Marine Reserves - PowerPoint PPT Presentation

marine reserves n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Marine Reserves PowerPoint Presentation
Download Presentation
Marine Reserves

play fullscreen
1 / 105
Marine Reserves
180 Views
Download Presentation
tender
Download Presentation

Marine Reserves

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Marine Reserves The New Zealand Experience Compiled by Bill Ballantine Leigh Marine Laboratory, University of Auckland

  2. The world centred on NZ

  3. The South West Pacific

  4. The New Zealand Region

  5. Usual Map

  6. Land Habitats

  7. Marine Habitats !

  8. Little Barrier Island – 1st land reserve 1888Leigh – 1st marine reserve 1975

  9. The rules in Marine Reserve1. No fishing - by big boats

  10. or little boats

  11. No fishing by anyone

  12. 2. No constructions

  13. 3. No dumping or filling

  14. 4. No disturbances

  15. Marine reserves are pieces of the sea that are left undisturbed so that - • They continue in their natural state • Or recover towards the natural state

  16. The problem is we do not know much about life in the sea – it is out of sight

  17. Most countries try -1. To protect the large special things

  18. 2. To sustain fisheries

  19. 3. And some oddments

  20. But these things are only a tiny part of life in the sea

  21. Marine life is abundant, varied, complex and different from life on land

  22. It is even difficult to tell the plants from the animals

  23. If we have places in the sea where there are no disturbances – would these marine reserves have any use?

  24. We could them to find out what is natural, and what we have changed.

  25. Counting fish – a place to start

  26. But even well-meant disturbances matter –like people feeding fish

  27. So in the reserve fish mob the diverswhile outside they flee

  28. Do we believe the fish counts that show more fish in the reserve than outside?

  29. Check by fishing ! (with barbless hooks)

  30. Results of 4 surveys for snapper Inside the reserve

  31. Outside reserve

  32. The tagging system – inject coloured latex

  33. Into a fin ray – this one yellow in a tail fin ray

  34. Third method of counting fish.Video camera over a bait box

  35. No divers, no hooks, just sit in the boat and watch on video

  36. Cheaper Easier No harm to fish So taken to many other places including the Poor Knights Islands

  37. Some fishing at Poor Knights till November 1998

  38. No increase at places still fished

  39. Movement matters Fish can be tracked with acoustic tags

  40. And their position fixed with sound receivers

  41. One snapper’s range in a week

  42. With the first two marine reserves we learnt important new things about snapper – although snapper were the best studied fish

  43. Also new things about rock lobster

  44. Complex movements

  45. New behaviour

  46. Changes with time

  47. Heavily fished species increase inside marine reserves but this is only the start of the story -

  48. The big changes are to habitats

  49. In 1976 the commonest sub-tidal reef habitat was grazed by sea-urchins