A comparison of β‐adrenoceptors and muscarinic cholinergic receptors in tissues of brown bullhead catfish (Ameiurus nebulosus) from the black river and old woman creek, Ohio

Abstract

Abstract-␤-Adrenoceptors (␤ARs) and muscarinic cholinergic receptors were measured in brain, gill, and heart tissues of brown bullhead catfish exposed to polycyclic aromatic hydrocarbons in the Black River, Ohio, USA, and were compared to values from Old Woman Creek, Ohio, a reference site. A decreased number of ␤ARs were found in the gill from Black River fish, possibly indicating a compensatory response subsequent to chemical stress.