Yazar "Balcioglu, M. S." seçeneğine göre listele

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    Allometric growth of body components in 11 generations selected Japanese quails of different lines
    (Eugen Ulmer Gmbh Co, 2011) Alkan, S.; Mendes, M.; Karabag, K.; Balcioglu, M. S.
    The purpose of this study was to investigate the effects of divergent selection on allometric growth parameters between the body components in 11 generations selected Japanese quails from different lines by using simple monophasic function. The birds were obtained from four genetic lines selected for 11 generations for either high (HL) or low body weight (LL) at a- five weeks of age, a randomly bred control line (C) and a layer line (L) selected for egg production over 120 days. The weekly left and right sides of thigh, back, carcass and breast of quails were collected from five weeks of age to eight weeks of age The results showed that allometric relationship was found between weights of the total thigh and that of the whole body. There was also found an isometric growth between body weight and carcass weight. The growth occurred faster in left side with regard to thigh growth and in right side in terms of wing growth. It may also be concluded that divergent selection significantly affected left and right sides of body growing, and plays an important role in the occurrence of asymmetry in quails.
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    An assessment of embryonic mortality stages in Chukar partridge (Alectoris chukar) by means of classification tree method
    (Eugen Ulmer Gmbh Co, 2010) Karabag, K.; Mendes, M.; Alkan, S.; Balcioglu, M. S.
    Classification tree method is a potentially powerful tool to predict membership of cases in the classes of a categorical dependent variable. The use of classification tree is not widespread in the fields of agriculture. Egg weight, shell thickness, shell weight, shell ratio, egg width, egg length, egg volume, shell surface area were chosen for investigating of their influence on embryonic mortality stages in fertilized eggs of Chukar partridge. All measured and calculated egg parameters were analyzed by classification tree method in this study. According to CTM, the embryonic mortality stages were affected by egg weight (EW), egg volume (EV), blunt-edge shell thickness (BST) and average shell thickness (AST). EW appeared as root terminal node at the classification tree. Embryonic mortality stages were influenced by EV when EW was less than 22.1 g and by BST when EW was greater than 22.1 g. EEM occurred more often than MEM and LEM when EW was less than 22.1 g. However, when EW was higher than 22.1 g, LEM was higher than EEM and MEM. When EW and BST were higher than 22.1 g and 22.3 p, respectively, LEM was about 80.0%. EEM was about 81.2% when EW was less than 22.1 g and EV was higher than 25.1. EEM and LEM occurred but MEM did not occur when AST was higher than 22.3 pm. CTM estimated with an accuracy of 75.6% that EW, EV, BST, and AST primarily affected embryonic mortality stages. Finally, the results of this study showed that this method could be used in the fields of agriculture.
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    Öğe
    Effect of short-term divergent selection for 5-week body weight on growth characteristics of Japanese quail
    (Eugen Ulmer Gmbh Co, 2009) Alkan, S.; Mendes, M.; Karabag, K.; Balcioglu, M. S.
    This study was carried out to investigate the effect of short-term divergent selection for 5-week body weight on growth characteristics of Japanese quail (Coturnix coturnix japonica) and to compare these characteristics with the non-selected randombred control base population. For this aim, Gompertz growth curve model was fitted to body weight-age data of quails in each group. Results of growth curve analyses showed that the shape of the growth curve was not affected by short-term selection. On the other hand, parameter estimates were significantly changed by short-term selection and sex of the quail (P < 0.05). The estimated parameter A or mature weights showed significantly higher values for females than for males in all groups (P < 0.05). The growth rate (K) in HBW and LBW groups (0.561 and 0.503) was significantly higher in males than in females. On the other hand, the K-parameter estimated for females (0.470) and males (0.464) in CONT group was fairly close to each other.