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  4. Mojave Desert Tortoise (Gopherus agassizii) Morphometrics and Egg Data from Seven Sites across the Mojave, (1997-2002)

Mojave Desert Tortoise (Gopherus agassizii) Morphometrics and Egg Data from Seven Sites across the Mojave, (1997-2002)

Dates

Publication Date
Start Date
1997
End Date
2002

Citation

Esque, T.C., Nussear, K.E., Medica, P.A., and Mitchell, C.I., 2021, Mojave Desert tortoise (Gopherus agassizii) morphometrics and egg data from seven sites across the Mojave, (1997-2002): U.S. Geological Survey data release, https://doi.org/10.5066/P97WD6AH.

Summary

These data were acquired from 7 study sites distributed across the range of Gopherus agassizii. Data were collected from 1997 to 2002 as part of three separate studies, although data were not collected at all sites in each year. Radio-transmitters were attached to the carapace of 151 females and VHF radio-telemetry was used to relocate animals to assess reproductive status. Egg production was determined from X-radiographs taken weekly/biweekly intervals (depending on the study) using a portable X-ray machine between April and July or August of each year. In addition, the mean carapace length (MCL) of each tortoise was measured at each time of capture or recapture using calipers (mm). A nesting event was recorded if a female previously [...]

Contacts

Point of Contact :
U.S. Geological Survey, Western Ecological Research Center
Originator :
Todd C Esque, Kenneth E Nussear, Phil A Medica, Corey I Mitchell
Metadata Contact :
Gabrielle A Berry
USGS Mission Area :
Ecosystems
SDC Data Owner :
Western Ecological Research Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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Mojave_Desert_Tortoise_Gopherus_agassizii_Morphometrics_and_Egg_Data_from_Seven_Sites_across_the_Mojave_1997-2002.xml
Original FGDC Metadata
View 		28.28 KB application/fgdc+xml
tortoise_egg_data_otherUSGSsites.csv 3.36 KB text/csv

Material Request Instructions

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.

Purpose

The purpose of these data are to provide a better understanding of the environmental and individual-level variables affecting reproductive output of the Mojave desert tortoise (Gopherus agassizii). Data from 3 separate studies, across 7 study sites, were assembled in order to build a range-wide predictive model of reproductive output as a function of climate variation and individual-level attributes.

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  • USGS Data Release Products
  • USGS Western Ecological Research Center

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P97WD6AH

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