Reproductive Interference and Niche Partitioning in Aphidophagous Insects

Figure 4

(a) Natural distribution of H. yedoensis (red solid line) and H. axyridis (blue dotted line) around the Japanese archipelago (modified from Sasaji [24]). The two species are sympatric in central Japan (Honshu), whereas only H. yedoensis is found in the Ryukyu Islands and only H. axyridis in Hokkaido. (b) Harmonia yedoensis on a lead tree, Leucaena leucocephala, on Miyako Island, southern Ryukyus. In areas where H. axyridis does not occur, H. yedoensis adopts a generalist strategy.

(a)

(b)