Effect of dietary mannan-oligosaccharides on some blood biochemical, haematological parameters and carcass traits in purebred New Zealand White and crossbred rabbits

Abstract

This study examined the effect of dietary treatments containing mannan-oligosaccharides (MOS) on some blood biochemical, haematological parameters and carcass traits of 60 weaned purebred New Zealand White (NZW) and New Zealand White × Rex (NZW × RX) crossbred rabbits. They were assigned to a 2 × 3 factorial arrangement (two genetic groups; and three dietary treatments of zero, 0.5 or 1.0 g MOS/kg of diet). Blood samples have been collected at slaughter at 10 weeks of age. Significant differences were observed among dietary treatments for all biochemical and haematological parameters with the exception of triglycerides. There was a genetic group and dietary treatment interaction for albumen (P < 0.001), cholesterol (P = 0.002), red blood cell count (RBC) (P = 0.007), haemoglobin (Hb) concentration (P = 0.009) and haematocrit % (P < 0.001) observed. Rabbits from the NZW × RX genetic group fed a diet with 1.0 g/kg MOS had the highest plasma cholesterol level (0.97 ± 0.012 mmol/L), whereas the lowest level (0.89 ± 0.012 mmol/L) was detected in rabbits from the NZW × RX genetic group fed the Control diet. Rabbits from the NZW genetic group fed the diet with 1.0 g/kg MOS had the highest RBC (4.27 ± 0.083 × 106/mm3) whereas rabbits from the same genetic group fed the diet with 0.5 g/kg MOS had the highest Hb concentration (11.43 ± 0.097 g/dL) and haematocrit (30.29 ± 0.163%). Some carcass traits such as liveweight, hot and reference carcass weight (P < 0.001), percentage of periscapular, and perirenal fat relative to reference carcass weight (P < 0.05) were significantly affected by the dietary MOS supplementation. In conclusion, MOS supplementation in the diet, especially 1.0 g/kg, improved immunity, health indicators in the blood, liveweights and carcass weights of rabbits without any harmful effects on the other carcass traits. Furthermore, purebred NZW and NZW × RX crossbred rabbits showed relatively similar performance for all traits of interest. A significant interaction between genetic group and dietary supplementation of MOS was shown for albumen, cholesterol, RBC and haematocrit %.

Breed Effects on Growth Performance, Blood Parameters and the Levels of Metabolic Hormones in Rabbits Under Heat Stress in Egypt

“…Undoubtedly, the growth performance of NZW and Rex in the current study presented a marked deterioration and was certainly lower than those were recorded in earlier findings [42,43], which could be attributed to exposure to relatively higher ambient temperature [9,44]. On the other hand, the current averages of Al-Gabali rabbits were nearer to those documented previously [2,45].…”

Effects of Feed Enhanced with Agri-Mos Prebiotic on Productive Performance, Carcass Traits, Blood Plasma Parameters, Oxidative Status and Histo-Morphologicaly of Growing NZW Rabbits

“…Experimental groups of rabbits subjected to feed 0.75 or 1.0g Agri-MOS-addition (T3 and T5) achieved significantly higher percentage of empty carcass compared to other treatments. Our data are in close agreement with many investigators (Abdel-Hamid andFarahat ,2015 andAbd El-Aziz et al, 2020) who confirmed that carcass traits including the weight of hot and reference carcasses, percentage of perirenal, and periscapular fat relative to reference carcass weight were significantly affected by feeding MOS-supplemented-diets. However, the data of our study are in disagreement with those reported by Rotolo et al, (2014) who found the carcass traits were not affected by supplementing the diet of weaned rabbits with prebiotic oligosaccharides.…”

Growth Performance and Feed Utilization during Fattening Period as Affected by Mannan-Oligo-Saccharides Addition to Californian Rabbits

“…On contrary, Bovera et al (2010) reported that rabbits consumed 1.0 g MOS /kg diet had better body weight gain (P ≤ 0.01) than those consumed antibiotic diet from weanling up to 60 days of age. Abdel-Hamid and Farahat (2016) found that dietary MOS supplementation (1.0 g/kg) elevated immunity, improved health, weights of rabbits. Ewuola et al (2011) and Oso et al (2013) reported that MOS addition resulted in higher (P<0.05) final weight compared to those fed with diet containing probiotics.…”

“…A commercial prebiotic like mannan-oligosaccharide (MOS) comes from the outer cell wall of yeast and could use as a potential prebiotic to improve rabbits health (Attia et al, 2015) as a result of it improves gut microflora balance and has immune-modulatory properties. Moreover, MOS have favorable eff ects on growth and immune reaction of animals (Tewoldebrhan et al, 2017, Silva et al 2017 , laying hens (Hooge, 2004;Bozkurt et al, 2016;Ghasemian and Jahanian, 2016) , broiler chickens (Attia et al, 2014), and rabbits (Abdel-Hamid and Farahat, 2016). Thus, this project aimed to evaluate the effect of mannan-oligosaccharides addition by different levels compared to antibiotic on rabbit performance and feed utilization of Californian rabbits (CAL) under the Egyptian condition.…”