Medidas in vivo e da carcaça e constituintes não carcaça de ovinos alimentados com diferentes níveis do subproduto agroindustrial da goiaba

Abstract

RESUMO O objetivo com este estudo foi avaliar a biometria, morfometria e os órgãos não-componentes da carcaça de ovinos Santa Inês, em confinamento, alimentadas com níveis crescentes (0; 20; 40 e 60% na matéria seca) de subproduto agroindustrial da goiaba como um substituto para o milho. Quarenta ovinos Santa Inês, machos (não castrados), com média de 17,41 ± 1,27kg de peso corporal (PC) e 120 dias de idade no início do estudo, foram utilizados neste experimento. Os animais foram abatidos aos 32kg ou 105 dias de confinamento. Foi utilizado o delineamento inteiramente casualizado, com dez repetições por tratamento. Os animais submetidos a dietas com 60% de substituição apresentaram menor comprimento corporal (63,20cm), menor altura de cernelha (67,30cm) e de garupa (69,50 cm), baixo escore de condição corporal (2,40 pts), carcaças de conformação inferior (2,25 pts), menor perímetro do tórax (65,10cm) e baixos rendimentos de órgãos como coração (0,52%), baço (0,15%), rins (0,25%) e pulmão (0,89%). O milho pode ser substituído pelo subproduto da goiaba em níveis de até 40%, sendo relevante a obtenção de animais com características corporais desejáveis para produção de carne e com rendimento de órgãos não constituintes da carcaça satisfatórios ao mercado.

In vivo biometry and carcass characteristics of lambs in different finishing systems

“…Thus, the difference found in our study for thoracic perimeter between treatments was not expected since the live weight at slaughtering in the experiment was preset, with no difference for farm live weight. Castro et al (2012), Alves et al (2013), and Silva et al (2016) worked with lambs of the Santa Ines breed and found average values for the thoracic perimeter of 56.14, 65.91, and 71.80 cm, respectively, which are lower than that found in our experiment due to the smaller size breed used by these authors.…”

“…Suckling lambs on pasture reached the slaughter weight in a shorter time (83 days) when compared to suckling lambs in confinement, weaned lambs fed roughage, and weaned lambs fed concentrate, which presented an average of 107 days and a higher bone growth. Silva et al (2016) worked with diets with different substitution levels of corn by guava by-product in lamb finishing and found average values of 71.65 cm for hindlimb height.…”

“…According to Pinheiro et al (2007), in vivo and carcass biometry of sheep is a practical and economical method, allowing comparisons between breed types, weights, and finishing systems. The nutritional status and the measurement of body measures reflect the productive capacity of the animal, being able to reduce economic losses and provide the correct valuation of animals for meat production (SILVA et al, 2016). According to Souza et al (2009), biometric measures also serve to estimate live weight and body compactness of cut sheep, regardless of sex, breed, and age.…”

Replacement of corn silage with spineless cactus in sheep diet: carcass and meat sensory characteristics

“…Several studies found a high and positive correlation between body measurements and body weight at slaughter (Fernandes Junior et al, 2015;Silva et al, 2016;Souza et al, 2014). In these studies, the body measurement with the highest correlation with body weight at slaughter was the chest circumference, and consequently this measurement was the one that best predicted body weight at slaughter.…”

“…According to Gusmão Filho et al 2009, more developed animals tend to obtain greater body length. However, long animals are not always the best conformed, since the conformation is evaluated by the relationship between muscle profiles, and according to Silva et al (2016), short, wide and compact carcasses are recommended. Values of 66.14 cm and 68.14 cm for withers and croup height observed in this experiment were higher than the 59.45 cm and 61.18 cm observed by Moreno et al (2010b), in Ile de France lambs.…”