Use of ractopamine during compensatory gain of finishing pigs on carcass and meat performance and quality

Abstract

The objective of this study was to evaluate the effects of compensatory gain associated with the use of 10ppm ractopamine after a period of feed restriction in finishing pigs on performance, carcass and meat quality. Twenty castrated males and 20 females, at 110 days of age and 66.137±6.13kg live weight, were submitted to four treatments using a 2 x 2 factorial design (fed ad libitum or with 20% restriction between 021 days of age and fed with or without 10ppm ractopamine for 2242 days of experimentation), with 10 replicates (animals). There was no interaction between the factors for any of the evaluated parameters. Animals treated with ractopamine presented better weight gain (1.083 versus 1.259kg), feed conversion (2.910 versus 2.577), warm and cold carcass weight (86.08 versus 89.00 and 83.46 versus 87.20kg, respectively), loin depth (63.02 versus 68.40mm), loin eye area (41.43 versus 46.59mm 2 ) and muscle fiber diameter (27.48 versus 35.85μm). Animals submitted to feed restriction followed by ad libitum feed presented compensatory gain without losses to carcass and meat characteristics, but with a reduction in the ethereal extract (2.19 versus 1.64%) and lower water loss due to thawing in the meat (11.35 versus 9.42%). The effects of compensatory gain after food restriction and ractopamine are independent of the parameters evaluated.Keywords: swine, beta-adrenergic, fat, food management, weight gain (86,08 versus 89,00 e 83,46 versus 87,20kg, respectivamente), profundidade do lombo (63,02 versus 68,40mm), área de olho de lombo (41,43 versus 46,59mm 2 ) e diâmetro de fibras musculares (27,48 versus 35,85µm Palavras-chave: suíno, beta-adrenérgico, ganho de peso, gordura, manejo alimentar RESUMO Objetivou

Utilização Da Ractopamina Na Melhoria Da Proporção Gordura/Carne Proveniente Da Suinocultura Brasileira

“…O atual estado da arte (2016-2022) apresenta poucos trabalhos (AMIN et al, 2017;BARBOSA et al, 2017;MORAES et al, 2020;SILVA et al, 2018) provenientes de estudos brasileiros que demonstraram a influência da RAC sobre o desenvolvimento do suíno antes do abate. Além disso, não foi encontrado nenhum trabalho de revisão que demonstrasse o aumento da produção de carne suína com o uso de RAC no rebanho para abate.…”

Reproducible Molecularly Imprinted Piezoelectric Sensor for Accurate and Sensitive Detection of Ractopamine in Swine and Feed Products

“…It has been proven that RAC can be retained in animals and subsequently enters the human body through the food chain, causing cumulative toxicity. Thus, when the accumulated RAC dose exceeds a certain level, toxic reactions, such as triggering muscle tremor, tachycardia, and muscle pain, may occur [ 6 , 7 , 8 ]. To avoid the potential risk of RAC to human health, many countries (including the USA, China and the European Union) and organizations have set strict regulations for RAC and other β-adrenergic agonists, with zero tolerance in animal feed or processing [ 9 , 10 ].…”