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The influence of task on brain Kr-h1 levels. We collected nurses and foragers from self-supported free-flying colonies. Brain Kr-h1 transcript levels were similar in foragers and nurses from Colony A but higher in nurses in colonies B and C. Data represent mean ± standard error of the mean. The number of individual brains used in each sample is shown in the base of each bar. P-values above plots were obtained from unpaired t-test analyses.
