Last updateTue, 18 Apr 2017 8am

The lowdown

youngster-smallerStudies have been done since the 70s, counting the number of crayfish in the shallow waters of the NE coast of New Zealand in:
     1) areas with no protection
     2) areas with limited protection (only recreational fishing, no commercial)
     3) areas that are FULLY protected (100% no take).

This graph shows that in protected areas we can expect around 1000 legal-size crays per hectare, compared with 1.75 per hectare in fished waters.

Graph show protected areas versus non protected

And to paint a bigger picture showing how marine protection affects the full spectrum of marine life, this illustration gives an idea of what you can expect in a fully protected marine reserve, by comparison with unprotected water. 




You can also follow a photographic story of how protected areas change over time: Ever seen a kina barren?

Thanks to Roger Grace and www.marinenz.org.nz for letting us use images and adapt data.

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