In the West African nations of Guinea-Bissau, Senegal and Mauritania, fishing was historically central to the economy. Beginning in 1979, the European Union began negotiating contracts with governments for fisheries off the coast of West Africa. Commercial, unsustainable, over-fishing by foreign fleets played a significant role in large-scale unemployment and migration of people across the region.  This violates the United Nations Convention on the Law of the Seas , which recognizes the importance of fishing to local communities and insists that government fishing agreements with foreign companies should target only surplus stocks. 
Just as colonization had some beneficial effects, it acted contradictory as well for the country. The major disadvantaged effect was the misuse of slavery in Africa. The Africans were made to work as slaves, which had existed earlier as well but had increased tremendously during colonization or were forced to work without pay as they became weaker sections of the society. Sizeable colonies were acquired by the Europeans and they ruled independently dragging Africans to weaker side in their home country. Many Africans were killed during the process of acquiring. Europeans also seized land for plantations and made the Africans work for them on insignificant pay. The African culture suffered drastically as a result of colonization. It underwent dilution with the European culture and the African tradition religion was destroyed with the introduction of Christianity into the country. Infact, the Europeans inferred it as their responsibility to spread Christianity in most parts of the world, ignoring the brutal acts of killing or acquiring others’ lands involved in it. Most resources were taken away from the country leaving it economically weak and the Africans could never live the opportunity to utilize and develop their own resources. This included gold, diamonds, ivory and agriculture primary products. The most detrimental effect of African colonization was their position in the administration and Government. Africans were seated only on inferior positions in the colonial administration and Government. This concluded their loss of sovereignty. Various functions of Government such as making laws, issuing currency, negotiating treaties, waging war and administering justice , all fell in the hands of the Europeans and the Africans were made mere spectators. It also led to social inequality amongst Africans as the people in the government considered themselves superior to others. The Africans never got an opportunity to have a say in their own country’s decision making and development.