Morphological study of Socorro Island Merino sheep and its crosses with hair breeds.

A study was conducted with the objective to characterize the morphology of Socorro Island Merino sheep. A total of 67 sheep, 62 females, 26 purebred and 36 crossbred with hair breeds, and five males were scored for 10 body measurements in addition to live weight, and four racial and seven functional indices were calculated. The influence of sex and crossbreeding on the body measurements and indices was analyzed by one-way analysis of variance, and morphological harmony was determined using Spearman correlation. With exception of rump length, body measurements and live weight were significantly greater in males than in females. Sexual dimorphism was 1.21, with males being 78 % heavier than females. Socorro Island Merino sheep were dolichocephalous, elipometric, with a convex curve rump, and with a high and low morphological harmony for females and males, respectively. They had undefined zootechnical aptitude tended toward dairy phenotype as long as crossbreeding with hair breeds did not affect their functional or productive aptitude. It can be concluded that Socorro Island Merino sheep is a new biotype of the Merino breed, which is necessary to preserve and evaluate as a source of genetic characteristics such as adaptation to harsh environmental conditions.

Effect of supplemental yeast culture and physiological factors on colostrum and milk composition of Pelibuey ewes.

The effects of supplemental yeast culture, litter size, stage and number of lactation on milk composition were studied in Pelibuey ewes. Twenty ewes were randomly assigned to one of two dietary treatments. Ten control ewes grazed on guinea grass (Panicum maximum) and were supplemented with concentrate. A further ten ewes received the same diet with 14 g/head/day of yeast culture (Saccharomyces cerevisiae). Colostrum was collected within 24 h after parturition, and subsequently, milk samples were collected at fortnightly intervals (7, 21, 35, and 49 days). Total solids content averaged 32% in colostrum and 12.5% in milk. Colostrum of primiparous ewes had higher total solids content than that of ewes with more than five lactations. However, ewes with more than five lactations produced milk with higher net energy, total solids, protein, and casein than ewes with fewer lactations. Milk at 7 days had a significantly higher content of energy, total solids, and fat than milk at 21, 35, and 49 days. Total solids content was lower for ewes rearing one lamb than larger litter sizes. Supplementation with yeast culture did not affect the composition of colostrum and milk, which was mainly affected by the stage and number of lactation.

Propuesta de funcionamiento de una unidad estrategica de negocios en el marco de una Universidad Publica y Autonoma / sss

Los desafios de la globalizacion estan haciendo impacto en la universidades publicas. Si bien los efectos son variados, en este trabajo se enfatiza la dificultad que significa para ellas, el mantener la inversiones en tecnologias de informacion (altamente costosa y con caotica obsolencia). En este sentido se hace una propuesta de desarrollo de una unidad estrategica de negocios, que ofreciendo servicios de externalizacion en TIC's a otras universidades o empresas relacionadas, pueda ayudar a su propia autosostenibilida como unidad y Universidad...