Complex sentence: This has led researchers to speculate that "P. rebeli" larvae that did not receive adequate food can still also fully develop in one year and act as a functioning adult, however, they are unlikely to be bivoltine (producing two broods in one season).
Split into simpler sentences: This has led researchers to speculate that P. rebeli larvae that do not receive adequate food can still fully develop in one year and act as a functioning adult. However, they are unlikely to be bivoltine (producing two broods in one season).