The distribution of the hives' production is best described as skewed (or uniform, normal, etc., depending on the actual shape of the histogram). So, the median is a more appropriate measure of center than the mean.
The specific terms to fill in would depend on the characteristics of the histogram, such as whether it is skewed to the right or left, or if it is uniform or normal. If you have any specific details about the histogram's shape, please share for more tailored feedback.