In case of over fishing of a company government might take decision of cancelling the permit of the company.
Step-by-step explanation:
Major fishing companies are concentrated in the major fish producing zones of the oceans. Fish producing zones are developed in the area of having abundance of plankton. Plankton is the basic food of fish. So, plankton prone areas are rich fish producing zone.
In the area near to Japan or other island of South-east Asia over Pacific ocean is largest fish producing areas and major fishing companies are concentrated there. But there should be a limit so that no companies run in loss. Therefore, if any company show abundance in fishing their fishing permit will be liable to cancel by the government.