Days on feed and sex effects on live weight and carcass traits measured by ultrasound
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 (...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade de São Paulo
2005-10-01
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| Series: | Scientia Agricola |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500002&tlng=en |
| _version_ | 1819005883611348992 |
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| author | Saulo da Luz e Silva Evaldo Antonio Lencioni Titto Paulo Roberto Leme Luciane Silva Martello Angélica Simone Cravo Pereira Rafael Martins Titto José Carlos Machado Nogueira Filho Albino Luchiari Filho |
| author_facet | Saulo da Luz e Silva Evaldo Antonio Lencioni Titto Paulo Roberto Leme Luciane Silva Martello Angélica Simone Cravo Pereira Rafael Martins Titto José Carlos Machado Nogueira Filho Albino Luchiari Filho |
| author_sort | Saulo da Luz e Silva |
| collection | DOAJ |
| description | 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 studied. LW increased linearly with days on feed, and IM had greater LW than HF throughout the trial. Mean initial ULMA was 55.8 and 55.5 cm² for HF and IM, respectively, and increased linearly until the end of the experiment (78.7 and 82.8 cm², respectively). IM showed higher ULMA than HF only in the last measurement. Initial UFAT averaged 0.04 and 0.4 mm for IM and HF, respectively, and increased linearly during the feeding period (2.4 and 4.3 mm, respectively). UFAT was higher n HF than in IM during the entire experimental period. IM showed faster growth rates and protein accretion than HF in the Longissimus muscle. HF showed faster subcutaneous fat accretion. |
| first_indexed | 2024-12-20T23:59:52Z |
| format | Article |
| id | doaj.art-1340367b5cc84a68aa922b3069581d98 |
| institution | Directory Open Access Journal |
| issn | 1678-992X |
| language | English |
| last_indexed | 2024-12-20T23:59:52Z |
| publishDate | 2005-10-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Scientia Agricola |
| spelling | doaj.art-1340367b5cc84a68aa922b3069581d982022-12-21T19:22:37ZengUniversidade de São PauloScientia Agricola1678-992X2005-10-01625423426Days on feed and sex effects on live weight and carcass traits measured by ultrasoundSaulo da Luz e Silva0Evaldo Antonio Lencioni Titto1Paulo Roberto Leme2Luciane Silva Martello3Angélica Simone Cravo Pereira4Rafael Martins Titto5José Carlos Machado Nogueira Filho6Albino Luchiari Filho7USPUSPUSPUSPUSPUSPUSPUSPThere 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 studied. LW increased linearly with days on feed, and IM had greater LW than HF throughout the trial. Mean initial ULMA was 55.8 and 55.5 cm² for HF and IM, respectively, and increased linearly until the end of the experiment (78.7 and 82.8 cm², respectively). IM showed higher ULMA than HF only in the last measurement. Initial UFAT averaged 0.04 and 0.4 mm for IM and HF, respectively, and increased linearly during the feeding period (2.4 and 4.3 mm, respectively). UFAT was higher n HF than in IM during the entire experimental period. IM showed faster growth rates and protein accretion than HF in the Longissimus muscle. HF showed faster subcutaneous fat accretion.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500002&tlng=enbackfat thicknessbeefin vivo evaluationribeye area |
| spellingShingle | Saulo da Luz e Silva Evaldo Antonio Lencioni Titto Paulo Roberto Leme Luciane Silva Martello Angélica Simone Cravo Pereira Rafael Martins Titto José Carlos Machado Nogueira Filho Albino Luchiari Filho Days on feed and sex effects on live weight and carcass traits measured by ultrasound Scientia Agricola backfat thickness beef in vivo evaluation ribeye area |
| title | Days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| title_full | Days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| title_fullStr | Days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| title_full_unstemmed | Days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| title_short | Days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| title_sort | days on feed and sex effects on live weight and carcass traits measured by ultrasound |
| topic | backfat thickness beef in vivo evaluation ribeye area |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500002&tlng=en |
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