fishing
fishingFish populations of the Mediterranean are less abundant than those of the oceans. Gradients of temperature and salinity resulting from the depth and the closure of the ecosystem, however, promote the life cycle of several important species on the continental shelves (but see food and drink). The migratory habits of many important species bring them into contact with many Mediterranean islands and coastlands.
Since the routes of the shoals are far from predictable, places where their movements are topographically constrained (such as straits like Messina, the Bosporus, or Hellespont, or lagoons and their entries) are of obvious importance. Numbers are very variable from year to year: gluts occur, but dearth is so frequent as to make it unwise to make fish protein more than a supplement (if a locally and occasionally important one) to a subsistence diet. The nutritional usefulness is greatly...
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