5.8 Fishing

tchp
Mind Map by tchp, updated more than 1 year ago
tchp
Created by tchp over 6 years ago
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Issues associated with fishing

Resource summary

5.8 Fishing
  1. Fish farming
    1. Growing fish in enclosures
      1. Estuaries
        1. Lakes
          1. Ponds
            1. Reduces predation
              1. Add fertilisers to encourage growth of plankton for food
                1. Can lead to eutrophication
              2. Diseases can spread easily
                1. Huge amount of antibiotics used
                  1. Farmed fish may escape, breed with wild fish and weaken them
                  2. Fish contain high amounts of dioxins and PCBs
                  3. Commercial Fishing
                    1. Overfishing
                      1. Reduced fish stocks
                        1. Damages livelihoods of fishermen
                          1. Knock on effects to food chains
                            1. Fish quotas
                              1. Restrict mesh size in nets
                                1. International agreements
                                  1. Closed seasons
                                    1. Exclusion zones
                                    2. Drift nets

                                      Annotations:

                                      • Suspending a net between two boats so fish swim into it.
                                      1. Trawling

                                        Annotations:

                                        • Dragging a large net behind a boat, catching whatever is in the way.
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