Browsing by Author "Nentchev, Peter"
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Item Hyssopus officinalıs l. (Çördük otu) eterik yağının varroa destructor’a karşı kullanımı üzerine gözlemler.(Uludağ Üniversitesi, 2003) Nentchev, PeterBu araştırma Hyssopus officinalis L., çördük otu eterik yağının kış döneminde arı paraziti Varroa destructor’ın üzerinde etkilerinin araştırılması amacıyla yapılmıştır. Araştırma, 1994/1995 yılının kış döneminde gerçekleştirilmiştir. Analiz yöntemlerine göre eşitlenmiş 20 tane arı ailesi kullanılmış ve ergin arılar üzerindeki varroa bulaşıklık yüzdesi belirlenmiştir. 1994 yılının ekim ayında deney grubundaki ailelerin kovanlarına 3 ml Hyssopus officinalis L. yağı 240/40/1 mm şeride emdirilip konuldu ve kovanın dip tahtasına da Varroa’ları yakalamak için yapıştırıcılı karton konuldu. 1995 Yılının şubat ayında yapıştırıcılı karton üzerindeki varroa sayısı belirlendi ve varroa ile bulaşıklık derecesi ve eterik yağın etkisi hesaplandi. Hyssopus officinalis L. eterik yağının uzun vadede V. destructor’a karşı ümit verici ekolojik bir araç olduğu gözlemlenmiştir. Kullanılan eterik yağ kış döneminde kullanıldığında Varroa sayısı artışlarını %80,08 azaltmaktadır. Hyssopus officinalis L. eterik yağı kullanımının arı aileleri üzerinde anormal bir etkisi görülmemiştir.Item Morphometric analysis of honeybees distributed in northern Turkey along the Black sea coast(Uludağ Üniversitesi, 2015-07-20) Fuchs, Stefan; Çakmak, Selvinar S.; Koca, Ayça Özkan; Nentchev, Peter; Kandemir, İrfan; Çakmak, İbrahim; Uludağ Üniversitesi/Mustafakemalpaşa Meslek Yüksek Okulu.The objective of this study was to discriminate the honeybee populations distributed in different regions of northern Turkey, in a land strip approximately following the Black Sea Coast up into Thrace. To assess the morphological variation between populations, a total of 58 colonies was evaluated in statistical analysis based on standard morphometric measurements using 34 morphometric characters. Discriminant function analysis (DFA) yielded high percentages of correct reclassifications between 6 tentative population groups from geographic regions differing in climatic and ecological characteristics. In particular, results showed a gradual character shift from the Eastern end of the distribution (bordering Georgia) to the Western end (bordering Bulgaria) of the sampling area. To explore relations to adjacent subspecies, we included reference samples obtained fromthe Morphometric Bee Data Bank in Oberursel-Germany. This combined DFA confirmed that A. m. anatoliaca is the predominant subspecies in northern part of Turkey extending into Thrace region. A. m. caucasica is prevalent in some Eastern Black Sea locations, but allocations to this subspecies were also found scattered westwards up to Northern Thrace indicating the influence of beekeeper activities. Bees in Southern Thrace were A. m anatoliaca, while those of North Thrace, though mixed, showed close relations to A. m. carnica.Item Observations of ethanol exposure on the queen honey bee Apis mellifera anatoliaca (Preliminary note)(Alma Mater Studiorum, 2009-06) Abramson, Charles, I.; Nentchev, Peter; Wells, Harrington; Çakmak, İbrahim; Çakmak, Selvinar Seven; Uludağ Üniversitesi/Arıcılık Geliştirme Uygulama ve Araştırma Merkezi.; AAH-2558-2021; 57207796431; 36027001700Previous data from this laboratory has shown that consumption of ethanol by worker honey bees disrupts learning, communication and social behaviours. We extend our honey bee model of ethanol induced behaviour by reporting preliminary observations oil a queen honey bee (Apis mellifera anatoliaca Maa) which had consumed 20 mu l of a 10%, 2.0 M ethanol Solution. Our observations reveal that the inebriated queen is accepted back into the colony but is replaced several days later by a new queen possibly as a result of decreased egg laying behaviour. The new queen - which was all offspring of the previous queen - had less hair oil the thorax and all unnatural darker colour. Egg laying was also reduced as suggested by the smaller brood area compared to a control queen. Recommendations are provided when to conduct ethanol experiments with queens.