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...

This paper shows the results of several research works on the characteristics of the fleece of vicuñas reared under semi-captivity conditions in the multicommunals of Cala Cala and Picotani, located in the province of San Antonio de Putina, Puno, Peru. The results indicate the presence of three color tones: light, dark and yellowish, whose extension in the body varies according to sex and age. In the praxis only the useful (commercial) part of the coat is sheared. The total weight of fleece shows variations between females (354.71 g) and males (364.65 g) (p<0.05). The fleece yields in vicuñas were similar by sex and body region, while the yield in juveniles was 84.43% and in adults 81.87% (p<0.05). The proportion of clean fleece reaches 80%. The proportion of hair in the fleece shows variations according to sex, age, body region and rearing locality.

The morphology of 284 K’ara llamas was determined through biometric measurements and body weight based on sex and age factors. The animals were from breeder organizations in the Checacupe district of the Cusco Region, Peru. The measurements were grouped into cephalic, body and trunk heights, cane perimeter and body weight. The analysis was carried out in a 2x5 factorial arrangement (2 sexes, 5 ages) under a complete randomized design. At head level, head length is the only one that contributes to sexual dimorphism (p<0.05). Head height showed greater value, attributable to the presence of an elongated and upright neck. Body lengths show sexual dimorphism and have different growth and development. Male neck measurements were greater (p<0.05), except for the length of the neck. At the thorax level, the thoracic perimeter and depth were greater in males (p<0.05). Each morphologic...

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 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...

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...

This paper shows the results of several research works on the characteristics of the fleece of vicuñas reared under semi-captivity conditions in the multicommunals of Cala Cala and Picotani, located in the province of San Antonio de Putina, Puno, Peru. The results indicate the presence of three color tones: light, dark and yellowish, whose extension in the body varies according to sex and age. In the praxis only the useful (commercial) part of the coat is sheared. The total weight of fleece shows variations between females (354.71 g) and males (364.65 g) (p<0.05). The fleece yields in vicuñas were similar by sex and body region, while the yield in juveniles was 84.43% and in adults 81.87% (p<0.05). The proportion of clean fleece reaches 80%. The proportion of hair in the fleece shows variations according to sex, age, body region and rearing locality.

The morphology of 284 K’ara llamas was determined through biometric measurements and body weight based on sex and age factors. The animals were from breeder organizations in the Checacupe district of the Cusco Region, Peru. The measurements were grouped into cephalic, body and trunk heights, cane perimeter and body weight. The analysis was carried out in a 2x5 factorial arrangement (2 sexes, 5 ages) under a complete randomized design. At head level, head length is the only one that contributes to sexual dimorphism (p<0.05). Head height showed greater value, attributable to the presence of an elongated and upright neck. Body lengths show sexual dimorphism and have different growth and development. Male neck measurements were greater (p<0.05), except for the length of the neck. At the thorax level, the thoracic perimeter and depth were greater in males (p<0.05). Each morphologic...

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 study was conducted in herds of llamas of peasant organizations in the district of Checacupe, Cusco Region, Peru, to determine the biometric measurements and live weight of the Ch’acu llamas based on sex and age. The measurements were grouped in cephalic, heights at withers and rump, cane perimeter and live weight, under a randomized complete design analysis with 2x5 factorial arrangement (α=0.5). Cephalic measurements showed significant differences in favour of the male (p<0.05), but the length of ears was similar; the heights were similar; body length, dorsal length and distance between shoulders favoured females (p<0.05); the measurements of the neck of the male llamas are different (p<0.05), except the length of the neck and its lower perimeter; females exhibit greater thoracic perimeter (p<0.05), but the thoracic perimeter and depth were similar; the thickness of ...

The study was conducted in herds of llamas of peasant organizations in the district of Checacupe, Cusco Region, Peru, to determine the biometric measurements and live weight of the Ch’acu llamas based on sex and age. The measurements were grouped in cephalic, heights at withers and rump, cane perimeter and live weight, under a randomized complete design analysis with 2x5 factorial arrangement (α=0.5). Cephalic measurements showed significant differences in favour of the male (p<0.05), but the length of ears was similar; the heights were similar; body length, dorsal length and distance between shoulders favoured females (p<0.05); the measurements of the neck of the male llamas are different (p<0.05), except the length of the neck and its lower perimeter; females exhibit greater thoracic perimeter (p<0.05), but the thoracic perimeter and depth were similar; the thickness of ...

The study was carried out in two communities of the Tacna Region, Peru to determine textile characteristics of Huacaya alpaca fibre and its degree of association with sex, age and coat colour. Fibre samples from 817 and 683 alpacas from the Huaytire and Maure communities, respectively, were analysed with the OFDA 2000 equipment. The experimental design corresponded to a complete random block 2x5x2 with fixed effects. The alpaca fibre of the Huaytire community presented finer fibres (20.51±2.52 µm) and less dispersion (5.15±0.96 µm), with greater comfort (93.85±8.26%) and a higher curvature index (36.58±5.79 °/mm), as well as longer wick length (10.45±2.21 cm). The white fibres have greater fineness (20.79±2.62 µm), and less dispersion (5.18±0.95 µm) than the coloured ones, while the comfort factor, curvature index and wick length of the white fibres showed greater values. In ...

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...

In the Queulla sector, community of Chapimarca, province of Grau, Apurímac Region, the textile properties of the fibre of white Huacaya alpacas were determined, according to factors sex, body region and age group. The fibre analyses were carried out in the Fibre and Wool Laboratory of the National University of Huancavelica. The juvenile alpacas had a smaller fibre diameter (MDF), a higher comfort factor (FC), a higher yarn fineness (SF) and a better curvature index (IC) than the adult ones (p<0.05). Males presented better FC and yarn fineness (SF) than females (p <0.05). In general, the fibre of the rib area and the rump were of similar quality, but superior to the fibre of the shoulder (p<0.05). It is concluded that the fibre produced in the study is within the fibres of good quality.