**This blog entry orginally appeared on the website oceanspaces.org.**/p>
The ‘Zero Data Project’ for Sevengill Sharks
Didn’t see any sharks on your dive today? No problem – – we still need your data!
‘Zero data’ is an important concept in long-term population studies in a fixed location with a single species: it’s also called ‘Presence/Absence’ data, meaning, we still want to know when you did *not* see a certain species in a given location, because it tells us a lot about why that particular species may or may not be present at certain times of the year.
We will be including South Bay, South Africa and several locations in New Zealand, as well as areas along the coast of California.
Watch this space for a link to the survey, coming soon.