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Fig. 7. Effect of goitrogen treatment on pelvic fin development. (A) A
significantly smaller proportion of fish in the methimazole and
KClO4 treatments developed pelvic fins when compared to the control
(P=0.0009). Values are means ± s.e.m. (N=7-8) and
letters indicate pairwise differences (Tukey HSD test). (B) The proportion of
fish with pelvic fins plotted against rearing temperature for each treatment.
Elevated rearing temperatures resulted in a lower proportion of fish
developing pelvic fins (P=0.0196). Each data point represents the
mean of two replicated buckets per temperature value (except the point
indicated by asterisk, which represents a single bucket).