Comparative analysis of blood protein and progesterone levels in crossbred goats and Damascus in Algeria's arid region
Abstract
The study evaluated the influence of breed and reproductive status on blood progesterone and protein profiles in a sample of ten does aged between 1.5 and 3 years. The female goats were categorized into two equal groups: the Damascus breed and a crossbred group (Damascus x Arbia). All subjects underwent estrus synchronization followed by natural mating. Blood samples were collected at various stages: before the introduction of intravaginal sponges, early pregnancy (30 days after sponge removal), mid-pregnancy (90 days), and late pregnancy (130 days), and the post-partum period at 30 days. The findings revealed a significant (P < 0.01, P < 0.001) impact of reproductive stage on progesterone levels in both groups, alongside notable albumin levels in the Damascus does (P < 0.05, P < 0.01). However, total protein and globulin concentrations did not show significant variations across the physiological phases in either group. Specific effects related to breed were detected in early and mid-pregnancy for progesterone, and in early pregnancy and lactation for total protein levels, and for globulin during lactation. The changes in progesterone and protein profiles across both groups suggest physiological adaptations in the goats to accommodate the increased demands of gestation and lactation in Algeria's arid environment.
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