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Nineteen Junín lambs at days 0 (birth), 30, 60, 90 and 120 (weaning) were evaluated. The objectives were: a) knowing the variations of 14 characteristics related to the density of fibers, ducts and incidences of fiber bundles, the diameter and growth of fibers and those linked to the skin expansion, and live weight of Junín lambs from birth to weaning, and, b) analyze the trends and relationships between them. Fibers, and ducts density (FibDen, and DucDen, respectively), fibers and ducts number per tattooed skin area (N°Fibers/APT, and N°Ducst/APT, respectively), incidence of bundles of one fiber (I_Bund1F), two-fiber (I_ Bund2F), three-fiber (I_ Bund3F), four-fiber (I_ Bund4F), average fiber diameter (AFD), fiber growth (FibGrow), tattooed skin area (TSA), horizontal, and vertical length of the TSA (HL_TSA, and VL_TSA, respectively), and live weight (LW) were the variables evaluated. The FibDen, DucDen, I_Bund1F, I_ Bund 2F, I_ Bund 3F, I_ Bund 4F were determined by the procedure, and device known as Fiber Den; LW was evaluated with a scale; AFD was evaluated with the Fiber EC device; HL_TSA, VL_TSA, and FibGrow were measured with a millimeter metal ruler; while APT, N°Fibers/TSA, and N°ducts/TSA were calculated based on some variables indicated above. The completely random design was used to evaluate effects of the days on the 14 variables, the Duncan test was used to compare means, linear and curvilinear regression models were used to evaluate trends, and the Pearson correlation was used to evaluate the relationships among the variables. The results found were: The 14 variables evaluated varied significantly over the days (p-value<0,05). Likewise, the FibDen, DucDen, I_Bund2F, I_Bund3F show oscillations with more increases than decreases, statistically significant (p-value < 0.05), while the N°Fib/TSA, N°Duc/TSA, I_Haz4F, MDF, FibGrow, LH_TSA, LV_TSA, TSA and the LW are continuously increased, although the I_Bund1F also shows oscillations showing mostly decreases, with significant differences between evaluation days. On the other hand, it was found that FibDen, and DucDen are inversely related to AFD, and LW, but that with FibGrow, and TSA there is no significant linear relationship, while AFD has a direct relationship with LW, but with FibGrow, and TSA has no linear relationship some. It is concluded that, many characteristics were determined in an unprecedented way for the Junín breed, and also in the face of the evidence that FibDen, and DucDen can be evaluated in a practical and non-invasive way, and being related to the AFD and other characteristics, they could be used as selection criteria. [ABSTRACT FROM AUTHOR]

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This methodological investigation aims to define a concept of asymmetry for qualitative variables, quantify it, and show its validity. A panel of five expert judges and Monte Carlo simulations were used. The statistic Mean Difference in Frequency (MDF) between pairs of categories ordered by frequency homogeneity was defined. The MDF statistic showed a behavior adjusted to expectations with different variants of the binomial distribution. The correlation between the mean skewness score of the judges and MDF was very high. To obtain interpretive guiding cutoffs, 20,000 samples of sizes 20, 40, 100, 200, 500, and 1000 were simulated, drawn from a binomial distribution. It is concluded that MDF is validity to measure asymmetry in qualitative variables. [ABSTRACT FROM AUTHOR]

Copyright of Actas de Diseño is the property of Facultad de Diseno y Comunicacion, Fundacion Universidad de Palermo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)