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Asian Journal of Animal and Veterinary Advances

Year: 2021 | Volume: 16 | Issue: 1 | Page No.: 20-29
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Authors

Ramadan D. El Shoukary

Ramadan D. El Shoukary

Fatma A. Mahmoud

Fatma A. Mahmoud

Keywords

Research Article

Effect of Dietary Yeast on Male Dromedary Camels During the Rut: Behavioral and Biochemical Insights

Ramadan D. El Shoukary Ramadan D. El Shoukary's LiveDNA and Fatma A. Mahmoud Fatma A. Mahmoud's LiveDNA
Background and Objective: Camels used as meat-producing animals in Egypt, but suffer from economic losses represented by a 25% decrease in body weight due to a partial loss of appetite during rutting season. This study examined the impact of dietary addition of dried baker’s yeast (Saccharomyces cerevisiae) on behavioral and biochemical parameters of male Dromedary camels during a rutting period. Materials and Methods: Data from male Dromedary camels in a rut with an average age of 5-7 years and weighing between 385 and 400 kg were collected after three months of dietary addition of dried baker’s yeast compared to control (basal feed only). The behavioral observation was performed two days a week, (1 hr per day) for both groups via a continuous focusing sampling. At the end of the experiment, 16 blood samples were collected for biochemical analysis. Results: The addition of yeast to the diet significantly increased the frequency and duration of the different behaviors, however, standing and sexual behavior showed no significant change; only aggressive behavior appeared to be lower in yeast-fed camels. Due to yeast supplementation, growth performance parameters have shown significant improvement (p<0.05); in most of the studied traits, except for the leftover trough. Increases in the total protein, albumin, globulin and Albumin/Globulin (A/G) ratio and glucose, urea, calcium and phosphorus levels were observed in the yeast-fed camels; serum cholesterol, triglycerides, cortisol, testosterone, T3 and T4 decreased with yeast supplementation, whereas the liver enzymes (AST and ALT) and creatinine levels did not alter. Conclusion: Dietary supplementation of yeast provided beneficial effects on behaviors, growth performance and blood parameters of camels during rut, moreover, the recommended dose for camels at rut represented 40 g active dried yeast.
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