Size Bias in Visual Searches and Trapping of Brown Treesnakes on Guam
| Autor: | Julie A. Savidge, Aaron R. Ellingson, Gordon H. Rodda, Michelle T. Christy, Claudine L. Tyrrell |
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| Rok vydání: | 2007 |
| Předmět: |
education.field_of_study
Ecology biology Lizard Population Zoology Trapping biology.organism_classification Invasive species Population reduction biology.animal General Earth and Planetary Sciences education Ecology Evolution Behavior and Systematics Nature and Landscape Conservation General Environmental Science Boiga irregularis |
| Zdroj: | Journal of Wildlife Management. 71:656-661 |
| ISSN: | 1937-2817 0022-541X |
| DOI: | 10.2193/2005-742 |
| Popis: | The accidental introduction of the brown treesnake (BTS; Boiga irregularis) to the island of Guam after World War II set off a chain of bird, bat, and lizard extirpations. Fortunately, many of the eliminated species have the potential to be restored following population reduction or eradication of the snake. The primary operational tool for population reduction is an effective snake trap, but areas subjected to long-term trapping continue to support BTS, suggesting that some adult snakes are refractory to trapping. We closed a 5-ha area to BTS emigration and immigration and surveyed the population using trapping and visual surveys to determine whether a refractory stratum of adult snakes existed and if trapping was effective for snakes of all sizes. Our surveys included 101 trapping occasions and 109 visual surveys over 309 days, resulting in 2,522 detections of 122 individuals. We detected 44 of 45 supplemented snakes by this intensive sampling effort, which also revealed that trapping was fully... |
| Databáze: | OpenAIRE |
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