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Brain cholinesterase activity of nestling great egrets snowy egrets and black-crowned night-herons

January 1, 1989

Inhibition of brain cholinesterase (ChE) activity in birds is often used to diagnose exposure or death from organophosphorus or carbamate pesticides. Brain ChE activity in the young of altricial species increases with age; however, this relationship has only been demonstrated in the European starling (Sturnus vulgaris). Brain ChE activity of nestling great egrets (Casmerodius albus) collected from a colony in Texas (USA) increased significantly with age and did not differ among individuals from different nests. Brain ChE activity of nestling snowy egrets (Egretta thula) and black-crowned night-herons (Nycticorax nycticorax) collected in one colony each from Rhode Island, Texas and California (USA) also increased significantly with age and did not differ among individuals from different nests or colonies. This study further demonstrates that age must be considered when evaluating exposure of nestling altricial birds to ChE inhibitors.

Citation Information

Publication Year 1989
Title Brain cholinesterase activity of nestling great egrets snowy egrets and black-crowned night-herons
Authors T. W. Custer, H. M. Ohlendorf
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Wildlife Diseases
Index ID 1003061
Record Source USGS Publications Warehouse
USGS Organization Upper Midwest Environmental Sciences Center