Hi everyone,
My name is Sean Canfield - I'm the diver to which Tyler was referring. He was kind enough to make this thread, and you were kind enough to respond, so thank you all very much!
Just thought I'd update you on my activities and my success thus far!
I'm currently based at the Wrigley Institute in Big Fisherman's Cove, Catalina Island. So far I've sampled tissues from 68 sharks from the Isthmus region of the island.
I recently completed a 5-day trip to Malibu for some sampling on the mainland. I'm happy to report that in 7 dives (5 fewer than I had hoped) I was able to sample tissues from 42 horn sharks! For population genetic analysis, 30 is considered a good minimum sample size, and while I was aiming for about 50 sharks (ambitious, I know), 42 exceeded my expectations. I was primarily diving off of Malibu Road and just a couple hundred yards east of Big Rock, and we averaged about 6 sharks per dive. The surge was formidable and visibility was pretty terrible (we were lucky to get more than five feet of visibility), but there were still times where we were almost literally
tripping over horn sharks. I get the impression that horn sharks are one of those animals that are easy to miss when you're not looking for them!
My next trip will be to Palos Verdes - specifically, Malaga Cove. MC happens to be one of the sites listed on my permit from CDFW, and seemed to get a big enough endorsement that I think it will be worth my time. I've been studying maps and videos (many of the videos include footage of horn sharks, which is highly encouraging), and reading advice on websites. I'm dreading the climb to and from the site, but sometimes fieldwork is hard. Still better than working in the lab!
Afterwards I'll return to Catalina, and in August I'll make my final mainland excursion to the Laguna area (Divers Cove, Shaw's Cove, etc.). After my Malibu trip, let's just say that I'm cautiously optimistic.
If you guys can make any specific recommendations about any of these sites (particularly Malaga Cove), I'd be extremely grateful.
I'll let you know how the rest of my trip goes.
Thanks again, guys!
Cheers,
SC