Patton, M.L., P.T. Wegener, N.C. Pratt, B.S. Durrant. 1994. Correlations of ATP concentration with traditional sperm viability tests in the cheetah. Biology of Reproduction 50. 77.

Pratt, N.C., B.S. Patton, B.S Durrant, S. Barlow. 1994. Verification of the Coomassie acrosome stain with transmission electron microscopy. Biology of Reproduction 50. 105.

Pratt, N.C., J.A. Phillips, A.C. Alberts, K.S. Bolda. 1994. Functional versus physiological puberty: An analysis of sexual bimaturism in the green iguana, Iguana iguana. Animal Behaviour 47. 1101-1114.

Rostal, D.C., V.A. Lance, J. Grumbles, A.C. Alberts. 1994. Seasonal reproductive cycle of the desert tortoise (Gopherus agassizii) in the eastern Mojave desert. Herpetological Monographs 8. 72-82.

Ryder, O.A. 1994. Ex situ conservation and the conservation role of zoological parks and aquariums . Pages 175-178 in Principles of Conservation Biology . Edited by G.K. Meffe, and C.R. Carroll. Sinauer Associates, Sunderland, Massachusetts.

Ryder, O.A. 1994. Genetic studies of Przewalski’s horses and their impact on conservation . Pages 75-92 in Przewalski’s horse: The History and Biology Of An Endangered Species . Edited by L. Boyd, and K. Houpt. State University of New York Press, Albany, New York.

Schiewe, M.C., N.M. Loskutoff, B.S. Durrant, L.A. Johnston, D.L. Armstrong, L.G. Simmons. 1994. Gaur sperm cryopreservation trial:  Analysis of packaging type and rapid freezing method for potential field application. Theriogenology 41. 291.

Toone, W.D., M.P. Wallace. 1994. The Extinction in the Wild and Reintroduction of the California Condor (Gymnogyps Californianus). . Pages 411-419 in Creative Conservation. Edited by P.J.S. Olney, G.M. Mace, and A.T.C. Feistner. Springer, Dordrecht, Netherlands.

Váhala, J., V. Kaše, O.A. Ryder. 1994. Haematological and Biochemical Values or the Blood and Blood Serum of Captive Northern White Rhinoceroses (Ceratotherium simum cottoni). Acta Veterinaria Brno 63. 99-102.

Wallace, M.P. 1994. The Control of Behavioral Development in the Context of Reintroduction Programs in Birds. Zoo Biology 13. 491-499.

Wallace, M.P., M. Fuller, J. Wiley. 1994. Patagial Transmitters for Large Vultures and Condors. Raptor Conservation Today . Edited by B.U. Meyburg, and R.D. Chancellor. World Working Group on Birds of Prey, Berlin, Germany.

Zhang, Y.-P., O.A. Ryder. 1994. Phylogenetic relationships of bears (the Ursidae) inferred from mitochondrial DNA sequences . Molecular Phylogenetics and Evolution  3. 351-359.

Zhang, Y.-P., O.A. Ryder, Q.-G. Zhao, Z.-Y. Fan, G.-X. He, A.-J. Zhang, H.-M. Zhang, T.-M. He, C. Yucun. 1994. Non-invasive giant panda paternity exclusion . Zoo Biology 13. 569-573.

Alberts, A.C., D.I. Werner. 1993. Chemical recognition of unfamiliar conspecifics by green iguanas: Functional significance of different signal components. Animal Behaviour 46. 197-199.

Alberts, A.C., J.A. Phillips, D.I. Werner. 1993. Sources of intraspecific variability in the protein composition of lizard femoral gland secretions. Copeia 1993. 775-781.

Alberts, A.C. 1993. Relationship of space use to population density in an herbivorous lizard. Herpetologica 49. 469-479.

Alberts, A.C. 1993. Chemical and behavioral studies of femoral gland secretions in iguanid lizards. Brain, Behavior, and Evolution 41. 255-260.

Alberts, A.C., A.D. Richman, D. Tran, R. Sauvajot, C. McCalvin, D.T. Bolger. 1993. Effects of habitat fragmentation on populations of native and exotic plants in southern California coastal scrub. Pages 103-110 in Interface Between Ecology and Land Development in California. Edited by J.E. Keeley. Southern California Academy of Sciences, Los Angeles, California.

Cooper, Jr., W.E., A.C. Alberts. 1993. Postbite elevation in tongue-flicking rate by an iguanian lizard, Dipsosaurus dorsalis. Journal of Chemical Ecology 19. 2329-2336.

