Biometric measurements of Santa Inês meat sheep reared on Brachiaria brizantha pastures in Northeast Brazil
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Universidade Federal de Minas Gerais
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Artigo de periódico
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This study was undertaken to examine biometric measurements during the growth phase of
male and female Santa Inês sheep reared in Brachiaria brizantha pastures in northeastern
Brazil. The experiment involved 24 castrated males and 24 females at an initial age of 90
days, with an average body weight of 19.04 ± 0.96 kg. Treatments consisted of the effect of
four cultivars (Marandu, Xarae´s, Piatã and Paiagua´s) and two sexes. Six animals were
used per treatment, in a randomized-block experimental design. The following characteris tics were evaluated: abdominal circumference (AC), body condition score (BCS), body
length (BL), body weight (BW), body capacity 1 (BC1), body capacity 2 (BC2), chest width
(CW), heart girth (HG), leg circumference (LC), leg length (LL), rump height (RH), rump
width (RW) and withers height (WH). Data were subjected to descriptive analysis, Pearson’s
correlation, ANOVA and Tukey’s, Kruskal Wallis and Mann-Whitney tests. Univariate and
multiple regressions were applied to estimate BW with a maximum error level of 5%. Signifi cant differences were observed for the biometric measurements between sexes and culti vars (p<0.05). Body weight was highly correlated (>70%) with AC, WH, CG, RW, BC1 and
BC2. The male sheep grazed on cultivars Piatã showed the best values for BW (40.43 kg),
HG, RW, WH, LL, LC (102.46; 20.8; 65.23; 60.44; 42.54 cm respectively) and BC1 (4.25 kg/
cm). Females grazed on cultivar Marandu had higher values for RW, CW, LL (17.26; 20.1;
75.98 cm respectively), BC1 (6.03 kg/cm) and BC2 (0.422 kg/cm). The equations that best
estimated live weight were BC1 and HG. In male and female Santa Inês sheep, biometric
parameters grow differently depending on the cultivar where they are grazed during the
growth phase. Cultivars Marandu and Piatã are the most recommended for sheep production, as they provided the best performance and body development in those animals.
Abstract
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Zootecnia, Brasil
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Zootecnia, Brasil
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https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0219343