Phase-Dependent Color Polyphenism in Field Populations of Red Locust Nymphs
(Nomadacris septemfasciata Serv.) in Madagascar
Figure 4
Result, in terms of the first two factorial axes, of the multiple correspondence analysis carried out on the table []. Ellipses surround variables characteristic of the solitary, solitaro-transiens/transiens, and gregarious populations. The brown individuals, from dubious status, isolate themselves on axis 3. Codification of the variables (red dots): (1) variables related to the black pigmentation (0, 1 or 2 according to the melanisation intensity): compound eye (E), cephalic capsule (H), median carina of pronotum (CP), wings rudiments (W); lateral black spot of pronotum (LP), black spot on hind femur (F); (2) variables related to the general color of the tegument (V, green; B, brown; O, orange; J, yellow): cephalic capsule (GC) and pronotum (GP). Variables introduced into the MCA as additional elements: D1 to D5, density of the hopper population (, D2 = [10–30], D3 = [30–70], D4 = [70–100], ) (orange squares); L1 to L6, hopper instars (green squares).
