| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000435922 |
| ISSN: | 0001-3765 |
| Authors: | Guimaraes, Tiago P1 Restle, Joao2 Moreira, Kíria Karolline G2 Freitas-Neto, Marcondes D. de3 Souza, Leonardo Frederico N4 Moraes, Emerson G4 Fernandes, Juliano José R2 |
| Institutions: | 1Instituto Federal Goiano, Campus Rio Verde, Rio Verde, Goias. Brasil 2Universidade Federal de Goias, Campus Samambaia, Goiania, Goias. Brasil 3Cargil Agricola S.A., Uberlandia, Minas Gerais. Brasil 4Qualitas Melhoramento Genetico, Aparecida de Goiania, Goias. Brasil |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 3 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | This study aimed to evaluate the performance in feedlot and temperament of Nellore bulls classified by residual feed intake. The residual feed intake was calculated as the difference between the observed and predicted dry matter intake. Bulls classified as low residual feed intake had lower dry matter intake (kg day−1) and dry matter intake (g kg−1 d−1) of body weight, and were more efficient in feed conversion ratio than those classified as medium and high. The average daily gain didn’t differ among residual feed intake classes and was 1.69 kg day−1, 1.82 kg day−1 and 1.71 kg day−1 for bulls classified as low, medium, or high, respectively. The residual feed intake was positively associated with dry matter intake, feed conversion ratio and subcutaneous fat thickness. The subcutaneous fat thickness was lower in bulls classified as low residual feed intake than in those with medium and high. No differences were observed in flight speed and reactivity score among residual feed intake classes. Overall, we concluded that bulls classified as low residual feed intake consumed less dry matter than high, with no differences in average daily gain, temperamentand had better feed efficiency, albeit their subcutaneous fat thickness was lower |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Bovinos, Nutrición animal, Ganado estabulado, Eficiencia alimenticia, Grasa subcutánea, Temperamento, Toros, Nellore |
| Keyword: | Bovines, Animal nutrition, Feedlot cattle, Feed efficiency, Subcutaneous fat, Temperament, Bulls, Nellore |
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