Table 2.

Bite rates, coral use, and feeding selectivity of five Chaetodon butterflyfishes at Lord Howe Island, ordered according to increasing selectivity. Significance of prey selection was assessed using forage selection ratios and Bonferroni corrected 95% confidence intervals (“=“indicates prey that were used in proportion to availability, “+” indicates prey used significantly more than expected, “−” indicates prey used less than expected, and “0” indicates prey that were not used at all). Overall significance of feeding selectivity was tested using total forage ratios, comparing relative use of different prey categories to their availability across the three study sites (Manly et al. 2002)

Species	n	Bite rate	Hard corals (%)	Arborescent Acropora	Tabular Acropora	Isopora	Pocillopora	Porites	Soft corals	Total Forage Ratio	Sig.
Chaetodon melannotus	67	2.85	6.28	3.14% (−)	1.05% (−)	0.52% (−)	1.05% (−)	0.52% (−)	45.03% (+)	1797.53	<0.001
Chaetodon lunulatus	51	16.69	99.76	30.55% (−)	6.46% (+)	3.06% (=)	29.38% (+)	20.92% (+)	0.00% (0)	2849.47	<0.001
Chaetodon plebeius	65	15.85	99.90	23.20% (−)	16.21% (+)	26.70% (+)	19.42% (=)	9.81% (+)	0.00% (0)	3499.17	<0.001
Chaetodon tricinctus	141	8.33	100	51.57% (=)	22.38% (+)	1.96% (−)	19.23% (=)	0.68% (−)	0.00% (0)	3940.70	<0.001
Chaetodon trifascialis	73	17.63	100	55.71% (=)	38.54% (+)	0.39% (−)	3.89% (−)	0.23% (−)	0.00% (0)	4552.50	<0.001