4.3.1.4 Larval size
A delay in development was also evident with respect to the growth of the last two pairs of arms to develop (PD and EO). In controls, these arms reached near-maximum length by 15 d post-fertilisation, with little subsequent growth (Figure 4.4). However, in all copper treatments, PD and EO were not fully developed by 15 d and daily growth rate was significantly higher than controls, especially in the High Chronic treatment, with no difference between sources of copper (Table 4.6). The final size late in development was not significantly different between copper levels and controls.
Table 4.6: Effect of copper exposure (Level) and source of copper (Source) on Evechinus chloroticus growth between 15 and 24 days post-fertilisation. Analysed using two-way ANOVA on linear model with Bonferroni correction. Significant effects (p < 0.01) are highlighted in bold.