Effect of Supplemental Mannan Oligosaccharide to Rabbit Diets on Productive and Reproductive Performance of Does During Summer Season in Egypt

Abstract

he objective of this study was to evaluate the effects of dietary mannan oligosaccharide (Bio-Mos) supplementation on reproductive, productive performance and milk production of APRI line rabbit does under high ambient temperature. A total of 40 APRI line rabbit does, 8-9 months old, were divided into four experimental treatments (10 each). Rabbit does were fed ad libitum the basal diet supplemented without (control), with 0.5, 1 or 1.5 g mannan oligosaccharide (Bio-Mos) /kg diet. Animals were provided with water freely. The average daily temperature and relative humidity inside the rabbitry were 31.6±3.8 °C and 77.5±4.8%, respectively. Under heat stress conditions, does weight gain at gestation significantly increased (P<0.001) with increasing dietary MOS supplementation. Pregnant rabbit does given diet containing 1.5 g MOS /kg diet showed the highest weight gain than those fed other dietary MOS levels during the pregnancy period. Daily feed intake of pregnant and lactating rabbit does increased (P<0.05) with increasing dietary MOS level, where rabbit does fed diet containing 1.5 g MOS /kg diet recorded the highest values. The feed conversion ratio was significantly improved (P<0.001) with rabbit does fed diets containing different MOS level (0.5, 1.0 and 1.5 g) during lactation period. The mortality rate of the pups during the lactation period was higher in the control diet compared to diets with 0.5, 1.0 and 1.5 g MOS (32.11 % vs. 25.82, 18.37 and 17.77%; P<0.01, respectively), which could be due to lower milk yield of rabbit does fed unsupplemented diet. Rabbit does fed 1.0 and 1.5 g MOS/kg diet recorded the highest values of letters weights, during the first three weeks. The same trend was obtained at weaning. Rabbit does fed 1.5 g MOS/kg diet recorded the highest net revenue, followed by those fed 1.0 g MOS/kg diet. It could be concluded that supplementing MOS in rabbit does diet significantly improve the overall productive and reproductive performance of rabbits does during pregnancy and lactation periods, in addition to depressing the mortality of pups under high ambient temperature during summer season in Egypt. Therefore, it could be recommended providing rabbit does diet with MOS up to 1.5 g/kg diet is advisable in hot climates, Egypt.

Improve Reproductive and Health Status of Rabbit Does Under Heat Stress by Using Phytogenic and Prebiotic Sources

“…From the results obtained, the mixed form of turmeric and MOS had the highest effect on the weights of rabbits and the feed consumption. This effect of the mixture may be due to the synergistic relationship between turmeric and MOS, as turmeric has a phytobiotic activity (Okanlawon, et al, 2020) similar to that of MOS as a prebiotic (Morsy and Abd El-Lateif, 2017), as it acts as a protection against harmful bacteria to improve nutrient absorption and reflection on the health of the doe. The use of turmeric leads to a balanced gut microbial ecosystem by controlling the growth and colonization of many pathogenic species of bacteria in rabbit gut this is reflected in the better feed utilization reflected in live body weight (Al-Mashhadani, 2015).…”

“…On the other hand, milk yield in this experiment was high in rabbits treated with a mixture of turmeric and MOS, and this increase may be due to the increased litter size from birth to weaning this is in agreement with Okanlawon, et al (2020) and Ragab et al (2021) who reported that doe milk yield is positively related to litter size at weaning. The high intake of feed from rabbits treated with turmeric and MOS was reflected in an increase in milk yield (Nour El-Din, 2015;Morsy and Abd El-Lateif, 2017;Amber, et al, 2020).…”