Salty days, windy nights

Field season in the Keys officially started this year on June 11th. This year I brought with me two interns who are part of the Certificate Program in Marine Biology at FSU. They will be helping me with my research and will also do a research project of their own.

The first day in the field I like to go out to the reef and do a training dive at Sombrero Key. This way we can all get familiar with the boat, the gear, and diving without worrying about data just yet. This year the visibility was fantastic and the interns passed their check-outs with flying colors!

After the reef intro dive, it’s time to go check out grouper holes in the bay. To date I have information on 60 different solution holes that have at some point been home to a juvenile red grouper. Not all of these holes are occupied in a given year, but one thing I’m interested in is tracking these holes over time to see, in a given year, which holes are occupied?

So far this year occupancy by red grouper is right about 50%, which is right about what it has been the past two summers. The next step for my research is to randomly select a subset of occupied holes from which I will remove the red grouper. Removals are done using hook and line, and once caught the fish will be relocated to an empty hole miles away. After removal I return to the hole every few days to make sure no new grouper has moved in and also to record any changes in the number and identity of the fishes and invertebrates that also live in the holes.

However, I can’t get out and work unless it is relatively calm out. When it is calm, as in the picture above, the bay is beautiful! Too bad it hasn’t looked like this for a while now, thanks to Tropical Storm Debby now churning up the northern Gulf of Mexico. But the forecast starts to look good in a couple of days, so stay tuned for more updates on red grouper, solution holes, and doing research in the Florida Keys!

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