Istanbul in the 1970s, as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis. This sudden, sharp rise in the city's population caused a large demand for housing, and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul. Istanbul is located in north-western Turkey within the Marmara Region on a total area of . The Bosphorus, which connects the Sea of Marmara to the Black Sea, divides the city into a European, Thracian side—comprising the historic and economic centers—and an
Marine life of the Strait of Messina ("Sarda sarda"), the Mediterranean Spearfish ("Tetrapturus belone") and the Swordfish ("Xiphias gladius"). The fish of the Strait are captured with boats called feluche or small engine powered fishing boats called "passerelle". These pelagic fish are assets unique to this part of the Mediterranean Sea. Only in the Strait, using various techniques, it is possible to capture Tuna throughout the year and in all age classes (from juveniles to adults) as the population moves between the Tyrrhenian and the Ionian Seas. The Strait of Messina is also an established route for the migration of Cetacea, and it is probably the most