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Author Topic: When do bees die from cold?  (Read 5460 times)

Offline bullship

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Re: When do bees die from cold?
« Reply #20 on: January 27, 2011, 10:39:45 PM »
Fellow Beeks;
Don't believe everything you read on the internet. Use your EYES or personally talk to someone who has been there!
Any fool can post ideas on the internet. Get your feet wet or find someone who has.Finsky, Bjorn Michael and others on here have been there,__listen then think then decide course to follow
Bullship:
Bullship

Offline Finski

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Re: When do bees die from cold?
« Reply #21 on: January 28, 2011, 10:48:03 AM »
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http://jeb.biologists.org/cgi/content/full/206/2/353

Biggest number of  heat producing bees are in the centre of cluster

the oxygen consumption of winter clusters increases as the ambient temperature decreases.
The increase is moderate between approximately +10°C and -5°C and is steep below approximately -5°C to -10°C.
In swarm clusters, the steep increase has already started at +10°C
Oxygen consumption also increases with decreasing cluster size
the frequency and intensity of endothermic heat production have to be assumed to increase with decreasing ambient temperature and cluster size.
On the other hand, we suggest that at higher ambient temperatures large (swarm) clusters that have come to rest (e.g. at night) may be able to largely reduce endothermy

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