Seasonal Growth of the Purple Sea Urchin Revealed by Sequential Fluorochrome Tagging.

Many studies have applied fluorochrome tagging to examine the growth of animals with calcified skeletons, but most of them have used only a single tag to determine the annual growth rate. We used sequential fluorochrome tagging to study the seasonal growth of the purple sea urchin in Hong Kong waters from February 2012 to February 2013. Sea urchins ranging from 18.

Borehole density on the surface of living Porites corals as an indicator of sedimentation in Hong Kong.

Borehole density on the surface of Porites has been used as an indicator of water quality in the Great Barrier Reef. We assessed the relationship between borehole density on Porites and eight water quality parameters across 26 sites in Hong Kong. We found that total borehole densities on the surface of Porites at 16 of the studied sites were high (>1000individualsm(-2)), with polychaetes being the dominant bioeroders.