Dr. Jean Krejca
Dr. Jean Krejca specializes in karst biology and is a partner in Zara Environmental, LLC. She holds USFWS endangered species permit (TE028652-0).
Dr. Krejca's doctoral research focused on troglobites of Texas and Mexico. B.S. in Zoology. Southern Illinois University with departmental honors for cave sculpin research, May 1995.
RESEARCH INTERESTS:
Cave biology, cave photography, and field guide
Sequoia and King's Canyon National Parks cave biology inventory
Aerial surveys using a powered paraglider
Using aquifer organism genes as a dye tracer in karst
Cave exploration and cartography projects
Cave diving
SELECTED PROFESSIONAL EXPERIENCE:
United States Fish and Wildlife Service: Ecologist/Cave Invertebrate Specialist. Provide technical expertise for maintenance of endangered cave species in Texas. Includes work with landowners and developers regarding compliance with the Endangered Species Act. 11/00-present.
SELECTED PUBLICATIONS:
Taylor, S.J., and J.K. Krejca. 2005. Foraging Range and Habitat Use of Ceuthophilus secretus (Orthoptera: Rhaphidophoridae), a Key Trogloxene in Central Texas Cave Communities. The American Midwest Naturalist, 154:97-114. (available as pdf file [340 kb])
Cokendolpher, J.C., J.R. Reddell, S.J. Taylor, J.K. Krejca, A.V. Suarez, and C.E. Pekins. 2009. Further ants (Hymenoptera: Formicidae) from caves of Texas. Texas Memorial Museum Speleological Monographs, 7.
Shear, W.A., and J.K. Krejca. 2007. Revalidation of the milliped genus Amplaria Chamberlin 1941 (Diplopoda, Chordeumatida, Striari idae), and description of two new species from caves in Sequoia and Kings Canyon National Parks, California, Zootaxa 1532: 23-29. (available as pdf file [1.3 mb])
Krejca, J.K. 2003. The Mexican Blindcat (Prietella phreatophila): Research and
Exploration in the Groundwater. American Currents Vol. 29 No. 3, pp
5-11. (available as pdf file [1.1 mb])
Czaplewski, N. J., J. Krejca, and T. E. Miller. 2003. Late quaternary bats
(Mammalia: Chiroptera) from Cebada Cave, Chiquibul Cave system, Belize. In
Press. Caribbean Journal of Science, vol 39(1)
Trajano, E., N. Mugue, J. K. Krejca, C. Vidthayanon, D. Smart and R. Borowsky.
2002. Habitat, distribution, ecology and behavior of cave balitorids from Thailand
(Teleostei: Cypriniformes). Ichthyological Exploration of Freshwaters
13(2):169-184.
Hendrickson, D.A., J.K. Krejca and J.M.R. Martinez. 2001. Mexican Blindcats,
genus Prietella (Siluriformes: Ictaluridae): an overview of recent explorations.
Environmental Biology of Fishes 62: 315-337.
Burr, B.M., G.L. Adams, J. Krejca, R.J. Paul and M.L. Warren, Jr. 2001.
Cavernicolous sculpins of the Cottus carolinae Species Group in Perry County,
Missouri: Distriburion, External Morphology, and Conservation Status Review.
Environmental Biology of Fishes 62: 279-296.
Hendrickson, D.A. and J. K. Krejca. 2000. Cavefish and subterranean freshwater
biodiversity in northeastern Mexico and Texas. In: Freshwater Ecoregions of North
America: A Conservation Assessment, edited by R. A. Abell, D. M. Olson, E.
Dinerstein, P. T. Hurley, J. T Diggs, W. Eichbaum, S. Walters, W. Wetengel, T.
Allnutt, C. J. Loucks, and P. Hedao, Washington, D.C.: Island Press, p. 41-43.
Hofmann, J.E., J.E. Gardner, J.K. Krejca, and J.D. Garner. 1999. Summer records
and a Maternity Roost of the Southeastern Myotis (Myotis austroriparius) in Illinois.
Transactions of the Illinois State Academy of Science, Volume 92, 1 and 2, pp.
95-107.
Webb, D. W., L. M. Page, S. J. Taylor, and J. K. Krejca. 1998. The current status
and habitats of the Illinois Cave Amphipod, Gammarus archerondytes Hubricht
and Makin (Crustacea: Amphipoda). Journal of Cave and Karst Studies
60(3):172-178. (available as pdf file [40 kb])
Feldhamer, G.A., J.O. Whittaker, J.K. Krejca and S.J. Taylor. 1995. Food of the
Evening Bat (Nycticeius humeralis) and Red Bat (Lasiurus borealis) from Southern
Illinois. Transactions of the Illinois State Academy of Science. Vol. 88:3 and 4, pp.
