Figure 2. Anal fin elongation and bone segment formation in anal fin ray 3 of female Eastern mosquitofish (Gambusia holbrooki) collected from the Fenholloway and Econfina Rivers.

Data are repsresented as (A) Mean (± standard deviation) of all collection events and, (B) Distribution of anal fin elongation classes between both paper mill exposed (Fenholloway) and reference (Econfina) field sites. An asterisk indicates statistical significance between the two groups as determined using a Student's t-test with p<0.05. For anal fin elongation levels there was an N of 46 and 50 from the Fenholloway and Econfina rivers respectively and a subset N of 4 from both sites for the bone segment evaluation.