Table of Contents: September 2012

Pollinating bees must typically visit a large number of flowers before they can return to their nest with a filled honey-stomach. They are thus faced with a challenge equivalent to the familiar “Travelling Salesman Problem”—to link multiple locations with an efficient route that minimizes travel distance. Here, bees' strategies in route optimization are quantified by tracking individuals over long distances with harmonic radar. It turns out that bees initially follow tortuous paths while exploring their environment for new food locations, but rapidly discover food sources and link them with an optimal circuit, using a simple trial-and-error algorithm. See Lihoreau et al. (e1001392) in this issue.

Image Credit: Andrew Martin

Unsolved Mystery

Revisiting an Old Riddle: What Determines Genetic Diversity Levels within Species?

Ellen M. Leffler, Kevin Bullaughey, Daniel R. Matute, Wynn K. Meyer, Laure Ségurel, Aarti Venkat, Peter Andolfatto, Molly Przeworski

Community Page

Addressing HIV/AIDS in South African Classrooms

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Research Articles

Radar Tracking and Motion-Sensitive Cameras on Flowers Reveal the Development of Pollinator Multi-Destination Routes over Large Spatial Scales

Mathieu Lihoreau, Nigel E. Raine, Andrew M. Reynolds, Ralph J. Stelzer, Ka S. Lim, Alan D. Smith, Juliet L. Osborne, Lars Chittka

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