Bombus impatiens
Pollination potential of male bumble bees ( Bombus impatiens ): movement patterns and pollen-transfer efficiency
... We obtained individual adult males and two Bombus impatiens colonies from Biobest Canada (Leamington, ON, Canada). We attached each colony box to a flight cage (2.2 x 2.2 x 2.4 m) using a gated screen tube ...
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The behaviour of Bombus impatiens (Apidae, Bombini) on tomato ( Lycopersicon esculentum Mill., Solanaceae) flowers: pollination and reward perception
... ( Bombus impatiens ) to tomato flowers ( Lycopersicon esculentum ) and two variables related to the quality of the resulting fruits (weight, number of seeds), as well as the relationship between foragers’ ...
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The effect of the dispersion of rewarding and rewardless flowers on visitation and constancy by bumblebees ( Bombus impatiens )
... We observed the effect of the dispersion of rewarding and rewardless artificial flowers on the foraging behaviour of bumblebees (Bombus impatiens). The two flower “species” differed in colour so that bees ...
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Critical thermal limits of bumblebees (Bombus impatiens) are marked by stereotypical behaviors and are unchanged by acclimation, age or feeding status
... were removed from a single nest and placed in separate feeding containers (19×14×9 cm, with fifteen 2 mm air holes) for 12 h at 4°C, or 72 h at each of 15 and 32°C. Pilot experiments demonstrated that bees were unable to ...
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Intraspecific variation in flight metabolic rate in the bumblebee Bombus impatiens: repeatability and functional determinants in workers and drones
... The evolution of flight energetics requires that phenotypes be variable, repeatable and heritable. We studied intraspecific variation in flight energetics in order to assess the repeatability of flight metabolic rate and ...
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The spatial frequency tuning of optic flow dependent behaviors in the bumblebee Bombus impatiens
... Insects use visual estimates of flight speed for a variety of behaviors, including visual navigation, odometry, grazing landings and flight speed control, but the neuronal mechanisms underlying speed detection remain ...
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Limits to vertical force and power production in bumblebees (Hymenoptera: Bombus impatiens)
... Maximum vertical forces produced by flying animals can be difficult to identify unequivocally, but potentially indicate general limits to aerodynamic force and muscle power output. We used two methods (i.e. incremental ...
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Behavioural Flexibility in Bumblebees (Bombus impatiens)
... Panel C shows the significant correlation between latency and time spent pushing on the down task for bees that completed the down task first, and panel D shows the significant relation[r] ...
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Imidacloprid Impairs Performance on a Model Flower Handling Task in Bumblebees (Bombus impatiens)
... While the honey bee is clearly important, its success too often casts a shadow over the importance of the other 16,000 or more bee pollinators (Batra, 1995; Michener, 2007; Smith et al., 2016). Other managed bee species, ...
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Behavioural assessment of visual acuity in bumblebees (Bombus impatiens)
... A bee’s natural environment is rich with visual cues that can be exploited for a number of purposes, including the location and identification of food sources, navigation and mating. On the basis of the evidence ...
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Flight energetics, caste dimorphism and scaling properties in the bumblebee, Bombus impatiens
... B. impatiens queens are larger ...B. impatiens based on a large number of workers shows isometric scaling, and reproductive queen caste is developing in the same ...
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Sensorimotor learning in bumblebees: long term retention and reversal training
... Bees in this group had to learn two tasks, to associate both blue with right turns and yellow with left turns. Subjects were forced to alternate between tasks after each individual trial. Bumblebees (Bombus ...
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Molecular characterization and expression of the UV opsin in bumblebees: three ommatidial subtypes in the retina and a new photoreceptor organ in the lamina
... bumblebee Bombus impatiens as our study ...B. impatiens retina for short-wavelength light has been characterized and shows a single peak most sensitive to 350·nm (Bernard and Stavenga, ...
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Stoichiometry and Infectious Disease: Linking Chemical Elements and Parasitic Interactions.
... (Ephemeroptera: Baetidae), and Rhithrogena hageni (Ephemeroptera: Heptageniidae) are all grazing mayflies found in swift, high elevation streams in the American West (Dodds 1923). In the streams around the Rocky Mountain ...
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Changes in the Status and Distribution of the Yellow-faced Bumble Bee
... species, Bombus caliginosus (Frison) and Bombus vandykei (Frison). Bombus caliginosus has been reported only as far north as the Olympic Peninsula and Okanogan Valley in Washington State (Krombein et ...
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Comparative floral ecology and breeding systems between sympatric populations of Nothoscordum bivalve and Allium stellatum (Amaryllidaceae)
... We collected 157 foraging insects on flowers of A. stellatum. The majority were female beetles and bees. Of the 67 specimens of Chauliognathus pensylvanicus (Cantharidae) collected and measured, 75% were female. These ...
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Impulse Patterns in the Flight Motor Neurones Of Bombus Californicus and Oncopeltus Fasciatus
... Temporal and phasic properties of Bombus motor neurone discharge, a A histogram of the interspike intervals of a left dorso-longitudinal unit recorded during flight, 6 A histogram of the[r] ...
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Temperature Regulation in Bee and Waspmimicking Syrphid Flies
... Thermal conductance Although the thick pile of Bombus mimics is clearly effective as insulation, the cooling rates and body temperature excesses of these mimics are similar to those of g[r] ...
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Do native bees have the potential to promote interspecific pollination in introduced Impatiens species?
... In order for hybridisation to occur between non-native plant species, they must overlap in their flowering phenology, and their pollination mechanisms and breeding systems must allow interspecific pollen transfer. In ...
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Three new species of Impatiens (Balsaminaceae) from Myanmar
... Impatiens L. (Linnaeus 1753: 937), comprising almost the entire family of Balsaminaceae, is a highly diverse genus with more than 1000 species distributed in tropical and subtropical Africa and Eurasia ...
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