Browsing by Author "Clement, Meredith L."
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Item Foraging response of turkish honey bee subspecies to flower color choices and reward consistency(Springer/Plenum Publishers, 2010-03) Song, Daniel S.; Mixson, T. Andrew; Serrano, Eduardo; Clement, Meredith L.; Savitski, Amy; Johnson, Ge'Andra; Giray, Tuğrul; Abramson, Charles Ira; Barthell, John F.; Wells, Harrington; Çakmak, İbrahim; Uludağ Üniversitesi/Mustafakemalpaşa Meslek Yüksekokulu/Bitkisel ve Hayvansal Üretim Bölümü.; AAH-2558-2021; 57207796431Foraging behavior of Apis mellifera caucasica, A.m. carnica and A.m. syriaca in Turkey was studied for intrinsic subspecies-based differences. Models of forager flower-color fidelity, risk sensitive behavior and maximizing net gain were tested. Foragers were presented artificial flower patches containing blue, white and yellow flowers. Some bees of each subspecies showed high fidelity to yellow flowers, while others favored blue and white flowers. The degree of fidelity, however, differed among subspecies and was dependent upon which color was favored. Bees of all subspecies demonstrated risk indifferent behavior regardless of whether they favored yellow flowers or blue and white flowers. Flower handling time differed among subspecies and increased with reward quantity, and when a reward was present. Flight time between consecutive flowers also differed among honey bee subspecies. Foragers of all subspecies had a higher net gain when visiting flowers with consistent rewards.Item Nectar secretion and bee guild characterıstıcs of yellow star-thistle on Santa Cruz island and lesvos: where have the honey bees gone(Uludağ Üniversitesi, 2009) Barthell, John F.; Clement, Meredith L.; Song, Daniel S.; Savıtsk, Amy N.; Hranıtz, John M.; Petanıdou, Theodora; Thorp, Robbin W.; Wenner, Adrian M.; Grıswold, Terry L.; Wells, HarringtonWe compared nectar secretion rates and bee guilds of yellow star-thistle, Centaurea solstitialis, on Santa Cruz Island (USA) and the Northeast Aegean Island of Lesvos (Greece). This plant species is non-native and highly invasive in the western USA but native to Eurasia (including Lesvos). “Nectar flow” was assessed by measuring nectar volumes in florets of flower heads covered with mesh bags (preventing visitation by bees); “nectar standing crop” data were taken from open (unbagged) flower heads to which all bees could gain access. We censused bees at C. solstitialis during comparable periods on both islands and determined the bee guild composition of the plant on Lesvos. Significant differences in nectar levels occurred between bagged and unbagged florets at each locale, especially during the period that pollinators were most common. Nectar flow and nectar standing crop volumes were lower on Lesvos than on Santa Cruz Island. The bee guild diversity at Lesvos was higher relative to Santa Cruz Island. Surprisingly, however, honey bees were not recorded during our monitoring periods on Lesvos.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.