A

Figure 2. (A) Dorsal skin of unexposed channel catfish (Ictalurus punctatus). Epidermis and dermis close to the dorsal-most portion is 10 or more cells thick and contains some mucous (single arrow) and club (double arrow) cells. Scale bar equals 20 /¿m. (B) Dorsallateral skin of channel catfish exposed to UV-B radiation for 24 h. Club cells are often vacuolated and hypertrophied (double arrow) in this group. Sunburn cells (single arrow) with perinuclear halo are also observed. Scale bar equals 10 /¿m. [From Ewing et al. 17.]

Figure 2. (A) Dorsal skin of unexposed channel catfish (Ictalurus punctatus). Epidermis and dermis close to the dorsal-most portion is 10 or more cells thick and contains some mucous (single arrow) and club (double arrow) cells. Scale bar equals 20 /¿m. (B) Dorsallateral skin of channel catfish exposed to UV-B radiation for 24 h. Club cells are often vacuolated and hypertrophied (double arrow) in this group. Sunburn cells (single arrow) with perinuclear halo are also observed. Scale bar equals 10 /¿m. [From Ewing et al. 17.]

Figure 3. Tiger salamander (Ambystoma tigrinum) following 48 h of UV exposure. Note extensive fungal infections (arrows) over skin surface.
0 0

Post a comment