Effect of Dietary Organic Selenium Supplementation on Growth Performance, Carcass Characteristics and Antioxidative Status of Growing Rabbits

Abstract

Total of 45 weaned male New Zealand White (NZW) rabbits about six weeks old with an average initial body weight 618.11±10.01g were randomly allotted to three dietary groups; the first group fed the basal diet without organic Se, the second fed basal diet +0.2 mg Se-yeast, the third fed basal diet +0.2 mg Se-algae. The obtained results showed that supplementation rabbit diets with Se-yeast and Se-algae have no impact on final body weight and average daily body weight gain. Se-algae supplementation tended to increase (P<0.05) average daily feed intake. Rabbits group fed diet supplemented with Se-yeast achieved better (P<0.05) FCR than that group fed Se-algae (5.06 g feed/g gain). Supplementation of Se-algae at 0.2 mg was the highest (P<0.05) in total protein, albumin, and globulin concentration (7.94, 4.16 and 3.78 g/dl). Diets supplemented with Se-yeast or Se-algae significantly reduced plasma creatinine levels compared to the control group. All recorded values of creatinine and urea concentrations were within the normal ranges. Dietary supplementation with 0.2 mg Se-yeast or Se-algae resulted in a significant (P<0.05) decrease in the activity of AST enzyme. Plasma total cholesterol and plasma LDL levels were significantly decreased (P<0.05) with dietary supplementation with Se-yeast or Se-algae. There was a significant (p<0.05) decrease in plasma MDA level in rabbits fed diets supplemented with Se-yeast or Se-algae. While Catalase activity was significantly (P< 0.05) increased. Rabbits fed diet supplemented with Se-algae was the lowest (P<0.05) group in ether extract meat content while dietary supplementation of Se-algae significantly increased (P<0.05) Se content of rabbits meat of hind leg. Conclusively, Se-yeast and Se-algae can be used as selenium sources in growing rabbit diets without causing any adverse effects on growth performance. Besides, their beneficial effects in improving the antioxidative status.

Zinc and/or Selenium Enriched Spirulina as Antioxidants in Growing Rabbit Diets to Alleviate the Deleterious Impacts of Heat Stress during Summer Season

“…Regarding meat composition, our results agreed with the findings obtained by Hassan et al [ 43 ] who mentioned that dietary addition of Se-algae in rabbit diets at level of 0.2 mg/kg diet decreased EE content of meat. Similarly, Hassan et al [ 36 ] reported that 0.5 mg Se algae/kg diet decreased EE content of rabbit meat.…”

“…Furthermore, organic Se is metabolized much more efficiently the inorganic Se forms and could be efficiently utilized for synthesis of selenoproteins under stress conditions Qazi et al [ 42 ]. The positive effect of Zn-Se-Sp on the digestibility of nutrients may be revealed that Se improved the antioxidative status of rabbits Hassan et al [ 43 ]. Moreover, Zn has an oxidative activity Prasad and Bao [ 5 ] which reduces the oxidative capacity and improve animal health.…”

“…Marounek et al [ 44 ] stated that supplemental Se in the rabbit diet had no impact on CP content of meat. However, Se content in the hind leg meat was found to be increased to dietary Se-alga at 0.2 mg/kg diet [ 43 ]. Comparable findings were reported by Marounek et al [ 44 ] and Amer et al [ 45 ] who found that Se-yeast supplementation in rabbit diet deposited in the meat and improved meat quality.…”

“…Similarly, Hassan et al [ 35 ] concluded that Zn-Sp supplementation did not impact AST, ALT, albumin and A/G ratio. Hassan et al [ 43 ] revealed an increase in plasma total protein concentration as a result of Se-algae addition at level of 0.2 mg/kg diet. Likewise, El-Kholy et al [ 46 ] stated that the addition of different forms of Se led to increases in total protein and globulin levels and did not change ALT and AST activities.…”

Influence of bacterial organic selenium on blood parameters, immune response, selenium retention and intestinal morphology of broiler chickens

“…Selenium absorption and retention in the body depend mainly on the ingested form [1]. All recent studies demonstrated that organic Se is more bioavailable than inorganic forms in poultry nutrition [2,3]. Organic Se is usually associated with higher absorption and retention compared to the inorganic form [4].…”