Abstract # 83:

Scheduled for Sunday, September 20, 2009 09:55 AM-10:05 AM: Session 7 (Mission Bay Ballroom AB) Symposium


LONG-TERM STUDIES OF DOUC LANGUR POPULATIONS AT MT. SON TRA, VIETNAM: A TRIBUTE TO CHARLES SOUTHWICK

L. Lippold
PO Box 23912, San Diego, CA 92193, USA
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Charles Southwick’s impact on my study of Vietnam’s Douc Langur populations (Pygathrix nemaeus) started more than 35 years ago at Mt. Son Tra. Fieldwork during the Vietnam War was difficult but a small population was recorded totaling 30 individuals divided into three groups. Returning to Vietnam after a 19 year absence, my team surveyed more than 30 sites country wide searching for viable douc populations. Our work produced a picture of poorly protected, highly fragmented small groups with a total number of less than 1000 at high risk due to hunting, poaching and extensive wildlife trade. We returned to Mt. Son Tra 6 times in the next 10 years to find small populations. We returned again in 2006, because the area was slated for intense development based on the reported extinction of the doucs. We found a very large population which we estimate to be between 300-400 individuals in 14 multi male groups. With Chuck’s enthusiastic support, this large population has become the focus of an intensive, long term co operative research and conservation project undertaken by the Douc Langer Foundation, University of Hanoi and Forest Protection Department, Danang. Studies of feeding ecology, population dynamics, ranging and reproductive behavior are projected until at least 2015.