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Publications

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Author(s)YearTitleJournal
Christiansen, J. L., Elliott Jacobson, and Travis LaDuc. (app 2017) An Algae mediated shell disease of Yellow Mud Turtles , Kinosternon flavescens, confirmed. To be determined
Sethuraman, A., S. E. McGaugh, M. L. Becker, C. H. Chandler, J. L. Christiansen, S. Hayden, A. LeClere, J. Monson-Miller, E. M. Myers, R. T. Paitz, J. M. Refsnider, T. VanDeWalle, and F. J. Janzen. 2014 Population genetics of Blanding's Turtle (Emys blandingii) in the Midwestern United States. Conservation Genetics 15:61-73.
Christiansen, J. L., N.B. Bernstein, C.A. Phillips., J. T. Briggler, and D. Kangas. 2012 Declining populations of Yellow Mud Turtles (Kinosternon flavescens) in Iowa, Illinois, and Missouri.. Southwestern Naturalist 57:304-313.
Christiansen, J.L. and N.P. Bernstein.. 2011 Response of a yellow mud turtle (Kinosternon flavescens Agassiz) community to habitat change: management implications for a nature preserve. Natural Areas Journal 31(4):414-419.
Pierce, B. A., J. L. Christiansen, A. L. Ritzer, and T. A. Jones. 2010Ecology of Georgetown Salamanders (Eurycea naufragia) within the flow of a spring. Southwestern Naturalist 55(2):291-297.
Christiansen, J.L. and R. Woolheater.2008 Hemidactylus turcicus turcicus (Mediterranean Gecko). USA: Texas. Herpetological Review 39(1):109.
Christiansen, J.L. J.M. Grzybowski and E. Jacobson. 2008 Sistrurus catenatus catenatus (Eastern Massasauga). Leiomyoma. Herpetological Review 39(3)358-359.
Christiansen, J.L.2006Opheodrys aestevus (Rough Greensnake), USA, Texas: Williamson Co. Geographis DistributionHerpetological Review 43(4):499-500
Johnson J.C., S.A. Nettikadan, S.G. Vengasandra, S. Lovan, J. Muys, E. Henderson, and J. L. Christiansen. 2005 Characterization of Testudine Melanomacrophages Linear, Membrane Extension Processes - Cablepodia - by Phase and Atomic Force Microscopy. VitroCell. Dev. Biol.-Animal. 41:225-231.
Christiansen, J.L., Paul W. Frese, and Jeffrey Parmelee. 2005 Status of The Timber Rattlesnake. "Iowa" chapter. In Press.
Christiansen, J.L. Tyler Schwiesow, and J.C. Johnson. 2005 A refined method for culturing reptilian cells with comments on aggregations of reptilian melanomacrophages. Herpetological Review. 36(3):279-281.
Christiansen, J.L., J.M. Grzybowski, and B.P. Rinner 2005 Facial Cysts in Turtles, Observations on Incidence, Reoccurrance, and Possible Multiple Origins. J. Herpetology, 39(2):293-298.
Christiansen J.L. and J.R. Parmelee J.E. 2003 A key to the Eggs and Nests of Iowa's Turtles. J. of Iowa Academy Science. 110:44-50.
Christiansen J.L. and J. Leclere 2002 Nerodia erithrogaster neglecta in Iowa with comments on ontogenesis of color and pattern. Herpetological Review. 33(2):152-154.
J.L. Christiansen. 2001 Non-Native Amphibians and Reptiles in Iowa. In Symposium on Invasive Species. J. Iowa Acad. Sci. 108(4):201-211
Oberfoell, C.M. and J.L. Christiansen. 2001 Identification and Distribution of the Gray treefrogs Hyla versicolor and Hyla chrysoscelis in Iowa. J. Ia. Acad. Sci. 108(1) 7 pp.
Christiansen, J.L. and T. VanDeWalle. 2000 Effectiveness of three trap types in drift fence surveys. Herpetological Review., December 2000.
Christiansen, J. L. and H. A. Feltman. 2000 A relationship between trematode metacercaria and frog limb abnormalities. Declining Amphibian Symposium Issue, J. Ia Acad Sci. 107(3):
Christiansen, J.L. and J. G. Grzybowski. 1999 The Biology of Aging, an Introduction to the Medical Problems of Later Life. 2000 edition. McGraw-Hill. 400pp.
Johnson, J.C., T.Schwiesow, A.K. Ekwall, and J.L.Christiansen. 1999 Reptilian Melanomacrophages function under conditions of hypothermia; observations on phagocytic behavior. Pigment Cell Research. 10(4).
