| Abstract: | 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. |
| Genre: | Article |
| ProdID: | 1002504 |
| Citation Author: | Clark, D.R., Jr.; Moreno-Valdez, A.; Mora, M.A. |
| Citation Contributing Office: | National Wetlands Research Center |
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| Citation End Page: | 265 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ecotoxicology |
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| Citation Month: | AUG |
| Citation No Pagination: | |
| Citation Number Of Pages: | 8 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | p. 258-265 |
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| Citation Search Results Text: | Organochlorine residues in bat guano from nine Mexican caves, 1991; 1995; Article; Journal; Ecotoxicology; Clark, D.R., Jr.; Moreno-Valdez, A.; Mora, M.A. |
| Citation Start Page: | 258 |
| Citation Volume: | 4 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Organochlorine residues in bat guano from nine Mexican caves, 1991; 1995; Article; Journal; Ecotoxicology; Clark, D.R., Jr.; Moreno-Valdez, A.; Mora, M.A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://dx.doi.org/10.1007/BF00116344 |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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