Fig. 2. Distribution of 5-HT-IR cells expressed as the average staining intensity
(pixels) from lamellar tips (0) to the central axis of the filament (100) in
(A) O. mykiss, (B) H. lacerdae, (C) H. malabaricus
and (D) C. auratus. Shaded area represents the 95% confidence
interval associated with the mean distribution (solid line) for each fish
species. (E) Comparison of the mean distribution of 5-HT-IR cells among the
four species. Broken line represents the division between lamellae and
filament.