Assessing age in the desert tortoise Gopherus agassizii: testing skeletochronology with individuals of known age
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Mycoplasma agassizii in Morafka's desert tortoise (Gopherus morafkai) in Mexico.
We conducted health evaluations of 69 wild and 22 captive Morafka's desert tortoises (Gopherus morafkai) in Mexico between 2005 and 2008. The wild tortoises were from 11 sites in the states of Sonora and Sinaloa, and the captive tortoises were from the state-managed Centro Ecológico de Sonora Zoo in Hermosillo and a private residence in the town of Alamos. We tested 88 tortoises for mycoplasmal...
متن کاملIs Gopherus agassizii a Desert-Adapted Tortoise, or an Exaptive Opportunist? Implications for Tortoise Conservation
– The desert tortoise (Gopherus agassizii) has traditionally been viewed as an archetypal desert-adapted vertebrate. However, evidence from historical ecology, phylogenetics, anatomy, physiology, and biogeography qualifies this view significantly. Ancestors of G. agassizii stabilized as an essentially modern morph some 17-19 million yrs ago ago, perhaps 12 million yrs before the formation of ma...
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Pratha Sah∗1, Kenneth E. Nussear2, Todd C. Esque3, Christina M. Aiello3, 4, Peter J. Hudson4 and Shweta Bansal1, 5 1Department of Biology, Georgetown University, Washington DC, USA 2Department of Geography, University of Nevada Reno, Reno, NV, USA 3U. S. Geological Survey, Western Ecological Research Center, Las Vegas Field Station, Henderson, NV, USA 4Department of Biology, Pennsylvania State ...
متن کاملThe desert tortoise trichotomy: Mexico hosts a third, new sister-species of tortoise in the Gopherus morafkai–G. agassizii group
Desert tortoises (Testudines; Testudinidae; Gopherus agassizii group) have an extensive distribution throughout the Mojave, Colorado, and Sonoran desert regions. Not surprisingly, they exhibit a tremendous amount of ecological, behavioral, morphological and genetic variation. Gopherus agassizii was considered a single species for almost 150 years but recently the species was split into the nomi...
متن کاملAccuracy and reliability of dogs in surveying for desert tortoise (Gopherus agassizii).
The desert tortoise (Gopherus agassizii) is federally listed as "threatened" and is afforded protection in several U.S. states including California, Nevada, Utah, and Arizona. Numerous factors ranging from habitat destruction to disease are thought to contribute to the species' decline throughout its range. Data collection on desert tortoises in the wild is challenging because tortoises are sec...
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ژورنال
عنوان ژورنال: Endangered Species Research
سال: 2008
ISSN: 1863-5407,1613-4796
DOI: 10.3354/esr00108