Bees are explosively ejaculating to death during heat waves (PHOTOS)

Feb 22 2022, 8:30 pm

What’s black and yellow and ejaculates until it dies during heat waves? Male bees, it turns out, and scientists ā€” disturbed as they may be ā€” have a solution.

When the males get too hot, they convulse until they explosively ejaculate to death, and a phallus the size of their abdomen bursts from their lifeless body.

Yes, it is disgusting and upsetting.

But we can fix it, UBC experts say.

A dead drone

Submitted/Emily Huxter

One solution is to keep the hives cool during extreme heat, perhaps by using a polystyrene cover. Dr. Alison McAfee and Emily Huxter conducted the research, with Armstrong-based beekeeper Huxter on the ground and McAfee conducting analysis remotely.

McAfee is a post-doctoral fellow at UBC and North Carolina State University. She’s a biochemist who specializes in honeybee fertility.

ā€œWe actually donā€™t know why that happened,ā€ said McAfee, about the drones ejaculating post-mortem.

ā€œWhat we do know is that the sole purpose of the male bees, as far as we understand so far, is to mate with a virgin queen, and they donā€™t really contribute to the hive in other ways. Their only job is to, when theyā€™re sexually mature, fly and find the congregation area where all the other boys go and find the Queen and chase her in mid-air.ā€Ā 

They always die after they mate, but the ejection of a phallus from their abdomen is unusual.

Dr. Alison McAfee stands by a hive

Submitted/Dominique Weiss

ā€œThey actually contain a whole phallus internally, and when they mate, their abdominal muscles contract very strongly. The same thing happens when they die due to stress for reasons that we donā€™t know, and that forces the endo-phallus to appear outside their body,ā€ she explained.Ā 

ā€œThatā€™s sort of a partial version,ā€ she continued, about the protrusion. ā€œThatā€™s actually only half the structure.ā€Ā 

When Huxter reached out to her about the project, McAfee found the drone deaths very concerning.Ā 

Their two-inch polystyrene covers cooled the hives by about four degrees ā€” enough to keep the creatures alive, hopefully.

But McAfee worries the film won’t cool the centre of the hive, where the queen lives. That’s why she wants to give drones syrup as well as polystyrene, so they can carry liquid into the hot, dense core.

The polystyrene alone is probably enough to prevent “at least some colonies” from dying, but it’s likely to only work with the smaller ones that are easier to cool.

Scientists know that about 50% of male bees, or drones, will die after six hours at 42Ā°C. BC got that hot this past summer, leaving a dent in local bee populations, and it could happen again in 2022.

An ejaculated drone

Submitted/UBC Beekeeping

But still, McAfee says why this happened is “a total mystery.” There’s more research to be done, and she intends to carry on with her work alongside Huxter.

Eventually, she plans to look at the temperature in different parts of the colony, instead of gaging the area right under the lid.

ā€œIā€™ve been studying the effects of heat on the survival and fertility of bees for a few years now, and I always thought it was more of an issue for bees that get too hot when theyā€™re being shipped from one province or country to another because itā€™s a very unnatural environment,ā€ said McAfee.

ā€œIt makes me think about other insects as well.ā€Ā 

Bees work in teams to keep each other alive, but solo bugs donā€™t have that protection.

ā€œSeeing the heat very obviously affecting honeybees makes me think itā€™s very likely that wild insects and native species are probably also affected as well, so I think thatā€™s a super important area of future research,ā€ she said.

The experiment has not been peer-reviewed, but several beekeeping experts from UBC have backed its findings.

So the drone deaths are not glamorous. But youā€™ve got to give it to the bees: at least they went out with a bang.

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