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Researching What's Inside Honey Bees Could Help Save Them

The way honey bee keepers are raising their hives likely isn't contributing to a decline in honey bee populations. That's according to a new study authored in part by Indiana University researchers.

To find out what's inside a healthy honey bee, Indiana University assistant professor of biology and study co-author Irene Newton, alongside researchers at Wellesley College and North Carolina State University, looked at bees' gut bacteria - called a microbiome.

"These bacteria are thought to provide nutritional advantages to the bee, so that they might be able to allow the bee to break down certain complex carbohydrates in their diets," Newton says. "They might protect against pathogens."

Many mammals acquire their microbiomes maternally, but bees do the exact opposite.

Newton says worker bees typically develop their gut bacteria through interaction with the hive, but queen bees instead acquire theirs through something called royal jelly, a substance made by the worker bees.

That means the bacteria in worker bees and queen bees are totally different, so when beekeepers move queen bees from one hive to another as a means of improving honey quality, that doesn't harm the queens or the colony.

Newton says that's especially good news because many colonies have shrunk by as much as 40 percent over recent winters.

The exact cause for the decline is not known, but some beekeepers blame pesticides from nearby farms.

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