Sex and slaughter weight on carcass traits and non-carcass components of horses / Sexo e peso de abate sobre as características de carcaça e componentes não-carcaça de cavalos

ABSTRACT: The study evaluated the effect of sex and slaughter weight on carcass traits and non-carcass components of 1,489 horses (739 geldings and 750 females, classified into eight groups according to their weight). Data were analyzed under a completely randomized design. Geldings had a higher (P < 0.05) hot carcass yield (HCY) and cold carcass yield (CCY) than females; however, fat yellowness values (b*) were greater (P < 0.05) in females. Slaughter weight (SW) affected the carcass characteristics. Hot carcass weight (HCW), cold carcass weight (CCW), HCY, and CCY increased (P < 0.05) in accordance with slaughter weight, while cool loss percentage (CL%) was lower (P < 0.05) in horses weighing more than 300 kg. In addition, the non-carcass components decreased (P < 0.05) as the weight of the horses increased. In conclusion, sex and body weight are factors to consider in the production of equine meat since they affect carcass characteristics and non-carcass components.

RESUMO: O estudo teve como objetivo avaliar o efeito do sexo e do peso ao abate sobre as características de carcaça e componentes não-carcaça de 1.489 cavalos (739 machos castrados e 750 fêmeas, classificados em oito grupos de acordo com o peso). Os dados foram analisados em um desenho inteiramente casualizado. Os semeadores apresentaram maior rendimento de carcaça quente (HCY) e fria (CCY) do que as fêmeas, porém o amarelecimento da gordura (b*) foi maior nas fêmeas. O peso ao abate (SW) afetou as características de carcaça. HCW, CCW, HCY e CCY aumentaram de acordo com o peso de abate, enquanto CL% foi menor em equinos com peso superior a 300 kg. Além disso, os componentes não-carcaça diminuíram com o aumento do peso dos cavalos. Em conclusão, sexo e peso corporal são fatores a serem considerados na produção de carne equina, uma vez que afetam as características da carcaça e seus componentes.

Sex and slaughter weight on carcass traits and non-carcass components of horses / Sexo e peso de abate sobre as características de carcaça e componentes não-carcaça de cavalos

The study evaluated the effect of sex and slaughter weight on carcass traits and non-carcass components of 1,489 horses (739 geldings and 750 females, classified into eight groups according to their weight). Data were analyzed under a completely randomized design. Geldings had a higher (P < 0.05) hot carcass yield (HCY) and cold carcass yield (CCY) than females; however, fat yellowness values (b*) were greater (P < 0.05) in females. Slaughter weight (SW) affected the carcass characteristics. Hot carcass weight (HCW), cold carcass weight (CCW), HCY, and CCY increased (P < 0.05) in accordance with slaughter weight, while cool loss percentage (CL%) was lower (P < 0.05) in horses weighing more than 300 kg. In addition, the non-carcass components decreased (P < 0.05) as the weight of the horses increased. In conclusion, sex and body weight are factors to consider in the production of equine meat since they affect carcass characteristics and non-carcass components.

O estudo teve como objetivo avaliar o efeito do sexo e do peso ao abate sobre as características de carcaça e componentes não-carcaça de 1.489 cavalos (739 machos castrados e 750 fêmeas, classificados em oito grupos de acordo com o peso). Os dados foram analisados em um desenho inteiramente casualizado. Os semeadores apresentaram maior rendimento de carcaça quente (HCY) e fria (CCY) do que as fêmeas, porém o amarelecimento da gordura (b*) foi maior nas fêmeas. O peso ao abate (SW) afetou as características de carcaça. HCW, CCW, HCY e CCY aumentaram de acordo com o peso de abate, enquanto CL% foi menor em equinos com peso superior a 300 kg. Além disso, os componentes não-carcaça diminuíram com o aumento do peso dos cavalos. Em conclusão, sexo e peso corporal são fatores a serem considerados na produção de carne equina, uma vez que afetam as características da carcaça e seus componentes.

