9 research outputs found
Co-dependency between a specialist Andrena bee and its death camas host, Toxicoscordion paniculatum
No full textNectar production of Epilobium angustifolium L. at different air humidities; nectar sugar in individual flowers and the optimal foraging theory
No full textEnzyme activity, amino acid profiles and hydroxymethylfurfural content in Ethiopian monofloral honey
No full textPollen grain morphology is not exclusively responsible for pollen collectability in bumble bees
No full textDiel nectar secretion rhythm in squash (Cucurbita pepo) and its relation with pollinator activity
No full textMost studies of foraging behavior in bees have been performed under artificial conditions. One highly neglected area is the daily nectar secretion rhythm in flowers including how nectar properties may vary with time of day. As a first step in understanding the connections between forager behavior and nectar presentation under more natural conditions, we examined nectar secretion patterns in flowers of the squash Cucurbita pepo. Under greenhouse conditions, squash flowers exhibit consistent diel changes in nectar volume and concentration through anthesis. These temporal patterns are robust, persisting under field conditions as well as simulated drought conditions in the greenhouse. In the presence of active pollinators, diel patterns are evident but with highly variable, severely reduced volumes. The potential consequences of these factors for pollinator behavior are discussed
