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Time to detection data for Point Reyes pond-breeding amphibians, 2017


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Halstead, B.J., Kleeman, P.M., and Rose, J.P., 2018, Time to Detection Data for Point Reyes Pond-breeding Amphibians, 2017: U.S. Geological Survey data release,


Occupancy models provide a reliable method of estimating species distributions while accounting for imperfect detectability. The cost of accounting for false absences is that detection and nondetection surveys typically require repeated visits to a site or multiple-observer techniques. More efficient methods of collecting data to estimate detection probabilities would allow additional sites to be surveyed for the same amount of effort, which would support more precise estimation of covariate effects to improve inference about underlying ecological processes. Time-to-detection surveys allow the estimation of detection probability based on a single site visit by one observer, and therefore might be an efficient technique for herpetological [...]


Point of Contact :
Brian J Halstead
Originator :
Brian J Halstead, Patrick M Kleeman, Jonathan P Rose
Metadata Contact :
Brian J Halstead
USGS Mission Area :
SDC Data Owner :
Western Ecological Research Center
Distributor :
U.S. Geological Survey - ScienceBase

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PORE_amphibian_ttd_data.csv 5.67 KB


Data were obtained to assess the feasibility of using time-to-detection data to account for imperfect detectability when estimating occupancy of pond-breeding amphibians. A secondary goal was to evaluate the probability of occurrence, including environmental correlates, of pond-breeding amphibians at Point Reyes National Seashore to inform conservation and management decisions.


The authors of these data require that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.



  • USGS Data Release Products
  • USGS Western Ecological Research Center



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DOI doi:10.5066/P9A9LA1O

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