Complex sentence: Although the traps can be used for research and the moths can be released after capture, traps like these have been suggested as a means of population control, though one study found that the reduction in population was not strong enough to significantly impact population size.
Split into simpler sentences: Although the traps can be used for research and the moths can be released after capture, traps like these have been suggested as a means of population control. However, one study found that the reduction in population was not strong enough to significantly impact population size.