- BAS judge Liz Barlow examines why fleece scores may differ from one show to another.
- The paper defines the major quality attributes of alpaca fibre (fibre diameter, fibre length, fibre colour, contamination and incidence of medullated fibres). The development of alpaca fleece and skin follicles is then discussed. The connection between the evolution in the textile market and alpaca fibre quality are discussed particularly in regard to fibre diameter variability. Suggestions on the methods of assessing fibre quality in the shearing shed, in the laboratory and in the office are made. Preliminary data from a survey of Australian alpaca fleece quality are presented along with some examples of fibre diameter and medullated fibre histograms produced by measurement on the optical fibre diameter analyser (OFDA). The paper concludes with a brief discussion on the main management and environmental effects on alpaca quality.
Variation of Fibre Characteristics Among Sampling Sites for Huacaya Alpaca Fleeces from the High AndesIn the Huancavelica region of Peru alpacas form the main and often only means of deriving an income for 3300 poor families in 60 communities. Ninety percent of alpacas in the region are Huacaya which are grazed at altitudes 4000–4800 m. Little attention has been paid to alpacas grazed in the High Andes. We aimed to: (i) quantify the variation in alpaca mean fibre diameter (MFD), fibre diameter coefficient of variation (CVD), fibre curvature (FC) and staple length (SL) among 24 sampling sites, (ii) quantify the difference between the mid-side sampling site and other fleece components for each fleece attribute, (iii) identify the sampling site with the highest correlation to the fibre attributes of the fleece in general, and (iv) quantify the relationship between FC and MFD for alpaca. Adult female alpacas (n = 31, mean live weight 71 kg) were sampled and had their fleece weighed in 8 components. Total mean fleece weight was 3.35 kg (range 2.13–6.01). Staples were measured for length (mm) and tested on the OFDA2000 to determine MFD, CVD and FC. The effect of the site was determined using ANOVA analysis. Values for FC were log10 transformed. Correlations between sites and regression analysis between MFD and FC were performed. The mean values for the mid-side site were: MFD 26.3 μm; CVD 20.2%; FC 34.9 °/mm; SL 91 mm, which were finer and longer than other fleece components. The variation in MFD between the 24 sampling sites was 20.2–50.6 μm and between 9 sampling sites in the main fleece saddle was 24.8–31.7 μm. Fleece attributes varied significantly between all fleece components and among fleece sites (P
- The Suri should grow a very lustrous silky dense fibre, which hangs in individual locks, vertical to the body (similar to that of a mohair goat). These locks come in various types, with the ringlet formation and the wave with twist being the most popular.
- In order to study how MTL affecte alpaca fleece growth at the slowest growth period of fleece (2～5 month), 12 pregnant alpacas were injected melatonin (MLT) by 0、 50、100、150 mg from Feb to May. The results showed that MTL caused diameter and stretched length increased significantly. During the experiment the fleece growth rate in treated groups was increased significantly, but MTL had no effects on picking amount and percentage of scoured wool rate. Above all, MTL played a great role in increasing alpaca fleece growth and 100mg was the best dosage.