chapter  10
24 Pages

Adrenocortical Toxicology in Fishes

ByAlice Hontela, Mathilakath M. Vijayan

Teleost fishes, unlike mammals, do not have a discrete adrenal gland. In the piscine model, the adrenal tissue is located in the anterior or head portion of the kidney, a long thin organ lining the dorsal wall of the abdominal cavity. The steroidogenic (adrenocortical) and catecholaminergic (chromaffin) cells are intermingled in the head-kidney region (known as the interrenal tissue), mostly around the postcardinal vein, and there is no cortex or medulla (Norris, 1997; Wendelaar, 1997).