5.8 Fishing

Beschreibung

Issues associated with fishing
tchp
Mindmap von tchp, aktualisiert more than 1 year ago
tchp
Erstellt von tchp vor fast 10 Jahre
26
0

Zusammenfassung der Ressource

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

                                      Anmerkungen:

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

                                        Anmerkungen:

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

                                      ähnlicher Inhalt

                                      B2 quiz
                                      10lw8141
                                      B4 living and growing
                                      03howellc
                                      B2 Quiz
                                      10lw8160
                                      session 1 Starter activity
                                      Nicola Pratt
                                      Das grosse Einmaleins
                                      JohannesK
                                      Grundlagen der Online-Zusammenarbeit
                                      Dozent
                                      1.2 Die Entwicklung der modernen Psychologie
                                      achdrewes
                                      PuKW - GESKO WERB
                                      Salome Jeong
                                      Vetie - Innere Medizin 2012
                                      Fioras Hu
                                      Vetie Para Morphologie Helminthen
                                      Kristin E
                                      Vetie Para Morphologie
                                      Kristin E