2012 Cilt 12 Sayı 2
Permanent URI for this collectionhttps://hdl.handle.net/11452/15680
Browse
Browsing by Language "en"
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Observations on nectar availability and bee visitation at patches of yellow star-thistle and chasteberry on the northeast aegean Island of lesvos (Greece)(Uludağ Üniversitesi, 2012) Barthell, John F.; Hranıtz, John M.; Redd, JeAnna R.; Clement, Meredith L.; Crocker, Katherine C.; Becker, Erica C.; Leavıtt, Kara D.; Mccall, Brant; Mıllsnovoa, Megan; Walker, Cassondra M.; Petanıdou, Theodora; Wells, HarringtonWe examined numbers of honey bees (Apis) versus non-Apis bees at patches of yellow star-thistle, Centaurea solstitialis, and chasteberry, Vitex agnus-castus, on the Northeast Aegean Island of Lesvos in Greece. The resulting visitation patterns are associated with average nectar volumes measured from florets of each plant species. Honey bees visit V. agnus-castus more frequently when bees are sampled from adjoining floral displays of both species. In addition, the average size of bee pollinators (as measured by head capsule width) collected during this time was always larger from V. agnus-castus relative to C. solstitialis, and significantly so in the majority of cases. These patterns contrast with findings from previous studies in the western USA (California) where yellow star-thistle is not a native plant species but honey bees commonly visit it. Indeed, in North America, the abundant honey derived from yellow star-thistle is often considered a desirable product for marketing by beekeepers.Item Utilization of forest bıodıversıty: Rewards of ceratonıa sılıqua l. For apıs mellifera(Uludağ Üniversitesi, 2012) Maha, Syouf; Haddad, NizarPlant community of Ceratonia siliqua L. at Wasfi Al-Tal forest reserve was investigated during 26 September to 23 December 2004 to asses the utilization of Ceratonia siliqua L (Carob) for Apis mellifera (Honey bee). Nectar production rate was measured by emptying flowers, covering them for 24 hours with nylon mesh bags, and then sampling their nectar contents. The Ceratonia siliqua L. plant showed good results regarding the nectar volume and concentration and there was good honey bee visitation for pollen and nectar. Male trees were higher than the female ones regarding nectar volume and concentration, the mean volume for male trees was 17.4ml±9.7sd whereas, for the female ones it was only 4.25ml±4.9sd. The mean volume for the nectar concentration for male trees was 63.97%± 10.19sd whereas, for the female ones it was only 29.25%±34 sd.