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| Silva,Saulo da Luz e; Titto,Evaldo Antonio Lencioni; Leme,Paulo Roberto; Martello,Luciane Silva; Pereira,Angélica Simone Cravo; Titto,Rafael Martins; Nogueira Filho,José Carlos Machado; Luchiari Filho,Albino. |
| There is a paucity of information in the literature on body composition changes in Nellore cattle and its crosses, mainly on heifers and intact males. Ultrasound is a useful, low cost tool to easily obtain this information, with minimal animal stress. Effects of sex and days on feed on live weight (LW) and ultrasound Longissimus muscle area (ULMA) and subcutaneous fat thickness (UFAT) measurements were evaluated in F1 Piedmont <FONT FACE=Symbol>´</FONT> Nelore, 27 heifers (HF) and 27 intact males (IM). HF and IM had an initial LW of 256 ± 5.6 and 265 ± 5.6 kg, respectively, and were fed a diet containing 77% TDN for 131 days. LW, ULMA, and UFAT were evaluated at 28-d intervals. Interactions between sex and days on feed were found for all traits... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Backfat thickness; Beef; In vivo evaluation; Ribeye area. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500002 |
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| Suguisawa,Liliane; Mattos,Wilson Roberto Soares; Oliveira,Henrique Nunes de; Silveira,Antônio Carlos; Arrigoni,Mário de Beni; Haddad,Cláudio Maluf; Chardulo,Luis Artur Loyola; Martins,Cyntia Ludovico. |
| Considerable resources have been allocated to support research in the development of non-invasive and non-destructive techniques for carcass composition and quality evaluation. Ultrasonography is a reliable and relatively low-cost technique that can be used. In the present study, real-time ultrasonography was used to predict ribeye area (REA) and subcutaneous fat thickness (FT) in live animals as compared to carcass measurements. Animals used were 115 yearling bull calves (initial body weight, 329 kg), kept under feedlot conditions, of four genetic groups (30, ½ Angus x Nellore; 30, ½ Canchim x Nellore; 30, ½ Simmental x Nellore, and 25 Nellore), and two finishing frame sizes (small and large). Four ultrasonographic measurements were taken every 28 days... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Ribeye area; Fat thickness; Growth; Cross breeds. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400026 |
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