منابع مشابه
Orchid bees
protozoa, such as those that cause sleeping sickness, leishmaniasis, and even malaria, predominantly reproduce clonally, which is, of course, of considerable medical significance. In May 1991, Tibayrenc returned to my lab, now at UC Irvine, for 14 months of additional research. We have continued collaborating to the present. Are science and religion compatible? Evolution and religious beliefs n...
متن کاملSuction feeding in orchid bees (Apidae: Euglossini).
Energy flux during nectar feeding is maximized at an intermediate sugar concentration, the value of which depends on the morphology of the feeding apparatus and the modality of fluid feeding. Biomechanical models predict that a shift from capillary-based lapping to suction feeding will lead to a decrease in this optimal sugar concentration. Here, I demonstrate that the four major genera of orch...
متن کاملMacroevolution of perfume signalling in orchid bees.
Theory predicts that both stabilising selection and diversifying selection jointly contribute to the evolution of sexual signalling traits by (1) maintaining the integrity of communication signals within species and (2) promoting the diversification of traits among lineages. However, for many important signalling traits, little is known about whether these dynamics translate into predictable ma...
متن کاملScaling of nectar foraging in orchid bees.
Morphology influences the rate at which foraging bees visit nectar flowers, the quantity of nectar they must consume to fuel their activities, and, consequently, the profitability of flower species. Because feeding time is a major determinant of visitation rate, I used a biomechanical model to examine how energy intake rate (E) varies with sucrose concentration, body mass (M), and proboscis len...
متن کاملOrchid bees don't need orchids: evidence from the naturalization of an orchid bee in Florida.
Almost 200 species of orchid bees are the exclusive pollinators of nearly 700 specialized orchids in the neotropics. This well-known mutualism involves orchids, called perfume orchids, which produce species-specific blends of floral fragrances, and male orchid bees, which collect and use these fragrance compounds during their courtship. We report here the naturalization of an orchid bee, Euglos...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2009
ISSN: 0960-9822
DOI: 10.1016/j.cub.2009.09.029