Results 41 to 50 of about 381 (151)

Genetic analyses are more sensitive than morphological inspection at detecting the presence of threatened Mojave desert tortoise (Gopherus agassizii) remains in canid scat and raven pellets

Conservation Science and Practice, 2022
Subsidization of predator populations increases predation pressure on prey species, which is exacerbated when natural resources are scarce. Estimating the frequency of predation by subsidized predators on vulnerable species, especially low‐density, long ...
Lillian D. Parker, Jessica D. Quinta, Isabel Rivera, Brian L. Cypher, Erica C. Kelly, Michael G. Campana, Robert C. Fleischer, Ryan Boarman, William I. Boarman, Jesús E. Maldonado   +9 more
doaj   +1 more source

Head-started Agassiz’s desert tortoises Gopherus agassizii achieved high survival, growth, and body condition in natural field enclosures

Endangered Species Research, 2020
We measured survival, growth, and body condition of 8 hatchling cohorts of desert tortoises Gopherus agassizii (living in predator-resistant outdoor pens in the Mojave Desert, California, USA) over 11 yr to evaluate head-starting methods. At 11 yr of age,
Nagy, KA, Henen, BT, Hillard, LS
doaj   +1 more source

High female desert tortoise mortality in the western Sonoran Desert during California’s epic 2012-2016 drought

Endangered Species Research, 2023
We conducted population surveys for desert tortoises Gopherus agassizii at 2 nearby sites in the western Sonoran Desert of California, USA, from 2015-2018, during the driest ongoing 22 yr period (2000-2021) in the southwestern USA in over 1200 yr.
JE Lovich, SR Puffer, K Cummings, TR Arundel, MS Vamstad, KD Brundige   +5 more
doaj   +1 more source

Integrating telemetry data at several scales with spatial capture–recapture to improve density estimates

Ecosphere, 2021
Accurate population estimates are essential for monitoring and managing wildlife populations. Mark–recapture sampling methods have regularly been used to estimate population parameters for rare and cryptic species, including the federally listed Mojave ...
Corey I. Mitchell, Kevin T. Shoemaker, Todd C. Esque, Amy G. Vandergast, Steven J. Hromada, Kirsten E. Dutcher, Jill S. Heaton, Kenneth E. Nussear   +7 more
doaj   +1 more source

Effects of off‐highway vehicle activity on Arizona wildlife: a systematic literature review

The Journal of Wildlife Management, Volume 90, Issue 7, September 2026.
The published literature indicates that off‐highway vehicles (OHVs) predominantly negatively affect native Arizona amphibians, mammals, and reptiles, while effects of OHVs on native Arizona birds are mostly unknown or neutral. Abstract Off‐highway vehicle (OHV) recreation has dramatically increased in Arizona, USA, prompting concerns about potential ...
Hayden K. Hutcherson, Cassidy A. Klovanish, Samuel D. Lisak, Esther S. Rubin, Reilly T. Jackson   +4 more
wiley   +1 more source

Severe mortality of a population of threatened Agassiz’s desert tortoises: the American badger as a potential predator

Endangered Species Research, 2015
In the Mojave Desert of the southwestern United States, adult Agassiz’s desert tortoises Gopherus agassizii typically experience high survival, but population declines associated with anthropogenic impacts led to their listing as a threatened Species ...
PG Emblidge, KE Nussear, TC Esque, CM Aiello, AD Walde   +4 more
doaj   +1 more source

The Southwestern desert tortoise, Gopherus agassizii

Zoologica : scientific contributions of the New York Zoological Society., 1936
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Disentangling Temporal and Environmental Effects on Hematological Values in Prairie Rattlesnakes (Crotalus viridis)

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 7, Page 727-734, August 2026.
ABSTRACT Hematologic assessment is a common clinical tool used to characterize both individual and population health. In ectothermic organisms, the hematologic response is influenced by external factors such as temperature and season, especially in temperate species. Yet, specific environmental effects have received little direct attention.
Ethan J. Kessler, Sarah J. Baker, Ellen Haynes, Amy N. Schnelle, Matthew C. Allender   +4 more
wiley   +1 more source

Quantifying development to inform management of Mojave and Sonoran desert tortoise habitat in the American southwest

Endangered Species Research, 2020
Two tortoise species native to the American southwest have experienced significant habitat loss from development and are vulnerable to ongoing threats associated with continued development.
Carter, SK, Nussear, KE, Esque, TC, Leinwand, IIF, Masters, E, Inman, RD, Carr, NB, Allison, LJ   +7 more
doaj   +1 more source

Dog attacks on wild desert tortoises: A risk model

The Journal of Wildlife Management, Volume 90, Issue 4, May 2026.
Domestic dogs attack and severely injure wild desert tortoises at the urban and ex‐urban interface with deserts. Severe trauma to tortoises increased 4 times to shell and limbs and 16.5 times to the gular horn over the decades between the 1970s and 2000s. Tortoises were at exponential risk of severe trauma when living within 12 km of settlements, towns,
Andrea S. Carlson, Kristin H. Berry, Jeremy S. Mack   +2 more
wiley   +1 more source