While the post hoc test clearly showed significant differences among
the experimental groups, the statistical analysis indicated replicate interactions
for SGR and condition factor (Table 3). The nested ANOVA
showed a significant relationship between carbon dioxide concentration
andweight on day 23 (p b 0.05), although no significant differences
between mean values were found. On day 38, the mean weight of the
high and very high group was significantly reduced when compared
to the control group (p b 0.0001). Both weight and condition factor decreased
linearlywith increasing carbon dioxide concentration on day 38
(p b 0.01). No significant effects fromCO2 exposurewere found onmean
length on any days (Table 3). Mean SGR was significantly reduced for
the three highest carbon dioxide groups during period I compared to
the control group (Table 3; p b 0.05). During period II, only the SGRs
of the two highest carbon dioxide groups were significantly reduced.