A system for monitoring and improving animal visibility and its implications for zoological parks

Authors: C. W. Kuhar, L. J. Miller, J. Lehnhardt, J. Christman, J. D. Mellen, T. L. Bettinger

Publication/Journal: Zoo Biology

Keywords: animals, behavior, captivity, spatial use

2010

GPS determination of walking rates in captive African elephants (Loxodonta africana)

Authors: Katherine A. Leighty, Joseph Soltis, Christina M. Wesolek, Anne Savage, Jill Mellen, John Lehnhardt

Publication/Journal: Zoo Biology

Keywords: animal movements, enclosure size, exercise, welfare

2009

Successful artificial insemination of an Asian elephant at the National Zoological Park

Authors: Janine L. Brown, Frank Göritz, Nancy Pratt-Hawkes, Robert Hermes, Marie Galloway, Laura H. Graham, Charlie Gray, Susan L. Walker, Andres Gomez, Rachel Moreland, Suzan Murray, Dennis L. Schmitt, JoGayle Howard, John Lehnhardt, Benjamin Beck, Astrid Bellem, Richard Montali, Thomas B. Hildebrandt

Publication/Journal: Zoo Biology

Keywords: assisted reproduction, hormones, lh, pregnancy, ultrasound

2004

Circulating levels of α-tocopherol and retinol in free-ranging African elephants (Loxodonta africana)

Authors: A. Savage, K. M. Leong, D. Grobler, J. Lehnhardt, E. S. Dierenfeld, E. F. Stevens, C. P. Aebischer

Publication/Journal: Zoo Biology

Keywords: african elephant (loxodonta africana), fat-soluble vitamins, nutrition, physiological status

1999

Secretory patterns of serum prolactin in Asian (Elephas maximus) and African (Loxodonta africana) elephants during different reproductive states: Comparison with concentrations in a noncycling African elephant

Authors: Janine L. Brown, John Lehnhardt

Publication/Journal: Zoo Biology

Keywords: anovulation, estrous cycle, galactorrhea, hyperprolactinemia, pregnancy

1997