Differences in Tolerance to Host Cactus Alkaloids in Drosophila koepferae and D. buzzatii
Figure 1
Performance as a function of concentration.
Mean relative performance (and 95 % confidence intervals) as a function of concentration for a) D. buzzatii and b) D. koepferae reared in medium with the alkaloid fraction (black symbols) or the non-alkaloid fraction (white symbols) extracted from the columnar cactus T. terschekii. Linear trends are shown.