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Desert Tortoise Council 4 UTAH THE I DESERT TORTOISE COUNCIL ARIZONA NEVADA p$ ~Pi" oc 6 gf ((i ' . • (' ) g) • . ~ + 't g ~ bg fj vv • • • 0 sa 'R ~o + / j r v S UXAHNt h a s. > ~p ./ I CALIFORNIA 4 PROCEEDINGS OF 1980 SYMPOSIUM Th< "e i "-" c' ~~" -"'--' i r"""--"-rf -t tI-fg ~c i e)lard . ~ .[ I>glib,~~ s,,"„;..I:.,; ar,i~ i;..„.l; ) i4 , . ..,n r~s,~ solely with the authors and not with the Desert Tortoise Councit. D ESERT TORTOISE CO U N C I L PROCEEDINC>S OF 1980 SYMPOS IUM compilation of reports and papers presented at the fifth annual symposium of the Desert Tortoise Council, 22-2A March 1980, in Riverside, California DESERT TORTOISE CO U N C IL Co-Chairmen: D avid W. S t e v e n s Southern California Edison Company Frank Hoover C alifornia Department of F is h an d G a m e S ecret ar y : Eve lyn St . Amant C alifornia Department of F ish an d G a m e Recordi n g S e c r e t a r y : L or i L . Ni c h o l s o n T reasur e r : Mary T r o t t e r Desert Tortoise Pr e serve Co m m i t te e Editorial Committee E dit o r : K. A . H a s h a g en Cover d e s i g n : Suzanne A l l an O ther d r a w i n g s : R obert K i r w a y M aggie S t e v e n s TABLE OF CONTENTS Page Desert Tortoise Council Ezecuti ve Gommit tee Brief History of Desert Tortoise Council Executi ve Committee Fifth Annual Meeting and Symposium (1980) Excerpts from Business Meeting List of Attendees Field Trip to Chuckwalla Bench, Riverside County, California, Loz i N i ch o'Lson 10 Annual A w ar d. Davi d S t e v e n s 12 Ke note Address: Th e Desert Tortoise -- A t t h e C r os s r o a d s Eugene V. Tof f o 'Li 13 State and Federal Status Reports ARIZONA Bureau of Land Mana ement: St a tus of the Arizona Beaver Dam Slope Population of Desert Tortoises, George P, She p p a z d 23 Bureau of Land Mana ement: Ma n agement of Desert Tortoise Habitat on the Arizona Strip, B i 77y B. T e mp l e t o n Survey of t h e Pr e s e n t Di s t r i but i on of t h e De s er t Tortoise, Gopherus a g a s s izi, in A r i z on a: Add it i o n a l Data, 1 9 7 9 , Bet t y L . Buz ge 36 C ALI F O R N I A Bureau of Land Mana ement, Kristin H. Bezzy 61 De artment of F ish an d G a me , J'ames A. St. A m a n t ­ 68 Page Cali fornia Turtle and Tortoise Clubs, Maz tha Young---­ 70 Desert Tortoise Preserve Committee, Laur a Stockton — -­ 72 NEVADA Bureau of Land Mana ement: Di s tribution and Relative Densities of the Desert Tortoise in Nevada, ALice Ka r L 75 Department of Pish and Game, Robert J. Turner--------­ UTAH Bureau of Land Mana ement, Robert Douglas Federal Protection for North American Tortoises: an Update , C . Kenn e t h Do d d, J r . 93 T he Nat ur e C o n s e r v a n c , J u d y S u r f l e e t ~Pa ers Normal Values for Hemogram and Serum Chemistry 'n the California Desert Tortoise, Gophezus agassizi, Mal ter O'. Ross kop f 100 Overview of the Desert Tortoise, Gophezus agassizi, Ethnozoology, Dav id R. M. V h i te a nd D a v id V. St e v e n s ­­ Impact of Military Activities on the Desert Tortoise at the Moj ave "B" Ranges, Lori L. Nichol son, Michael O'Far zeLl and J'ohn F. Vestermeiez 109 Recovery of Soils and Vegetation in a Mojave Desert host T o wn , N e v a da, Ro b e rt H. web b an d Ho n rard G, Vi Lshi r e 117 The Effect of Off-road Vehicle Noise on Three Species of Desert Vertebrates, B a yard H. B r a t t s tz'om and Michae l C. Bo n d e L l,o 136 The Potential Impa cts of th e D r aft C a l i fornia De s e rt Plan on the Desert Tortoise in the California Desert Conservation Area, Kristin H. Ber zy 137 Report o f the August Trip to the Mapimi Biosphere Reserve, Durango, Mexico, Kristin H. Berr y 138 Page Activity Population Structure and Thermoregulation of Bolson Tortoises, David J. Morafka, Gustavo Aguirre Leon, Michael Recht and Gary Adest 141 A Behavioral Study of Captive Bolson Tortoises, Gopherus f7avomarginatus, at the Research Ranch, Elgin, Arizona, Jan F 7 'Len Bi c ke t t 143 Bolson Hatchlings at the Research Ranch, Elgin, Arizona, Ari el Appleton 146 A Method for Determination of Population Structure and Density of the Desert Tortoise, Timothy A. Shields-­--- - 151 A Comparison of Three Methods of Population