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    Analysis of repeated measures by using multivariate method
    (2006) Sahinler, Suat; Gorgulu, Ozkan
    The present study was carried out to explain the analysis of repeated measures by using the multivariate test statistic which is suitable when the assumptions validity for univariate methods for repeated measures is dubious. Special attention was given to the test of assumptions, illustration of the multivariate analysis of repeated measures and comparative discussion with univariate methods from the point of view that the effects on the statistical inferences of lacking or making wrong statistical procedures. Results showed that how much important the necessity of validation of the assumptions for univariate statistical test for repeated measures and how much their influences on test results and interpretation are great of importance. © 2006 Asian Network for Scientific Information.
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    Bootstrap and Jackknife Parameter Estimation of the Models Fitting to Lactation Milk Yield (2x305) on Calving Age
    (Taylor & Francis Ltd, 2008) Sahinler, Suat; Karakok, Serap Goncu
    To predict lactation milk yield as dependent upon calving age 5 of the best-known mathematical models based on least squares, bootstrap and jackknife regression were fitted to data and several criteria based on the analysis were used to compare models. The second order, Ali and Schaffer and Wood models were determined better than other models, first one being the best in view of R-2, AIC and BIC and the best fitting method was the bootstrap.
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    Determination of Honey Botanical Origin by Using Discriminant Analysis
    (Medwell Online, 2009) Sahinler, Suat; Sahinler, Nuray; Gul, Aziz
    One of the most important criterions is determination of honey botanical origin in point of the sense of taste, the force of habit and quality of honey and the results of this, in preference of honey. The purpose of this study, is to discriminate the honey type using a linear discriminant function on the basis of honey chemical characteristics by using discriminant analysis, which is one of the multivariate techniques and has recently been much used in applied sciences. In this study, independent variables, mineral content (%), moisture (%), pH, acidity (meq), invert sugar (%), sucrose (%), diastase level and HMF (mg) belonging to 5 types as sunflower, citrus, cotton, pine and high plateau honeys were used. The discriminant functions from different combinations of variables on the basis of honey chemical characteristics were given and the cases from the original honey botanical origins, sunflower, citrus, cotton, pine and high plateau, could be classified 100% correctly by using these functions.
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    Diet selection and eating behaviour of lactating goats subjected to time restricted feeding in choice and single feeding system
    (Elsevier Science Bv, 2008) Gorgulu, Murat; Boga, Mustafa; Sahin, Ahmet; Serbester, Ugur; Kutlu, Hasan Ruestue; Sahinler, Suat
    This study was carried out to investigate diet selection and eating behaviour of lactating German Fawn x Hair Crossbred,oats in different feeding methods and levels. Twenty German Fawn x Flair first backcross does (B(1)) were allocated into 4 treatment groups (2 feeding methods single (TMR) and choice feeding x 2 feeding levels act libitum and restricted) with 5 replicates. Restricted feeding was applied only 4 h feed allocation during day. Barley, corn, soybean meal, corn gluten meal, wheat bran and alfalfa hay were Deed ingredients for single and choice feeding. Eating patterns, milk yield and composition were determined for S weeks. The following results were obtained: (1) the meal criteria for goats restricted single and choice-fed, ad libitum single and choice-fed were determined as 1.00 and 0.63, 12.88 and 10.23 min, respectively. (2) Ad libitum feeding increased meal size, meal length, intermeal interval, total eating duration and decreased eating rate and meal number. compared to restricted feeding (p<0.01). Choice feeding decreased meal size (P<0.05), meal length (p<0.01) and increased eating rate and meal number (P<0.01), compared to single feeding. Restricted fed goats decreased intermeal interval in single feeding compared to choice feeding (P<0.01), but increased meal number in choice feeding (P<0.01). (3) Ad libitum choice-fed does made a diet containing 12.79% corn, 35.41% barley. 13.21% wheat bran, 5.35% soybean meal, 1.28% corn gluten meal and 29.80% alfalfa meal while restricted choice-fed does made a diet having more corn (27.69%), corn gluten meal (5.62%) and wheat bran (16.17%) and less barley (14.37%) and soybean meal (4.51%). (4) Choice feeding decreased RUP intake (P<0.05) without affecting milk protein, irrespective to feeding levels, while having a tendency to increase in milk yield (14.2%) and 4% FCM (8.8%). (5) Restricted feeding decreased DM, ME. ADF and NDF intakes (P<0.05) with concomitant decreases in 4% FCM, total milk solid, ash and fat compositions (P<0.05), irrespective to feeding methods. (6) Choice-fed goats changed their preferences for a possible synchronized nutrient intake during a daytime, as sorted barley, soybean meal and alfalfa hay from early morning to late afternoon. It could be concluded that choice-fed goats have the ability to make their diet to meet nutrient requirements and had a tendency to increase in milk yield. Restriction in feeding time resulted in lower feed intake and milk yield. although the animal changed their feed preference in favour of high quality ingredients and eating pattern with lower meal criterion and intermeal interval. (C) 2008 Elsevier B.V. All rights reserved.
