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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Caracter?sticas de carca?a e da carne de cabritos machos inteiros, castrados e f?meas / Carcass characteristics and meat of males, castrated and females kid goats

COUTO, Douglas Mena do 26 February 2013 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-26T19:19:56Z No. of bitstreams: 1 2013 - Douglas Mena do Couto.pdf: 606195 bytes, checksum: fa7a8535b5076ea8a9110160998332f1 (MD5) / Made available in DSpace on 2018-09-26T19:19:56Z (GMT). No. of bitstreams: 1 2013 - Douglas Mena do Couto.pdf: 606195 bytes, checksum: fa7a8535b5076ea8a9110160998332f1 (MD5) Previous issue date: 2013-02-26 / CAPES / The research was conducted at the Instituto de Zootecnia, Universidade Federal Rural do Rio de Janeiro, located in the municipality of Serop?dica, state of Rio de Janeiro. We used 26 animals with 9 males entires, 9 castrated and 8 females aged 5 months and every breed. The animals received the same diet ad libitum, with 11% crude protein, 3.2 Mcal of metabolizable energy and 0.8 kg of dry matter meeting the nutrient requirements recommended by NRC (1981) for average daily gain of 0, 1 Kg morphometric measurements were carried out fortnightly in the morning before feeding, with the aid of tape being checked: withers height (WH), hip height (HH), heart girth (HG), perimeter barrel (PB), body length (BL), rump length (RL), chest width (CW) and rump width (RW). The evaluations of the body condition of the animals were done in prior to the slaughter. The procedures were performed by three examiners, who established score ranging from 1 to 5, according to visual observation and tactile regions rib, back and sternum, based on the degree of fat deposition and muscle development. As the largest increase in these tissues the body condition score. The goats were fasted solids for 14 hours before slaughter, and weighed (final weight - FH) immediately before. The morphometric measurements of carcass were: internal carcass length (CL), leg length (LL) and cushion thickness (CT) were obtained with the aid of tape and compass, in the case of the last measurement. There was not difference between groups, but the largest absolute values were found for bulls, steers and females respectively. This fact can be explained by the action of testosterone in whole animals, but as they were still in the onset of puberty may not have been enough for the secondary sex characteristics to excel. Goats breed is an alternative to meat production in intensive farming systems. The choice between the sexes to be created will depend on the infrastructure of the breeding, management and marketing to be stocked. / Objetivou-se com este trabalho avaliar as medidas morfofuncionais, caracter?sticas de carca?a e a composi??o centesimal da carne de cabritos machos inteiros, machos castrados e f?meas. A pesquisa foi conduzida no Instituto de Zootecnia da Universidade Federal Rural do Rio de Janeiro, localizado no munic?pio de Serop?dica, estado do Rio de Janeiro. Foram utilizados 26 animais sendo 9 machos inteiros, 9 machos castrados e 8 f?meas com idade de 5 meses e todos sem ra?a definida. Os animais receberam a mesma dieta, ? vontade, com 11% de prote?na bruta, 3,2 Mcal de energia metaboliz?vel e 0,8Kg de mat?ria seca atendendo as exig?ncias nutricionais recomendadas pelo NRC (1987) para o ganho de peso di?rio de 0,1 Kg. As pesagens foram realizadas quinzenalmente e as medi??es morfofuncionais tomadas no dia anterior ao abate, pela manh?, antes do arra?oamento, com o aux?lio de fita m?trica, sendo verificadas: altura de cernelha (AC), altura de garupa (AG), per?metro tor?cico (PT), per?metro de barril (PB), comprimento corporal (CC), comprimento de garupa (CG), largura de peito (LP) e largura de garupa (LG). As avalia??es da condi??o corporal dos animais foram feitas no dia anterior ao do abate. Os procedimentos foram executados por tr?s avaliadores, os quais estabeleceram pontua??o variando de 1 a 5, de acordo com observa??o visual e t?til das regi?es de lombo e esterno, com base no grau de deposi??o de gordura e desenvolvimento muscular. Conforme o aumento destes tecidos, maior o escore da condi??o corporal. Os cabritos foram submetidos a jejum de s?lidos por 14 horas antes do abate, e pesados (peso ao abate ? PA) imediatamente antes. As medidas morfofuncionais da carca?a foram: comprimento interno da carca?a (CIC), comprimento de perna (CP) e espessura de cox?o (EC) que foram obtidas com o aux?lio de fita m?trica e compasso, no caso da ?ltima mensura??o. N?o houve diferen?a entre os grupos estudados, por?m os maiores valores absolutos foram encontrados para os machos inteiros, castrados e f?meas respectivamente. Este fato pode ser explicado pela a??o da testosterona nos animais inteiros, mas como estavam ainda no in?cio da puberdade pode n?o ter sido suficiente para que as caracter?sticas sexuais secund?rias se destacassem. Cabritos de diferentes condi??es sexuais s?o alternativa para a produ??o de carne em sistemas de cria??o intensivos. A escolha entre os sexos a serem criados depender? da infraestrutura do criat?rio, manejo e mercado a ser abastecido.

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