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Social benefits require a community: the influence of colony size on behavioral immunity in honey bees
Bernhard:

Thank you for posting this article, and I apologize for the delayed reply as I just now had the opportunity to read it.

Two things from the article stuck out to me:

1. Meunier's definition of social immunity: any collective or individual mechanism that has emerged and/or is maintained at least partly due to the anti-parasite defense it provides to other group members.

Suggesting further support for genetic diversity within a colony contributing to overall survival.

2. Optimal colony size: The author references a 1985 Harbo study that suggests that the optimal colony size is 9,000 bees, which is quite small indeed.
 
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