Variation in fleece characteristics of Awassi sheep at different ages

Citation
Mj. Tabbaa et al., Variation in fleece characteristics of Awassi sheep at different ages, SMALL RUMIN, 41(2), 2001, pp. 95-100
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
SMALL RUMINANT RESEARCH
ISSN journal
0921-4488 → ACNP
Volume
41
Issue
2
Year of publication
2001
Pages
95 - 100
Database
ISI
SICI code
0921-4488(200108)41:2<95:VIFCOA>2.0.ZU;2-8
Abstract
Fleece characteristics have economic significance in sheep. When assessing fiber characteristics, the importance of sex, age of sheep and the body loc ation of the sample taken are important considerations. Triplicate fleece s amples were obtained from the shoulder, right mid-side and hip of 12 male a nd 17 female lambs (6-10 months), 62 yearling ewes (14-20 months) and 235 m ature ewes (28-84 months) by hand shearing. The greasy fleece weight, stapl e length, fiber length and fiber diameter measures were 2.1 +/-0.03 kg, 14 +/-0.18 cm, 24 +/-0.26 cm and 36 +/-0.33 mum, respectively. Correspondingly , the medullated fibers, inner coat, outer coat and kemp fibers were 11.6 /-0.33, 59.7 +/-0.29, 34.0 +/-0.23 and 6.3 +/-0.16%, respectively. Age had a significant influence on body weight and greasy fleece weight, but male a nd females were similar. Body location of the sample had a significant effe ct on the fiber diameter, and percentages of medullated fibers, kemp fibers , and inner coat fibers. The finest fibers and a lower percentage of medull ated fibers were found on the shoulder and mid-side, whereas, the percentag e of inner coat fibers was highest on the hip, Although there was no signif icant interaction between body location and age-sex groups for fiber charac teristics, it was important for staple and fiber length (P < 0.05). The wid e variation in fiber diameter and percentage of medullated fibers suggest p otential for improvement of economical traits. (C) 2001 Elsevier Science B. V. All rights reserved.