Results 151 to 160 of about 78,130 (182)
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Long-term ecology of euglossine orchid-bees (Apidae: Euglossini) in Panama
Oecologia, 1987Abundance patterns during 6-7 years and orchid visitation were determined for 51 species of the 57 local euglossine bees. Male bees were counted at 3 chemical attractants presented in the same manner each month. Sites were separated by 75 km but included wet Atlantic forest at 500 m elevation, moist forest at 180 m near Barro Colorado Island, and cloud
D W Roubik
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Diploid Male Frequencies in Colombian Populations of Euglossine Bees
Biotropica, 2007ABSTRACTSome studies have recently reported high diploid male frequencies in euglossine bees indicating possible population declines. We estimated the genetic variability and frequency of males that are diploid in five Colombian species of euglossine bees using allozyme markers. Expected heterozygosities ranged from 0.10 to 0.23.
Margarita M. López‐Uribe +2 more
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Euglossine Bees as Long-Distance Pollinators of Tropical Plants
Science, 1971Euglossine bees may return to a nest from as far away as 23 kilometers in a tropical rain forest. These bees apparently forage long distances and visit the same plants repeatedly along a feeding route. They probably promote outcrossing among tropical plants with low population density; therefore, they may permit the existence of plant species whose ...
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Ultrastructural characterization of spermatozoa in euglossine bees (Hymenoptera, Apidae, Apinae)
Insectes Sociaux, 2005Euglossine spermatozoa are the longest described to date for the Hymenoptera. This cell includes a head and a flagellar region. In transverse sections, the acrosome is circular at the tip but has an oval contour along most of its length. The perforatorium penetrates into a deep cavity in the nuclear tip.
U. Zama +4 more
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Dispersal of euglossine bees between fragments of the Brazilian Atlantic Forest
Journal of Tropical Ecology, 2003The Brazilian Atlantic Forest is one of the world's ‘hot spots’ for conservation because of its high level of endemism and number of endangered species (Myers et al. 2000). After centuries of deforestation, most of the remaining Atlantic Forest is scattered as small fragments on private land (Fonseca 1985, Jorge & Garcia 1997). Pollination could be
Athayde Tonhasca Jr. +2 more
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The effects of forest fragmentation on euglossine bee communities (Hymenoptera: Apidae: Euglossini)
Biological Conservation, 2009Abstract Despite scientific and media attention on pollinator declines, there is still only a rudimentary understanding of the response of bees—the most important group of pollinators worldwide—to ongoing land use changes. Euglossine bees are an ecologically important Neotropical clade of forest-dependent pollinators.
Berry J. Brosi
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Male Eufriesia purpurata, a DDT-collecting euglossine bee in Brazil
Nature, 1982While studying the ecology of the malaria vector Anopheles (Nyssorhynchus) darlingi Root along the Ituxi River, Amazonas, Brazil, we observed aggregates of bees on the walls of houses that were routinely sprayed with DDT. Several bees collected from DDT-treated house walls in August 1978 were identified as male specimens of Eufriesia purpurata (Moscary)
Donald R. Roberts +4 more
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Population Dynamics of Male Euglossine Bees in Amazonian Forest Fragments
Biotropica, 1987At sites near Manaus, Amazonas, Brazil we measured the impact of forest fragmentation on populations of male euglossine bees. The visitation rates of 15 species of male euglossine bees to three chemical attractants were determined for continuous forest; isolated 1, 10, and 100 ha forest fragments; and a cleared area.
A. Harriett Powell, George V. N. Powell
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Motor patterns of male euglossine bees evoked by floral fragrances
Animal Behaviour, 1971Abstract During pollination of certain orchids, tropical euglossine bees collect fragrant chemical substances from the flower with forelegs, transfer it to the midlegs, and finally to a cavity in the hindleg tibia, as indicated by motion picture analysis. The activities of Eulaema cingulata, E.
William H. Evoy, Brooks P. Jones
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Journal of Chemical Ecology, 1989
MaleEulaema cingulata (Fabricius) (Apidae: Euglossini) possess large cephalic labial glands that secrete a mixture of lipids. In the process of fragrance collection, males secrete the labial gland lipids onto the substrate. The mixture of lipids and fragrances is then taken up by the front tarsal brushes and transferred to the hind tibial organs.
W M, Whitten, A M, Young, N H, Williams
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MaleEulaema cingulata (Fabricius) (Apidae: Euglossini) possess large cephalic labial glands that secrete a mixture of lipids. In the process of fragrance collection, males secrete the labial gland lipids onto the substrate. The mixture of lipids and fragrances is then taken up by the front tarsal brushes and transferred to the hind tibial organs.
W M, Whitten, A M, Young, N H, Williams
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