. 2012 Dec 12;7(12):e51938. doi: 10.1371/journal.pone.0051938

Table 3. Results of two-factor ANCOVA comparing fish density between zones (control versus impact) and between years (2004–2009), with habitat indices as covariates^a.

Source of variation	Total coral cover (d.f. = 1, 309)	Hard coral cover (d.f. = 1, 309)	Structural complexity (d.f. = 1, 309)	Zone(d.f. = 1, 309)	Year(d.f. = 3, 309)	Zone × Year(d.f. = 3, 309)
Coral trout^b	0.378	0.286	0.613	0.048	0.001	0.118
Coral trout (excl. 2009 data)	0.168^c	0.190^c	0.773^c	0.286^c	0.038^d	0.043^d
Stripey snapper^b	0.958	0.818	0.013	0.445	0.100	0.299
Parrotfish^b	0.437	0.773	0.164	0.362	0.363	0.214
Bommie cod^b	0.153	0.050	0.305	0.225	0.046	0.238
Rabbitfish	0.182	0.321	0.916	0.010	0.111	0.669
Hard coral cover	–	–	–	0.254^e	0.145^f	0.107^f
Total coral cover	–	–	–	0.001^e	0.305^f	0.755^f
Complexity	–	–	–	0.001^e	0.291^f	0.280^f

Also shown are results of two-factor ANOVA of habitat indices. Data originate from 40 underwater visual transects per zone per year. Values are probabilities. d.f., degrees of freedom.

Data were transformed (y = Log₁₀[x+1]) to homogenize variances.

d.f. = 1, 231.

d.f. = 2, 231.

d.f. = 1, 312.

d.f. = 3, 312.

Table 3. Results of two-factor ANCOVA comparing fish density between zones (control versus impact) and between years (2004–2009), with habitat indices as covariatesa.

Table 3. Results of two-factor ANCOVA comparing fish density between zones (control versus impact) and between years (2004–2009), with habitat indices as covariates^a.