Final answer:
Investigating and assessing every overharvest is important to ensure the sustainability of the fishery, protect the species' populations, and prevent their extinction.
Step-by-step explanation:
Overharvesting is a serious threat to many species, particularly aquatic species. Common resources are subject to an economic pressure known as the tragedy of the commons, in which fishers have little motivation to exercise restraint in harvesting a fishery when they do not own it. Investigating and assessing every overharvest is important to ensure the sustainability of the fishery, protect the species' populations, and prevent their extinction.