Figure 1.

Hibernation survival for experimental queens from each maternal colony. The probability of surviving differed significantly between maternal colonies (P < 0.0001). Sample size within each maternal colony ranged from 8 to 40 and error bars show 95% shortest unbiased confidence limits.

Whitehorn et al. BMC Evolutionary Biology 2009 9:152   doi:10.1186/1471-2148-9-152
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