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Journal articles on the topic 'Alpaca fleece'

Author: Grafiati
Published: 2 July 2021
Last updated: 11 February 2022

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1

McGregor, B. A., and K. L. Butler. "Sources of variation in fibre diameter attributes of Australian alpacas and implications for fleece evaluation and animal selection." Australian Journal of Agricultural Research 55, no. 4 (2004): 433. http://dx.doi.org/10.1071/ar03073.

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Sources of variation in fibre diameter attributes of Australian alpacas and implications for fleece evaluation and animal selection were investigated using data collected in the years 1994–97, from 6 properties in southern Australia. Data were analysed using REML (multiple regression analysis) to determine the effect on mean fibre diameter (MFD) and coefficient of variation of MFD (CV(FD)) of age, origin (property), sex (entire male, female), breed (Huacaya, Suri), liveweight, fibre colour, individual, and interactions of these effects. The mean (n = 100) age (range) was 4.2 years (0.1–11.9), liveweight 72.0 kg (12.0–134 kg), MFD 29.1 μm (17.7–46.6 μm), CV(FD) 24.33% (15.0–36.7%). A number of variables affected MFD and CV(FD). MFD increased to 7.5 years of age, and correlations between MFD at 1.5 and 2 years of age with the MFD at older ages were much higher than correlations at younger ages. Fibre diameter 'blowout' (increase with age) was positively correlated with the actual MFD at ages 2 years and older. There were important effects of farm, and these effects differed with year and shearing age. Suris were coarser than Huacayas with the effect reducing with increased liveweight; there was no effect of sex. Fleeces of light shade were 1 μm finer than dark fleeces. CV(FD) declined rapidly between birth and 2 years of age, reaching a minimum at about 4 years of age and then increasing; however, CV(FD) measurements on young animals were very poor predictors of CV(FD) at older ages, and the response of CV(FD) to age differed with farm and year. Suris had a higher CV(FD) than Huacayas on most properties, and MFD, liveweight, and sex did not affect CV(FD). Fleeces of dark shade had higher CV(FD) than fleeces of light shade in 2 of the years. It is concluded that there are large opportunities to improve the MFD and CV(FD) of alpaca fibre through selection and breeding. The potential benefit is greatest from reducing the MFD and CV(FD) of fibre from older alpacas, through reducing the between-animal variation in MFD and CV(FD). Sampling alpacas at ages <2 years is likely to substantially decrease selection efficiency for lifetime fibre diameter attributes.
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2

Renieri, Carlo, Alessandro Valbonesi, Vincenzo La Manna, Marco Antonini, and Moises Asparrin. "Inheritance of Suri and Huacaya type of fleece in Alpaca." Italian Journal of Animal Science 8, no. 1 (January 2009): 83–91. http://dx.doi.org/10.4081/ijas.2009.83.

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3

La Manna, Vincenzo, Antonietta La Terza, Silvia Ghezzi, Siva Saravanaperumal, Norberto Apaza, Teodosio Huanca, Riccardo Bozzi, and Carlo Renieri. "Analysis of genetic distance between Peruvian Alpaca (Vicugna Pacos) showing two distinct fleece phenotypes, Suri and Huacaya, by means of microsatellite markers." Italian Journal of Animal Science 10, no. 4 (January 2011): e60. http://dx.doi.org/10.4081/ijas.2011.e60.

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4

Powell, Aaron J., Michael J. Moss, Laurel Tegland Tree, Beverly L. Roeder, Carla L. Carleton, Emily Campbell, and David L. Kooyman. "Characterization of the effect of Melanocortin 1 Receptor, a member of the hair color genetic locus, in alpaca (Lama pacos) fleece color differentiation." Small Ruminant Research 79, no. 2-3 (October 2008): 183–87. http://dx.doi.org/10.1016/j.smallrumres.2008.07.025.

