Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region
Abstract Peregrine falcons (Falco peregrinus) have been recorded nesting in Big Bend National Park, Texas, USA and other areas of the Chihuahuan Desert since the early 1900s. From 1993 to 1996, peregrine falcon productivity rates were very low and coincided with periods of low rainfall. However, low...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1072.8675 2023-05-15T16:09:58+02:00 Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region M Mora R Skiles B Mckinney M Paredes D Buckler D Papoulias D Klein The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8675 http://people.tamu.edu/%7Emmora/ENPO02-116.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8675 http://people.tamu.edu/%7Emmora/ENPO02-116.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://people.tamu.edu/%7Emmora/ENPO02-116.pdf text 2002 ftciteseerx 2020-04-26T00:24:58Z Abstract Peregrine falcons (Falco peregrinus) have been recorded nesting in Big Bend National Park, Texas, USA and other areas of the Chihuahuan Desert since the early 1900s. From 1993 to 1996, peregrine falcon productivity rates were very low and coincided with periods of low rainfall. However, low productivity also was suspected to be caused by environmental contaminants. To evaluate potential impacts of contaminants on peregrine falcon populations, likely avian and bat prey species were collected during 1994 and 1997 breeding seasons in selected regions of western Texas, primarily in Big Bend National Park. Tissues of three peregrine falcons found injured or dead and feathers of one live fledgling also were analyzed. Overall, mean concentrations of DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene], a metabolite of DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane], were low in all prey species except for northern rough-winged swallows (Stelgidopteryx serripennis, mean=5.1 mg/g ww). Concentrations of mercury and selenium were elevated in some species, up to 2.5 mg/g dw, and 15 mg/g dw, respectively, which upon consumption could seriously affect reproduction of top predators. DDE levels near 5 mg/g ww were detected in carcass of one peregrine falcon found dead but the cause of death was unknown. Mercury, selenium, and DDE to some extent, may be contributing to low reproductive rates of peregrine falcons in the Big Bend region. # Text Falco peregrinus peregrine falcon Unknown |
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Abstract Peregrine falcons (Falco peregrinus) have been recorded nesting in Big Bend National Park, Texas, USA and other areas of the Chihuahuan Desert since the early 1900s. From 1993 to 1996, peregrine falcon productivity rates were very low and coincided with periods of low rainfall. However, low productivity also was suspected to be caused by environmental contaminants. To evaluate potential impacts of contaminants on peregrine falcon populations, likely avian and bat prey species were collected during 1994 and 1997 breeding seasons in selected regions of western Texas, primarily in Big Bend National Park. Tissues of three peregrine falcons found injured or dead and feathers of one live fledgling also were analyzed. Overall, mean concentrations of DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene], a metabolite of DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane], were low in all prey species except for northern rough-winged swallows (Stelgidopteryx serripennis, mean=5.1 mg/g ww). Concentrations of mercury and selenium were elevated in some species, up to 2.5 mg/g dw, and 15 mg/g dw, respectively, which upon consumption could seriously affect reproduction of top predators. DDE levels near 5 mg/g ww were detected in carcass of one peregrine falcon found dead but the cause of death was unknown. Mercury, selenium, and DDE to some extent, may be contributing to low reproductive rates of peregrine falcons in the Big Bend region. # |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M Mora R Skiles B Mckinney M Paredes D Buckler D Papoulias D Klein |
spellingShingle |
M Mora R Skiles B Mckinney M Paredes D Buckler D Papoulias D Klein Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
author_facet |
M Mora R Skiles B Mckinney M Paredes D Buckler D Papoulias D Klein |
author_sort |
M Mora |
title |
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
title_short |
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
title_full |
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
title_fullStr |
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
title_full_unstemmed |
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region |
title_sort |
environmental contaminants in prey and tissues of the peregrine falcon in the big bend region |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8675 http://people.tamu.edu/%7Emmora/ENPO02-116.pdf |
genre |
Falco peregrinus peregrine falcon |
genre_facet |
Falco peregrinus peregrine falcon |
op_source |
http://people.tamu.edu/%7Emmora/ENPO02-116.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8675 http://people.tamu.edu/%7Emmora/ENPO02-116.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1765995225423020032 |