Título:	Weight and age at puberty and their correlations with morphometric measurements in crossbred breed suffolk ewe lambs.
Autor:	FERRA, J. de C. CIESLAK, S. SARTORI FILHO, R. MCMANUS, C. MARTINS, C. F. SERENO, J. R. B.
Afiliación:	JANINE DE CAMPOS FERRA, UFMS; SILVIA CIESLAK, UFMS; ROBERTO SARTORI FILHO; CONNIE MCMANUS, UnB; CARLOS FREDERICO MARTINS, CPAC; JOSE ROBSON BEZERRA SERENO, CPAC.
Año:	2010
Referencia:	Revista Brasileira de Zootecnia, v. 39, n. 1, p. 134-141, 2010.
Descripción:	The objective of this study was to identify and to correlate parameters that characterize puberty and estimate the age and weight of Suffolk ewe lambs in Mato Grosso do Sul. This study was carried out with twenty-two Suffolk ewe lambs for 256 days. Blood samples were collected from the jugular vein and centrifugated and the plasma were stored at -20°C until analysis of progesterone (P4) concentration by radioimmunoassay (RIA). The morphometric measurements included: head length and width, body length, elbow height, chest perimeter, back-sternal diameter, croup length, width and height, cannon bone perimeter and shoulder and hip width, using a tape. The animals became pubertal when the plasma progesterone concentration was >1.0 ng/mL, at 34.1 ± 5.2 kg and 39.5 ± 8.5 weeks of age. Meanwhile, the lambs that did not reach puberty (37.7 ± 11.4 weeks of age) were lighter. The morphometric measurements has medium to low correlations with age and weight at puberty.
Thesagro:	Ovino Cordeiro Progesterona
NAL Thesaurus:	progesterone puberty sheep
Palabras clave:	Perímetro torácico Radioimunoensaio Chest perimeter Radioimmunoassay
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPAC)