Trabajo presentado en el VI Congreso Mundial de Camélidos Sudamericanos “Ciencia y Conciencia para la Producción, Gestión e Innovación en la Ganadería Andina” - 2012, realizados del 21 al 23 de noviembre del 2012.

The study aimed to determine Pearson's and Spearman's Correlation Coefficients, significances and confidence intervals, as well as to define the best procedure to determine the linear association relationship for fibre characters in Huacaya alpacas. A total of 22 543 alpaca fleece samples from the Puno Region, Peru was used. Variables that show physical and textile characteristics were analysed in each sample. Forty-five Pearson Correlation coefficients were determined for pairs of characters and the significance was determined by approximating the Student's t-distribution; confidence intervals were determined by Fisher's Z approximation. For the same data, Spearman's Correlation coefficients were determined, significance was obtained by standardizing Spearman's rs values ​​to a Student's t value, the probability of significance was determined through the Student's t function fo...

The aim of this of the study was to determine relative economic weights for 10 traits related to fibre quality in Huacaya alpacas, through the Reciprocal of the phenotypic standard deviation of the trait and the Regression of the traits on the economic benefit. In total, 22 543 data per character were used, determined in samples of fleece from alpacas from the Puno Region. The economic weights obtained by the first procedure assume different values, which are inversely proportional to the value of the phenotypic standard deviation of the trait and quantify the number of times that the variance contains the relevant phenotypic standard deviation. Those obtained by the regression method also assume different values (positive and negative), which do not necessarily guide the trend, but quantify the change in the slope to a change in an average unit of the phenotype. The economic weight valu...

The technological characteristics and the fibre diameter profile were determined according to age (1, 3, 5, 7 years) and sex (male, female) of Huacaya alpacas from the La Raya Experimental Centre (Puno, Peru). Fleece samples were taken from the middle rib at shearing and analysed with the OFDA 2000 equipment. The data were adjusted to multiple quadratic regression for the analysis of the exchange rates. The average diameter, comfort factor, curvature index and fibre length were statistically similar between sexes, while for age, the diameter increased (from 19.48 ± 0.25 to 24.82 ± 0.80 µm), and both the comfort factor (from 98.15 to 86.95%) and the fibre length (from 102.18 ± 12.92 to 75.00 ± 11.34 mm) decreased, while the curvature index shows no defined trend. The parameters that characterize the fibre diameter profile showed a single maximum value of the mean fibre diameter, whic...

The technological characteristics and the fibre diameter profile were determined according to age (1, 3, 5, 7 years) and sex (male, female) of Huacaya alpacas from the La Raya Experimental Centre (Puno, Peru). Fleece samples were taken from the middle rib at shearing and analysed with the OFDA 2000 equipment. The data were adjusted to multiple quadratic regression for the analysis of the exchange rates. The average diameter, comfort factor, curvature index and fibre length were statistically similar between sexes, while for age, the diameter increased (from 19.48 ± 0.25 to 24.82 ± 0.80 µm), and both the comfort factor (from 98.15 to 86.95%) and the fibre length (from 102.18 ± 12.92 to 75.00 ± 11.34 mm) decreased, while the curvature index shows no defined trend. The parameters that characterize the fibre diameter profile showed a single maximum value of the mean fibre diameter, whic...

Con los datos generados en el Módulo de Bovinos Criollo de la Estación Experimental Illpa del INIA Puno, ubicado en el anillo circunlacustre de la Región Puno, y al cabo de seis campañas ganaderas (2003-2009), se ha determinado los índices reproductivos y evaluado el comportamiento de la aptitud productiva de carne y leche del hato Criollo, en función a campaña ganadera, época de nacimiento o parto (lluvias o seca), sexo de la cría (ternero o ternera), número de lactancia (primera a cuarta lactancia). Los datos fueron analizados en arreglos factoriales conducidos en un diseño completo al azar desbalanceado a través del método de Federer y Zelen. Los resultados logrados fueron: La edad al primer servicio de las vaquillas se alcanzó a 27.54 meses con 243.22 kg de peso y la edad al primer parto fue a 35.7 meses; y en las vacas los Intervalo Entre Partos variaron de 13.91 a 16 ...

Con los datos generados en el Módulo de Bovinos Criollo de la Estación Experimental Illpa del INIA Puno, ubicado en el anillo circunlacustre de la Región Puno, y al cabo de seis campañas ganaderas (2003-2009), se ha determinado los índices reproductivos y evaluado el comportamiento de la aptitud productiva de carne y leche del hato Criollo, en función a campaña ganadera, época de nacimiento o parto (lluvias o seca), sexo de la cría (ternero o ternera), número de lactancia (primera a cuarta lactancia). Los datos fueron analizados en arreglos factoriales conducidos en un diseño completo al azar desbalanceado a través del método de Federer y Zelen. Los resultados logrados fueron: La edad al primer servicio de las vaquillas se alcanzó a 27.54 meses con 243.22 kg de peso y la edad al primer parto fue a 35.7 meses; y en las vacas los Intervalo Entre Partos variaron de 13.91 a 16 ...

The study determined the effects of year and season of birth and sex or parturition on body weight and gain body and milk production of Brown Swiss cattle. It was used records from productive events of 2003-2010; the data are analyzed in factorial arrangements relevant and conducted in Randomized Complete Design. The average birth weight was 46.35 ± 7.01 kg, with differences to year and season of birth and sex factors (P = 0.05). Weight at year reached 252.37 ± 27.11 kg and gains to 180 days and one year of age were 103.68 ± 11.74 and 207.25 ± 27.61 kg, respectively; there were no differences for the factors. During the first year, recording the live weight showed linear and growing trend. Milk production has varied from 2911.96 to 3551.77 kg (P = 0.05); also they showed variations per year and season of calving and lactation number. Real milk production varied considerably (from 28...

El estudio tuvo como objetivo determinar la longitud de mecha y fibra, así como el diámetro de fibra descerdada de vicuñas por clase (crías, juveniles y adultos) y sexo (macho y hembra). Se realizó en el Criadero de Vicuñas en Semicautiverio de la Multicomunal Picotani, Puno, Perú, ubicado entre 4420 y 4800 msnm. Las variables respuesta se analizaron en un arreglo factorial de 2x3 conducido en un diseño completamente al azar. Los promedios de la longitud de mecha fueron 3.03 ± 0.52 y 2.97 ± 0.51 cm para machos y hembras (p>0.05) y de 3.08 ± 0.47, 3.33 ± 0.39 y 2.59 ± 0.39 cm en crías, juveniles y adultos, respectivamente (p<0.05). Las longitudes de fibra fueron de 4.13 ± 0.53 y 4.06 ± 0.55 cm en machos y hembras (p>0.05) y de 4.22 ± 0.28, 4.57 ± 0.27 y 3.50 ± 0.34 cm para crías, juveniles y adultas, respectivamente (p<0.05). Los diámetros de fibra descerd...

The study determined the effects of year and season of birth and sex or parturition on body weight and gain body and milk production of Brown Swiss cattle. It was used records from productive events of 2003-2010; the data are analyzed in factorial arrangements relevant and conducted in Randomized Complete Design. The average birth weight was 46.35 ± 7.01 kg, with differences to year and season of birth and sex factors (P = 0.05). Weight at year reached 252.37 ± 27.11 kg and gains to 180 days and one year of age were 103.68 ± 11.74 and 207.25 ± 27.61 kg, respectively; there were no differences for the factors. During the first year, recording the live weight showed linear and growing trend. Milk production has varied from 2911.96 to 3551.77 kg (P = 0.05); also they showed variations per year and season of calving and lactation number. Real milk production varied considerably (from 28...

El estudio determinó los efectos del año y época de nacimiento y sexo o partos sobre el peso y ganancia corporal y la producción de leche de bovinos Brown Swiss. Se utilizaron registros de eventos productivos del 2003-2010; los datos se analizaron en arreglos factoriales pertinentes y conducidas en Diseño Completo Randomizado. El promedio peso al nacer fue 46.3+-7.01 kg, habiendo diferencias para factores año y época de nacimiento y sexo (P<=0.05). El peso al año alcanzó 252.37+-27.11 kg y las ganancias a 180 días y año de edad fueron 103.68+-11.74 y 207.25+-27.61 kg, respectivamente; no existiendo diferencias para los factores. Durante el primer año el peso vivo mostró tendencia lineal y creciente. La producción de leche ha variado de 2911,96 a 3551,77 kg (P<=0.05); también mostraron variaciones por año y época de parto y número de lactancia. La producción real varió...

The study determined the effects of year and season of birth and sex or parturition on body weight and gain body and milk production of Brown Swiss cattle. It was used records from productive events of 2003-2010; the data are analyzed in factorial arrangements relevant and conducted in Randomized Complete Design. The average birth weight was 46.35 ± 7.01 kg, with differences to year and season of birth and sex factors (P = 0.05). Weight at year reached 252.37 ± 27.11 kg and gains to 180 days and one year of age were 103.68 ± 11.74 and 207.25 ± 27.61 kg, respectively; there were no differences for the factors. During the first year, recording the live weight showed linear and growing trend. Milk production has varied from 2911.96 to 3551.77 kg (P = 0.05); also they showed variations per year and season of calving and lactation number. Real milk production varied considerably (from 28...

The aim of this study was to determine staple and fibre length, as well as the fibre diameter of vicuñas by age (cria, juvenile and adults) and sex (male and female). The study was carried out in the semicaptivity vicuña farm of Multicomunal Picotani, Puno, Peru, located between 4420 and 4800 m above the sea level. Response variables were analyzed in a factorial arrangement of 2x3 conducted in a completely radomized design. The mean staple length was 3.03 ± 0.52 and 2.97 ± 0.51 cm for males and females (p>0.05) and 3.08 ± 0.47, 3.33 ± 0.39 and 2.59 ± 0.39 cm for crias, juveniles and adults respectively (p<0.05). The fibre length was 4.13 ± 0.53 and 4.06 ± 0.55 cm in males and females (p>0.05) and 4.22 ± 0.28, 4.57 ± 0.27 and 3.50 ± 0.34 cm for crias, juveniles and adults respectively (p<0.05). The fibre diameter was 12.755 ± 0.580 and 12.719 ± 0.398 ìm for male...

The study determined the effects of year and season of birth and sex or parturition on body weight and gain body and milk production of Brown Swiss cattle. It was used records from productive events of 2003-2010; the data are analyzed in factorial arrangements relevant and conducted in Randomized Complete Design. The average birth weight was 46.35 ± 7.01 kg, with differences to year and season of birth and sex factors (P = 0.05). Weight at year reached 252.37 ± 27.11 kg and gains to 180 days and one year of age were 103.68 ± 11.74 and 207.25 ± 27.61 kg, respectively; there were no differences for the factors. During the first year, recording the live weight showed linear and growing trend. Milk production has varied from 2911.96 to 3551.77 kg (P = 0.05); also they showed variations per year and season of calving and lactation number. Real milk production varied considerably (from 28...

The fibres of white (n = 143) and coloured (n = 100) Huacaya alpacas participating in the LVIII Livestock Fair of Southern Peru (FEGASUR) were characterized. The fibres were processed in the Fibre Laboratory of the Puno Regional Government. The frequencies were described under a fixed effects model (p <0.05). The frequency distributions of the fibre attributes differ from the normal curve to a different degree and depending on the variable, except for the Comfort Factor (CF), they show a tail bias to the right; being moderate the asymmetry of the Mean Diameter (MD) and slight asymmetry of the Index of Curvature (IC). Meanwhile, the dispersion variables, CF and Fibre length (LM) presented very asymmetric curves. White fibres show greater fineness than coloured fibres (p<0.05), without differences for the sex factor. The standard deviation of the mean diameter [SD (DM)] and the Coeff...