RESUMO
The objective of this work was to study the effect of blue light diffuser on the broiler stress control by measuring the occurrence of PSE meat just before slaughtering. Birds were divided into the following two groups before slaughter at the point of being hung on shackles: broiler group under low intensity blue light ambience (475, 17-20 lx) and control group under white light (550-650nm, 321-332 lx). Birds' stressful conditions were measured by the occurrence of PSE meat. Breast fillets were classified as PSE meat based on pH (<5.8) and lightness (L*> 53.0). The fillet samples in the control group had the following characteristics: pHu=5.77, L* = 54.26 and b*= 6.27. The fillet samples from birds under blue light ambience had the following characteristics: pHu=5.81, L* = 52.86 and b* = 5.22 (p < 0.05). These results revealed that the treatment of blue light ambience just before slaughtering contributed to the alleviation of ante mortem stress of the birds, which was observed by a 14% decrease in the occurrence of PSE meat. Exposure to blue light just before slaughtering was shown to have potential to be used in modern slaughterhouses to offer a comfortable atmosphere, thereby maintaining breast meat quality.
RESUMO
O objetivo deste trabalho foi avaliar o efeito da distância de transporte e do banho após o carregamento sobre a mortalidade de frangos na chegada ao abatedouro, denominada Mortalidade na Chegada, do ingles Dead on Arrival DOA. O estudo foi conduzido no inverno e no verão de 2008 em abatedouro comercial. No inverno, as distâncias de transporte foram de 15 e 57 km, e no verão foram de 15 e 55 km, sendo os experimentos realizados em duplicata. No verão, para avaliar o efeito do banho sobre os frangos após o carregamento no caminhão, foram avaliados dois lotes em cada distância, lote sem banho (LSB) e lote com banho (LCB). Pelos resultados verificou-se que, no inverno o DOA não foi alterado pela distância de transporte. Enquanto que no verão, o DOA variou de 0,16% a 0,27 % nos lotes LSB e de 0,12% a 0,17% nos lotes LCB. No verão, foram observados menores valores de DOA nos lotes LCB nas duas distâncias de transporte indicando que o banho após o carregamento reduziu a mortalidade dos frangos durante o transporte.
The aim of this work was to evaluate the influence of the management conditions and distance to a commercial plant on chicken broilers Dead on Arrival (DOA). This work was conducted in the winter and summer seasons of 2008 in a commercial plant. In the winter season, the transport distances were 15 and 57 km, and in the summer season the distances were 15 and 55 km from the farm to the slaughterhouse and the experiments were carried out in duplicate. In the summer, to evaluate the effect of water bath over the birds before the actual transportation, a group of two trucks were submitted to a water bath (GWthB) and the other without water bath treatment (GWoutB). The results showed that in the winter, the DOA was not influenced to distance of transport. In the summer, the DOA values for GWthB group varied from 0.12 to 0.17% while for the GWoutB the DOA values ranged from 0.16 to 0.27% indicating that the bath treatment after broilers truck loading and before transportation reduced broiler chicken mortality.
Assuntos
Animais , Banhos/veterinária , Galinhas , Mortalidade , Abate de AnimaisRESUMO
The aim of this work was to evaluate the influence of the management conditions and distance to a commercial plant on chicken broilers Dead on Arrival (DOA). This work was conducted in the winter and summer seasons of 2008 in a commercial plant. In the winter season, the transport distances were 15 and 57 km, and in the summer season the distances were 15 and 55 km from the farm to the slaughterhouse and the experiments were carried out in duplicate. In the summer, to evaluate the effect of water bath over the birds before the actual transportation, a group of two trucks were submitted to a water bath (GWthB) and the other without water bath treatment (GWoutB). The results showed that in the winter, the DOA was not influenced to distance of transport. In the summer, the DOA values for GWthB group varied from 0.12 to 0.17% while for the GWoutB the DOA values ranged from 0.16 to 0.27% indicating that the bath treatment after broilers truck loading and before transportation reduced broiler chicken mortality.
O objetivo deste trabalho foi avaliar o efeito da distância de transporte e do banho após o carregamento sobre a mortalidade de frangos na chegada ao abatedouro, denominada Mortalidade na Chegada, do ingles Dead on Arrival DOA. O estudo foi conduzido no inverno e no verão de 2008 em abatedouro comercial. No inverno, as distâncias de transporte foram de 15 e 57 km, e no verão foram de 15 e 55 km, sendo os experimentos realizados em duplicata. No verão, para avaliar o efeito do banho sobre os frangos após o carregamento no caminhão, foram avaliados dois lotes em cada distância, lote sem banho (LSB) e lote com banho (LCB). Pelos resultados verificou-se que, no inverno o DOA não foi alterado pela distância de transporte. Enquanto que no verão, o DOA variou de 0,16% a 0,27 % nos lotes LSB e de 0,12% a 0,17% nos lotes LCB. No verão, foram observados menores valores de DOA nos lotes LCB nas duas distâncias de transporte indicando que o banho após o carregamento reduziu a mortalidade dos frangos durante o transporte.
