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Thomas Geissmann
Gibbon Research Lab., Hannover

Several papers on gibbons were presented at the 18th Congress of The International Primatological Society, Adelaide, South Australia (7-12 January, 2001). Abstracts of the following presentations were submitted:

Brockelman, W. Y., Kanwuttanakid, C., Vimuktayon, P. & Kunsakorn, P.:
Diet and seed dispersal by gibbons Hylobates lar in Thailand.

Dallmann, R. & Geissmann, T.:
Different levels of variability in the female song of wild silvery gibbons Hylobates moloch.

Geissmann, T.:
A model of inheritance in gibbon songs.

Jiang, X. & Wang, Y.:
Black-crested gibbons (Hylobates concolor), its endangered situation and conservation strategy in Wuliang Mountain, Yunnan, China.

McConkey, K. & Bricknell, S.:
Fruit selection by hybrid gibbons (Hylobates agilis x H. muelleri) in the rainforests of Borneo.

Ngo Van Tri & Trinh Viet Cuong:
Observation on primates in Cu Jut district, Dak Lak province in the central highlands of southern Viet Nam.

Nguyen Xuan Dang & Momberg, F.:
Current status and conservation of the black gibbon in Vietnam.

Nijman, V. & Geissmann, T.:
Calling behaviour of male silvery gibbons on Java, Indonesia.

Reichard, U.:
Social grouping patterns in wild gibbons.

Suzuki, J., Ishida, T., Ohkura, S., Udono, T., Hayasaka, I. & Asaithamkul, V.:
Plasma IGF-1 levels in the great and lesser apes.

Takacs, Z., Morales, J. C., Geissmann, T. & Melnick, D.:
Molecular phylogeny of Hylobatidae.