Analysis of the Desert Tortoise, Gopherus agassizi, Paul B. S ch n e i d e r 156 A Brief Update on the Caltrans Fence-Culvert Feasibility Study, Margaret Fusaz'i, Stephen M. J'uarez, Glenn ­ ­ ­ Stewart an d Jo h n A. E de 77 ­ ­ ­ ­ ­ ­ ­ 163 Tortoise Populations on the Second Community of California City, Lori L. Nicholson, John F. Vestermeier and Mi c h a el J. O ' F a r reE L 165 Baseline Study of the Desert Tortoise, Gophezus agassi zi, at the Interpretive Center Site, Desert Tortoise Natural Area, Jan Ellen Bickett Desert Tortoise Council Publications Available 178 Membership Application 179 P • I • pW~ I r ­ V 41 1'i +pl .or., f. / pp /g p THE DESERT TORTOISE COUNCIL EXECUTIVE COMMITTEE The goal of the Desert Tortoise Council is to assure the continued survival of viable populations of the desert tortoise, Gopherus agaseisi, throughout its existing range. The ob)ectives of the Counc11 are: d! 1. To serve in a professional advisory manner, where appropriate, on matters involving management, conservation and protect)on of desert tortoises. 2. To support such measures as shall work to insure the continued survival of desert tortoises and the maintenance of their habitat in a natural state. 3. To stimulate and encourage studies on the status and on all phases of life history, biology, physiology, management and protection of desert tortoises, in­ cluding studies of native and exotic species that may affect desert tortoise populations. 4. To provide a clearinghouse of information among all agencies, organizations and individuals engaged in work on desert tortoises. 5. To disseminate current information by publishing proceedings of meetings and other papers as deemed u sefu l . 6. To maintain an active public information and conservation e ducat i o n pr og r a m . 7. To commend outstanding action and dedication by indivi­ duals and organizations fostering the obgectives of t he Coun c i l . BRIEF HISTORY OF DESERT TORTOISE COUNCIL EXECUTIVE COMMITTEE In 1974, members of h e Prohibited and Protected Fishes, Amphibians and Reptiles Committee of the Colorado River >wild­ life Council created an interim Four States' Recovery Team to lend a helping hand to the desert tortoise, Gopherus agassizi. Interest and concern for the tortoise soon outgrew the scope of the Team; subsequently, on 21 April 1975, its members formally organized the Desert Tortoise Council. The Council continues to advance toward its goal of assuring the maintenance of viable populations of the desert tortoise throughout the tortoise's range in California, Ari­ zona, Nevada and Utah. T o this end, the Council has effectively combined efforts of state and federal agencies, academic institutions, museums, zoos, turtle and tortoise clubs, and concerned c i t i zen s . Each year, starting in 1976, the Council has held an annual symposium within the Southwest. E ach of the symposium proceed­ ings have been published, and more than 200 copies have been mailed gratuitously to select libraries throughout the United States. The reports and scientific papers contained in these publications are a testimonial to the Council's success in carrying out its intended functions, as well as a reminder that much remains to be done. FIFTH ANNUAL f'KETING AND SYMPOSIUM The fifth Annual Meeting and Symposium was held 22-24 M arch 1980 at the Holiday Inn, Riverside, California. T h e field trip was to the Chuckwalla Bench Area, Riverside County, California. The Symposium was opened by the program chairman, Dr. Mark Dimmitt, followed by the keynote address by Mr. Eugene V. Toffoli, Deputy Director, California Department of Fish and Game. An informative and entertaining after dinner program was provided by Dr. Howard G. Wilshire and John Nakata. T h is v as a multiple slide/sound presentation entitled, " The Wheele d L o c u s t s " . Excerpts from the Minutes of the Fifth Annual Business Meeting The Desert Tortoise Council agreed on three major objectives for the coming year: l. Ut ah Beaver Dam Slope Tortoise Po ulation Mana ement; he data received from the Bureau of Land Management in Utah will be analyzed and a report of comments s ubmitted to the U.S.
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