| Popis: |
Carniolan bees (Apis mellifera carnica) are natively distributed from Central to the south and south-east of Europe. Relocation of the honeybee subpopulations (ecotypes) into the new environment was not widely investigated. The objective of this experiment was to simultaneously compare colony development cycle and performance (honey yealds) or three A. m. carnica subpopulations in two distinct environments in the nativ area. The study was carried out simultaneously at Pannonian region in Croatia (Mala Dapčevica) and Alps, Austria (Lunz am See). Test queen groups at each location contained 12 naturally mated A. mellifera carnica half-sisters originating from Austria (Institut Lunz am See), Slovenia (Agricultural institute of Slovenia) and from Croatia (Faculty of Agriculture Zagreb). The dynamics of colony development was monitored every 14 days using transparent cellophane sheets (Bromenshenk and Lockwood-Ogan, 1990 ; modified method). At each measurement, every frame was taken out and for each side of the frame unsealed, sealed and drone brood, pollen and unsealed and sealed honey (in brood chamber) was drawn to sheet. The surfaces of drawn areas were digitized by computer assisted image analysis. Honey yield per colony was calculated during honey extraction by weighing frames form honey suppers (without brood) prior and after extraction. At Mala Dapčevica location were 3 harvests (Robinia pseudoacacia, Tilia sp. and meadow), while in Lunz am See one (mix from spring and summer). The statistical analysis was performed using the SAS. The differences the test colonies were observed between locations and ecotypes nested within location (sealed brood, pollen, honey yield). |