Carcass characteristics and fatty acid profile of Santa Inês lamb fed banana leftovers

The use of new feed resources, particularly local agroindustrial byproducts, such as banana, may be an option for replacing those traditionally used for sheep feed to reduce production costs. Thus, the aim of this study was to evaluate the dietary effects of replacing corn bran with banana leftovers on performance, carcass, non-carcass components, meat traits, and fatty acid profile of Santa Inês lambs. Twenty-four Santa Inês female lambs with an average weight of 23.73 kg were fed diets containing 60 % coast cross hay and 40 % concentrate (30 % corn bran and 10 % soybean meal). Treatments consisted of corn bran replaced by banana leftovers at rates of 0, 25, 50, and 75 % on a dry matter basis. The experiment lasted 120 days. Animals were slaughtered and carcasses and non-carcass components were evaluated. The half-carcasses were weighed and sectioned into commercial cuts. The 12th and 13th ribs were dissected to collect bones, muscle and fat proportions. Cooking loss, color, shear force and sarcomere length were measured. Fatty acid profiles were obtained by gas chromatography. Hot and cold carcass weight, leg, neck, lung, loin eye area, fat thickness, initial sample weight of the 12th and 13th ribs, fat and bone, presented a negative linear effect of banana leftovers replacing corn in the diet. Loin, fat thickness, cooking loss and carcass redness showed a negative quadratic effect, while full and empty abomasum, full omasum, sarcomere length and yellowness presented a positive quadratic effect. Replacement of up to 75 % of corn bran by banana leftovers did not interfere in the intake, performance, meat traits and the fatty acid profile of lambs. The use of banana leftovers may be an alternative for reducing animal production costs.

Carcass characteristics and fatty acid profile of Santa Inês lamb fed banana leftovers

The use of new feed resources, particularly local agroindustrial byproducts, such as banana, may be an option for replacing those traditionally used for sheep feed to reduce production costs. Thus, the aim of this study was to evaluate the dietary effects of replacing corn bran with banana leftovers on performance, carcass, non-carcass components, meat traits, and fatty acid profile of Santa Inês lambs. Twenty-four Santa Inês female lambs with an average weight of 23.73 kg were fed diets containing 60 % coast cross hay and 40 % concentrate (30 % corn bran and 10 % soybean meal). Treatments consisted of corn bran replaced by banana leftovers at rates of 0, 25, 50, and 75 % on a dry matter basis. The experiment lasted 120 days. Animals were slaughtered and carcasses and non-carcass components were evaluated. The half-carcasses were weighed and sectioned into commercial cuts. The 12th and 13th ribs were dissected to collect bones, muscle and fat proportions. Cooking loss, color, shear force and sarcomere length were measured. Fatty acid profiles were obtained by gas chromatography. Hot and cold carcass weight, leg, neck, lung, loin eye area, fat thickness, initial sample weight of the 12th and 13th ribs, fat and bone, presented a negative linear effect of banana leftovers replacing corn in the diet. Loin, fat thickness, cooking loss and carcass redness showed a negative quadratic effect, while full and empty abomasum, full omasum, sarcomere length and yellowness presented a positive quadratic effect. Replacement of up to 75 % of corn bran by banana leftovers did not interfere in the intake, performance, meat traits and the fatty acid profile of lambs. The use of banana leftovers may be an alternative for reducing animal production costs.(AU)

Body weight components of Nellore steers finished in tropical pastures

The aim of this study was to evaluate the effect of increasing levels of supplementation on body weight components of Nellore cattle grazing in Urochloa brizantha. Twenty-four steers with initial body weight (BW) of 371 ± 14 kg and average age of 26 months were used. Four animals were slaughtered at the beginning of the experiment as a reference and the others were distributed in 4 treatments [0.0% (mineral salt), 0.3%, 0.6% and 0.9% supplement BW]. The slaughter of the experimental group was performed when the animals reached 450 kg and the body weight components were weighed. Data were submitted to analysis of variance and regression. The increase in supplementation level reduced (p 0.05) pasture dry matter intake, but did not influence (p > 0.05) on empty body weight (EBW) (380.3 kg) and cold carcass weight (CCW) (247.5 kg). The weights of skin, liver, rumen and fat were not influenced (p > 0.05) by supplementation level. The animals gained, on average, 75.3 kg EBW and 50.7 kg CCW, but the treatments did not influence (p > 0.05) the gains of body weight components. The increasing of energetic-protein supplement level for Nellore steers in Urochloa brizantha pasture does not affect carcass and non-carcass components.(AU)

