Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Pérou → Estimación de los principales parámetros reproductivos y productivos del Pecari tajacu, Linnaeus, 1758 pecari de collar o sajino en cautiverio (Loreto, Perú)

Universidad Nacional Agraria La Molina (2009)

Estimación de los principales parámetros reproductivos y productivos del Pecari tajacu, Linnaeus, 1758 pecari de collar o sajino en cautiverio (Loreto, Perú)

Rengifo Pinedo, Martha Estela

Titre : Estimación de los principales parámetros reproductivos y productivos del Pecari tajacu, Linnaeus, 1758 pecari de collar o sajino en cautiverio (Loreto, Perú)

Auteur : Rengifo Pinedo, Martha Estela

Université de soutenance : Universidad Nacional Agraria La Molina

Grade : Maestría Producción Animal 2009

Résumé
The objective of this study was to evaluate the classification method of fleece, also, the precision level of the classifier in the classification of fleeces, based in Peruvian Classification System of Wool by laboratory analysis of samples using Sirolan Laser Scan instrument. The study was conducted at SAIS "Pachacutec", located in Marcopomacocha District, Yauli Province, Junín Region. One hundred and forty samples of Corriedale sheep were used : 20 rams, 20 ewes, 20 rams hoggets, 20 ewes hoggets, 20 wethers, 20 wethers hoggets and 20 lambs, the shearing took place in the months of February and March 2007. The analysis of samples were carried out at the laboratory of textile fiber, leathers and furs in the Programa de Investigación y Proyección Social en Ovinos y Camélidos Americanos (POCA). A chi-square test was used to estimate the precision level of the classifier and descriptive statistics to evaluate characteristics of fiber. The mean values for fiber diameter was : 26.06 ± 5.84 microns, with a coefficient of variation 22.46% ; the average for staple length was : 9.27 ± 0.74 cm, with a coefficient of variation of 8.02% ; the wool crimp per centimeter was : 2.44 ± 0.65, with a coefficient of variation of 26.71% and the average percentage for non-fleece was 10.50%. Negative phenotypic correlation was found between : diameter and curvature of the fiber (-0.32), the number of wool crimp per centimeter and diameter of fiber (-0.71), number wool crimp and staple length (-0,044), and diameter and staple length (-0.004), at 5% level was detected, respectively. For rams the analysis showed significance at 5% level and there was not significance for ewes, rams, ewes hoggets, wethers, wethers hoggets and lambs, which means that the precision level of classifier was Bad for rams and Very Good in the rest of the classes

Présentation

Version intégrale (2,02 Mb)

Page publiée le 3 mai 2015, mise à jour le 3 juillet 2018