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5

Ferguson, M. B., B. A. McGregor, and R. Behrendt. "Relationships between skin follicle characteristics and fibre properties of Suri and Huacaya alpacas and Peppin Merino sheep." Animal Production Science 52, no. 7 (2012): 442. http://dx.doi.org/10.1071/an11233.

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We aimed to quantify the number, type and arrangement of skin follicles in Huacaya and Suri alpaca skin and correlate their follicle characteristics with fibre traits of harvested fibre and compared these relationships with those of Merino sheep. Fibre and skin samples were collected from the mid-side of 12 Huacaya alpacas, 24 Suri alpacas and 10 Merino sheep. The mean fibre diameter (MFD ± s.e.) of the Huacaya and Suri were: 35.5 ± 0.9 and 28.3 ± 1.0 μm, respectively. The follicle groups found for alpacas were very different from the normal trio of primary follicles found in sheep and goats. The follicle group of the alpacas consisted of a single primary follicle surrounded by a variable number of secondary follicles. The mean ± s.e. primary follicle density was 3.1 ± 0.3 and 2.7 ± 0.1 follicles/mm2 for Huacaya and Suri, respectively. The mean ± s.e. secondary follicle density (SFD) was 13.7 ± 1.2 and 17.5 ± 0.6 follicles/mm2 for Huacaya and Suri, respectively. The mean ± s.e. ratio of secondary to primary follicles (S/P ratio) was 5.1 ± 0.5 for the Huacaya and 7.3 ± 0.2 for the Suri alpacas. The sheep had higher S/P ratios and SFD, lower MFD and produced significantly heavier fleeces. The key correlations found between traits in alpacas include a negative correlation between SFD and MFD (r = –0.71, P = 0.001) and a negative correlation between S/P ratio and MFD (r = –0.44, P = 0.003) and a positive correlation between S/P ratio and total follicle density (r = 0.38, P = 0.010). The study revealed that important relationships exist between alpaca skin follicle characteristics and fibre characteristics. It was the number of secondary follicles in a group that imparts density and a corresponding reduced MFD.
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6

Valbonesi, A., S. Cristofanelli, F. Pierdominici, M. Gonzales, and M. Antonini. "Comparison of Fiber and Cuticular Attributes of Alpaca and Llama Fleeces." Textile Research Journal 80, no. 4 (February 16, 2010): 344–53. http://dx.doi.org/10.1177/0040517509337634.

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7

Soroko, Maria, Anna Wyrostek, Kevin Howell, and Krzysztof Dudek. "Comparison between the thermal insulation properties of Huacayo alpaca and Merino sheep fleeces." Veterinarski arhiv 89, no. 4 (September 1, 2019): 519–28. http://dx.doi.org/10.24099/vet.arhiv.0350.

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8

Aylan-Parker, J., and B. A. McGregor. "Optimising sampling techniques and estimating sampling variance of fleece quality attributes in alpacas." Small Ruminant Research 44, no. 1 (April 2002): 53–64. http://dx.doi.org/10.1016/s0921-4488(02)00038-x.

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9

McGregor, B. A., H. E. Ramos, and E. C. Quispe Peña. "Variation of fibre characteristics among sampling sites for Huacaya alpaca fleeces from the High Andes." Small Ruminant Research 102, no. 2-3 (February 2012): 191–96. http://dx.doi.org/10.1016/j.smallrumres.2011.07.016.

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10

McGregor, B. A. "Production, attributes and relative value of alpaca fleeces in southern Australia and implications for industry development." Small Ruminant Research 61, no. 2-3 (February 2006): 93–111. http://dx.doi.org/10.1016/j.smallrumres.2005.07.001.

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11

Quispe-Peña, EC, AG Poma-Gutiérrez, BA McGregor, and J. Bartolomé-Filella. "Effect of genotype and sex on fiber growth rate of alpacas for their first year of fleece production." Archivos de medicina veterinaria 46, no. 1 (2014): 151–55. http://dx.doi.org/10.4067/s0301-732x2014000100021.