Sutton, C.K. and J.L. Christiansen 1999. The habitat and distribution of the stinkpot, Sternotherus odoratus, in Iowa. J. Iowa Acad. Sci. 106(3):63-65.
Rund, C.R., J.L. Christiansen, and J.C. Johnson. 1998 In vitro culture of melanomacrophages from the spleen and liver of turtles; comments on melanomacrophage morphology. Pigment Cell Research 11:114-119.
Christiansen, J.L. 1998 Perspectives on Iowa's Amphibians and Reptiles. J. Iowa Acad. Sci. 105(3):109-114.
Christiansen, J. L. and R. M. Bailey. 1997 The Lizards and Turtles of Iowa. Iowa DNR, Nongame Technical Series (3):1-20. Revised May 1977
Christiansen, J. L., J. M. Grzybowski, and R. O. Kodama. 1996 Melanomacrophage Aggregations and their age relationships in the yellow mud turtle, Kinosternon flavescens (Kinosternidae). Pigment Cell Research 9(4):1-6.
VanDeWalle, T. and J. L. Christiansen. 1996 A relationship between river modification and species richness of fresh water turtles in Iowa. J. Iowa Acad. Sci. 103(1-2):1-8.
VanDeWalle, T, C.. Sutton, and J.L. Christiansen. 1996 Pseudacris crucifer : an Iowa case history study of an amphibian call survey. Herpetological Review 27(4):183-185.
Bailey, R. M. and J. L. Christiansen. 1993 The early history and recent trends in Iowa Herpetology. J. Iowa Acad. Sci. 100(3):83-86.
Christiansen, J. and J. Fieselmann. 1993 Massasauga Rattlesnake Bites in Iowa. Iowa Medicine 1993:187-191.
Christiansen, J.L. and Grzybowski, J.M. 1992 The Biology of Aging, (a Biomedical Approach), Mosby,.400pp.
Mabry, C. M. and J. L. Christiansen. 1991 The activity and breeding cycle of Scaphiopus bombifrons in Iowa. J. Herpetology. 25(1):116-119.
Christiansen, J. L. and R. M. Bailey. 1991 The salamanders and frogs of Iowa. The Iowa Department of Natural Resources, Nongame Tech. Series (4): 1-21.
Christiansen, J. L. and R. M. Bailey. 1990 The snakes of Iowa (revised). The Iowa Department of Natural Resources, Nongame Tech. Series.(1):1-16.
Christiansen, J.L., B.J. Gallaway, and J.W. Bickham. 1990. Population estimates and geographic distribution of the yellow mud turtle (Kinosternon flavescens) in Iowa. J. Iowa Acad. Sci. 97(3):105-109.
Christiansen, J. L. and B. J. Gallaway. 1989 Possible historic effects of pond drying and winterkill on the behavior of Kinosternon flavescens and Chrysemys picta. Journal Herpetology 23(1):91-94.
Christiansen, J. L. and R. M. Bailey. 1988 The Lizards and Turtles of Iowa. The Iowa Department of Natural Resources. Special Publ. December. 20 19 pp.
Christiansen, J. L. 1986 The Snakes of Iowa. Special Publ. Iowa Conservation Commission 1986: 1-15.
Christiansen, J.L. and C.M. Mabry. 1985 The amphibians and reptiles of Iowa's Loess Hills. Proc. Ia. Acad. Sci. 92(5):159-163.
Christiansen, J.L. and J.A. Cooper, J.W. Bickham, B.J. Galloway, and M.D. Springer. 1984 Aspects of the natural history of the yellow mud turtle (Kinosternon flavescens) in Iowa: A proposed endangered species. Southwestern Naturalist 30(3):413-425.
Christiansen, J.L. and B.J. Galloway. 1984 Raccoon removal, nesting success, and hatchlings in Iowa turtles with special reference to Kinosternon flavescens. Southwestern Naturalist 29(3):343-348.
Christiansen, J.L., J.A. Cooper, and J. Bickham. 1984 Reproduction of Kinosternon flavescens in Iowa. Southwestern Naturalist 29(3):349-351.
Wacha, R.S. and J.L. Christiansen. 1982 Development of Caryospora bigentica N. sp. (Acomplexa, Eimeriidae) in rattlesnakes and laboratory mice. J. Protozoology 29(2):272-276.
Bowles, J., J.L. Christiansen, D. Lampe, and P. Meglitsch. 1982 Iowa's Wildlife. Chapter in Iowa's Natural Heritage, pp. 250-265.
Williams, T.A. and J.L. Christiansen. 1981 The Niches of Two Sympatric Softshell Turtles, Trionyx muticus and T. spiniferus in Iowa. J. Herpetology, 15(3):303-308.
