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Articles by Ahmet Sahin
Total Records ( 4 ) for Ahmet Sahin
  Mustafa Boga , Ahmet Sahin , Unal Kilic and Murat Gorgulu
  This study was carried out to investigate whether cafeteria feeding affects behaviour of newborn milk fed dairy calves. Twenty Holstein Friesian calves were divided into two treatment groups single (TMR) and cafeteria feeding. Each calf was observed once a week for a period of 1 h at 5 min intervals at different times of a day after the initiation of daily feeding to monitor eating, ruminating, drinking, licking objects, playing, resting, body care and idle standing activities. The proportional count of eating, ruminating, drinking, licking objects, playing, resting, body care and idle standing were determined as 5.33, 6.52; 5.56, 8.89; 1.36, 1.09; 5.61, 5.14; 2.19, 1.60; 64.00, 62.58; 2.89, 3.59, 12.82 and 10.14%, respective to feeding systems TMR and cafeteria. There were not any statistically significant difference between cafeteria and TMR calves with respect to growth performance and blood parameters, except urea concentration, which was higher in cafeteria calves. In conclusion, cafeteria feeding increased welfare status of calf by decreasing idle standing behaviour and increasing body care without affecting growth performance significantly. Also, pre-ruminant calves in cafeteria feeding are able to make their own diet, more nitrogenous and less fibrous, as more appropriate to their digestive physiology.
  Sebnem Atasaral Sahin , Ahmet Sahin and Ibrahim Okumus
  Timing and density of spat settlement on artificial collectors Polypropylene (PP) and hemp with growth and culture potential of Mediterranean mussel, Mytilus galloprovincialis were studied at two sites (Trabzon-Sana and Rize) in the Southeastern Black sea coast. The growth of the mussels and environmental parameters were measured monthly from May 2003 to April 2004. Two different spat collectors (PP and hemp) hung on long-line mussel systems in April 2003. First observation of spat settlement at each sites was started in May. Mean value of spat settlement was determined as 7659±1495 mussels/m in Sana and 5774±1438 mussels/m in Rize. There was no significant difference found between spat collector ropes. Mean value of spat length was determined as 0.07±0.003 mm in Sana, 0.09±0.004 mm in Rize. At the end of the study, shell length of mussels reached 40.39±1.184 mm in Sana and 46.20±0.547 mm in Rize. In conclusion for mussel culture enough seed can be collected but spats must be stripped in 1 or 2 months after settlement and that mussels would be market size in 1+ years.
  Irfan Emre , Dilek Turgut-Balik and Ahmet Sahin
  In this study, total 8 species (Section Cicercula) belong to 14 different geographic distributions collected from Turkey have been studied for the analysis of seed storage protein profiles to examine their relationship by Sodium Dodecyl Sulphate Polyacrilamide Gel Electrophoresis (SDS-PAGE) technique. Hierarchical cluster analysis and Euclidean distance were used for comparison between species and calculating the genetic resemblance respectively. Dendogram was formed using average linkage. Electrophoretic protein profiles of seed cotyledons were showed that all species formed two clusters. The first one consisted of the L. stenophyllus, L. hirsutus, L. chloranthus, L. cicera and L. sativus second one by three species (L. annuus, L. cassius and L. phaselitanus). In addition, very little differences were observed in total protein profiles of the examined sample species (L. cicera, L. hirsutus and L. chloranthus) from nine geographical regions belong to section Cicercula. Protein amount was found to be highest in L. hirsutus and lowest in L. cicera.
  Ahmet SAHIN , Bulent MİRAN , Ibrahim YILDIRIM , Alper ONENC and Ahmet ALCICEK
  The primary purpose of this study was to calculate the fattening costs of different cattle breeds reared under controlled conditions and to determine the optimal fattening period that will maximize the net profit. The data were from 21 bullocks consisting of 7 Holstein, 7 Piedmont Holstein, and 7 Limousin x Holstein cross-breed cattle reared and fattened in the closed tie-stall experiment barns of the Aegean Agricultural Research Institute, Turkey. The data used for the analysis were from the year 1999, but were updated for 2007. The fattening period lasted 280 days, after a rearing period of 195 days. The average live weight, costs of 1 kg live weight, yield ratio, and net profit per animal at the end of fattening period were 510.86 kg, YTL 3.65, 57.36%, and YTL 462.33, respectively. The Limousin breed yielded the highest net profit. The optimal fattening period was 5 months. Net profit increased by 21.67%, while the costs of 1 kg live weight decreased by 13.97% at optimal fattening relative to the fattening period in the application. Live weight, yield ratio, meat price, gross production value, production costs, and net profit per animal differed significantly among the Holstein, Piedmont, and Limousin breeds. The results indicated clearly that the optimal fattening period (5 months) yielded much more net profit in comparison with the fattening period in the application. It appears possible to arrange different plans for different cattle breeds.
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