Question

Why fish are less important in tropical zone?

Answer 1

1. Low Nutrient Content: Tropical waters are typically warm and lack the upwelling of cold, nutrient-rich waters found in temperate zones. This limits the growth of plankton, which is the base of the marine food chain.
2. Low Plankton Density: With fewer nutrients, there’s less plankton, leading to lower fish populations and reduced fish productivity.
3. Coral Reefs over Open Waters: While coral reefs in the tropics support some biodiversity, they cover small areas and cannot support large-scale commercial fishing like the open, nutrient-rich waters in temperate zones.
4. High Temperature Effects: High water temperatures reduce dissolved oxygen levels, which can limit fish metabolism and population density.