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Previous issue date: 2013-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivou-se, com o presente estudo, estabelecer rela??es entre comportamento alimentar, temperamento e consumo alimentar residual em bovinos Nelore, na fase p?s-desmame, submetidos ao confinamento. Foram utilizados 85 machos Nelore desmamados, em confinamento coletivo, durante 119 dias, sendo os 28 primeiros para adapta??o ? dieta e ao ambiente. O CAR foi calculado pela diferen?a entre o consumo observado e o predito, baseado no ganho de peso m?dio di?rio e no peso vivo metab?lico, sendo classificados como alto CAR (>m?dia + 0,5 DP), m?dio CAR (? 0,5 DP da m?dia) e baixo CAR (<m?dia ? 0,5 DP). A compara??o de m?dias foi realizada pelo teste t-Student. Foram estimadas correla??es de Pearson entre caracter?sticas de comportamento alimentar, temperamento, CAR e classes de GMD. As caracter?sticas de comportamento alimentar tempo de perman?ncia no cocho (TPC), tempo de cabe?a baixa (CB) e frequ?ncia de visitas (FV) foram mensuradas a partir de um sistema de monitoramento eletr?nico, que registra padr?es individuais de alimenta??o, GrowSafe System?. O temperamento foi avaliado atrav?s da velocidade de sa?da (VS), escore composto (EC) e reatividade. N?o houve rela??o do CAR com peso inicial (PI), peso final (PF) e GMD. Em m?dia, animais classificados como baixo CAR apresentaram CMS 24,8% inferior aos animais alto CAR. Animais alto CAR permaneceram mais tempo no cocho, passaram mais tempo de cabe?a baixa e apresentaram maior taxa de alimenta??o (TA) comparados aos animais baixo CAR. No entanto, nenhuma diferen?a foi encontrada para FV. O PF, PI, CMS influenciaram o GMD dos animais. Foram estimadas correla??es significativas entre TPC, CB, TA e CAR (P<0,05), no entanto, n?o foi observada correla??o entre FV e CAR. O TPC e a FV n?o variou para animais de diferentes classes de GMD. Animais classificados como alto GMD apresentaram maior CB e TA, frente aos animais baixo GMD. Correla??es significativas foram encontradas para CB, TA e GMD, mas n?o para TPC, FV e GMD. A ?nica caracter?stica de temperamento que apresentou varia??o quanto ?s classes de CAR foi VS., e, com rela??o ?s classes de GMD, nenhuma caracter?stica temperamento apresentou diferen?a significativa. Foi estimada correla??o significativa entre VS e CAR. As demais medidas de temperamento n?o se relacionaram com CAR ou GMD. CAR ? independente GMD e pesos inicial e final. Caracter?sticas de comportamento alimentar relacionam-se com CAR. O GMD est? relacionado com a agilidade em ingerir alimento. As rela??es entre temperamento e CAR e classes de GMD necessitam de mais estudos. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT
The objective of the present study was to establish relationships between feeding behavior, temperament and residual feed intake in Nellore the post-weaning under feedlot. It were used 85 male Nellore weaned feedlot during 119 days, being the first 28 days for adaptation of diet and environment. The RFI was calculated by the difference between the observed and predicted consumption, based on average daily weight gain and metabolic live weight being classified as high RFI (average > 0,5 + SD), medium RFI (? 0,5 SD of the mean) and low RFI (average < 0,5 SD). The comparison of means was performed by test t-Student. Were estimated Pearson correlations between feeding behavior traits, temperament, RFI and classes of GMD. The characteristics of feeding behavior time at feeder (TF), time to head down (HD) and frequency of visits (FV) were measured from an electronic monitoring system that records individual patterns of feeding, the GrowSafe System?. Temperament was assessed by ouput speed (OS), composite score (CS) and reactivity. There was no relationship among the RFI with initial weight (IW), final weight (FW) and ADG. On average, animals classified as low RFI showed CMS 24.8% less than the high RFI animals. High RFI animals spent more time in the trough, spent more time of head down and had higher feed rate (FR) compared to low RFI animals. However, no difference was found for FV. The IW, FW, DMI influenced the ADG of the animals. Significant correlations were estimated between TF, HD, FR and RFI (P <0.05), however, there was no correlation between FV and RFI. The TF and FV did not vary for different classes of GMD. Animals classified as high ADG showed higher HD and FR, compared to animals low GMD. Significant correlations were found for HD, FR and ADG, but not for TF, FV and ADG. The only feature of temperament showed variation in the classes of RFI was FS. And with respect to classes of ADG, no characteristic temperament showed a significant difference. It was estimated correlation between FS and RFI. The other measures of temperament were unrelated RFI or GMD. RFI is independent of ADG and initial and final weight. Characteristics of feeding behavior relate to RFI. The ADG is related with the agility to ingest food. Relations between temperament and RFI classes of ADG require further studies.
| Identifer | oai:union.ndltd.org:IBICT/oai:acervo.ufvjm.edu.br/jspui:1/322 |
| Date | January 2013 |
| Creators | Lage, Bruno Fagundes Cunha |
| Contributors | Leonel, Fernando de Paula, Mourth?, M?rio Henrique Fran?a, Cyrillo, Joslaine Noely dos Santos Gon?alves, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Villela, Severino Delmar Junqueira |
| Publisher | UFVJM |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFVJM, instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri, instacron:UFVJM |
| Rights | A concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data., info:eu-repo/semantics/openAccess |
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