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| Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Dias,Eduardo Antunes; Costa Junior,João Batista Gonçalves; Vieira,Maitê de Moraes; Moojen,Fernanda Gomes. |
| The objective of this study was to determine the main causes of failure in bull breeding using a soundness evaluation in Rio Grande do Sul State/Brazil. We evaluated 19,836 bulls from 15 different breeds with ages ranging from two to eight years. The failures of bulls in each step were analyzed by logistic regression. The binary logistic regression was applied because the response variable had only two responses: Success (1) and Failure (0). Older bulls are more likely to be rejected than are younger bulls, regardless of their genetic group. Depending on the step of the assessment, one or another group is rejected. All steps of bull breeding soundness evaluation (BBSE) are important, with special attention to the failures of the behavioral evaluation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: BBSE; Fertility; Mounting ability; Scrotal circumference. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700240 |
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| Fornari,Giordano Bruno; Menegassi,Sílvio Renato Oliveira; Pereira,Gabriel Ribas; Oliveira,Tamara Esteves de; Barcellos,Júlio Otávio Jardim. |
| ABSTRACT The objective of this study was to investigate the effects of genetic group and calf sex on selling prices in auctions in the state of Santa Catarina (SC), Brazil. We evaluated 33,143 animals, representing 3,587 lots in 47 auctions from 2009 to 2014. The calves were classified according to genetic groups: British breed or crossbreed (BX); Continental breed or crossbreed (CX); Zebu breed or crossbreed (ZC); British and Continental crossbreed (BC); and Bos taurus and Bos indicus crossbreed (TI). The lots were composed of male and female calves. The years presenting low and high changes in the price of calves were similar to the variation in the price of beef cattle and, in 2014, the calf price reached its highest value (R$5.36). Male calves were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal production; Beef cattle; Genetic parameters; Marketing; Price. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001000632 |
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