Effect of different altitude on reproductive performances and mineral assessment in Ouled Djellal ewes during the mating
- PDF / 328,279 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 63 Downloads / 174 Views
REGULAR ARTICLES
Effect of different altitude on reproductive performances and mineral assessment in Ouled Djellal ewes during the mating period Asma Makhlouf 1 & Mohammed Titaouine 1
&
Hanane Mohamdi 2 & Fadjria Yakoub 1
Received: 23 January 2020 / Accepted: 21 July 2020 # Springer Nature B.V. 2020
Abstract The aim of this study is to evaluate reproductive performances and to reveal the influence of mineral profile on Ouled Djellal ewes reared in different sites during their mating period. Two hundred twenty-six clinically healthy and nonpregnant Ouled Djellal ewes have been used and assigned to four groups according to altitude factor (two plain regions, one tableland region, and one mountain region). In all groups, oestrus was synchronized with ram affect method, and the ewes were naturally inseminated; it was conducted during the month of May for all herds. After 5 months of gestation, reproductive parameters were calculated. Concerning the determination of plasma mineral parameters and its influence on reproduction parameters, blood samples were taken from all ewes on the day of introduction of entire rams into all herds. The analyzed variables were fertility, prolificacy, and fecundity, and their overall averages were 78%, 117%, and 92%, respectively, which are well below the averages in flocks reared in intensive mode. However, the lowest rates are recorded at mountain region (Aïn Zaatout) with 65%, 109%, and 71%, respectively. Plasma sodium and potassium were significantly lower in fecundable ewes than in non-fecundable ewes, whereas plasma calcium levels were significantly increased. The region showed in this study a significant influence on all plasma levels of major minerals during mating period. This study made it possible to describe the evolution of some mineral elements in ewes according to whether they are fecundable or not and according to the region (mountain, tableland, plain) during the mating period. This gave us useful information on the impact of plasma minerals levels on reproductive parameters. Keywords Altitude . Reproduction parameters . Ouled Djellal ewes . Mineral profile . Mating period
Introduction In Algeria, the sheep herd represents the largest animal resource; it is estimated at more than 26 million heads of which
* Mohammed Titaouine [email protected] Asma Makhlouf [email protected] Hanane Mohamdi [email protected] Fadjria Yakoub [email protected] 1
Genetics, Biotechnology and Valorisation of Bioressources Laboratory(GBVB), University of Biskra, PO Box 145 PR, 07000 Biskra, Algeria
2
Directorate of Agricultural Services in Biskra Governorate, Amir Abdelkader Street, Biskra, Algeria
80% are of breeding ewes (M.A.D.R. 2016). Despite its economic and social importance, sheep farming is poorly managed in terms of the technical organization and the function of its production systems (Benyounes et al. 2013a), as well as the environmental conditions and the methods of conduct adopted that are at the origin of low productivity. Improving the productivi
Data Loading...