Christiansen, J.L. and R.R. Burken. 1979 Growth and maturity of the snapping turtle (Chelydra serpentina) in Iowa. Herpetologica 35(3):251-166.
Wacha, R.S. and J.L. Christiansen. 1979 Eimeria filamentifera sp. n. from the Snapping Turtle Chelydra serpentina (Linne) in Iowa. J. Protozool. 26(3):353-354.
Christiansen, J.L. and R.R. Burken. 1978 The endangered and uncommon amphibians and reptiles of Iowa. Special Edition, Iowa Science Teachers Journal (sponsored and funded by Iowa Conservation Commission)
Christiansen, J.L. and R.C. Sanz. 1978 A notable range extension for the Plains Pocket Mouse Perognathus flavescens perniger Osgood, in Iowa. Proc. Iowa Acad. Sci.
Wacha, R.S. and J.L. Christiansen. 1977 Additional notes on the coccidian parasites of the soft shell turtle Trionyx spiniferus LeSueur, with a description of Eimeria vesicosteida sp. m. J. Protozoology, 24(3):357-359.
Wacha, R.S. and J.L. Christiansen. 1976 Coccidian Parasites from Iowa Turtles: Sytematics and Prevalence. J. Protozoology, 23(1):57-63.
Johnson, B.K. and J.L. Christiansen. 1976 The Food and Food Habits of Blanchard's Cricket Frog, Acris crepitans blancharidi (Amphibia, Anura, Hylidae). J. Herpetology, 10(2):63-74.
Wacha, R.S. and J.L. Christiansen. 1975 Two New Eimerians from Colubrid Snakes in Iowa. J. Protozool., 22(4):453-454.
Wacha, R.S. and J.L. Christiansen. 1974 Systematics of the Eimerian Parasites from North American Snakes of the Family Colubridae and their prevalence in the Colubrids of Iowa. J. Protozoology, 21(4):483-489.
Wacha, R.S. and J.L. Christiansen. 1974 Eimeria megalostedaie sp.n. (Protozoa:Eimeriidae) from the wood turtle Clemmys insculpata in Iowa. Proc. Helmenth. Soc. Wash., 41(1):35-37.
Degenhardt, W.G. and J.L. Christiansen. 1974 Distribution and habitats of the turtles of New Mexico. Southwestern Naturalist, 19(1):21-46.
Christiansen, J.L. 1973 The Distribution and Variation of the Western Earth Snake Virginia valeriae elegans (Kennicott) in Iowa. Proc. Iowa Acad. Sci., 80:167-170.
Christiansen, J.L. 1973 Natural and artificially induced oviducal and ovarian growth in two species of Cnemidophorus (Sauria:Teiidae). Herpetologica, 29(3):195-204.
Christiansen, J.L. and E.O. Moll. 1973 Latitudinal reproductive variation within a single subspecies of painted turtle, Chrysemys picta belli. Herpetologica, 29(2):152-163.
Christiansen, J.L. and A.E. Dunham. 1972 Reproduction of the yellow mud turtle (Kinosternon flavescens flavescens) in New Mexico. Herpetologica, 23(2):130-137.
Christiansen, J.L. and A.J. Quinn. 1972 The relationship between pond bottom type and growth rate of western painted turtles Chrysemys picta belli in Iowa, a preliminary report. Iowa Acad. Sci., 73(3-4):67-69.
Christiansen, J.L. 1971 Reproduction of Cnemidophorus inornatus and C. neomexicanus in northern New Mexico. American Museum Novitates, (2442):48.
Christiansen, J.L., W.G. Degenhardt, and J.E. White. 1971 Habitat preferences of Cnemidophorus inornatus and C. neomexicanus with special reference to conditions contributing to their hybridization. Copeia, (2):357-359.
Christiansen, J.L. 1969. Notes on hibernation in Cnemidophorus inorantus and C. neomexicanus (Sauria:Teiidae). J. of Herpetology, 3(1-2):99-100.
Christiansen, J.L. and W.G. Degenhardt. 1969 An unusual individual of Cnemidophorus gularis (Sauria:Teiidae) from New Mexico. Texas J. Sci., 21(1):95-97.
Christiansen, J.L. and A.J. Ladman. 1968 The reproductive morphology of Cnemidophorus neomexicanus and Cnemidophorus inornatus hybrid males. J. Morph., 125(3):367-378.
Christiansen, J.L. 1968 Age at sexual maturity and the annual cycle of spermatogenesis in the male lizard, Cnemidophorus inornatus (Squamata:Teiidae). Anat. Rec., 160(2):163.
Christiansen, J.L. 1962 A survey of reptiles and amphibians of Buena Vista County, Iowa. Iowa Acad. Sci., 625-634.

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