Reproductive behavior in hair sheep rams under tropical conditions.

Tropical Animal Health and Production
Jesús Ricardo Aké-VillanuevaJosé Candelario Segura-Correa

Abstract

The reproductive efficiency of sheep herds depends to a great extent on the ram. Male reproductive evaluation allows to select for the best and eliminate those with reproductive problems. The objective was to evaluate the effect of breed and age group on the reproductive behavior of hair sheep rams in the tropics of Mexico. Pelibuey (n = 42), Blackbelly (n = 30), Dorper (n = 44), and Katahdin (n = 30) rams of two age groups: young (n = 74, 1-1.5 years old) and adult (n = 72, 2-4 years old) were evaluated. Serving capacity (10-min duration) and breeding soundness evaluation (BSE) tests were carried out in each ram. In the first test, rams were classified as suitable and unsuitable, and in the BSE test, they were classified as satisfactory, questionable, or unsatisfactory. The response variables were analyzed using chi-square test or analyses of variance (ANOVA). ANOVA included the fixed effects of breed, age group, and their interaction. In the serving capacity test, 79.5% of the rams were considered suitable, with no breed differences (P > 0.05). Adult rams (90.3%) had the highest proportion of suitable rams (P < 0.05). In the BSE test, 80.2% of the rams were satisfactory; only breed being significant (P < 0.05). Pelibuey breed...Continue Reading

References

Sep 1, 1992·Journal of Animal Science·A PerkinsE O Price
Mar 1, 1991·Journal of Animal Science·E O PriceM R Dally
May 1, 1988·Journal of Animal Science·L S KatzJ J Zenchak
May 1, 1984·In Practice·A Russel
Mar 1, 1996·Journal of Animal Science·E O PriceP H Hemsworth
Apr 16, 1998·Journal of Animal Science·R W GodfreyM L Gray
May 20, 2000·Small Ruminant Research : the Journal of the International Goat Association·A KaragiannidisI Amarantidis
Apr 11, 2001·Small Ruminant Research : the Journal of the International Goat Association·S A. SalhabR Kassem
Jun 25, 2002·Journal of Animal Science·G D SnowderL D Van Vleck
Jan 17, 2004·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·B Sas-KorczynskaJ Skolyszewski
Jan 30, 2004·Behavior Research Methods, Instruments, & Computers : a Journal of the Psychonomic Society, Inc·Kristine Y Hogarty, Jeffrey D Kromrey
May 26, 2004·Theriogenology·Melpomeni AvdiPhilippe Chemineau
Oct 18, 2005·Theriogenology·Panagiotis E SimitzisJoseph A Bizelis
Mar 15, 2006·Animal Reproduction Science·J N Stellflug, G S Lewis
Feb 1, 1988·Theriogenology·O A OsinowoG A Ekpe
Jun 23, 2009·Archives de pédiatrie : organe officiel de la Sociéte française de pédiatrie·F SorgeD Gendrel
Mar 1, 2012·Reproduction in Domestic Animals = Zuchthygiene·M A Cárdenas-GallegosJ G Magaña-Monforte
Mar 6, 2012·Preventive Veterinary Medicine·David C Van MetrePaul S Morley

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