Fig. 4From: Age, sex, and mating status discrimination in the sand fly Lutzomyia longipalpis using near infra-red spectroscopy (NIRS)Spectra of non-copulated Lutzomyia longipalpis males at different ages (absorbance vs. wavelength, nm) after smoothing and first derivative pretreatment by Savitzky-Golay filter. a 1, 3, 8, 10, 15, and 17 days old; b 1, 8, and 15 days old; c < 8 or ≥ 8 days oldBack to article page