Body weight components of Nellore steers finished in tropical pastures

The aim of this study was to evaluate the effect of increasing levels of supplementation on body weight components of Nellore cattle grazing in Urochloa brizantha. Twenty-four steers with initial body weight (BW) of 371 ± 14 kg and average age of 26 months were used. Four animals were slaughtered at the beginning of the experiment as a reference and the others were distributed in 4 treatments [0.0% (mineral salt), 0.3%, 0.6% and 0.9% supplement BW]. The slaughter of the experimental group was performed when the animals reached 450 kg and the body weight components were weighed. Data were submitted to analysis of variance and regression. The increase in supplementation level reduced (p 0.05) pasture dry matter intake, but did not influence (p > 0.05) on empty body weight (EBW) (380.3 kg) and cold carcass weight (CCW) (247.5 kg). The weights of skin, liver, rumen and fat were not influenced (p > 0.05) by supplementation level. The animals gained, on average, 75.3 kg EBW and 50.7 kg CCW, but the treatments did not influence (p > 0.05) the gains of body weight components. The increasing of energetic-protein supplement level for Nellore steers in Urochloa brizantha pasture does not affect carcass and non-carcass components.

Inclusion of liver in meat products from sheep / Inclusão de fígado em produtos elaborados com carne ovina

The objective of this study was to evaluate the physicochemical (pH, color, water retention capacity, cooking losses, shear force, iron content, and lipid oxidation) and sensory characteristics of koftas and sausages prepared from lamb meat and enriched with sheep liver. Meat from eight lambs weaned at 60 days and slaughtered at a body weight of 32.0 ± 0.2 kg was used. Percentages of 10 and 20% sheep liver were included in koftas and of 15 and 30% in sausages. A completely randomized experimental design was used and the data were submitted to analysis of variance and regression. The inclusion of liver in koftas linearly increased pH (P=0.001) and shear force (P=0.028), and reduced luminosity (P=0.005) and lipid oxidation at the time of (P=0.001) and 24 hours after (P=0.004) fabrication of the products. In sausages, the inclusion of liver linearly increased shear force (P=0.03). The inclusion of liver exerted decreasing linear effects on the scores related to the flavor of kofta and sausage products (P=0.001 and 0.033, respectively) and a quadratic effect (P=0.008) on the overall acceptance of sausages. Although the inclusion of liver altered some relevant quality-related attributes of sheep koftas and sausages, the physicochemical and sensory characteristics were not compromised.

Este trabalho objetivou avaliar características físico-químicas (pH, cor, capacidade de retenção de água, perdas de peso por cocção, força de cisalhamento, quantidade de ferro e oxida-ção lipídica) e sensoriais de kaftas e linguiças confeccionadas com carne de cordeiros e enriqueci-das com fígado ovino. Utilizou-se carne de oito cordeiros desmamados aos 60 dias e abatidos aos 32,0 ± 0,2 kg de peso corporal. Foram incluídos 10 e 20% de fígado ovino nas kaftas, e 15 e 30% nas linguiças.O delineamento experimental utilizado foi o inteiramente casualizado sendo os dados submetidos à análise de variância e regressão. A inclusão de fígado nas kaftas elevou linearmente os valores de pH (P=0,001) e força de cisalhamento (P=0,028), diminuiu a luminosidade (P=0,005) e os valores de oxidação lipídica no momento (P=0,001) e 24 horas (P=0,004) após a confecção dos produtos. Nas linguiças, a inclusão de fígado causou efeito linear crescente para a força de cisa-lhamento (P=0,030). As inclusões de fígado causaram efeitos lineares decrescentes nas notas rela-cionadas à variável sabor dos produtos kafta e linguiça (P=0,001 e 0,033, respectivamente), e efeito quadrático na aceitação global (P=0,008) das linguiças. Apesar da inclusão de fígado alterar alguns atributos relevantes de qualidade das kaftas e linguiças ovinas, as características físico-químicas e sensoriaisnão foram comprometidas.

