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Parasite Drives Honey Bees to Doomed Zombie Flight?

Parasite Drives Honey Bees to Doomed Zombie Flight?

 

Parasitic flies that take over the bodies of honeybees may at last provide another clue into why honey bee colonies have been collapsing at an alarming rate.

Since 2007 hives across the US have been deserted by bees who have gone missing without an apparent cause, decimating colonies across the country. A combination of factors had been blamed for the decline in numbers, ranging from†parasitic†mites to the effects of pesticides.

However, new findings published in Plos One show a more gruesome threat to bee numbers: the discovery that honey bees may be falling prey to a paristic fly that causes the bees to fly around in the night before killing them, with the offspring of the fly eventually emerging from the remains of the honey bee.

From New Scientist:

John Hafernik of San Francisco State University in California and colleagues discovered that hosting†Apocephalus borealis, a parasitic fly found throughout North America, makes bees fly around in a disoriented way at night, when they normally roost in the hive, before killing them.

Although unlikely to be the sole cause of colony collapse disorder, Hafernik thinks the parasitic fly discovery may help explain why bees quit their hives. “They seem to leave their hives in the middle of the night on what we call the ‘flight of the living dead’,” he says.

More from the study’s abstract:

Honey bee colonies are subject to numerous pathogens and parasites. Interaction among multiple pathogens and parasites is the proposed cause for Colony Collapse Disorder (CCD), a syndrome characterized by worker bees abandoning their hive. Here we provide the first documentation that the phorid fly†Apocephalus borealis, previously known to parasitize bumble bees, also infects and eventually kills honey bees and may pose an emerging threat to North American apiculture. Parasitized honey bees show hive abandonment behavior, leaving their hives at night and dying shortly thereafter. On average, seven days later up to 13 phorid larvae emerge from each dead bee and pupate away from the bee.

The parasitic flies have now been found at 77% of sites in the San Francisco Bay area and their presence has been detected in hives in South Dakota and†California’s Central Valley.

The team will now investigate if the so-called “zombie” flights the bees have been forced to undertake are because the parasite affects the bee’s “clock” genes that govern when the bees are active. An alternative theory is that the bees may be ejected from the colony by other bees in order to save the hive from further infection.

As mentioned above, the parasite is unlikely to be the sole cause of declining honey bee numbers but this new finding may provide a clue that can eventually lead scientists to a solution on how to help honey bee populations recover.

Read more about the study here.

Related Reading:
Zombie Virus Drives Caterpillars To An Explosive Death
Are You Prepared for the Zombie Apocalypse?
Gentle Goose Rescued & Returned to Pond: Witnesses Canít Believe Their Eyes

 

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Image used under the Creative Commons Attribution License, with thanks to Cygnus912.

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109 comments

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4:01PM PST on Feb 20, 2013

Thank you for sharing.

1:10PM PDT on Jun 10, 2012

weird

5:08PM PDT on May 23, 2012

pretty creepy parasites

10:32AM PST on Jan 19, 2012

OW. I donlt like to get stung but we loose our bees we really are looking at a food shortage of BIBLICAL PROPORtIONS!

9:32PM PST on Jan 18, 2012

The real question is where did these parasitic flies come from in the first place? Are they a new mutant evolution caused by all the free-radicals in greenhouse gases or the chaotic climate change (for all of which humans are responsible). Nothing wrong with having a healthy fear of bees and maybe just avoiding them, but more important is understanding how vital they have been to our ecosystem. Just a couple of examples are abundances of flowers in nature and nutritious, useful honey exist because of honey bees. Scientist have studied the intricate and fascinating social behaviors of bees for a long time and still do not have them completely figured out. It's heartbreaking to lose such a handy species. I think they are my favorite insect (I'm not exactly fond of insects), but I would never try to pet one or anything. ;-)

2:34PM PST on Jan 18, 2012

I hope scientists can soon find out what's hurting these bees!

2:32PM PST on Jan 18, 2012

What a pity, poor things. I love honey. But in taking it away we cause alarm in the hive so I would also fight back if I thought someone was going to damage my home, take my food or hurt my children.

10:38AM PST on Jan 17, 2012

This is terrible news for one of nature's most important pollinators.

7:05AM PST on Jan 17, 2012

I hate bees. They freak me out.

1:49AM PST on Jan 17, 2012

Please God we can save the honey bees - and the rest of our world!

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