Fig. 3From: Age, sex, and mating status discrimination in the sand fly Lutzomyia longipalpis using near infra-red spectroscopy (NIRS)Spectra of non-copulated Lutzomyia longipalpis females at different ages (absorbance vs. wavelength—nm) after smoothing and first derivative pretreatment by Savitzky-Golay filter. a One (1, 8, and 15 days old; b < 8 or ≥ 8 days oldBack to article page