“…The best results for the bonito samples and the combined bonito and tuna samples were obtained with model M2, achieving R v 2 of 0.722 and 0.786, respectively. As expected, the best predictive capabilities were obtained for the M2 model, since it is based on spectral regions containing vibrational modes of medium and strong intensity of the histamine molecule, i.e., the 1255-1324 cm −1 and 1480-1570 cm −1 regions, as previously reported [22,36,39,41]. Less acceptable predictive capabilities are determined for the M3 and M4 models based on a fewer individual strong vibrational bands of the histamine molecule, indicating that weaker vibrational bands present in a broader spectral range contain information that contributes significantly to the overall quality of the PLSR model.…”