Fiber characteristics of the Huacaya Alpaca

Lupton, C. J.; McColl, A.; Stobart, Robert H.

doi:10.1016/j.smallrumres.2005.04.023

Cited by 76 publications

(115 citation statements)

References 5 publications

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“…The alpaca (Lama pacos) is commercially the most important fibre producer of the South American camelid family (Lupton et al, 2006). Alpacas were introduced into Australia during the 1860s but the industry failed to establish and by the 1880s, the farmed alpaca population was all but extinct (McGregor, 2002).…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on the potential of visible and near infrared reflectance spectroscopy to measure alpaca fibre characteristics

Gishen

Cozzolino

2007

Animal

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Visible (Vis) and near infrared (NIR) reflectance spectroscopy is a rapid and non-destructive technique that has found many applications in assessing the quality of agricultural commodities, including wool. In this study, Vis and NIR spectroscopy combined with multivariate data analysis was investigated regarding its feasibility in predicting a range of fibre characteristics in raw alpaca wool samples. Mid-side samples (n 5 149) were taken from alpacas from a range of colours and ages at shearing time over 4 years (2000 to 2004) and subsequently analysed for fibre characteristics such as mean fibre diameter (MFD) and standard deviation (and coefficient of variation), spin fineness, curvature degree (and standard deviation), comfort factor, medullation percentage (by weight and number in white samples only) using traditional reference laboratory testing methods. Samples were scanned in a large cuvette using a FOSS NIRSystems 6500 monochromator instrument in reflectance mode in the Vis and NIR regions (400 to 2500 nm). Partial least squares (PLS) regression was used to develop a number of calibration models between the spectral and reference data. Mathematical pre-treatment of the spectra (second derivative) as well as various combinations of wavelength range were used in model development. The best calibration model was found when using the NIR region (1100 to 2500 nm) for the prediction of MFD, which had a coefficient of determination in crossvalidation (R 2 ) of 0.88 with a root mean square standard error of cross validation (RMSECV) of 2.62 mm. The results show the NIR technique to have promise as a semi-quantitative method for screening purposes. The lack of grease in alpaca wool samples suggests that the technique might find ready application as a rapid measurement technique for preliminary classing of shorn fleeces or, if used directly on the animal, the technology might offer an objective tool to assist in the selection of animals in breeding programmes or shows.

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Section: Introductionmentioning

confidence: 99%

Feasibility study on the potential of visible and near infrared reflectance spectroscopy to measure alpaca fibre characteristics

Gishen

Cozzolino

2007

Animal

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“…In this respect, type traits are, in general, poorly correlated with fibre traits except for CR in the HU breed, which had favourable correlations, from moderate to high, with fibre traits. This is of special importance due to the predominance of the HU breed in the South American camelid fibre production (Lupton et al, 2006). Scoring of CR could be routinely obtained in the HU population in Peru.…”

Section: Type Traitsmentioning

confidence: 99%

Genetic parameters and relationships between fibre and type traits in two breeds of Peruvian alpacas

Cervantes

Pérez-Cabal

Morante³

et al. 2010

Small Ruminant Research

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a b s t r a c tFour fibre traits (fibre diameter, FD; coefficient of variation of FD, comfort factor; and standard deviation of FD) were jointly analysed with six subjectively scored type traits (fleece density, crimp, lock structure, head, coverage, and balance) in two breeds of Peruvian Altiplano alpaca (Suri, SU; and Huacayo, HU) to ascertain their genetic relationship. A total of 2405 fibre records and 2194 type scores were available for the HU breed whereas these figures were 709 for fibre records and 650 for type scores for the SU breed. Estimated heritabilities for fibre traits were moderate to high, ranging from 0.565 to 0.699 in the SU breed and from 0.255 to 0.417 in the HU breed. Genetic and permanent environmental correlations between fibre related traits were extremely similar across breeds suggesting that these traits are fairly the same. Heritabilities estimated for the type traits tended to be lower than those estimated for the fibre traits particularly in the SU breed (ranging from 0.173 to 0.272). Fibre and type traits were, in general, genetically poorly correlated except for crimp in the HU breed, which had favourable correlations, from moderate to high, for fibre traits. In Altiplano areas in which fibre performance recording could not be implemented, crimp scoring makes it feasible to carry out mass selection in the Huacayo breed and furthermore include rural communities in national or regional selection programmes.

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“…Some authors indicate significant differences between white and brown alpacas (Martinic 1993;Bas & Bonacic 1995), while others such as Valjalo (1964) do not report significant variation in fibre density based on colour. With respect to age, various authors agree that young animals present thinner fibre diameter (Martinic 1993;Bas & Bonacic 1995;Lupton et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Populations can also be found in the USA, Australia, New Zealand, and other countries where they have been introduced for commercial fleece production (Lupton et al 2006;Quispe et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Correlation between mean fibre diameter and total follicle density in alpacas of differing age and colour in the Parinacota province of the Chilean high plain

Crossley

Borroni

Raggi

2013

Journal of Applied Animal Research

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This investigation aimed to determine and correlate mean fibre diameter (MFD) and total follicle density (TFD) in juvenile (1Á2 years) and adult (3Á6 years) white and brown alpacas in the Parinacota Region of northern Chile. Fibre samples and skin biopsies were taken from the mid-side regions of 77 individuals. ( (0.42, p B0.05) between lower mean fiber diameter and higher TFD was observed for all individuals. These results contribute to regional efforts to advance genetic selection based on TFD and improve fleece productivity and economic viability of the local industry.

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Fiber characteristics of the Huacaya Alpaca

Cited by 76 publications

References 5 publications

Feasibility study on the potential of visible and near infrared reflectance spectroscopy to measure alpaca fibre characteristics

Feasibility study on the potential of visible and near infrared reflectance spectroscopy to measure alpaca fibre characteristics

Genetic parameters and relationships between fibre and type traits in two breeds of Peruvian alpacas

Correlation between mean fibre diameter and total follicle density in alpacas of differing age and colour in the Parinacota province of the Chilean high plain

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