Hi Jim: Went out to the CREWS stick yesterday. It's all there. I cleaned the PAM heads and took several readings on the Siderastrea and Agaricia colony at noon. I have the following results for you to compare. For Sideratrea siderea the average quantum yield was 0.333 and for Agaricia tenuifolia it was 0.466. The PAM heads for the agaricid are definitely in a more shaded part of the colony. Taking PAM measurements on the opposite, sun exposed, side showed much lower quantum yields. Let me know how this compares.
Cheers, Michael
Dr. Michael P. Lesser
Department of Zoology and Center for Marine Biology
University of New Hampshire
Durham, NH 03824
603-862-3442
603-862-3784