139-143.
Webb, D.W., S.J. Taylor, and J.K. Krejca. 1994. The Biological Resources of
Illinois Caves and Other Subterranean Environments. Technical Report
ILENR/RE-EH-94/06, Illinois Natural History Survey, Center for Biodiversity. ix +
157 pages.
SELECTED PRESENTATIONS:
Krejca, J.K., S.J. Taylor and D.A. Hendrickson, 2000. The Mexican Blindcat Research Team. National Speleological Society News, January 2009, 67:1, 9-12.
Krejca, J.K. 2003. Biology of caves on Coronation Island, Alaska. National Speleological Society News, April 2003, 61:4, p 91.
Taylor, S.J., L.D. Bertoni and J.K. Krejca. 1998. Exploration and Survey of the Sao Vicente System, Goias, Brazil. National Speleological Society News, December 1998, 56:12, 347-351
Krejca, J. K. (presentor), D. A. Hendrickson, and S. J. Taylor. 1999. Using Prietella phreatophila (Ictaluridae) and other cave organisms to follow groundwater in Texas and Mexico. 31st Annual
Meeting of the Desert Fishes Council (18 to 21 November, Ciudad Victoria, Tamaulipas, Mexico).
Hendrickson D.A., Krejca J.K. Notes on biogeography, ecology and behavior of Mexican blind catfish, genus Prietella (Ictaluridae). Journal of Caves & Karst Studies 59:166. National Speleological Society annual meeting, Sullivan, Missouri, August 1997.
Bats: dispelling myths. Herrin City Library, Herrin, Illinois, June 1995.
Taylor, S. J., J. K. Krejca, D. W. Webb, and J. E. Gardner. 1994. A biological inventory and water quality analysis of Illinois caves and other subterranean environments. Presented at the Missouri Academy of Science annual meeting cosponsered by the Missouri Speleological Survey. Cape
Girardeau, MO. April 29-30, 1994.
Cavernicolous sculpins of the Cottus carolinae species group (Pisces: Cottidae) from Perry County, MO. Presented at the Missouri Academy of Science annual meeting cosponsered by the Missouri Speleological Survey. Cape Girardeau, MO. April 29-30, 1994.
Cavernicolous sculpins of the Cottus carolinae species group (Pisces: Cottidae) from Perry County, MO. National Speleological Society annual meeting, Pendleton, Oregon, August 1993.
Caves and Bats: fragile resources of the Cache River basin. Cache River Workshop, Carbondale, Illinois 1993.
The fauna of Illinois caves Mississippi Karst Tour, Waterloo, Illinois, April 1993. Mistnetting and bat handling. University of Illinois, October 1992
Illinois caves and cave life. World of Science Lecture Series, Staerkel Planetarium, Champaign, Illinois, April 1992.
EXPEDITION CAVING:
União Paulista de Espeleologia. Summer 1995. Cave mapping in central Brazil karst.
Proyecto Espeleológico Purificación. Winter 1995-present. Mapping and performing biological inventories in the area of Mexico's longest cave system.
Coahuila, Nuevo Leon, & Tamaulipas, Mexico. March, August 1997; March, June, November 1998; March, July 1999 Biological studies of troglobitic Mexican blind cave catfish.
Chiquibul, Belize. May 1998, May 1999. Cave mapping, cave passage dating (paleomagnetic clay, Uranium/Thorium speleothem), and biological collections in a large, remote cave system on the Belize/Guatamala border.
See: Miller, T. April 2000. Chiquibul Cave. National Geographic Magazine.
197(4)54-71.
Also see: National Geographic images on the web.
Lechugilla Cave, New Mexico. September 1998 and October 1999. One week (each visit) doing restoration and survey work.
Gunung Buda Project, Malaysia. January through March 2000. Assisted with a volunteer resource inventory for the Sarawak Forest Department in order to help them create a new national park. Cave surveys and biological inventories were performed.
OTHER RELEVANT QUALIFICATIONS:
Vertical caving: Proficent at vertical techniques and rigging ropes, both European and American styles
Cave diving: Fully cave certified by NSS-CDS (cave diving section)
Cave survey: Proficient in any role on a survey team (tape, instruments, sketch)
Cartography: Experienced cartographer, with many published cave maps
CPR/First Aid certification: Current
National Cave Rescue Commission: Participated in training seminars in Monroe County, Illinois (1993) and Perry County, Missouri (1994).