Gopherus agassizi

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Desert Tortoise (Gopherus agassizi)

Citation:

Growth and age at maturity of North American tortoises in relation to regional climates

Author(s)
Germano, David J.
Pages
918-931
Year
Volume
72
Exposure Endpoint Type Endpoint Description Units Sex Sample Size Location Type Age-Specific
Growth Rate mean yearly growth rates using calculated carapace lengths over 4 yr intervals; range of 4 site-specific means mm/yr Both Male and Female 25-69 animals/site Western and Eastern Mojave, Sinaloan and Sonoran deserts Exposure Factor Datasets 12-16 yrs
Citation:

Accelerated growth rate and early maturity in Gopherus agassizi (Reptilia: Testudines)

Author(s)
Jackson, Crawford G., Jr., John A. Trotter, Thomas H. Trotter and Mary W. Trotter
Pages
139-145
Year
Issue
2
Volume
32
Exposure Endpoint Type Endpoint Value Endpoint Description Units Sex Sample Size Location Type Age-Specific Lab
Body Weight - Mean BW = 0.00049(CL)^2.795 Body Weight (BW;150 - 1500 g) and carapace length (CL; 100-300 mm) relationship g Not Reported 7 data points, each based on the average of 4 animals Exposure Factor Datasets 0-3 yr post-hatch Laboratory
Citation:

Seasonal reproductive cycle of the desert tortoise (Gopherus agassizii) in the eastern Mojave desert

Author(s)
Rostal, David C., Valentine A. Lance, Janice S. Grumbles and Allison C. Alberts
Pages
72-82
Year
Volume
8
Exposure Endpoint Type Endpoint Value Sex Life Cycle Stage Sample Size Location Type Lab
Time of Torpor or Hibernation Oct. - Apr. Both Male and Female Adult 50 Exposure Factor Datasets Laboratory
Citation:

Changes in desert tortoise populations at four study sites in California

Author(s)
Berry, Kristin H., Lori L. Nicholson, Steve Juarez and A. Peter Woodman
Pages
60-80
Publisher
Desert Tortoise Council
Year
Exposure Endpoint Type Endpoint Value Endpoint Description Units Sex Life Cycle Stage Sample Size Location Type
Survival/ Mortality 2.2 annual mortality rate for subadults and adults from 1975 and 1982 %/yr Both Male and Female Both Adults and Juveniles Not Reported Colorado desert, Chemehuevi Wash and Valley Exposure Factor Datasets
Citation:

Egg production by the desert tortoise (Gopherus agassizii) in California

Author(s)
Turner, Frederick B., Page Hayden, Betty L. Burge and Jan B. Roberson
Pages
93-104
Year
Issue
1
Volume
42
Exposure Endpoint Type Endpoint Description Units Sex Life Cycle Stage Sample Size Location Type California Counties
Clutches or Litters per year range of means for 3 yrs; overall range = 1-3 clutches/yr Female Adult 20-26 animals Ivanpah Valley, Goffs Exposure Factor Datasets San Bernardino
Citation:

Studies of the desert tortoise (Gopherus agassizii)

Author(s)
Woodbury, Angus M. and Ross Hardy
Pages
145-200
Year
Volume
18
Exposure Endpoint Type Endpoint Value Endpoint Description Sex Life Cycle Stage Sample Size Location Type
Time of Mating/ Laying early summer laying Female Not Reported Not Reported Beaver Dam Slope, Washington County (elev., 3200-3500 ft) Exposure Factor Datasets
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OEHHA California Office of Environmental Health Hazard Assessment