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    Effects of divergent selection methods based on body weights of quail on improvement of broiler quail parents
    (2009) Baylan, Mikail; Canogullari, Sibel; Sahinler, Suat; Uluocak, A. Nazim; Copur, Gulsen
    The purpose of this study, was to investigate the effects on body weight, weight gain, feed intake and feed efficiency of different selection methods for Body Weight (BW) in Japanese quail. For this purpose, line M55 was subjected to individual selection for 5 week BW while, a reciprocal recurrent selection method was applied to lines R33 and S55. Selection lasted 2 generations. Five weeks body weights in the parents of M55, R33 and S55 lines were obtained and were 273.5, 258.9 and 259.0 g in the beginning generation; 282.9, 284.8 and 279.5 g in the first generation and 284.6, 285.5 and 284.3 g in the 2nd generation. Average 5 weeks old body weights in the offspring of mass selection lines (M55) and offspring of cross-bred lines (R3S5 and S5R3) obtained from reciprocal mating were 279.5, 267.3 and 264.0 g in the 1 st generation and the values obtained were 300.7, 300.5 and 300.2 g in the 2nd generation. In the 2nd generation, body weight increases were higher than the 1st generation, especially in the reciprocal selection lines. Feed consumption of the 1st generation in M55, R3S5 and S5R3 lines were 768.62, 682.61 and 674.18 g and in the 2nd generation were 776.77, 790.64 and 791.71 g, respectively. Feed conversion efficiency was also calculated and was 2.83, 2.63 and 2.63 in the 1st generation and 2.66, 2.71 and 2.73 in the 2nd generation. Applying different selection methods in the present study seeking to increase body weight in quails either in parents or in offspring showed that reciprocal selection lines resulted in higher body weight than initial body weight. Feed consumption and feed conversion efficiency are similar to in the reciprocal selection lines both in the 1st and 2nd generations. © Medwell Journals, 2009.
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    Effects of Divergent Selection Methods Based on Body Weights of Quail on Improvement of Broiler Quail Parents
    (Medwell Online, 2009) Baylan, Mikail; Canogullari, Sibel; Sahinler, Suat; Uluocak, A. Nazim; Copur, Gulsen
    The purpose of this study, was to investigate the effects on body weight, weight gain, feed intake and feed efficiency of different selection methods for Body Weight (BW) in Japanese quail. For this purpose, line M(55) was subjected to individual selection for 5 week BW while, a reciprocal recurrent selection method was applied to lines R(33) and S(55). Selection lasted 2 generations. Five weeks body weights in the parents of M(55), R(33) and S(55), lines were obtained and were 273.5, 258.9 and 259.0 g in the beginning generation; 282.9, 284.8 and 279.5 g in the first generation and 284.6, 285.5 and 284.3 g in the 2nd generation. Average 5 weeks old body weights in the offspring of mass selection lines (M(55)) and offspring of cross-bred lines (R(3)S(5) and S(5)R(3)) obtained from reciprocal mating were 279.5, 267.3 and 264.0 g in the first generation and the values obtained were 300.7, 300.5 and 300.2 g in the 2nd generation. In the 2nd generation, body weight increases were higher than the 1st generation, especially in the reciprocal selection lines. Feed consumption of the 1st generation in M(55), R(3)S(5) and S(5)R(3) lines were 768.62, 682.61 and 674.18 g and in the 2nd generation were 776.77, 790.64 and 791.71 g, respectively. Feed conversion efficiency was also calculated and was 2.83, 2.63 and 2.63 in the 1st generation and 2.66, 2.71 and 2.73 in the 2nd generation. Applying different selection methods in the present study seeking to increase body weight in quails either in parents or in offspring showed that reciprocal selection lines resulted in higher body weight than initial body weight. Feed consumption and feed conversion efficiency are similar to in the reciprocal selection lines both in the 1st and 2nd generations.
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    Effects of drip irrigation management and different soilless culture on yield and quality of tomato grown in a plastic house
    (2006) Sezen, S. Metin; Celikel, Gulendam; Yazar, Attila; Mendi, Yesim Yalcin; Sahinler, Suat; Tekin, Servet; Gencel, Burçin
    This study was carried out to determine the most suitable irrigation scheduling of fresh market tomato (Fantastic-144) grown on volcanic ash, peat and their mixture (1:1) under Plastic house conditions at Alata Horticultural Research Institute in the Mediterranean Region of Turkey in 1998. The quality and yield response of Fantastic-144 to trickle irrigation was also investigated. Four different irrigation levels (WL1 = 75%, WL2 = 100%, WL3 = 125% and WL4 = 150% of Class A Pan evaporation) and two irrigation frequencies (once and twice daily applications) were evaluated. Highest yield and fruit number were obtained from the ash+peat (1:1) with irrigation once a day at WL4 and ash+peat (1:1) with twice a day watering at WL3 and WL4 irrigation levels. Soluble solids of tomato fruit decreased with increasing available water. The highest WUE value of 67.5 kg m-3 was obtained from WL1 with peat+ash (1:1). WUE decreased in all treatments as the amount of irrigation water increased. © 2006 Asian Network for Scientific Information.