Organochlorine residues in bat guano from nine Mexican caves, 1991

By: , and 



Samples of bat guano, primarily from Mexican free-tailed bats (Tadarida brasiliensis), were collected at nine bat roosts in caves in northern and eastern Mexico and analysed for organochlorine residues. DDE, the most abundant residue found in each cave, was highest (0.99 p.p.m. dry weight) at Ojuela Cave, Durango. Other studies of DDE in bat guano indicate that this concentration is too low to reflect harmful concentrations in the bats themselves. The DDE at Ojuela may represent either lingering resides from use of DDT years ago in the Ojuela area or perhaps depuration loss from migrant bats with summer maternity roost(s) in a DDE-contaminated area such as Carlsbad Cavern, New Mexico. Presence of o,p'-DDT at Tio Bartolo Cave, Nuevo Leon, indicates recent use of DDT, but the concentration of this contaminant was low. Possible impacts on bat colonies of the organophosphorus and carbonate insecticides now in extensive use are unknown.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Organochlorine residues in bat guano from nine Mexican caves, 1991
Series title Ecotoxicology
DOI 10.1007/BF00116344
Volume 4
Issue 4
Year Published 1995
Language English
Contributing office(s) National Wetlands Research Center
Description p. 258-265
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Ecotoxicology
First page 258
Last page 265
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