The Somalis raise cattle, sheep, and goats, but the camel plays the central role as an indicator of wealth and success. Camels can survive in an environment where water and grazing areas are scarce and widely scattered. They provide meat, milk, and transportation for Somali pastoralists, and serve as their principal medium of exchange. Camels are provided as compensation for homicides and are a standard component of the dowry package.
For centuries, nomads have relied on their livestock for subsistence and luxuries. They have sold cows, goats, and older camels to international traders and butchers in the coastal cities, and in the urban markets have bought tea, coffee beans, and salt. In the nineteenth century, northern Somalis were quick to take advantage of the market for goats with middlemen representing the British, who needed meat for their enclave in Aden, a coaling station for ships traveling through the Suez Canal. By the turn of the century, about 1,000 cattle and 80,000 sheep and goats were being exported annually from Berbera to Aden.
Starting in the fifteenth century, the ports of Saylac and Berbera were well integrated into the international Arab economy, with weapons, slaves, hides, skins, gums, ghee (a type of butter), ostrich feathers, and ivory being traded. On the Banaadir coast, especially in Mogadishu but also in Merca and Baraawe, a lively trade with China, India, and Arabia existed as early as the fourteenth century. Finally, starting with the Somalis who for centuries have joined the crews of oceangoing ships, the exportation of labor has long been a crucial element in Somalia's ability to sustain itself.