Figure 7: Female association times near resident males and males from an alien population. (a) Times females from the Río Oxolotán population (RO, green square) and the El Azufre (EA, red square) spent near animated resident males or a cave-adapted male (CA-II, white square). (b) Time CA-V (grey square) females spent near resident males or males from the El Azufre (EA) when tested in the cave using infrared techniques. Different letters indicate significant differences in paired samples -tests.