Great Basin Naturalist Volume 58 Number 4 Article 7 10-12-1998 Comparative demography of the high-altitude lizard, Sceloporus grammicus (Phrynosomatidae), on the Iztaccihuatl Volcano, Puebla, México Julio A. Lemos-Espinal Proyecto Fauna Silvestre, CENID-COMEF/SARH, Viveros de Coyoacan, Mexico Royce E. Ballinger University of Nebraska–Lincoln, Lincoln Geoffrey R. Smith William Jewell College, Liberty, Missouri Follow this and additional works at: https://scholarsarchive.byu.edu/gbn Recommended Citation Lemos-Espinal, Julio A.; Ballinger, Royce E.; and Smith, Geoffrey R. (1998) "Comparative demography of the high-altitude lizard, Sceloporus grammicus (Phrynosomatidae), on the Iztaccihuatl Volcano, Puebla, México," Great Basin Naturalist: Vol. 58 : No. 4 , Article 7. Available at: https://scholarsarchive.byu.edu/gbn/vol58/iss4/7 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Great Basin Naturalist by an authorized editor of BYU ScholarsArchive. For more information, please contact
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[email protected]. Creat Ba....in Natur.uist 58(4), €:I 1998. pp. 375-379 COMPARATIVE DEMOGRAPHY OF THE HIGH-ALTITUDE LIZARD, SCEWPORUS GRAMMICUS (PHRYNOSOMATIDAE),, ON THE IZTACCIHUATL VOLCANO, PUEBLA, MEXICO Julio A. Lemos-Espinall , Royce E. Ballinger2, and Geoffrey R. Smith3 ABSTRACT.-Population density, reproduction, and survivorship were compared between 2 populations of Sctdoporu5' gra.rll7nicus occurring at different altitudes (3700 m and 4400 m) on the eastern slopes of l:ttaceihuatl Volcano. Puehla, Mbdco. Lizards in both populatloM matured at the same l:lge (14-15 mon) and size (39--42 mm SLY). Population density was slightly greater at high altitude (131-163 per ha) than at low altitude (52-83 per ha).