Effects of Organophosphorus Insecticides on Sage Grouse in Southeastern Idaho
- 1 October 1989
- journal article
- research article
- Published by JSTOR in The Journal of Wildlife Management
- Vol. 53 (4), 1139-1146
- https://doi.org/10.2307/3809623
Abstract
Die-offs of sage grouse (Centrocercus urophasianus) were verfied in southeastern Idaho in 1981. We captured 82 apparently healthy grouse to quantify the effects of organophosphorus insecticides (OP''s) and other pesticides on sage grouse in sagebrush (Artemisia spp.) bordering agricultural lands in July 1985 and 1986. Grouse were fitted with radio collars and tracked through part of each summer. At least 18% of 82 radio-tagged grouse in 1985-86 subsequently occupied fields at the time they were sprayed with OP insecticides dimethoate or methamidophos. Cholinesterase (ChE) assays of brains and residue analysis of crop contents indicated that 5 and 16% of the marked sample died from OP''s in 1985 and 1986, respectively. Approximately 200 sage grouse were present in a block of alfalfa sprayed with dimethoate; 63 of these were later found dead and ChE activity in 43 brains suitable for assay were depressed >50%. Maximum residues in crop contents of dead grouse were 18 .mu.g/g methamidophos and 30 .mu.g/g dimethoate. Intoxicated or dead grouse were observed in or near 6 fields sprayed with dimethoate or methamidophos in 1985-86. Twenty of 31 intoxicated grouse radiotagged after being found in dimethoate-sprayed (1986) alfalfa died. Our study indicates that certain pesticides have the potential for adversely affecting grouse populations.This publication has 17 references indexed in Scilit:
- Organophosphate Insecticide (Famphur) Topically Applied to Cattle Kills Magpies and HawksThe Journal of Wildlife Management, 1985
- Natal Dispersal and Lek Fidelity of Sage GrouseOrnithology, 1985
- Pesticide Use on Cereals and the Survival of Grey Partridge Chicks: A Field ExperimentJournal of Applied Ecology, 1985
- Organochlorine pesticide, polychlorobiphenyl, and mercury residues in bald eagle eggs?1969?79?and their relationships to shell thinning and reproductionArchives of Environmental Contamination and Toxicology, 1984
- Disappearance of dimethoate, methamidophos and pirimicarb in lettuceJournal of Environmental Science and Health, Part B, 1984
- Movements and Radionuclide Concentrations of Sage Grouse in Southeastern IdahoThe Journal of Wildlife Management, 1983
- Further interpretation of the relation of organochlorine residues in brown pelican eggs to reproductive successEnvironmental Pollution Series A, Ecological and Biological, 1982
- Recovery of cholinesterase activity in five avian species exposed to dicrotophos, and organophosphorus pesticidePesticide Biochemistry and Physiology, 1981
- Cholinesterase levels and operant extinction.Journal of Comparative and Physiological Psychology, 1966
- Brain Acetylcholinesterase and a Respiratory ReflexAmerican Journal of Physiology-Legacy Content, 1957