... Rb in a model insect, the rhinoceros beetle Xylotrupes gideon , fed a diet of plum jam or plum jam enriched with K + or Rb + . The turnover of 86 Rb in the beetles on the K + and the Rb + diets was higher than that for beetles on the jam diet ( F 2,311 =32.4; P =1.58×10 −13 ). We also exposed...