Simulation of cholinesterase inhibition caused by sublethal exposure of grassland birds to insecticides in Texas /
"significant" exposure and at which birds may experience
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | "significant" exposure and at which birds may experience (1) simulating field studies and comparing model predictions Although insecticide applications have killed wildlife, among crop fields were more equal. Granivores experienced the and insecticide decay reasonably approximated reality. applications on birds, I created a simulation model of bird applied at maximum recommended rates I or 2 times. In this available. Carnivores barely experienced ChE inhibition because their carnivorous bird species exceeded 20% at some point during ChE inhibition in I individual from each of 15 wild bird ChE inhibition than carbamates. I used the model to predict ChE inhibition to foraging location, diet selection, and compoundspecific ChE inhibition in different wild birds is daily intake rate. Except for ChE inhibition caused by the direct effects of insecticide exposure usually are sublethal. evaluated the model's ability to predict ChE inhibition by excreted ingested residues. Organophosphates caused greater exposure and to predict sublethal impact of insecticide foraging in an agricultural landscape. I obtained data to greatest inhibition because simulated plants contained more inhibition in grassland bird species, provided adequate insecticide chlorpyrifos, model predictions of ChE inhibition insecticides in the environment, bird foraging, and insecticides typical for Texas, deposition and decay of knowledge of foraging behavior, diet, insecticide use, and location; however, diet preferences and daily intake became mammalian'prey received few residues and the birds rapidly more important when toxicities of residue concentrations nausea and/or may exhibit minor behavioral changes. Birds residues than insects or mammals. Omnivores experienced severe behavioral or physiological effects. The model may be simulate applications of organophosphorus and carbamate Simulated ChE inhibition was most sensitive to foraging slightly less inhibition, followed by insectivores. species over a 6-month period during which insecticides were subsequent cholinesterase (ChE) inhibition in birds. I the 6-month simulation, a sublethal level that denotes To evaluate factors that contribute to dietary insecticide to field data, and (2) evaluating the relative sensitivity of useful to predict insecticide exposure of and sublethal ChE with greater ChE inhibition have a higher chance of more worse-case scenario, mean ChE inhibition in most non- |
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| Item Description: | "Major subject: Wildlife and Fisheries Sciences". Vita. |
| Physical Description: | ix, 72 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 57-65. |