Friday, May 18, 2012

121 Great White Sharks at Isla Guadalupe?

Don't forget to count us!
 Note: Apologies to George Probst who runs the fine blog Dorsal Fin Blog for the original image mistake on this post.

The pictures donated by our shark divers from the past ten seasons have been evaluated.

Last Monday Nicole Nasby-Lucas, the scientist I'm working with on the

We now count 121 individual Great White Sharks at Isla Guadalupe.

By evaluating those pictures, we  not only keep track of the numbers of sharks, but can also track how many years they have been at the Island. Some, like our buddies Shredder, Bruce, Jacques, etc. have been there every year since 2001.

Another interesting fact that has been discovered, is regarding adult females.

While males come to the Island every year, the females come every other year. In the "off" year, they give birth along the Baja coast and in the Sea of Cortez.

This research is only possible with the assistance of our shark divers.



Martin Graf
Dive Operations Manager
Shark Diver/Horizon
Isla Guadalupe, Mexico

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at