Growth Performance, Carcass Characteristics and Meat Quality of Griller-Type Broilers of Four Genetic Lines

Abstract

Griller-type chickens are broilers slaughtered between27and 29 days old weighing 1.3 to 1.5 kg and sold as a whole carcasses. The aim of the present study was to evaluate the growth performance, carcass traits, and meat quality of female broilers of four genetic lines reared for the production of griller-type chickens. A total of 960 broiler chicks was allotted in a randomized block design with four treatments and eight replicates of 30 birds per experimental plot. Each experimental treatment consisted of four different commercial lines, identified as A, B, C and D. The analyzed parameters were weight gain, feed intake, feed conversion ratio, livability, production efficiency index, carcass and cut yields, and meat quality according to breast meat color (L*, a*, b*), water-holding capacity (WHC), cooking losses, and shear force. Weight gain, feed intake, feed conversion ratio, and livability were different (p<0.05) among the lines; however, no differences were observed for the production efficiency index. Results show that lines presented similar performance; however, lines A, B, and C had a better carcass and breast yield, and line A, the best meat quality. Therefore, line A would be the most suitable for the production of griller-type chickens.

Effect of trimmed asparagus by-products supplementation in broiler diets on performance, nutrients digestibility, gut ecology, and functional meat production

“…Average daily feed intake, average body weight gain (BWG), average daily gain (ADG), feed conversion ratio (FCR; feed/gain), and viability were calculated as indicators of production performance following the formulas described by Marcu et al [34]. Production index (PI) was calculated following the formula of Barbosa et al [35]. Economic return indicators, such as feed cost per gain (FCG), salable bird return (SBR), net profit per bird (NPR), and return on investment (ROI) were calculated according to the formulas of Ojediran et al [36].…”

“…Hue angle and chroma were calculated according to Pathare et al [42]. Water holding capacity (WHC), such as drip loss, cooking loss, trawling loss, and roasting loss, was determined according to Barbosa et al [35].…”

Growth response, flock uniformity, organ weight, abdominal fat, carcass yield and hepatic histology of finisher broiler chicken fed toasted pigeon pea seed meal

“…Ojediran et al (2016a) demonstrated that thigh weight was influenced by the lysine portion of the feed. According to Barbosa Filho et al (2017), there is a mathematical connection in carcass yield: low breast yield translates to a higher yield of other parts like shank, back and wings. This is similar to the report of Rance et al (2002).…”

Comportamiento productivo y composición de la canal de la gallina de Guinea (Numida meleagris)

“…Asimismo, se determinó la eficiencia de conversión alimenticia (ECA) con la fórmula utilizada por Sebola et al (2015), la cual se muestra a continuación: = Determinación de rasgos de la canal Esta fase del estudio fue realizada en el Laboratorio de Nutrición Animal del Colegio de Postgraduados, Campus Montecillo, Texcoco, México. Para evaluar las características de la canal se seleccionó aleatoriamente un individuo de cada grupo, considerando cinco hembras y cinco machos previamente sexados a través de evaluación visual y morfométrica (Arhin et al, 2018). Se midió el PC de cada ave y posteriormente fueron sacrificadas de manera convencional (aturdimiento, sangrado, desplume y evisceración).…”

“…Se midió el PC de cada ave y posteriormente fueron sacrificadas de manera convencional (aturdimiento, sangrado, desplume y evisceración). Se determinó el rendimiento de la canal (RCA) a través de la relación del peso de la canal caliente (eviscerado y sin considerar la cabeza, cuello y patas) y el PC del animal*100 (Barbosa-Filho et al, 2017). Para determinar la capacidad de retención de agua (CRA), pH y color se utilizaron las metodologías sugeridas por Guerrero et al (2002), las cuales se describen a continuación: Para evaluar la CRA se utilizaron dos muestras de 5 g/ave del músculo pectoralis major.…”