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Effects of DDE on experimentally poisoned free-tailed bats (Tadarida brasiliensis): Lethal brain concentrations

Journal of Toxicology and Environmental Health

By:
and
DOI: 10.1080/15287397709529623

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Abstract

Adult female free-tailed bats (Tadarida brasiliensis) were collected at Bracken Cave, Texas, and shipped to the Patuxent Wildlife Research Center. Treated mealworms (Tenebrio molitor) containing 107 ppm DDE were fed to 17 bats; five other bats were fed untreated mealworms. After 40 days on dosage, during which one dosed bat was killed accidentally, four dosed bats were frozen and the remaining 17 were starved to death. The objective was to elevate brain levels of DDE to lethality and measure these concentrations. After the feeding period, dosed bats weighed less than controls. After starvation, the body condition of dosed bats was poorer than that of controls even though there was no difference in the amounts of carcass fat. During starvation, dosed bats lost weight faster than controls. Also, four dosed bats exhibited the prolonged tremoring that characterizes DDE poisoning. DDE increased in brains of starving bats as fat was metabolized. The estimated mean brain concentration of DDE diagnostic of death was 519 ppm with a range of 458-564 ppm. These values resemble diagnostic levels known for two species of passerine birds, but they exceed published levels for two free-tailed bats from Carlsbad Caverns, New Mexico.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of DDE on experimentally poisoned free-tailed bats (Tadarida brasiliensis): Lethal brain concentrations
Series title:
Journal of Toxicology and Environmental Health
DOI:
10.1080/15287397709529623
Volume
3
Issue:
5-6
Year Published:
1977
Language:
English
Publisher:
Taylor and Francis
Contributing office(s):
Patuxent Wildlife Research Center
Description:
893-901
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Toxicology and Environmental Health
First page:
893
Last page:
901
Number of Pages:
9