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Effectiveness of bait tubes for brown treesnake control on guam

2013; Wiley; Linguagem: Inglês

10.1002/wsb.297

1938-5463

Björn Lardner, Amy A. Yackel Adams, Julie A. Savidge, Gordon H. Rodda, Robert N. Reed, Craig Clark,

Turtle Biology and Conservation

Wildlife Society BulletinVolume 37, Issue 3 p. 664-673 Tools and Technology Effectiveness of bait tubes for brown treesnake control on guam Björn Lardner, Corresponding Author Björn Lardner Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, 80523-1474 USAE-mail: [email protected]Search for more papers by this authorAmy A. Yackel Adams, Amy A. Yackel Adams United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USASearch for more papers by this authorJulie A. Savidge, Julie A. Savidge Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, 80523-1474 USASearch for more papers by this authorGordon H. Rodda, Gordon H. Rodda United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USAPresent address: 404 Adobe Drive, Durango, CO 81302, USASearch for more papers by this authorRobert N. Reed, Robert N. Reed United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USASearch for more papers by this authorCraig S. Clark, Craig S. Clark United States Department of Agriculture, Wildlife Services, 233 Pangelinan Way, Barrigada, GU, 96913 USASearch for more papers by this author Björn Lardner, Corresponding Author Björn Lardner Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, 80523-1474 USAE-mail: [email protected]Search for more papers by this authorAmy A. Yackel Adams, Amy A. Yackel Adams United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USASearch for more papers by this authorJulie A. Savidge, Julie A. Savidge Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, 80523-1474 USASearch for more papers by this authorGordon H. Rodda, Gordon H. Rodda United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USAPresent address: 404 Adobe Drive, Durango, CO 81302, USASearch for more papers by this authorRobert N. Reed, Robert N. Reed United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO, 80526 USASearch for more papers by this authorCraig S. Clark, Craig S. Clark United States Department of Agriculture, Wildlife Services, 233 Pangelinan Way, Barrigada, GU, 96913 USASearch for more papers by this author First published: 11 August 2013 https://doi.org/10.1002/wsb.297Citations: 10 Associate Editor: M. J. Peterson Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat ABSTRACT In 2008, we studied simulated toxicant efficacy to control invasive brown treesnakes (Boiga irregularis) using bait tubes (elongate bait stations that reduce non-target bait take) in a 5-ha enclosure in Guam (U.S. Territory) with a known population of snakes. Instead of toxicants, we implanted radiotransmitters in small (6.6 ± 1.4 g) and large (21.8 ± 2.9 g) bait-mouse carcasses, offered from 2 types of bait tubes over a 3-month period. The known snake population allowed us to characterize not only the snakes taking bait, but also those evading our mock control effort. Tube design had no effect on take rate, but snout–vent length was a strong predictor of bait take: none of the 30 snakes <843 mm in length took any bait, whereas 77 of the 126 snakes ≥843 mm in length took 164 baits. While medium-sized snakes preferentially ingested small bait (and the largest snakes tended to take large mice more frequently), some of the smallest snakes that took bait ingested large mice. Snake body condition was positively correlated to take rate, but snake sex had no discernible effect. Our data show that there is a relatively narrow size (and, thus, time) gap between the size at which the snakes become susceptible to bait-mouse take and the size at which they become sexually mature. This has implications for the timing of repeated baiting efforts, if the goal is eradication rather than suppression. Published 2013. This article is a U.S. Government work and is in the public domain in the USA. Supporting Information Additional supporting information may be found in the online version of this article at the publisher's web-site. Filename Description wsb297-sm-0001-SuppAppA.docx18.7 KB Supplementary Appendix A: Random-effect Poisson models used to evaluate data set with all 156 brown treesnakes, Guam, 2008. This table lists all models estimated, as opposed to the 95% confidence set (Burnham and Anderson 2002:169; model ranks 1–11; shown in Table 1 of the paper). wsb297-sm-0002-SuppAppB.docx17.8 KB Supplementary Appendix B: Random-effect Poisson models used to evaluate data subset (125 snakes ≥843 mm SVL), Guam, 2008. This table lists all models estimated, as opposed to the 95% confidence set (Burnham and Anderson 2002:169; model ranks 1–9; shown in Table 3 of the paper). Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. LITERATURE CITED Anderson, D. R. 2008. Model based inference in the life sciences: a primer on evidence. 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