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Why are continental shelves important fishing grounds in the Atlantic Ocean?
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commercial fishing
Worker in the Tsukiji fish market, Tokyo.
Continental shelves are vital fishing grounds in the Atlantic Ocean primarily because they are highly productive environments that support a vast array of marine life. Nearly all of the Atlantic fish catch is harvested from these relatively shallow, submerged terraces.12
The productivity of these areas is driven by several key factors:
- Nutrient Availability: Continental shelves often experience coastal upwelling, a process where cold, nutrient-rich deep water is brought to the surface. These nutrients trigger rapid reproduction of phytoplankton, which serve as the foundation of the marine food web.134
- Biological Abundance: The resulting plankton blooms provide abundant food supplies for zooplankton and various fish species, making these regions ideal for both demersal (bottom-dwelling) and pelagic (free-swimming) populations.134
- Habitat Diversity: The shelves feature varied topography, including ridges, troughs, and coastal margins, which provide diverse habitats for commercial species such as cod, haddock, herring, and various shellfish.135
Because these regions are so productive, they have historically been the most heavily utilized fishing grounds in the Atlantic, though many stocks now face significant pressure from overfishing.1