Relative growth of carcass tissues of goat kids from five breed Types finished on pasture or feedlot

• Published in: Semina. Ciências agrárias : revista cultural e científica da Universidade Estadual de Londrina Vol. 37; no. 2; pp. 989 - 996
• Main Authors: Lourençon, Raquel Vasconcelos, Gonçalves, Heraldo Cesar, Meirelles, Paulo Roberto Lima, Browning Junior, Richard, Leite-Browning, Maria Lenira, Chávari, Andréia Cristina Toniolo, Marques, Raquel Ornelas, Canizares, Gil Ignacio Lara, Leal, Natalia Santos, Gomes, Helen Fernanda Barros
• Format: Journal Article
• Language: English
• Published: Universidade Estadual de Londrina 26.04.2016
• Subjects: Alometria; Alpina; Anglo Nubiana; Bôer; Sistema de terminação
• ISSN: 1676-546X; 1679-0359
• DOI: 10.5433/1679-0359.2016v37n2p989

The aim of this study was to evaluate the effect of cross breeding, finishing system, and gender on the relative growth of carcass tissues of dairy kids. Seventy eight kids (39 male and 39 female) from five breed types were used: Alpine; ½ Boer + ½ Alpine (½ BA); ½ Nubian + ½ Alpine (½ ANA); ¾ Boer + ¼ Alpine (¾ BA); and ½ Nubian + ¼ Boer + ¼ Alpine (TC). Kids were distributed into two finishing systems: in pasture with doe (FS1) and weaned in feedlot (FS2). Kids were slaughtered at a mean age of 128.4 ± 7.9 days and mean live weight of 22.07 kg. The mean weight of half carcasses was 5.09 kg. To determine allometric growth, we used the exponential equation Y= aXb. In the half carcass, muscle tissue showed comparatively early growth in group ½ BA, whereas fat tissue of animals in FS1 had relatively late growth. Females exhibited early growth of muscle tissue, while in males this tissue was intermediate. The ½ BA first-cross improved carcass characteristics by enhancing the growth of muscle tissue.