The aim of this study was to evaluate the effect of period of the year, year of the birth, sex and age on morphometric indices, such as body capacity, body indices, body side indice, anamorphosis indice, compactness indice and body proportionality indice. The correlation between these characteristics was calculated. Santa Ines sheep offspring from the birth to 12 months-old, at the Estado do Rio de Janeiro were used. Measurements were obtained from animals under an extensive scheme within three years of study totaling 2,601 observations. In this work, the year of birth, sex, animal age and triple interaction between these effects have influenced (P<0.05) morphometric indices. According to body and compactness indices averages also was verified that the animals tended for a more compact conformation. Males were higher than females in all measurements and weight. Correlations between all measures were high and positive. The studied animals show a longilinear conformation, tending to compact.

Los efectos de la estación, año de nacimiento, edad y sexo sobre índices morfométricos como: capacidad del cuerpo, índice corporal, índice del cuerpo, índice de anamorfosis, índice de compacidad y índice de proporcionalidad corporal fueron evaluados y fueran estimadas las correlaciones entre ellos. Se utilizaron ovejas Santa Inés desde el nacimiento hasta los 12 meses de edad, criadas en el norte del Estado de Río de Janeiro. Las evaluaciones fueron realizadas durante un período de tres años, totalizando 2.601 observaciones. El año de nacimiento, el sexo, la edad del animal y la interacción entre ellos tuvo efectos (P<0,05) sobre los índices estudiados. A partir de las medidas corporales y de los niveles de compacidad se observó que los animales tienden a presentar conformación más compacta. Las correlaciones entre las medidas fueron altas y positivas. Los animales estudiados muestran una conformación longilínea, tendiendo a compacto.

O objetivo deste trabalho foi avaliar o desempenho reprodutivo de ovelhas Santa Inês alimentadas com dieta suplementada com gordura protegida. Os intervalos do parto ao primeiro estro clínico e à concepção, a taxa de gestação, a prolificidade, o peso vivo e a condição corporal foram determinados. Depois do parto, 60 ovelhas e seus cordeiros foram pesados e distribuídos aleatoriamente em três tratamentos com base na idade, peso corporal e número de cordeiros nascidos. Os tratamentos consistiram de dieta controle ou da dieta controle mais 30 g de gordura protegida, do parto aos 25 dias pós-parto (Sup25), ou aos 60 dias pós-parto (Sup60). Das 60 ovelhas avaliadas, 93,3% retornaram ao estro, e 74,5% ficaram prenhes, com taxa de parição de 73,53% e intervalo de parto de 196,5 dias. O período médio do parto até o primeiro estro foi de 32,4, 27,2 e 35,5 dias, para as ovelhas alimentadas com a dieta controle, Sup25 e Sup60, respectivamente. Os intervalos do parto até a concepção foram de 45,2, 46,5 e 45,2 dias, e as dietas com suplementação não apresentaram diferenças em comparação ao tratamento controle. A suplementação com gordura protegida para ovelhas da raça Santa Inês, bem nutridas, não melhora seu desempenho reprodutivo.

The objective of this work was to evaluate the reproductive performance of Santa Inês ewes fed a diet supplemented with protected fat. Intervals from lambing to first clinical estrus and to conception, conception rate, prolificacy, live weight and body condition were determined. After lambing, 60 ewes and their offsprings were weighted and randomly assigned to three treatments, based on age, body weight and number of born lambs. Treatments consisted of: control diet, or control diet plus 30 g of protected fat, from lambing to day 25 of post-lambing (Sup25), or to day 60 of post-lambing (Sup60). Out of 60 evaluated ewes, 93.3% returned to estrus, and 74.5% got pregnant, with 73.53% lambing rate and 196.5 days lambing interval. The average periods from lambing to first estrus were 32.4, 27.2 and 35.5 days for ewes fed the control diet, Sup25, and Sup60, respectively. The intervals from lambing to conception were 45.2, 46.5 and 45.2 days, and the supplemented diets did not show differences in comparison to the control diet. Supplementation with protected fat to well-nourished Santa Inês ewes does not improve their reproductive performance.