Inclusion of liver in meat products from sheep / Inclusão de fígado em produtos elaborados com carne ovina

The objective of this study was to evaluate the physicochemical (pH, color, water retention capacity, cooking losses, shear force, iron content, and lipid oxidation) and sensory characteristics of koftas and sausages prepared from lamb meat and enriched with sheep liver. Meat from eight lambs weaned at 60 days and slaughtered at a body weight of 32.0 ± 0.2 kg was used. Percentages of 10 and 20% sheep liver were included in koftas and of 15 and 30% in sausages. A completely randomized experimental design was used and the data were submitted to analysis of variance and regression. The inclusion of liver in koftas linearly increased pH (P=0.001) and shear force (P=0.028), and reduced luminosity (P=0.005) and lipid oxidation at the time of (P=0.001) and 24 hours after (P=0.004) fabrication of the products. In sausages, the inclusion of liver linearly increased shear force (P=0.03). The inclusion of liver exerted decreasing linear effects on the scores related to the flavor of kofta and sausage products (P=0.001 and 0.033, respectively) and a quadratic effect (P=0.008) on the overall acceptance of sausages. Although the inclusion of liver altered some relevant quality-related attributes of sheep koftas and sausages, the physicochemical and sensory characteristics were not compromised.(AU)

Este trabalho objetivou avaliar características físico-químicas (pH, cor, capacidade de retenção de água, perdas de peso por cocção, força de cisalhamento, quantidade de ferro e oxida-ção lipídica) e sensoriais de kaftas e linguiças confeccionadas com carne de cordeiros e enriqueci-das com fígado ovino. Utilizou-se carne de oito cordeiros desmamados aos 60 dias e abatidos aos 32,0 ± 0,2 kg de peso corporal. Foram incluídos 10 e 20% de fígado ovino nas kaftas, e 15 e 30% nas linguiças.O delineamento experimental utilizado foi o inteiramente casualizado sendo os dados submetidos à análise de variância e regressão. A inclusão de fígado nas kaftas elevou linearmente os valores de pH (P=0,001) e força de cisalhamento (P=0,028), diminuiu a luminosidade (P=0,005) e os valores de oxidação lipídica no momento (P=0,001) e 24 horas (P=0,004) após a confecção dos produtos. Nas linguiças, a inclusão de fígado causou efeito linear crescente para a força de cisa-lhamento (P=0,030). As inclusões de fígado causaram efeitos lineares decrescentes nas notas rela-cionadas à variável sabor dos produtos kafta e linguiça (P=0,001 e 0,033, respectivamente), e efeito quadrático na aceitação global (P=0,008) das linguiças. Apesar da inclusão de fígado alterar alguns atributos relevantes de qualidade das kaftas e linguiças ovinas, as características físico-químicas e sensoriaisnão foram comprometidas.(AU)

CARACTERÍSTICAS PÓS-ABATE DE NOVILHAS SUPLEMENTADAS COM DIFERENTES FONTES ENERGÉTICAS EM PASTAGEM DE TIFTON 85

O presente estudo teve por objetivo avaliar o efeito de três fontes energéticas distintas, sobre as características da carcaça, os componentes não carcaça e a qualidade da carne de novilhas terminadas em pastagem de Tifton 85. Foram utilizadas 30 novilhas, com idade e peso inicial de 26 meses e 274,5 kg, oriundas do cruzamento rotativo entre as raças Charolês e Nelore. O delineamento experimental utilizado foi o inteiramente casualizado. Os animais foram distribuídos uniformemente quanto ao peso e grupo genético em três fontes energéticas: grão de milho, aveia branca ou cevada, o nível de suplementação foi de 1% PV. O peso e rendimento de carcaça fria médio foi de 218,2 kg e 53,5%. A espessura de gordura subcutânea foi de 4,37 mm, as medidas métricas, percentuais de tecidos, de cortes primários e características sensoriais da carne não foram alteradas pelas estratégias de alimentação. Os pesos de abate (PA), peso de corpo vazio (PCVZ) e a relação PCVZ/PA foram similares entre as estratégias de suplementação. O peso total de órgãos relativo a 100 kg de PCVZ, foi maior para as novilhas alimentadas com milho em relação as que receberam aveia branca, com comportamento intermediário para as fêmeas que receberam cevada, 3,43; 3,22 e 3,29%, respectivamente. Já o peso de rúmen-retículo relativo a 100 kg de PCVZ foi 11% superior para as fêmeas que receberam cevada em relação as que receberam aveia branca, e comportamento intermediário para grão de milho,1,72; 1,55 e 1,63% PCVZ, respectivamente. O peso do trato gastrointestinal, componentes periféricos e gorduras descartadas não diferiram entre as fontes energéticas utilizadas. O grão de aveia branca ou cevada pode substituir o grão de milho e proporcionar adequado desenvolvimento da carcaça de bovinos terminados em pastagem de Tifton 85.

