Michael J. Ryan, Short-Term Visitor, University of Texas at Austin. 

 Sexual Selection and Sound Localization in the Frog Physalaemus 

 pustulosus , with Dr. Stanley Rand, from July 1 through July 31, 1987. 



Isaac J. Schlosser, Short-Term Visitor, University of North Dakota. Land 

 Use and Stream Ecosystems, with Dr. James Karr, from March 27 through May 

 3, 1987. 



Leila M. Shultz, Short-Term Visitor, Utah State University. 

 Investigations in Leaf Anatomy, with Dr. Joseph Wright, from March 23 

 through April 8, 1987. 



John Sperry, Short-Term Visitor, University of Vermont. Water Stress 

 Physiology of Trees, with Dr. Egbert Leigh, from February 1 through 

 February 28, 1987. 



Nellie M. Stark, Short-Term Visitor, University of Montana. The Influence 

 of Excess Leaching on Weathering and Mycorrhizal Uptake of Nutrients, with 

 Dr. Joseph Wright, from July 5 through July 18, 1987. 



Melvin Tyree, Short-Term Visitor, University of Vermont. Water Stress 

 Physiology of Trees, with Dr. Egbert Leigh, from February 1 through 

 February 28, 1987. 



Paul Weldon, Short-Term Visitor, Texas A & M University. The Proximate 

 Cues Used by Pacific Snappers to Identify the Yellow- Bellied Sea Snake, 

 with Dr. Ira Rubinoff, from June 6 through August 17, 1987. 



Walter Wilczynski, Short-Term Visitor, University of Texas at Austin. 



Behavioral and Neural Mechanisms by which Neotropical Frogs Organize 



Themselves within a Breeding Chorus, with Dr. Stanley Rand, from June 23 

 through July 1H, 1987. 



Truman P. Young, Short-Term Visitor, University of Miami. Investigations 

 of Canopy Shapes, with Dr. Stephen Hubbell, from February 1 through March 

 2, 1987. 



Volunteers 



James Robert Duran, worked on scanning the literature in the STRI Library, 

 from October 1986 through September 1987. 



Sarah Flick, worked on the causes and consequences of rarity and 

 distributions of certain tree species, with Dr. Stephen Hubbell, from 

 January through May 1987. 



Joseph P. Garofalo, worked as electronics technician with Dr. Haris 

 Lessios, from August 31 through September 30, 1987. 



Corina S. Hinkle, worked on reviewing the literature in the STRI Library, 

 from October 1986 through September 1987. 



122 



