. Brigham Young University science bulletin. Biology -- Periodicals. Brigham VouNr. University Scienoe Bulletin (1955) Studied tlie reproductive cycle, habitat, and growth of S. undulntus; Carpenter (1959) studied population dynamics. Crisp (1964a and 1964b) examined the female and male reproduc- tive cycles in S. ct/anogenijs. Zweifel (1949), Carpenter (I960)," and Goldberg (1970a, 1970b, and 1971) studied ovoviviparitv, parturi- tion and behavior, and histology of the repro- ductive cycle, respectixclv, in S. jarrovi. Method- ology and understanding of S. <^. (iasus have been e
. Brigham Young University science bulletin. Biology -- Periodicals. Brigham VouNr. University Scienoe Bulletin (1955) Studied tlie reproductive cycle, habitat, and growth of S. undulntus; Carpenter (1959) studied population dynamics. Crisp (1964a and 1964b) examined the female and male reproduc- tive cycles in S. ct/anogenijs. Zweifel (1949), Carpenter (I960)," and Goldberg (1970a, 1970b, and 1971) studied ovoviviparitv, parturi- tion and behavior, and histology of the repro- ductive cycle, respectixclv, in S. jarrovi. Method- ology and understanding of S. <^. (iasus have been enhanced by these studies. MATERIALS AND METHODS Field work was started in the spring of 1970 on a study plot at the eastern edge of the Brig- ham Young University farm, southeast of Spanish Fork, Utah. The plot is hi-ctares set with rows of stakes at right angles, each stake being m from other stakes. At the base of each stake a can trap was buried fliLsh with the ground level as explained bv Tanner and Hopkin (1972). The elevation of the stud\ plot lies between 1,493 and 1,554 m. Tlie shjpe is approximately 40 degrees, facing west and containing a dr\ wash (Fig. 1 and 2A-B). The wash creates north- and south-facing slopes within the plot. The substratum on the south-facing slope was developed from a large talus slope which is light in color and of a fine gravelly nature. Small rocky outcroppings and large solitary boulders occur on both slopes of the wash. The area soutli of the wash (north-facing slope and southern end of plot) has a more humus soil but is still rocky and has a surface covering of small gravel in some areas. Two davs of each week were devcjted to checking traps and two to noosing and return- ing lizards to the place of capture. Each lizard Rock Ledge 'y°°fj'-. Ook-Maple. North Top of Wash NE Side of plot Bottom of Wash Top of Wash SW Side of plot ⢠« o 0 Fig. 1. Outline i)t stiuK plot with doininaiit \ (â â¢^(â talioii and topograph)
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