Table 1: Survey year and number of reefs surveyed including the number of reefs recorded with outbreaks in that year (figures given in brackets and include both Incipient and Active Outbreaks combined) in the Swain and Capricorn-Bunker Group. Mean COTS per two-minute tow and standard error (SE) are given for each survey year. A different suite of reefs is sampled in each survey year depending on sample design, weather, and logistical considerations. Survey years run from 1 July of the preceding calendar year to 30 June, so, for instance, the 2012 survey year represents reefs surveyed between July 2011 and June 2012.

YearSwain ReefsCapricorn-Bunker Reefs
Number of reefs surveyed (number of outbreaking reefs)Mean COTSSE COTSNumber of reefs surveyed (number of outbreaking reefs)Mean COTSSE COTS

198632 ()0.1340.0628 (0)0.0120.012
198730 ()0.330.1265 (0) 00
198828 ()0.2270.1246 (0)0.0020.002
1989No survey
199020 ()0.2720.2076 (0)00
199121 ()0.2220.1585 (0)0.0050.005
199224 ()0.3400.2186 (0)00
19939 ()0.7810.6714 (0)00
199411 ()0.1200.0903 (0)00
199515 ()0.1420.0793 (0)0.0060.006
199616 ()0.1070.0425 (0)0.0100.006
19978 ()0.8720.4455 (0)0.0120.012
19989 ()1.2300.6464 (0)00
19997 ()0.4310.2254 (0)00
20008 ()2.0940.7974 (0)00
20018 ()18.7757.3714 (0)0.0050.005
20027 ()4.8792.7984 (0)00
20037 ()4.0772.2274 (0)00
20047 ()0.6490.4144 (0)0.0050.005
200513 ()0.0500.0334 (0)00
200619 ()0.0300.0168 (0)00
20076 ()0.0050.0044 (0)00
200817 ()007 (0)00
20097 ()0.0110.0114 (0)00
201015 ()0.0030.0038 (0)0.0180.013
20117 ()0.0020.0023 (0)00
201215 ()0.0030.0026 (1)0.1620.162
20137 ()0.0230.0184 (1)0.0660.066
201414 ()0.0050.0038 (2)0.2010.146