Influence of Some Blood Parameters on Reproduction Parameters in Ewes of Local Breed

Makhlouf, Asma (2022) Influence of Some Blood Parameters on Reproduction Parameters in Ewes of Local Breed. Doctoral thesis, University of Mohamed Khider, Biskra.

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Abstract

The present research investigates the influence of some blood parameters on reproduction parameters, the effect of the altitude on reproduction parameters and mineral assessment in ewes of local breeds, taking “Ouled Djellal breed” as a sample. The research discusses the rates of fecundity, fertility, and prolificacy at four different sites in relation to some blood parameters. The main aim of the research is to reveal and to highlight the importance of some factors in ewe’s reproduction which implement blood parameters. Thus, it explores the breeding conduct in four sites of different altitudes in Biskra, Algeria. The study puts into practice a number of blood analysis and measurement of reproduction parameters for the sake of finding the values corresponding to the best performances and being able to contribute in embettering them which remains a concern at both the national and the international levels. The study proved the presence of a significant site effect from which Ouled Djellal ewes do not convey their best reproduction performances at high altitudes. It was also found that fertilized ewes had high plasma concentrations of calcium and phosphorus during the mating period. In contrast, plasma levels of magnesium, sodium, and potassium were higher in nonfertilized ewes. Also, the concentrations of the mineral parameters studied are below the physiological norms in the four sites. We also studied the effect of the body condition score on other parameters in the blood and searched for the link between reproductive performance. We found that sugar, cholesterol, triglycerides, albumin, and thyroid hormones were affected by the body condition score, while creatinine, progesterone and total proteins did not have a significant influence on this latter. While total proteins, creatinine, urea and progesterone had no significant effect during the mating period.

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