PSX-11 Effects of nutritional plane before breeding on body condition score, mass indexes, and chemical composition of hair sheep. (30th November 2020)

• Record Type: Journal Article
• Authors: Lourencon, Raquel V; Dawson, Lionel J; Puchala, Ryszard; Ribeiro, Luana P; Gipson, Terry A; Loetz, Erick; Rojas, Miguel; Calle, Mauricio; Scronce, Adaven; Goetsch, Arthur L
• Is Part Of: Journal of animal science. Volume 98(2020)Supplement 4
• Page Start: 455
• Page End: 455
• Publication Date: 2020-11-30
• Subjects: Body composition -- hair sheep -- nutritional plane; Livestock -- Periodicals; Livestock; Electronic journals; Periodicals; 636.005
• DOI: 10.1093/jas/skaa278.792
• Languages: English
• ISSNs: 0021-8812

Abstract

Abstract: Twenty-five Dorper (D), 27 Katahdin (K), and 33 St. Croix (S) ewes were used to characterize changes in BW, body condition score (BCS), body mass index (BMI), and body composition with different nutritional planes before breeding. Supplement treatments were soybean meal fed at 0.16% BW and 25% soybean meal and 75% ground corn at 0.8% BW (DM; L and H, respectively). There were two animal groups and pens per breed and supplement treatment. Shrunk BW (20 h without feed and water), BCS (1–5), linear measures including wither height and length from the point of the shoulder to pin bone, and body composition via urea space were determined after 0, 4, and 8 wk. Initial values were 62.10, 59.99, 61.57, 62.25, 50.23, and 52.98 kg shrunk BW (SEM=3.601); 35.82, 34.81, 35.57, 36.41, 33.77, and 34.09% fat (SEM=1.043); 17.06, 16.72, 16.98, 17.27, 16.38, and 16.49 MJ/kg energy (SEM=0.357); 3.29, 3.41, 3.29, 3.29, 2.99, and 3.18 BCS (SEM=0.139); and 13.72, 14.22, 12.69, 12.81, 11.53, and 11.50 g/cm 2 BMI (BW/(height×length); SEM=0.463) for D-L, D-H, K-L, K-H, S-L, and S-H, respectively. Change from wk 0 to 8 was -0.80, 2.90, -2.74, 3.33, -2.02, and 3.36 kg shrunk BW (SEM=0.842); -0.14, 2.03, -1.45, 1.70, -0.85, and 2.10 kg fat (SEM=0.862); -8.4, 83.7, -62.5, 73.8, -38.4, and 88.1 MJ energy (SEM=33.30); -0.02, 0.20, 0.04, 0.29, -0.08, and 0.17 BCS (SEM=0.070); and -0.265, 0.297, -0.185, 0.491, -0.571, and 0.587 g/cm 2 BMI (SEM=0.488) for D-L, D-H, K-L, K-H, S-L, and S-H, respectively. Correlation coefficients between change in BCS and mass of water, fat, and energy were 0.35 and 0.44 (P ≤ 0.004), and those for BMI were 0.54 and 0.56, respectively (P < 0.001). In conclusion, a BMI can be more highly related to and predictive of change in body composition of hair sheep resulting from different nutritional planes compared with BCS.