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Summary of Observational Research Completed at The Philadelphia Zoo to Date (February, 2000):

Observer

Date of Study

Hours of Study

 Tamarins Studied, Female (F), Male (M)

Jen Egan

January 30 - February 15, 1995

42 hours; most between 10-4

Milton (M), Maria (F), Caetano (M), Gal (F), Juvenile (F), Juvenile (M)

Ellen Zettlemoyer

February 11 - March 22, 1995

21 hours; most between 10-4

Milton (M), Maria (F)

Julie Williams

February 11 - March 10, 1996

21 hours; most between 12-4

Maria (F)

Maria Bell

February 9 - March 24, 1996

22 hours; most between 10-4

Milton (M), Maria (F), Caetano (M), Gal (F), 3 Juveniles (F), 2 Juveniles (M)

Christy Swerdlow

February 2, 1998 - February 26, 1998

20 hours; most between 11-3

Marisa (F), Caetano (M), Gal (F)

Ryan Lenox

February 8, 1999 - March 7, 1999

20 hours; most between 11-4

 Marisa (F),  Gal (F)

Zach Haas

January 28 - February 15, 1999

20 hours; most between 11-4

Marisa (F),   Gal (F)

Zach Haas & Ryan Lenox

January 10, 2000 - January 26, 2000

40 hours; most between 11-4

Marisa (F),   Gal (F),   Pipoca (M)