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The abstract of PhD dissertation in Biology: The study in ecology of the Indochinese silvered langur (Trachypithecus germaini Milne-Edwards, 1876) at the Chua Hang karst mountain, in Kien Kuong district, Kien Giang province

The main objective of this study was to characterize the ecology of the Indochinese silvered langur at the Chua Hang Karst Mountain. The findings from this study add important information needed for the conservation of the Indochinese silvered langur in Vietnam. | MINISTRY OF EDUCATION VIETNAM ACADEMY AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ----------------------------- LE HONG THIA THE STUDY IN ECOLOGY OF THE INDOCHINESE SILVERED LANGUR Trachypithecus germaini Milne-Edwards 1876 AT THE CHUA HANG KARST MOUNTAIN IN KIEN LUONG DISTRICT KIEN GIANG PROVINCE Area of specialization Ecology Code 9 42 01 20 THE ABSTRACT OF PHD DISSERTATION IN BIOLOGY Ho Chi Minh City 2019 The dissertation was performed at Graduate University of Science and Technology Vietnam Academy Science and Technology. Supervisor 1 Professor Dr. Herbert Hadley Covert Supervisor 2 Dr. Hoang Minh Duc Reviewer 1 Reviewer 2 Reviewer 3 The dissertation will be defended at the PhD dissertation committee of Graduate University of Science and Technology Vietnam Academy Science and Technology at on 20 . The dissertation was deposited at - Library of Graduate University of Science and Technology - National Library of Vietnam 1 INTRODUCTION 1. Justification of dissertation The Indochinese silvered langur Trachypithecus germaini is one of twelve colobine species found in Vietnam and its largest population is found in the Kien Luong Karst area. The silvered langur has a small distribution range in the Mekong Delta. The previous studies estimated that the total population size of this species in Vietnam is between 362 and 406 individuals and the largest population comprises 286 individuals in Kien Luong Karst Area of Kien Giang Province. The Indochinese silvered langur is listed as Endangered in the IUCN 2013 - Redlist of Threatened Species as globally endangered A2cd. Under pressures from habitat destruction through limestone exploitation in Hon Chong - Kien Luong area by cement companies and the local community the local government planned to translocate the silvered langur population to other karst areas. However ecological studies in this species such as diet and feeding ecology the chemistry of their eaten leaves and the types .