Para. 4 When Canada took similar measures to protect the supply of herring in the 1970s, the fish eventually recovered. But experts say that some species today have been so wasted, they may never recover. The government also faces protests from Canadian fishermen. About 40.000 are now unemployed as a result of the fishing bans and loss of their fish supplyPara.4 When Canada took similar measures to protect the supply of herring in the 1970s, the fish eventually recovered. But experts say that some species today have been so wasted, they may never recover. The government also faces protests from Canadian fishermen. About 40,000 are now unemployed as a result of the fishing bans and loss of their fish supply