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    Effect of hen weight on egg production and some egg quality characteristics in the partridge (Alectoris graeca)
    (POULTRY SCIENCE ASSOC INC, 2007) Kirikci, K.; Gunlu, A.; Cetin, O.; Garip, M.
    A study was conducted to determine the effect of live weight of partridges on egg production and egg quality characteristics. A total of 144 Rock Partridges were divided into control, heavy, middle, and light BW groups at 32 wk of age. Live weights averaged 512.78 g for the control group, 576.18 g for the heavy group, 523.49 g for the middle group, and 473.83 g for the light group. Egg production rates of these groups were 41.44, 45.78, 32.38, and 24.67%, respectively, over an 8-wk period (P < 0.05). Live weight significantly affected egg weight, specific gravity, albumen index, shell weight, shell thickness, Haugh unit, and albumen weight (P < 0.05). Live weight did not affect the shape index, membrane weight, or yolk weight. As a result, the live weights of partridges used for breeding should not be under the average live weights of hens of the stock. On the other hand, other important factors that affect the egg quality of partridges should be investigated.
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    The effect of stocking density on growth performance and average cost in partridge rearing (Alectoris graeca)
    (POULTRY SCIENCE ASSOC INC, 2007) Gunlu, A.; Kirikci, K.; Cetin, O.; Garip, M.
    In this study, stocking density and economic evaluation of partridge rearing was investigated. Experimental design was constructed as 576.9 cm(2)/chick (group I), 384.6 cm(2)/chick (group II), 288.5 cm(2)/chick (group III), and 230.8 cm(2)/chick (group IV). Live weights of the first, second, third, and fourth groups at 12 wk of age were determined as 376.46, 367.95, 371.07, and 358.80 g, respectively. Additive feed consumption and feed conversion ratio of the groups were determined as 1,781.74 g and 4.93, 1,805.13 g and 5.13, 1,830.51 g and 5.15, and 1,720.09 g and 5.02, respectively. Total mortality rates of the groups at the end of the feeding time were determined as 3.5, 3.75, 6.75, and 13.00%, respectively (P < 0.05). As a result, it was concluded that rearing in 288.5 cm(2)/chick was suitable according to live weights of partridges, feed conversion ratio, and mortality rates. Also, it was concluded that decreasing costs and increasing profitability in partridge rearing could be achieved.
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    Effects of sodium bicarbonate, polyethylene glycol and methionine added to rations with sorghum (Sorghum vulgare) in fattening lambs on growth performance, wool quality and some blood biochemical markers
    (ECOLE NATIONALE VETERINAIRE TOULOUSE, 2011) Imik, H.; Gunlu, A.
    The aim of the study was to investigate the effects of sorghum-based rations supplemented or not with sodium bicarbonate, polyethylene glycol (PEG) or methionine on the growth performance, the wool quality and some biochemical parameters in fattening lambs. A total of 35 Morkaraman lambs were randomly allotted in 5 equal groups according to the composition of the rations distributed for 7 weeks: control lambs received a 60% wheat ration while wheat was substituted by sorghum (containing 0.67% tannins) in the 4 assay groups without supplementation or with addition of sodium bicarbonate, PEG or methionine. While the wool quality was not altered in the lambs fed with sorghum, the weight growth was significantly delayed, particularly during the second half of the fattening period, whereas the feed intake was significantly enhanced leading to a significant alteration of the feed efficiency. In parallel, the glycaemia, the calcemia and the sideremia were markedly reduced compared to the controls whereas the antioxidant status was strengthened (decrease in the circulating malondialdehyde concentrations and increase in the serum total antioxidant activity) and the endogenous glutathione peroxidase activity was preserved. When sodium bicarbonate or methionine were used as feed additive, the weight gains were dramatically increased, notably in the second period, leading to a significant improvement of the feed efficiency (despite significant increases in the feed intake) and of the economical benefits. Calcemia, sideremia and glycaemia at a lesser extend were partially restored and the antioxidant / oxidant equilibrium was not significantly altered. By contrast, the PEG addition was less efficient on growth and even induced significant decreases in serum triglyceride and VLDL concentrations compared to lambs supplemented with methionine. These results show that sorghum containing 0.67% tannins will be used with the addition of sodium bicarbonate or methionine in rations for fattening lambs.