Affiliation:
1. Department of Cell and Organism Biology, Helgonavägen 3, Lund University, S-223 62, Lund, Sweden
2. Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancon,Republic of Panama
Abstract
SUMMARYThe sweat bee Megalopta (Hymenoptera: Halictidae), unlike most bees, flies in extremely dim light. And although nocturnal insects are often equipped with superposition eyes, which greatly enhance light capture, Megalopta performs visually guided flight with apposition eyes. We examined how light limits Megalopta's flight behavior by measuring flight times and corresponding light levels and comparing them with flight trajectories upon return to the nest. We found the average time to land increased in dim light, an effect due not to slow approaches, but to circuitous approaches. Some landings, however, were quite fast even in the dark. To explain this, we examined the flight trajectories and found that in dim light, landings became increasingly error prone and erratic, consistent with repeated landing attempts. These data agree well with the premise that Megalopta uses visual summation, sacrificing acuity in order to see and fly at the very dimmest light intensities that its visual system allows.
Publisher
The Company of Biologists
Subject
Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics
Reference49 articles.
1. Baerends, G. P. (1941). Fortpflanzungsverhalten und Orientierung der Grabwespe, Ammophila campestris, Jur. Tijdschr. Entomol.84,81-275.
2. Burton, G. J. and Moorhead, I. R. (1987). Color and spatial structure in natural scenes. Appl. Opt.26,157-170.
3. Cameron, S. and Whitfield, J. B. (1996). Use of walking trails by bees. Nature379, 125.
4. Cartwright, B. A. and Collett, T. S. (1979). How honey-bees know their distance from a near-by visual landmark. J. Exp. Biol.82,367-372.
5. Cartwright, B. A. and Collett, T. S. (1983). Landmark learning in bees: experiments and models. J. Comp. Physiol.151,521-543.
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