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Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016

Dates

Publication Date
Start Date
2016-04-25
End Date
2016-07-18

Citation

Yackel Adams, A.A., and Lardner, B., 2020, Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016: U.S. Geological Survey data release, https://doi.org/10.5066/P984A6M8.

Summary

We evaluated three walking paces to estimate (1) how snake detection rate per unit distance changes with increasing pace, and (2) how total number of snakes found by the end of a night of surveying varies with pace when the amount of surveying time per night is held constant. For a “fast” pace we searched the 220 meter-long transect in 10 minutes, corresponding to a walking pace of 1.32 km/h, whereas for a “medium” pace we searched 17.5 minutes, corresponding to a pace of approximately 0.75 km/h. The “slow” pace was the 30 minutes (0.44 km/h) the standard previously adopted for work on Guam. Perch height and sizes of detected snakes were recorded for the three paces.

Contacts

Point of Contact :
Amy A Yackel Adams
Originator :
Amy A Yackel Adams, Bjorn Lardner
Metadata Contact :
Amy A Yackel Adams
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Fort Collins Science Center
USGS Mission Area :
Ecosystems

Attached Files

Click on title to download individual files attached to this item.

Brown Treesnake Perch height by walking pace.csv 2.3 KB
Brown Treesnake SVL by walking pace.csv 2.54 KB
Brown Treesnake Visual Surveys.csv 129.67 KB

Purpose

Quantifying the optimal search pace for one’s study organism in a focal habitat has the potential to substantially increase survey cost-efficacy through optimal survey design.

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Communities

  • Fort Collins Science Center (FORT)
  • USGS Data Release Products

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Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P984A6M8

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