RESUMO
The aim of this work was to evaluate the influence of the management conditions and distance to a commercial plant on chicken broilers Dead on Arrival (DOA). This work was conducted in the winter and summer seasons of 2008 in a commercial plant. In the winter season, the transport distances were 15 and 57 km, and in the summer season the distances were 15 and 55 km from the farm to the slaughterhouse and the experiments were carried out in duplicate. In the summer, to evaluate the effect of water bath over the birds before the actual transportation, a group of two trucks were submitted to a water bath (GWthB) and the other without water bath treatment (GWoutB). The results showed that in the winter, the DOA was not influenced to distance of transport. In the summer, the DOA values for GWthB group varied from 0.12 to 0.17% while for the GWoutB the DOA values ranged from 0.16 to 0.27% indicating that the bath treatment after broilers truck loading and before transportation reduced broiler chicken mortality.
O objetivo deste trabalho foi avaliar o efeito da distância de transporte e do banho após o carregamento sobre a mortalidade de frangos na chegada ao abatedouro, denominada Mortalidade na Chegada, do ingles Dead on Arrival DOA. O estudo foi conduzido no inverno e no verão de 2008 em abatedouro comercial. No inverno, as distâncias de transporte foram de 15 e 57 km, e no verão foram de 15 e 55 km, sendo os experimentos realizados em duplicata. No verão, para avaliar o efeito do banho sobre os frangos após o carregamento no caminhão, foram avaliados dois lotes em cada distância, lote sem banho (LSB) e lote com banho (LCB). Pelos resultados verificou-se que, no inverno o DOA não foi alterado pela distância de transporte. Enquanto que no verão, o DOA variou de 0,16% a 0,27 % nos lotes LSB e de 0,12% a 0,17% nos lotes LCB. No verão, foram observados menores valores de DOA nos lotes LCB nas duas distâncias de transporte indicando que o banho após o carregamento reduziu a mortalidade dos frangos durante o transporte.
RESUMO
The objective of this work was to investigate the effect of road transportation conditions on the occurrence of broiler PSE-(Pale, Soft, Exudative) and DFD-like (Dark, Firm, Dry) meats in the Brazilian commercial slaughterhouse plant. Samples of Pectoralis major m from 47-day-old broilers of commercial lineage were analyzed. The results indicated that water-bathing birds just before journey over 3.0km promoted the occurrence of 46.0 percent of PSE and 4.0 percent of DFD-like meat, while birds under non-water bathing conditions presented 14.7 and 2.0 percent, respectively. For a distance of 68.0km, the occurrences of PSE-and DFD-like meat were 44.0 and 0.0 percent under water bathing conditions, and 52.0 and 0.0 percent without water bathing, respectively. Water bathing at the farm was a critical manoeuvre for increasing the unfavourable truck microenvironment for short journey, whereas conversely for longer journey it was less stressful influencing the broiler breast meat quality.
O objetivo deste trabalho foi investigar o efeito das condições do transporte na ocorrência das carnes PSE (Pale, Soft, Exudative) e a-DFD (Dark, Firm, Dry) de frangos nas condições brasileiras em uma planta de um frigorífico comercial. Foram analisadas amostras de peito de frango (Pectoralis major m.) da ave de 47 dias de linhagem comercial. Os resultados indicaram que o banho dos frangos imediatamente antes da viagem de 3,0km promoveu a ocorrência de 46,0 por cento de PSE e 4,0 por cento de a-DFD enquanto que frangos sem banho apresentaram 14,7 e 2,0 por cento, respectivamente. Para uma distância de 68,0km, a ocorrência de carnes PSE e a-DFD foram 44,0 e 0,0 por cento, respectivamente, de aves que sofreram banho e 52,0 e 0,0 por cento sem banho, respectivamente. O banho ainda na granja foi uma atividade crítica aumentando as condições desfavoráveis no microambiente do caminhão para curtas distâncias e contrariamente para distâncias longas foi menos estressante influenciando na qualidade do peito do frango.
RESUMO
This work was carried out in order to evaluate whether the functional properties of broiler meat are affected by the factors that lead to PSE (Pale, Soft, Exudative). PSE meat was characterized by pH and L* values, and mortadella formulations consisted of isolated soy protein, sodium tripolyphosphate, and cassava starch in addition to PSE and normal meats. The functionality of the meat was evaluated by examining the water holding capacity (WHC), texture profile, emulsion stability (ES) and color of the final products. The results show that in mortadella prepared with PSE meat, the protein denaturation affected the ES. Additives are necessary to enhance the functional properties of PSE meat.
Este trabalho foi realizado para avaliar o efeito dos fatores que conduzem à formação das carnes PSE (Pale, Soft, Exudative) sobre as propriedades funcionais da carne de frango. Carnes PSE foram caracterizadas pelos valores de pH e L* e as formulações da mortadela consistiram de proteina isolada de soja, trifosfato de sódio, amido de mandioca e a adição das carnes normal e PSE. A funcionalidade da carne foi avaliada medindo a capacidade de retenção de água (CRA), perfil de textura, estabilidade de emulsão (EE), e cor dos produtos finais. Os resultados mostraram que na mortadela preparada com carnes PSE, as proteinas desnaturadas afetaram a EE. Aditivos são necessários para potencializar as propriedades funcionais da carne PSE.