Evaluating the reproductive ability of breeding rams in North-Eastern Spain using clinical examination of the body and external genitalia

BMC Veterinary Research

Research Article

Ana Isabel Galeote¹  Enrique Fantova¹  René Mozo²  José Luis Alabart³  José Folch³ 

[1] Oviaragón-Grupo Pastores, S.C.L. Mercazaragoza, Camino Cogullada s/n, 50014, Zaragoza, Spain;Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria (CITA), de Aragón, Av. Montañana 930, 50059, Zaragoza, Spain;Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria (CITA), de Aragón, Av. Montañana 930, 50059, Zaragoza, Spain;Instituto Agroalimentario de Aragón – IA2 - (CITA-Universidad de Zaragoza), Zaragoza, Spain;

关键词: Breeding soundness evaluation;    Sheep reproduction;    Ram clinical examination;    Sheep breeding;    Rasa Aragonesa;    Risk of failure;   

DOI  :  10.1186/s12917-015-0600-9

 received in 2015-07-23, accepted in 2015-11-18,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundPredicting the ability of rams to detect, mate and fertilise ewes in oestrus accurately is certainly difficult; however, tests based on clinical examinations have been performed to assess the overall potential capacity of rams to serve and impregnate ewes. Clinical examinations for breeding soundness evaluation were carried out in 897 Rasa Aragonesa (RA) rams from 35 flocks in North-Eastern (NE) Spain. Clinical examinations of head, trunk, limbs and genitals were performed in each ram. Blood samples were collected for a serological study of Brucella ovis. The sheep owners were surveyed regarding the characteristics of the flock, rams’ health history and the management of rams. The clinical alterations found were classified according to severity (mild or severe). Rams were classified as suitable (without lesions or with only mild lesions) or unsuitable (with severe lesions) for breeding depending on the results of the clinical examinations.ResultsThe results showed that 60.6 % of rams presented some type of alteration (mild: 43.3 %; severe: 17.3 %) in various body parts (genitalia: 31.6 %; head and trunk: 37.2 %; limbs: 15.5 %), and that 16.7 % of rams were classified as unsuitable breeders. The most common genital alterations were ulcerative posthitis (18.7 %) followed by testicular lesions (5.3 %). The highest prevalence of unsuitable breeders was found in the category of adult and aged rams (13.8 % and 37.4 %, respectively) and in the category of emaciated rams (33.3 %). All rams examined were seronegative to Brucella ovis. The mean percentage of rams in flocks was 2.8 % (min: 1.6 %; max: 4.6 %); nevertheless, this percentage dropped to 2.5 % (min: 1.4 %; max: 3.7 %) and 2.1 % (min: 0.3 %; max: 3.5 %) when only suitable or effective (suitable mature) rams were considered.ConclusionThus, it is concluded that there are fewer effective rams in farms than farmers realise. Frequent clinical examination of males is recommended in order to identify potentially infertile rams.

【 授权许可】

CC BY   
© Mozo et al. 2015