusões, perfil e frequência da ocorrência de alterações sanitárias durante o abate e aspectos visuais da qualidade da carne de aves abatidas e mortas, entre junho de 2011 e maio de 2012 -217 dias de abate -com um corte para avaliação dos procedimentos de manejo pré-abate em dois dias divididos em "sem treinamento para bem estar animal" e "com treinamento para bem estar animal", respectivamente, em uma granja e em um frigorífico sob inspeção estadual na cidade de Conceição da Feira -Bahia. Foram medidos os índices de rejeição por lote abatido, rejeições parciais e totais, suas principais e respectivas causas. Entre as avaliações dos dois dias específicos foi ministrado treinamento básico, sobre manejo adequado para bem estar animal aos funcionários executores das etapas relacionadas, abordando os procedimentos adequados em toda operação pré abate, do cerco à pendura, e nova avaliação foi feita comparando os resultados das duas etapas. O montante perdido em condenações de carcaças em um ano foi de R$ 494.015,18 e grande parte destas perdas (41,21%) deve-se a defeitos tecnológicos dentro do abatedouro. As condenações post-mortem totais representaram 17% e as parciais 83% do total condenado durante o ano, sendo as causas mais prevalentes a escaldagem excessiva e contusão/fratura, respectivamente. As perdas econômicas diárias em média foram de R$2.277,00. O treinamento com as equipes responsáveis pelas operações de pré abate e manutenção influencia diretamente na redução das perdas do frigorífico. Palavras-chave: condenações; contusões; frango; manejo pré abate; prejuízos OPERATIONAL TECHNIQUES, ANIMAL WELFARE AND ECONOMIC LOSSES IN BROILER SLAUGHTERABSTRACT: This study evaluated the economic impact of broilers losses by mortality on arrival at the establishment, the incidence of bruises, profile and frequency of occurrence of health changes during slaughter and visual aspects of meat quality of slaughtered and killed broilers during June 2011 and May 2012 -217 days -and a specific evaluation in two days about welfare procedures (without and with, respectively) in a slaughterhouse under State Inspection in Conceição da FeiraBahia. Between these specific days, was given basic training on adequate handling for animal welfare to employees executors of related steps, addressing the appropriate actions in every pre slaughter operation and a new assessment was made by comparing the results of two steps. The amount lost in carcasses condemnation was R $ 494,015.18 and the most of these losses (41,21%) can be attributed to technical defects in the slaughter. The post-mortem total condemnations was 17% and partial, 83% of yearly condemnations and the most prevalent causes found were excessive scalding and contusion / fracture, respectively. The daily economic losses was R $ 2,277.00. A large part of expenditures can be attributed to technological defects inside the slaughterhouse...

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Welfare and hygiene during preslaughter handling

Cited by 34 publications

References 35 publications

Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus) and fallow deer (Dama dama)

Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus) and fallow deer (Dama dama)

Meat quality attributes of night-cropped Impala (Aepyceros melampus)

Técnicas Operacionais, Bem Estar Animal E Perdas Econômicas No Abate De Aves.

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