Durrant, B.S., N.C. Pratt, J.K. Yamada. 1993. Superior cryosurvival of cheetah sperm with moderate motility. Journal of Andrology 37.

Durrant, B.S., M.L. Patton, N.C. Pratt. 1993. Enzymatic ovary digestion and isolation of preantral follicles in the domestic dog. . Biology of Reporduction 48. 124.

Geyer, C.J., O.A. Ryder, L.G. Chemnick, E.A. Thompson. 1993. Analysis of relatedness in the California condors, from DNA fingerprints . Molecular Biology and Evolution 10. 571-589.

Jama, M.A., Y. Zhang, O.A. Ryder. 1993. Sequence of the mitochondrial control region, tRNAThr, tRNAPro and tRNAPhe genes from the black rhinoceros, Diceros bicornis. Nucleic Acids Research 21. 4392.

Lindburg, D.L., B.S. Durrant, S.E. Millard, J.E. Oosterhuis. 1993. Fertility assessment of cheetah males with poor quality semen. Zoo Biology 12. 97-103.

Longmire, J.L., M. Maltbie, L.M. Smith, S.M. Witte, O.A. Ryder, D.L. Ellsworth, R.J. Baker, R.W. Pavelka. 1993. Gender Identification in Birds Using Microsatellite DNA Fingerprint Analysis . Auk 110. 378-381.

Phillips, J.A., A.C. Alberts, N.C. Pratt. 1993. Differential resource use, growth, and the ontogeny of social relationships in the green iguana. Physiology and Behavior 53. 81-88.

Pratt, N.C., M.L. Patton, B.S. Durrant. 1993. Acrosome reaction in frozen-thawed semen samples determined by Coomassie staining. Biology of Reproduction 46. 94.

Pratt, N.C., M.L. Patton, B.S. Durrant. 1993. Timing of in vitro sperm capacitation and acrosome reaction in the domestic dog. Biology of Reproduction 105.

Ryder, O.A. 1993. Przewalski’s Horse: Prospects for reintroduction into the wild . Conservation Biology 7. 13-15.

Ryder, O.A., L.G. Chemnick. 1993. Chromosomal and mitochondrial DNA variation in orangutans. Journal of Heredity 84. 405-409.

Zhang, Y., O.A. Ryder. 1993. Mitochondrial DNA sequence evolution in the Arctoidea . Proceedings of the National Academy of Sciences of the United States of America 90. 9557-9561.

Alberts, A.C., T.R. Sharp, D.I. Werner, P.J. Weldon. 1992. Seasonal variation of lipids in the femoral gland secretions of male green iguanas (Iguana iguana). Journal of Chemical Ecology 18. 703-712.

Alberts, A.C., N.C. Pratt, J.A. Phillips. 1992. Seasonal productivity of lizard femoral glands: Relationship to social dominance and androgen levels. Physiology and Behavior 51. 729-733.

Alberts, A.C. 1992. Pheromonal self-recognition in desert iguanas. Copeia 1992. 229-232.

Alberts, A.C. 1992. Density dependent scent gland activity in desert iguanas. Animal Behaviour 44. 774-776.

Alberts, A.C. 1992. Constraints on the design of chemical communication systems in terrestrial vertebrates. American Naturalist 139. S62-S89.

Biery, K.A., R.A. MacLean, C.R. Looney, B.S. Durrant. 1992.  Penetration of capacitated sperm into the perivitelline space of salt-stored follicular oocytes in the bovine. Theriogenology 37. 193.

Durrant, B.S., K.A. Biery, M.L. Patton, V. Smith. 1992. Effects of pre-freeze citrate exposure, cooling and thaw techniques on the cryosurvival of sperm from domestic and exotic equids. . Journal of Andrology. American Society of Andrology. 17th Annual Meeting Program and Abstracts 71.

Durrant, B.S., M.L. Patton, N.C. Pratt, A. Biery. 1992. Effect of pre-freeze cooling and packaging on cryosurvival of cheetah sperm.  . Biology of Reproduction. 46. 95.

Durrant, B. 1992. Research in zoos and aquariums. Proceedings American Association of Zoo Keepers. 103-106.

Houck, M.L. 1992. Cytogenetic techniques and their application to conservation biology.  Proceedings of the Association of Zoo Veterinary Technicians 12th Annual Meeting 104-106.

Houck, M.L. 1992. Cytogenetic techniques and their application to conservation biology . Pages 104-106 in Proceedings of the Association of Zoo Veterinary Technicians 12th Annual Meeting . Association of Zoo Veterinary Technicians, Yulee, Florida.

Patton, M.L., B.S. Durrant. 1992.  Cryopreservation of germplasm. Proceedings Association of Zoo Veterinary Technicians 108-110.

