El estudio tuvo como objetivo determinar la cinética y morfometría espermática de semen congelado sexado y convencional de toros Brown Swiss utilizando el sistema Integrated Sperm Analisys. Se utilizaron 10 pajillas de semen sexado y 10 pajillas de semen convencional de origen americano. Los valores de la cinética (velocidad curvilínea [VCL], velocidad media [VAP], velocidad rectilínea [VSL], amplitud del desplazamiento lateral de cabeza [ALH], frecuencia de batido [BCF], índice de linealidad [LIN[, índice de rectitud [STR], índice de oscilación [WOB]) y morfometría espermática (área, largo, ancho y perímetro de la cabeza de los espermatozoides) fueron similares entre el semen sexado y convencional de toros Brown Swiss.

            The aim of this study was to determine the physicochemical characteristics of milk in alpacas and llamas, considering two agroecological zones in the case of the alpaca. 40 Huacaya alpacas and 20 female llamas that were between 40 and 45 days of lactation were used. The animal husbandry system was extensive. The composition of total solids (%), gross energy (MJ/100 g), ash (%), fat (%), non-fatty solids (%), density (g/cm3), protein (%), lactose were determined. (%), salts (%), pH, freezing point (ºC) and somatic cell count (cells/ml x 1000). It is concluded that the physicochemical composition of milk is similar between llamas and alpacas and that the agroecological zone influences the composition of milk in Huacaya alpacas.

The aim of this study was to determine the kinetics and sperm morphometry in sexed and conventional frozen semen of Brown Swiss bulls using the Integrated Sperm Analisys system. Ten straws of sexed semen and 10 straws of conventional semen imported from USA were used. The values of kinetics (curvilinear velocity [VCL], average velocity [VAP], rectilinear velocity [VSL], amplitude of lateral head displacement [ALH], beat frequency [BCF], linearity index [LIN [, index of straightness [STR], oscillation index [WOB]) and sperm morphometry (area, length, width and perimeter of the head of the sperm) were similar between sexed and conventional semen of Brown Swiss bulls frozen in straws.

            The aim of this study was to determine the physicochemical characteristics of milk in alpacas and llamas, considering two agroecological zones in the case of the alpaca. 40 Huacaya alpacas and 20 female llamas that were between 40 and 45 days of lactation were used. The animal husbandry system was extensive. The composition of total solids (%), gross energy (MJ/100 g), ash (%), fat (%), non-fatty solids (%), density (g/cm3), protein (%), lactose were determined. (%), salts (%), pH, freezing point (ºC) and somatic cell count (cells/ml x 1000). It is concluded that the physicochemical composition of milk is similar between llamas and alpacas and that the agroecological zone influences the composition of milk in Huacaya alpacas.

The objective of this study was to determine the productive and textile characteristics of the fibre in Huacaya alpacas considering age (2, 4 and 6 years), sex and origin. Fibre samples were collected from the flanks of 120 alpacas from two communities of the Ayaviri district, Puno. The diameter, comfort factor and curvature index and fineness of yarn was determined using the computer analysis Optical Fiber Diameter 2000 and fibre length using the ASTM method. The diameter of the fibre and the fineness of yarn increased significantly with age (p<0.05), while the comfort index and wick length decreased significantly with the age of the animal (p<0.05). The curvature index was not affected by age, sex or origin of the animal. The sex and the community of origin did not affect the fibre diameter, the comfort index, the length of the wick or the fineness of the yarn. A negative and mod...

The objective of this study was to determine the productive and textile characteristics of the fibre in Huacaya alpacas considering age (2, 4 and 6 years), sex and origin. Fibre samples were collected from the flanks of 120 alpacas from two communities of the Ayaviri district, Puno. The diameter, comfort factor and curvature index and fineness of yarn was determined using the computer analysis Optical Fiber Diameter 2000 and fibre length using the ASTM method. The diameter of the fibre and the fineness of yarn increased significantly with age (p<0.05), while the comfort index and wick length decreased significantly with the age of the animal (p<0.05). The curvature index was not affected by age, sex or origin of the animal. The sex and the community of origin did not affect the fibre diameter, the comfort index, the length of the wick or the fineness of the yarn. A negative and mod...