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There are two datasets included in this entry. The "morph" dataset contains 6 columns of data on brown treesnakes and rats collected prior to and during arena trials for trialing fencing material for multispecies barrier construction. The "trials" dataset includes 25 columns of brown treesnake and rat data collected prior to, during, and after arena trials. There are four data files associated with this data release. They include "BTS_Breach Attempts_29Jun2020.csv" which describes data associated with attempts by brown treesnakes to escape the fence arena' "BTS_Morph_29Jun2020.CSV", which describes morphometrics of captured and trialed snakes; "Rats_Breach Attempts_29Jun2020.csv", which describes attempts to breach...
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There are two datasets included in this entry. The diurnal dataset contains 28 columns of data collected during transects surveys. The nocturnal dataset contains 52 columns. We randomly select 56 sites, each 50 m in length, from 37,968 m of transects spanning the island that were originally created for bird surveys in 1982 through the cooperative efforts of the U.S. Fish and Wildlife Service, the Department of Natural Resources of CNMI, and the U.S. Forest Service. For diurnal surveys, 56 transects were surveyed twice per day for 1–3 consecutive days resulting in six survey occasions. For nocturnal surveys, we surveyed 51 of the 56 transects 4 times per night for 1–3 consecutive nights resulting in 12 survey occasions....
Categories: Data;
Tags: Northern Mariana Islands,
Saipan,
USGS Science Data Catalog (SDC),
amphibians,
biogeography, All tags...
biota,
environment,
invasive species,
maps and atlases,
native species,
reptiles, Fewer tags
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Available active surveillance efforts for Brown Treesnakes on the island of Saipan via nocturnal visual encounter surveys and trapping from 1999-2018 were collected and summarized into 3 csv files (TRAP1999, BTSRRTSaipanTRAP, and BTSRRTSaipanVISUAL). Location and date of non-confirmed reports of snakes 1982-2013 via passive surveillance were compiled into a fourth file (Saipan BTSSightings1980_2020.csv) with their associated credibility score of 1-5 (5 = completely credible) defined by a panel or small group of Brown Treesnake experts. Trapping surveillance efforts used a modified minnow trap as a snake trap. Traps are suspended horizontally from natural vegetation or fences 1-1.5 meter (m) off the ground. Within...
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The dataset contains 16 columns of data collected on invasive Brown Treesnakes (Boiga irregularis) at a study site known as the Habitat Management Unit (HMU) in northern Guam. Snakes were fitted with radio-transmitters and teams of 2-4 biologist listened for signals from transmitters every seven days to determine if snakes were alive or dead. Survival data was then modeled in Program MARK to assess the effect of aerially applied toxic baits on snake mortality, including the effect of snake size covariates. In addition, this dataset contains snake capture information from reference sites on Guam that was used to demonstrate that our sample was representative of the size distribution in limestone forest habitat on...
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