Phillips, J.A., A.C. Alberts. 1992. Naive ophiophagus lizards recognize and avoid venomous snakes using chemical cues. Journal of Chemical Ecology 18. 1775-1783.

Pratt, N.C., A.C. Alberts, K.M. Fulton-Medler, J.A. Phillips. 1992. Behavioral, physiological, and morphological components of dominance and mate attraction in male green iguanas. Zoo Biology 11. 153-163.

Rideout, B.A., P.F. Moore, N.C. Pedersen. 1992. Persistent Upregulation of MHC Class II Antigen Expression on T-lymphocytes From Cats Experimentally Infected With Feline Immunodeficiency Virus. Veterinary Immunology and Immunopathology 35. 71-81.

Rideout, B.A., L.J. Lowenstine, C.A. Hutson, P.F. Moore, N.C. Pedersen. 1992. Characterization of morphologic changes and lymphocyte subset distribution in lymph nodes from cats with natural feline immunodeficiency virus infection. Veterinary Pathology 29. 391-399.

Ryder, O.A. 1992. DNA investigative technologies: Application to endangered species preservation . Clinical Chemistry 38. 458-459.

Soulé, M.E., A.C. Alberts, D.T. Bolger. 1992. The effects of habitat fragmentation on chaparral plants and vertebrates. Oikos 63. 39-47.

Wallace, M.P., W. Toone. 1992. Captive Management for the Long Term Survival of the California Condor.  . Pages 766-774 in Wildlife 2001: Populations. Edited by K.R. McCullough, and R.H. Barrett. Elsevier Applied Science, London, United Kingdom.

Alberts, A.C. 1991. Phylogenetic and adaptive variation in lizard femoral gland secretions. Copeia 1991. 69-79.

Baldini, A., D. Miller, O. Miller, O.A. Ryder, A. Mitchell. 1991. A chimpanzee-derived chromosome-specific alpha satellite DNA sequence conserved between chimpanzee and human . Chromosoma 100. 156-161.

Barlough, J., C. Ackley, J. George, N. Levy, R. Acevedo, P. Moore, B. Rideout, M. Cooper, N. Pedersen. 1991. Acquired immune dysfunction is cats experimentally infected with FIV: comparison of long and short term infection. Journal of Acquired Immune Deficiency Syndromes 44. 219-227.

Biery, K.A., L.C. Doyle, V.D. Thompson, B.S. Durrant. 1991. Reproductive parameters and seasonality in the koala (Phascolarctos cinereus adustus). American Association of Zoological Parks and Aquariums Annual Conference Proceedings  617.

Biery, K.A., K.G. Osborn, B.S. Durrant. 1991. Anatomy and histology of the reproductive tract of the female Parma wallaby (Macropus parma). American Association of Zoological Parks and Aquariums Annual Conference Proceedings 617.

Bolger, D.T., A.C. Alberts, M.E. Soulé. 1991. Bird species occurrence patterns in habitat fragments: Sampling, extinction, and nested species subsets. American Naturalist 137. 155-166.

Burch, C.D., B.S. Durrant, M.L. Patton, J.I. Harvey. 1991. Hatching of Tragopan pheasants following artificial insemination of refrigerated or frozen semen. American Association of Zoololgical Parks and Aquarium Annual Conference Proceedings 618.

Cooper, Jr., W.E., A.C. Alberts. 1991. Tongue-flicking and biting in response to chemical food stimuli by an iguanid lizard (Dipsosaurus dorsalis) having sealed vomeronasal ducts: Vomerolfaction may mediate these behavioral responses. Journal of Chemical Ecology 17. 135-146.

Czekala, N.M., L. Callison, M. Williams, B. Durrant. 1991. Fecal steroid hormone analysis as an indicator of reproductive function in the cheetah (Acinonyx jubatus). . Biology of Reproduction. 44. 19.

Durrant, B.S, C. Burch. 1991. Successful artificial insemination of cryopreserved pheasant semen. Journal of Andrology. 16th Annual Meeting Program and Abstracts. 13. 56.

Durrant, B.S. 1991. Zoo system inventory management. Wild Cattle Symposium Proceedings 85-86.

Durrant, B.S. 1991. Non-cattle bovid species semen cryopreservation. Wild Cattle Symposium Proceedings 52-55.

Durrant, B.S, T.H. Welsh, E.D. Plotka, L. Johnson. 1991. Effect of testosterone treatment on the antler cycle of an Indian hog deer with low endogenous testosterone levels. Biology of Reproduction. 44. 36.

