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Geography Optional 300+ Score Pack · Model answer

Analyse the reasons for a comparatively poorer development of fishing grounds in tropical areas.

  • UPSC 2013
  • Economic Geography

A fishing ground is a shelf area where continuous nutrient renewal sustains dense plankton and thus harvestable single-species stocks; the great grounds — Grand Banks, Dogger Bank, Hokkaido — lie in cool temperate latitudes, 40°–60°.

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What the full answer covers

  • Oceanographic Cause: The Permanent Thermocline
  • Biological Cause: Diversity Without Biomass
  • Human-Economic Cause
  • The Upwelling Exception That Confirms the Mechanism

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