Fig. 5. Whole-body T4 (A) and T3 (B) contents in B. gargarizans larvae exposed to control groups and different concentrations NO3–N (A10, A50, A100) at stage G42. The data
are presented as mean ± SE. Controls are denoted by C. ⁄ = significantly different from control (p 6 0.05). ⁄⁄ = highly significant different from control (p 6 0.01).