The objective of the present study was to evaluate the effect of three different energy sources on carcass characteristics, non-carcass components and meat quality of heifers finished in Tifton 85 pasture. Thirty heifers were used, with age and initial weight of 26 months and 274.5 kg, originating from the rotational cross between the Charolais and Nelore races. The experimental design was completely randomized. The animals were distributed evenly for weight and genetic group in three energy sources: corn grain, white oats or barley, the level of supplementation was 1% PV. The mean cold carcass weight and yield was 218.2 kg and 53.5%. The subcutaneous fat thickness was 4.37 mm, the metric measures, percentage of tissues, primary cuts and sensorial characteristics of the meat were not altered by feeding strategies. The slaughter weights (SW), empty body weight (EBW) and the EBW/SW ratio were similar between the supplementation strategies. The total organ weight of 100 kg EBW was higher for heifers fed corn than those receiving white oats, with intermediate behavior for females receiving barley, 3.43; 3.22 and 3.29%, respectively. The weight of rumen-reticulum relative to 100 kg of EBW was 11% higher for females that received barley than those that received white oats, and intermediate behavior for corn, 1.72; 1.55 and 1.63% PCVZ, respectively. The weight of the gastrointestinal tract, peripheral components and discarded fats did not differ between the energy sources used. White oat grain or barley may replace corn grain and provide adequate development of the carcass of beef cattle in Tifton 85 pasture.

Glicerina bruta no suplemento e seus efeitos nas características da carcaça e nos componentes do peso vivo de cordeiros lactentes / Crude glycerin in supplement and its effects on carcass characteristics and live weight components in suckling lambs

Objetivou-se avaliar o efeito da porcentagem de glicerina bruta em suplementos sobre as características da carcaça e os componentes do peso vivo de cordeiros lactentes mantidos em pasto de azevém. Foram utilizados 32 cordeiros lactentes, distribuídos nos tratamentos: 0, 10, 20 e 30% de glicerina bruta na matéria seca, em substituição ao milho, no suplemento isoproteico (18% de PB na matéria seca) fornecido diariamente em quantidade equivalente a 2% do peso corporal. As porcentagens de glicerina bruta tiveram efeito linear decrescente sobre peso de carcaça quente, peso de carcaça fria, rendimento de carcaça quente e rendimento de carcaça fria, enquanto as perdas pelo jejum aumentaram. O peso da paleta e o peso do costilhar diminuíram, enquanto a proporção de perna aumentou com o incremento de glicerina bruta no suplemento. Na composição tecidual da paleta, observou-se que a gordura subcutânea, a gordura intermuscular e a gordura total da paleta decresceram linearmente segundo as porcentagens de glicerina bruta. Sobre os componentes do peso vivo, observaram-se diferenças nas proporções de pele, rúmen, omaso, intestino grosso, que aumentaram, enquanto a de gordura renal diminuiu linearmente. Conclui-se que o uso de glicerina bruta em até 30% em suplemento fornecido em comedouro privativo para cordeiros lactentes mantidos em pasto de azevém interfere nas características da carcaça e nos componentes corporais.(AU)

The objective was to evaluate the effect of crude glycerin levels in supplement on carcass characteristics and live weight components of suckling lambs maintained on ryegrass pasture. Thirty two suckling lambs were used and were distributed among the treatments: 0, 10, 20 and 30% crude glycerin, in replacement of corn, in the isoproteic supplement (18% CP) provided daily in amounts equivalent to 2% of body weight. The levels of crude glycerin had negative linear effects on hot and cold carcass weight, hot and cold carcass yield but an increasing effect was observed on gastrointestinal content and fasting losses. The shoulder and rib weights decreased, while the leg proportion increased with the elevation of crude glycerin use. In the tissue composition of the shoulder, it was observed that the subcutaneous fat, intermuscular fat and total fat decreased linearly according to the levels of crude glycerin. Regarding body weight components, differences were observed in the proportions of skin, rumen, omasum, large intestine, which increased, while the kidney fat decreases linearly. The use of crude glycerin in up to 30% in the supplement provided in creep feeding for suckling lambs kept in ryegrass pasture influences carcass characteristics and corporal components.(AU)