Abstract
A total of 153 midside fibre samples, one per animal at left side, were obtained in two shearing periods (I Period: December 2009, n = 109; II Period: March 2010, n = 44) from white Huacaya alpacas belonging to CIPCS – Lachocc herd of National University of Huancavelica. Fibre diameter profiles (FDP) were obtained using the OFDA 2000 instrument, measuring fibre diameter every 5 mm along the entire length of staples (Brims et al., 1999), in a subsample of between 400-800 fibres per animal. Different fibre diameter profile variables were calculated and compared between shearing periods taking into account differences due to sex and age. The variables were the following: average fibre diameter (AFD), maximum and minimum fibre diameter (FDMax, FDMin), its respective positions (PMax, PMin), fibre diameter change along the staple (TACA, calculated as the absolute value of (FDMax - FDMin), and fine ends (FE; calculated as the difference between the mean diameter of fibres in the first (f) and last (l) 5 mm of the staple, and FD: FE = [(f + l)/2]-FD). Results show different FDP for the two shearing periods, being significantly different PMax PMin and FE (P < 0.05). No differences for sex were observed, but age affected AF, FDMax, FDMin, PMax, PMin, TACA and FE (P < 0.05). These results showed, in terms of the needs of textile industry in processing performance, a better quality of fibre obtained during the shearing of December 2009.
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Mayhua, P., Quispe, E.C., Montes, M., Alfonso, L. (2011). Differences in fibre diameter profile between shearing periods in white Huacaya Alpacas (Vicugna pacos) . In: Pérez-Cabal, M.Á., Gutiérrez, J.P., Cervantes, I., Alcalde, M.J. (eds) Fibre production in South American camelids and other fibre animals. Wageningen Academic Publishers, Wageningen. https://doi.org/10.3920/978-90-8686-727-1_6
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DOI: https://doi.org/10.3920/978-90-8686-727-1_6
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