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12

Pallotti, Stefano, Carlos Pacheco, Alessandro Valbonesi, and Marco Antonini. "A comparison of quality of the fleece and follicular activity between sheared and non-sheared yearling alpacas (Vicugna pacos)." Small Ruminant Research 192 (November 2020): 106243. http://dx.doi.org/10.1016/j.smallrumres.2020.106243.

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13

Wuliji, T., G. H. Davis, K. G. Dodds, P. R. Turner, R. N. Andrews, and G. D. Bruce. "Production performance, repeatability and heritability estimates for live weight, fleece weight and fiber characteristics of alpacas in New Zealand." Small Ruminant Research 37, no. 3 (August 2000): 189–201. http://dx.doi.org/10.1016/s0921-4488(00)00127-9.

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14

"Effect of Chemical Treatment on Alpaca Fleece Reinforced Polymer Composites." International Journal of Engineering and Advanced Technology 8, no. 6 (August 30, 2019): 4796–99. http://dx.doi.org/10.35940/ijeat.f9531.088619.

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Fiber which is a fortification reinforced additionally manufactured characteristic investigations demonstrate solitary counterfeit strands like glass, carbon and so on., are utilized in fiber supported plastics. despite the fact that have extraordinary explicit quality, their grounds of utilization are self-same constrained inferable from their characteristic more expensive rate of creation. In this association, partner degree examination has been distributed to frame utilization of Alpaca fleece a fiber plentifully available in Bharat. Regular filaments don't appear to be just strong and lightweight however moreover generally the most reduced. Alpaca fleece compounds are created and their mechanical possessions remain assessed. Mechanical properties of Alpaca fleece /polymer and contrasted and glass fiber/amino..
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15

Quispe, E. C., D. Sacchero, T. Wuliji, and M. D. Quispe. "Evaluation of a new portable device that measures diameter of animal fibres." South African Journal of Animal Science 50, no. 5 (January 12, 2021). http://dx.doi.org/10.4314/sajas.v50i5.7.

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Increasing production of animal fibres has increased the need for a portable instrument that measures fibre diameter and associated characteristics with precision and accuracy. This research evaluated a new portable fibre tester (PFT) by measuring the diameter and related characteristics of tops and scoured fibres of wool, alpaca, and vicuña. The PFT was constructed with integrated mechanical, optical, electronic, and informatic components. Textile tops of sheep wool, alpaca fibres, and mohair goat fibres were used as standard references to calibrate the PFT and determine its accuracy and precision. The results were compared with those from a wool industry standard instrument (OFDA2000) that uses similar technology. The PFT had high accuracy (-0.01, -0.12, and -0.01 μm) for average fibre diameter (AFD) of wool, alpaca, and mohair fibres, respectively. Deviations of standard tops (ST) were within industry-accepted tolerance ranges. Standard errors, indicating precision, were low, ranging from 0.07 to 0.25 μm, 0.02 to 0.44 μm, and 0.09 to 0.024 μm, for wool, alpaca, and mohair fibre tops, respectively. The correlations of measurements of AFD from the two instruments were 0.99 for wool, alpaca, and mohair fibres, but lower for vicuña fibres (0.82). No evidence of bias was observed. Therefore, the PFT may be used as an alternative instrument for measuring fibre diameter and quantifying variation in diameter of wool, mohair, and alpaca fibres. The PFT has appeal for use in the field for practical animal selection and fleece classification based on fibre characteristics. Keywords: alpaca, fibre diameter, mohair, vicuña, wool
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16

Presciuttini, Silvano, Alessandro Valbonesi, Nolberto Apaza, Marco Antonini, Teodosio Huanca, and Carlo Renieri. "Fleece variation in alpaca (Vicugna pacos): a two-locus model for the Suri/Huacaya phenotype." BMC Genetics 11, no. 1 (July 20, 2010). http://dx.doi.org/10.1186/1471-2156-11-70.

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