Durrant, B.S. 1991. Semen collection, evaluation and cryopreservation as a prelude to artificial insemination in exotic species. Society for Theriogenology Proceedings

Durrant, B.S., K.A. Biery, E.W. Falor, S.M. Sutton, R.L. Craven, J.I. Harvey,, V. Smith, M.L. Patton, R.L. Bruce Jr. 1991. Cryopreservation of Przewalski's horse semen:  Effects of pre-freeze citrate exposure, cooling and thaw techniques. Proceedings of American Association of Zoololgical Parks and Aquariums 621.

Durrant, B.S., M.L. Patton. 1991. Semen cryopreservation in exotic bovids. . American Association of Zoololigcal Parks and Aquariums Annual Conference Proceedings 621.

Hutson, C.A., B.A. Rideout, N.C. Pedersen. 1991. Neoplasia associated with feline immunodeficiency virus infection in cats of Southern California. Journal of the American Veterinary Medical Association 199(10). 1357-1362.

Lindburg, D.G., B.S. Durrant, S.E. Millard. 1991. The relationship of sperm quality to fertility in the cheetah (Acinonyx jubatus). American Association of Zoological Parks and Aquariums Annual Conference Proceedings  635.

Morin, P.A., O.A. Ryder. 1991. Founder contribution and pedigree inference in a captive breeding colony of lion-tailed macaques, using mitochondrial DNA and DNA fingerprint analyses . Zoo Biology 10. 341-352.

Pratt, N.C., M.L. Patton, B.S. Durrant. 1991. Coomassie staining as a technique for determination of the acrosome reaction in frozen-thawed semen samples. . American Association of Zoological Parks and Aquariums Annual Conference Proceedings 640.

Rodriguez, Y.A., B.S. Durrant. 1991. Description of the North American scimitar-horned oryx population by analysis of studbook and necropsy reports. American Association of Zoological Parks and Aquariums Annual Conference Proceedings 641.

Ryder, O.A. 1991. International cooperation in species preservation: The Przewalski’s horse reintroduction program . Annual Proceedings of the American Association of Zoological Parks and Aquariums 1991. 391-395.

Wallace, M.P. 1991. Methods and Strategies for Releasing California Condors to the Wild. Pages 121-128 in American Association of Zoological Parks and Aquariums Annual Conference Proceedings. American Association of Zoological Parks and Aquariums, Wheeling, West Virginia/United States of America.

Wichman, H.A., C.T. Payne, O.A. Ryder, M.J. Hamilton, M. Maltbie, R.J. Baker. 1991. Genomic distribution of heterochromatic sequences in equids: Implications to rapid chromosomal evolution . Journal of Heredity 82. 369-377.

Aman, R.A., O.A. Ryder. 1990. Application of advanced research technologies to the conservation and sustainable development of genetic resources. Wildlife Research for Sustainable Development.Proceedings of an International Conference held in Nairobi. Edited by J.G. Grootenhuis, S.G. Njuguna, and P.W. Kat. Kenya Agricultural Research Institute, Kenya Wildlife Services, and National Museums of, Nairobi, Kenya.

Durrant, B.S, J. Yamada, C. Burch. 1990. The value of the sperm penetration assay in assessing sperm function in the cheetah (Acinonyx jubatus). American Society of Andrology. 15th Annual Meeting Program and Abstracts. 11. 25.

Durrant, B. 1990. Semen characteristics of the Przewalski's stallion (Equus przewalskii). Theriogenology 33. 221.

Garner, K.J., O.A. Ryder. 1990. Some applications of PCR to studies in wildlife genetics . Pages 167-181 in : Proceedings of Symposia of the Zoological Society of LondonNo. 64: Biotechnology and the Conservation of Genetic Diversity. Edited by H.D.M. Moore, W.V. Holt, and G.M. Mace. Clarendon Press, Oxford, United Kingdom.

Meyne, J., R.J. Baker, H.H. Hobart, T.C. Hsu, O.A. Ryder, O.G. Ward, J.E. Wiley, D.H. Wurster-Hill, T.L. Yates, R.K. Moyzis. 1990. Distribution of non-telomeric sites of the (TTAGGG)n telomeric sequence in vertebrate chromosomes . Chromosoma 99. 3-10.

Miyamoto, M.M., F. Kraus, O.A. Ryder. 1990. Phylogeny and evolution of antlered deer determined from mitochondrial DNA sequences. Proceedings of the National Academy of Sciences of the United States of America 87. 6127-6131.

