Browsing by Author "Ben Abdelkader, Faten"

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Effects of temperature adjustment with a heating device in weak honey bee colonies in cold seasons
(Springer, 2023-08-16) Çakmak, İbrahim; Kul, Basri; Ben Abdelkader, Faten; Çakmak, Selvinar Seven; ÇAKMAK, İBRAHİM; KUL, BASRİ; Ben Abdelkader, Faten; Çakmak, Selvinar Seven; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Zootekni Bölümü.; Bursa Uludağ Üniversitesi/Arıcılık Geliştirme-Uygulama ve Araştırma Merkezi-AGAM.; Bursa Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu/Elektronik ve Otomasyon Bölümü.; 0000-0003-4063-5521; KFW-7236-2024; FFM-7071-2022; GAF-2568-2022; JGT-5581-2023
Temperature adjustment was used to buffer against changes in external environmental temperature by a heating device. Two groups of honey bee colonies Apis mellifera anatoliaca were used: one as experimental (20) and the other control (10), which were equalized in terms of the number of brood frames, frames with bees, food, hive materials, and health treatments. The experimental colonies were heated during the cold season, and the temperature and humidity inside the hive were recorded. The number of frames of brood, frames of bees, and Varroa destructor mite numbers were also determined for all hives. Results suggest that the number of brood frames and frames with bees increased significantly in the hives with the heating treatment. However, varroa mite numbers also increased significantly in the heated colonies in comparison to the control colonies. Colony losses were significantly less (15%) in heated colonies compared to a 40% loss in control colonies. This is the first account demonstrating that using simple heating devices can support weak colonies during the cold season in general, and colony losses can be reduced significantly from this heating treatment in cold seasons.
Toxicity assessment of chronic exposure to common insecticides and bee medications on colony development and drones sperm parameters
(Springer, 2021-04-12) Ben Abdelkader, Faten; Çakmak, İbrahim; Çakmak, Selvinar Seven; Nur, Zekariya; İncebıyık, Ece; Aktar, Ahmet; Erdost, Hatice; Ben Abdelkader, Faten; ÇAKMAK, İBRAHİM; NUR, ZEKARİYA; İncebıyık, Ece; Aktar, Ahmet; ERDOST, HATİCE; Bursa Uludağ Üniversitesi/Arıcılığın Geliştirilmesi-Uygulama ve Araştırma Merkezi.; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Zootekni Bölümü.; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Üreme ve Suni Tohumlama Anabilim Dalı.; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Histoloji ve Embriyoloji Anabilim Dalı.; 0000-0003-4063-5521; 0000-0002-1438-221X; 0000-0002-2975-2594; AAH-2635-2021; GAF-2568-2022; KFW-7236-2024; CWI-2986-2022; CBC-1744-2022; ETW-1227-2022
The effect of agrochemicals and beekeeping treatments on drones have not been widely investigated compared to workers or queens. In the present study, we investigated the chronic exposure of chemicals set (deltamethrin, acetamiprid, oxalic acid, fumagillin, and amitraz) on some sperm parameters and on the histomorphology of seminal vesicles. We also assessed the colony development and nosema load before and after the exposure. Thirty native Apis mellifera anatolica honeybee colonies with sister queens equalized with brood and total frame of bees were used for this experiment. Five colonies were used for each group. Deltamethrin, acetamiprid and fumagillin were given as oral chronic exposure at final concentrations of 25.10(-6) mg L-1, 0.01 m L-1 and 50 mg L-1 respectively in syrup solution (50/50). Colonies were exposed to oxalic acid by spraying 5 mL per frame space of 3% (w/v) of oxalic acid dihydrate. Finally, the amitraz was applied based on the manufacturer's instructions. The concentrations chosen represented the field-realistic concentrations and those used by beekeepers in the region. Results showed that deltamethrin reduced brood production. In the same group, we found a high increase in nosema load. All treatments decreased sperm count except for fumagillin but this compound increased sperm mortality and increased the percentage of sperm with defected acrosome integrity. The amitraz exhibited a high sperm mortality and high percentage of sperm with defected membrane integrity function. The sperm parameters such as the count, the motility, the acrosome integrity, the membrane function of sperm, and the histomorphology of seminal vesicles of drones exposed to oxalic acid were the most affected. Bee medications commonly used such as oxalic acid and fumagillin should be more investigated and should be considered by beekeepers and particularly queen breeders.