The Cortisol Levels, Histology, and Fine Structure of Various Tissues of Fish Gambusia affinis (Baird and Girard, 1853) after Exposure to Lead

Figure 7

Cortisol levels in fish organs exposed to lead. A = 0.1 m/L PbCl₂ and B = 1 mg/L PbCl₂. Lowercase letters denote statistically significant differences (a < b < c,  < 0.05). The sample size is N = 5, with each sample comprising a composite of two individuals.