Chemical Composition And Ph Of The Meat Of Broilers Submitted To Pre-slaughter Heat Stress

In order to evaluate the chemical composition and pH of chicken meat subjected to heat stress during the pre-slaughter rest time, an experiment was conducted in a slaughterhouse. Twenty-five birds were randomly selected and housed in rooms without air conditioning for a 3-hour period, with an average temperature of 33°C and relative humidity of 83%. After slaughter, the carcasses were deboned and prime cuts were chilled (between 0 and 4 °C) for 24 hours for analysis of moisture levels, protein, fat, ash, and pH. The humidity values were 72.80, 71.47, and 70.30%, protein values were 16.81, 14.90, and 15.10%, lipid values were 0.78, 3.30, and 5.80%, ash values were 0.81, 0.88, and 0.89%, and pH values were 5.30, 6.10, and 6.54 for breast, thigh, and drumstick, respectively. Heat stress for 3 hours before slaughter led to changes in the chemical composition and pH of the chicken, which establishes an anomaly in the flesh of the PSE type (pale, soft, and exudative). It is evident that pre-slaughter management is important to ensure animal welfare and consequently high meat quality.44939

Digestibilidade de subprodutos agroindustriais na alimentação de cavalos

It was aimed to determine the apparent digestibility for equines of nutrients in diets containing different agro industrial by-products. Five Creole horses were use, housing alloted in individual metabolism cages, following statistical latin square design (5x5). The treatments were constituted in five experimental diets, a reference diet (DR) and four diets tests containing 30% substitution level (kg/kg) for the following alternative foods: soybean residue (RS), soybean hulls (CS), wheat grain hulls (CT) and corn grain hulls (CM). The best means values for the parameters dry matter, crude protein, ether extract, mineral matter, neutral and acid detergent fiber was observed with the dietary treatments CM (68.05%), DR (61.38%), RS (64.50%), CS (60.33%), CM (84.32%) and CS (60.62%), respectively. In spite of the highest means values for digestibility of the fibrous fraction have been obtained with the CM and CS diets, these proportions result in the lowest means values to the digestibility for the protein fraction.Objetivou-se determinar a digestibilidade aparente dos nutrientes em dietas contendo diferentes subprodutos agroindustriais na alimentação de eqüinos adultos. Foram utilizados cinco cavalos crioulos, alojados em gaiolas de metabolismo individuais, seguindo delineamento estatístico em quadrado latino (5x5). Os tratamentos constituíram-se em cinco dietas experimentais, uma dieta referência (DR) e quatro dietas testes contendo nível de substituição em 30% (kg/kg) para os seguintes alimentos alternativos: resíduo de soja (RS), casca de soja (CS), casca de trigo (CT) e casca de milho (CM). Os melhores valores médios para os parâmetros matéria seca, proteína bruta, extrato etéreo, matéria mineral, fibra em detergente neutro e ácido foram observados com os tratamentos dietéticos CM (68,05%), DR (61,38%), RS (64,50%), CS (60,33%), CM (84,32%) e CS (60,62%), respectivamente, pelo teste SNK a 5% probabilidade. Apesar dos maiores valores médios para digestibilidade da fração fibrosa terem sido obtidos com as dietas CM e CS, estas propiciaram os menores valores para digestibilidade da fração protéica