Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Brown Treesnake morphological and behavioral differences following ingestion of large meals, 2015 Brown Treesnake morphological and behavioral differences following ingestion of large meals, 2015
Data set resulting from monitoring the behavior of snakes (n = 62) that had been feed a standardized large meal with transmitter, proportional to their body mass, to make direct comparisons to a control group of snakes that had not been fed a meal (only the transmitter). Transmitters were equipped with a two-position switch that changes pulse rate when the body position of the animal...
Surveillance and reports of Brown Treesnakes on Saipan, 1980-2020 Surveillance and reports of Brown Treesnakes on Saipan, 1980-2020
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...
Brown Treesnake trap captures, Guam National Wildlife Refuge, 2014 Brown Treesnake trap captures, Guam National Wildlife Refuge, 2014
Over a 22-week period both with and without active Brown Treesnake (BTS) snake removal, we evaluated snake-trap contact rates at mouse- and bird-lure traps within the Guam National Wildlife Refuge in 2014. Bird-lure traps served as a proxy for reintroduced nesting birds. Data consists of 3 files generated from camera surveillance and trapping using mouse and bird lures in conventional...
Offspring, dam, sire pedigree assignments in a managed population of Brown Treesnakes on Guam Offspring, dam, sire pedigree assignments in a managed population of Brown Treesnakes on Guam
In this dataset offspring are assigned to a dam and sire using information from single nucleotide polymorphisms (SNPs) from previously published pedigree reassignments of Brown Treesnakes within the U.S. Geological Survey's Brown Treesnake study enclosure on Northwest Field of Andersen Air Force Base, Guam (Levine and Yackel Adams 2021 and Nafus 2021) to update the overall pedigree...
Brown Treesnake detections on transects using potential attractants of live-mouse lures or fish-spray scent, Guam Brown Treesnake detections on transects using potential attractants of live-mouse lures or fish-spray scent, Guam
Nocturnal visual encounter surveys for Brown Treesnakes were collected and summarized into 4 plain text files (csv format): CapturesLure, SurveysLure, CapturesScent, and SurveysScent. Capture files contain unique Passive Integrated Transponder (PIT) tag identification and measurements of snakes with dates and locations of capture. Survey files contain the dates of transect sampling and...
Data release for cosmogenic beryllium-10 exposure ages of boulders deposited on moraines in the southern Sawatch and Sangre de Cristo Mountains, southern Colorado Data release for cosmogenic beryllium-10 exposure ages of boulders deposited on moraines in the southern Sawatch and Sangre de Cristo Mountains, southern Colorado
This report summarizes the geochronologic results from boulders deposited on glacial moraines in the southern Sawatch and Sangre de Cristo Mountains of south-central Colorado. Within this report are detailed the methodology used to collect samples of whole rock, determine the concentrations of cosmogenic beryllium 10 in purified quartz isolated from those samples, and use those nuclide