110 USGS/BRD/ITR-2000-0012 



Table, (continued) 



a Source is Sowls et al. (1980). 



b Source is Sowls et al. (unpublished survey data). 



c Source is Briggs et al. (1983). 



d Source is Takekawa et al. ( 1 990). 



c McChesneyetal. ( 1998) indicated that 1979-81 data are not directly comparable to 1985-95 data. 



f McChesney et al. (1998, 1999) reexamined survey data from 1979 to 1982 and derived revised whole-colony counts at these 

 colonies. We have not included these revised numbers in this appendix but did use this information to verify surveys selected for 

 analyses in this report. 



g For 1985, Sydeman et al. ( 1997: 123) used a new combined total of 30,841 birds (based on a reexamination of raw data) as a 

 "standardized" total for calculating an estimate of colony size for 1985. In fact, the correct value for this new total is 30,716 birds, 

 based on data in their Appendix 6. However, they also omitted the g correction factor (0.84 1 ) used by Takekawa et al. ( 1 990) to 

 make aerial survey counts in 1 985 more comparable with 1 986 and later surveys. In this appendix, we used the new combined 

 totals in Sydeman et al. (1997). However, since West End Island (WEI) was surveyed with aerial photographs, we applied the g 



