Impact of different sources of fat on blood metabolites, immune responses, vital signs and hormones in pregnant and non-pregnant ewes under heat stress conditions

Articles in Press

Document Type : Research Paper

Authors

1 Department of Animal and Poultry nutrition, Animal Science Faculty, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran

2 Department of Animal and Poultry nutrition, Animal Science Faculty, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran.

Abstract

This research aimed to compare the effectiveness of different fat sources on vital signs, biochemical and hematological blood parameters, immune responses and hormones in pregnant and non-pregnant ewes under heat stress conditions. For this purpose, 40 ewes were selected (20 pregnant and 20 non-pregnant). This experiment was conducted in the form of a four-by-two factorial experiment based on a completely randomized design with five replications. The treatments included: 1- control diet, 2- diet containing 6% safflower seeds, 3- diet containing 1.5% safflower oil and 4- diet containing 1.5% palm oil. TAccording to the results of the present study, the body temperature, heart rate and breathing rate of the ewes were not affected by the physiological state and the type of fat consumed. The concentration of glucose, triglyceride and blood urea in the non-pregnant group was higher than in the pregnant group (P≥0.05). Different sources of fat could affect the concentration of cholesterol, triglyceride, urea, total protein, albumin, globulin and the ratio of these two . The concentration of beta-hydroxybutyrate, non-esterified fatty acids, malondialdehyde and total antioxidant capacity of pregnant ewes was higher than that of non-pregnant ewes . No significant difference between pregnant and non-pregnant ewes was observed in vital signs, cortisol concentration, insulin and immune responses. Adding different fat sources decreased the concentration of cortisol, malondialdehyde and non-esterified fatty acids and increased the total antioxidant capacity. Considering the positive effects of fat sources on cortisol and total antioxidant capacity, using these sources is recommended during heat stress.

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Iranian Journal of animal Science

Articles in Press, Accepted Manuscript
Available Online from 03 February 2025

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History

  • Receive Date: 24 December 2024
  • Revise Date: 29 January 2025
  • Accept Date: 29 January 2025

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