Behind the science

Andradi-Brown et al. 2017


Depth-dependent effects of culling—do mesophotic lionfish populations undermine current management?

Andradi-Brown DA, Grey R, Hendrix A, Hitchner D, Hunt CL, Gress E, Madej K, Parry RL, RĂ©gnier-McKellar C, Jones OP, Arteaga M, Izaguirre AP, Rogers AD, Exton DA

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Photos
1

Dom Andradi-Brown and Edd Stockdale gearing up with the help of Erika Gress and Luke Shepherd for a mesophotic CCR dive at The Maze, Turtle Harbour, Utila
(C) Ally McDowell / Thinking Deep Expedition


2

The dive team synchronising a stereo-video camera system underwater. By using a stereo-video system the number of lionfish within fixed transect widths could be rapidly surveyed.
(C) Ally McDowell / Thinking Deep Expedition


3

Invasive lionfish at 60 m off the south shore of Utila. Despite widespread diver-led lionfish culling on Utila substantial lionfish populations remain on mesophotic reefs.
(C) Ally McDowell / Thinking Deep Expedition


4

Jack Laverick poised ready to sample a lionfish from an aggregation encountered at 60 m at Rocky Point, Utila
(C) Ally McDowell / Thinking Deep Expedition


5

Once a lionfish is speared it is photographed in-water and carefully stored so that we can associate the data collected from later dissection with the exact depth and location it was speared
(C) Ally McDowell / Thinking Deep Expedition


6

The results of a good morning of surveys! Collected lionfish ready for dissection, allowing us to relate the health, reproductive maturity and stomach contents of each lionfish to the depth and location it was speared.
(C) Ally McDowell / Thinking Deep Expedition