Thursday, May 27, 2010

Radio transmitters

Tiny transmitters glued to the backs of tropical bees have allowed scientists to track the exotic insects as they fly for miles in search of rare flowers.

Some of the iridescent blue-green orchid bees were found to buzz tirelessly for surprisingly long distances.

One even crossed the shipping lanes of the Panama Canal, a journey of at least five kilometres.

Scientists glued tiny transmitters glued to the backs of tropical bees in order to track them as they fly for miles in search of rare flowers

Scientists glued tiny transmitters glued to the backs of tropical bees in order to track them as they fly for miles in search of rare flowers

The study has given researchers new insights into the role of bees in tropical forest ecosystems.

Working in Panama, scientists trapped 17 orchid bees of the common species Exaerete frontalis and attached a 300 milligram radio beacon onto the back of each.

The signals they transmitted were used to track their movements in and around the dense forest where they lived.

Professor Martin Wikelski, from Princeton University, US, and the Max Planck Institute for Ornithology in Germany, said: 'By following the radio signals, we discovered that male orchid bees spent most of their time in small core areas, but could take off and visit areas farther away.

'One male even crossed over the shipping lanes in the Panama Canal, flying at least five kilometres, and returned a few days later.'

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