Fig. 4
(a to d) Tissue sections of thyroid gland of Senegalese sole at 30 dph showing thyroid follicles from controls (a) and 1.56 (b), 3.12 (c) and (6.25) malathion exposed larvae: a Control specimens showing a typical distribution of thyroid follicles around the ventral aorta. c to d Thyroid gland from malathion exposed specimens showing a reduction in number, size and epithelial height of thyroid follicles in comparison with controls. e to h T4 immunolocalisation in Senegalese sole larvae at 30 dph: e control and f 1.56 μg/L malathion exposed larvae showing positive staining in thyrocytes and colloid content, and in plasma content from vasculature; g 3.12 and h 6.25 μg/L malathion exposed larvae showing a weak T4 immunostaining in the colloidal content but not in the thyrocytes, neither in the plasma content. Scalebar represents 300 μm