Pedersen, N.C., M. Torten, B. Rideout, E. Sparger, T. Tonachini, P.A. Luciw, C. Ackley, N. Levy, J. Yamamoto. 1990. Feline leukemia virus infection as a potentiating cofactor for the primary and secondary stages of experimentally induced feline immunodeficiency virus infection. Journal of Virology 64(2). 598-606.

Pedersen, N.C., M. Torten, B. Rideout, N. Levy. 1990. Asymptomatic feline leukemia carrier status cats have enhanced susceptibility to feline immunodeficiency virus-induced disease. Developments in Biological Standardization 72. 173-184.

Rideout, B.A., P.F. Moore, N.C. Pedersen. 1990. Distribution of MHC class II antigens in feline tissues and peripheral blood. Tissue Antigens 36(5). 221-227.

Ryder, O.A., L.G. Chemnick. 1990. Chromosomal and molecular evolution in Asiatic wild Asses . Genetica 83. 67-72.

Ryder, O.A., R.A. Aman. 1990. Saving species in their habitats: The transfer of genetics research technologies . American Association of Zoological Parks and Aquariums Annual Conference Proceedings 1990. 41-45.

Ryder, O.A. 1990. Transfer of genetics research technology: Examples of cooperation in species conservation in Kenya and Czechoslovakia . International Union of Directors of Zoological GardensScientific Session of the 45th Annual Conference 1990. 165-169.

Ryder, O.A. 1990. Goals of Przewalski’s horse breeding. 5th International Symposium on the Preservation of the Przewalski horse 1992. 105-107.

Ryder, O.A. 1990. Putting the wild horse back in the wild . 5th International Symposium on the Preservation of the Przewalski horse 1992. 328.

Ryder, O.A., W. Zimmermann, A. Bowling. 1990. Report on CMPWG visit to USSR September 28-October 12, 1990 .  5th International Symposium on the Preservation of the Przewalski horse 1992. 332.

Schweigert, F.J., O.A. Ryder, W.A. Rambeck, H. Zucker. 1990. The majority of Vitamin A is transported as retinyl esters in the blood of most carnivores . Comparative Biochemistry and Physiology 95A. 573-578.

Torten, M., E.E. Sparger, B.A. Rideout, N.C. Pedersen, P.A. Luciw. 1990. Coinfection of cats with FIV and FeLV affects both quantity and distribution of FIV DNA in various tissues. Vaccines 90: Modern Approaches to New Vaccines Including Prevention of AIDS. Edited by F. Brown, R.M. Chanock, H.S. Ginsberg, and R.A. Lerner. Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York. 4 pp.

Wallace, M.P., C.S. Asa. 1990. Diet and Activity Pattern of the Sechuran Desert Fox (Dusicyon sechurae). Journal of Mammalogy 71. 69-72.

Zimmermann, W., O.A. Ryder. 1990. Proposal for establishment of a Przewalski’s Horse Working Group 20 May, 1990 . 5th International Symposium on the Preservation of the Przewalski horse 1992. 326.

Garner, K.J., O.A. Ryder. 1989. Assessment of genetic diversity in gorillas by amplification of mitochondrial D-loop DNA. Journal of Cellular Biochemistry. Supplement 13E. 285.

Geyer, C.J., E.A. Thompson, O.A. Ryder. 1989. Gene survival in the Asian wild horse (Equus przewalskii): II. Gene survival in the whole population, in subgroups, and through history. Zoo Biology 8. 313-329.

Merenlender, A.M., D.S. Woodruff, O.A. Ryder, R. Koch, J. Vahala. 1989. Allozyme variation and differentiation in African and Indian rhinoceroses . Journal of Heredity 80. 377-382.

Nobel, S.J., R.K. Chesser, O.A. Ryder. 1989. Inbreeding effects in captive population of ruffed lemurs . Journal of Human Evolution 5. 283-291.

Ryder, O.A., A.T. Kumamoto, B.S. Durrant, K. Benirschke. 1989. Chromosomal divergence and reproductive isolation in dik-diks. . Pages 208-225 in Speciation and Its Consequences . Edited by D. Otte, and J.A. Endler. Sinauer Associates, Sunderland, Massachusetts.

Ryder, O.A., L.G. Chemnick, S.F. Schafer, A.L. Shima. 1989. Individual DNA fingerprints from Galapagos tortoises Geochelone elephantopus  . International Zoo Yearbook 28. 84-87.

Ryder, O.A., R.E. Benveniste, J. Jr. George, L.G. Chemnick, M.L. Houck, A.T. Kumamoto. 1989. Molecular and chromosomal evolution in the mammalian order Perissodactyla . Journal of Cellular Biochemistry. Supplement 13. 104.