Vietnam Primate Conservation Status Review 2002 - Hoang Lien ...

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Vietnam Primate Conservation Status Review Part 2: LEAF MONKEYS 58 3.3.3 Distribution The terra typica of T. poliocephalus poliocephalus is not specified. The donor of the holotype M. Leger only noted that the species is “not rare in the province of Cai Khin, to the northeast of Tonkin” (Trouessart, 1911). It is not possible to verify the correct identification of the name of the locality and its geographic position. Transcriptions of Vietnamese names often vary, and many different places in the same area have regularly the same name. Additionally, names of places frequently change. Fooden (1976) mentioned the village Cai Kien (21°19’N, 107°44’E) as a presumed locality. Cai Kien is a small island about 25km south of the Chinese border. However, the island, now called Cai Chien, has no suitable habitat for langurs and did not have such habitat in the past. The only known locality where the Cat Ba langur occurs is the Island of Cat Ba in Ha Long Bay, close to Hai Phong City. There is no evidence that the Cat Ba langur ever occurred on the mainland. T. p. poliocephalus is closely associated with limestone areas – as are the other northern species of the francoisi-group: T. francoisi and T. p. leucocephalus – and there is no limestone habitat close to Cat Ba on the mainland. Fossil primates that belong to the colobines are not classified to species level yet, but they are known only from the area where T. francoisi occurs (Lang Son Province), and not from the mainland close to the coastline (Nisbett & Ciochon, 1993). It is highly unlikely that the poliocephalus population on Cat Ba Island is a relic population of a formerly widespread species that also occurred on the mainland. The Cat Ba population has experienced a longer development period due to its restriction to a relatively small area, which probably included only the limestone range around Cat Ba (now separate islands) during a time when there was a lower sea level in the Sunda shelf. 3.3.4 Cat Ba langur records Cat Ba Island (HAI PHONG) Special-use forest: Partly includes Cat Ba National Park Cat Ba langur status: Occurrence confirmed, last evidence in 2003 (Stenke, pers comm.) FZS conducted a first detailed survey for the species from November 1999 until March 2000 and did a first exact census of the population (Nadler & Ha Thang Long, 2000). With the inclusion of sightings prior to the survey (since 1998) in several localities the population was estimated to comprise a total number of 104 to135 individuals (Table 3.3.4-1). Extremly high hunting pressure caused a dramatic decline during and after the survey. A recent intensive survey conducted as a component of the ZSCSP “Cat Ba National Park Conservation Project” confirmed the existence of only 50 to 60 animals until December 2001 (Table 3.3.4.-2; Stenke, 2001c). Two langur groups were found on smaller islands. It can be assumed that in the past, the langurs moved from the main island across a mangrove-covered bay. These animals are now isolated due to mangrove destruction.
DISTRIBUTION OF CAT BA LANGUR (Trachypithecus poliocephalus poliocephalus) IN VIETNAM BAŒN ÑOÀ PHAÂN BOÁ LOAØI VOOÏC CAÙT BAØ ÔŒ VIEÄT NAM CHINA 107 0 10’ E 107 0 05’ E 107 0 00’ E 106 0 55’ E 106 0 50’ E LAOS THAILAND 20 0 55’ N CAMBODIA HAŒI PHOØNG VIETNAM 20 0 50’ N 3.3 CAT BA LANGUR - Trachypithecus poliocephalus poliocephalus CAÙT BAØ 20 0 45’ N LEGEND-CHUÙ GIAŒI National park boundary Ranh giôùi VQG Caùt Baø 10 5 0 Records of Cat Ba langur Ghi nhaän veà vooïc Caùt Baø KM 1989-1994 / Provisional (taïm thôøi) 1995-2003 / Confirmed (ñaõ xaùc nhaän) 59
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Tilo Nadler - Frank Momberg - Nguye
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THE DESIGNATION OF GEOGRAPHICAL ENT
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iv 3.4 Delacour’s langur (Trachyp
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vi Acknowledgement Fauna & Flora In
Page 10 and 11: viii Abbreviations Key to abbreviat
Page 12 and 13: Red-shanked douc langurs; group of
Page 14 and 15: Vietnam Primate Conservation Status
Page 18 and 19: 3 2 1 4 1. Indochinese Silvered lan
Page 27 and 28: 3. Langurs
Page 29 and 30: 3. Langurs 3.0 An introduction to t
Page 31 and 32: The basic social organisation for t
Page 33 and 34: 3.1 Francois’ langur
Page 35 and 36: 3.1 Francois’ langur Trachypithec
Page 37 and 38: DISTRIBUTION OF FRANCOIS' LANGUR (T
Page 39 and 40: 3.1 FRANCOIS’ LANGUR - Trachypith
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Page 43 and 44: Discussed records Quang Ninh Provin
Page 45: 3.1 FRANCOIS’ LANGUR - Trachypith
Page 48 and 49: 2 3 6 1 4 5 1. Hatinh langur; ad. m
Page 58 and 59: 1 2 3 4 1. Cat Ba langur; ad. femal
Page 71 and 72: 3.4. Delacour’s langur
Page 73 and 74: 3.4 Delacour’s langur Trachypithe
Page 75 and 76: 3.4 DELACOUR’S LANGUR - Trachypit
Page 77 and 78: 3.4.4 Delacour’s langur records 3
Page 83 and 84: Locations where Delacour’s langur
Page 85 and 86: 3.4.5 Status 3.4 DELACOUR’S LANGU
Page 87 and 88: 3.4.6 Recommendations for conservat
Page 91 and 92: 3.5. Grey langur
Page 93 and 94: 3.5 Grey langur Trachypithecus crep
Page 95 and 96: Distribution in China 3.5 GREY LANG
Page 97 and 98: 3.5 GREY LANGUR - Trachypithecus cr
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Page 101 and 102: Vu Quang National Park (HA TINH) Sp
Page 103 and 104: Ha Tay Province 20 O 34’-21 O 17
Page 105 and 106: 3.6. Indochinese Silvered langur
Page 107 and 108: 3.6 Indochinese Silvered langur Tra
Page 109 and 110: 3.6 INDOCHINESE SILVERED LANGUR - T
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3.6 INDOCHINESE SILVERED LANGUR - T
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3.6 INDOCHINESE SILVERED LANGUR - T
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4.0. Douc langurs
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4. Douc langurs 4.0 An introduction
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4 DOUC LANGURS Groups are character
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4.1.2 Black-shanked douc langur Pyg
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4 DOUC LANGURS DISTRIBUTION OF RED-
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4 DOUC LANGURS DISTRIBUTION OF BLAC
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4 DOUC LANGURS One infant skull (IE
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4 DOUC LANGURS Bach Ma National Par
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4 DOUC LANGURS My Town and Ro Villa
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4 DOUC LANGURS very poor secondary
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A Yun Pa Nature Reserve (GIA LAI) S
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Krong No District (DAK LAK) Special
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4 DOUC LANGURS The Ra Glai minority
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Dinh Quan District (DONG NAI) Speci
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4 DOUC LANGURS Obviously there are
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4 DOUC LANGURS ✱ The establishmen
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2 3 1 1. Tonkin snub-nosed monkey;
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Vietnam Primate Conservation Status
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DISTRIBUTION OF TONKIN SNUB-NOSED M
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5 2 3 1 4 6 1. Hunters with living
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7.0. Conservation Policy
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7. Conservation policy 7.1 Hunting
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The aims of an ex-situ programme sh
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7 CONSERVATION POLICY Table 7.4-1 R
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8. References 8 REFERENCES Adler, H
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8 REFERENCES Boonratana, R., and Le
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8 REFERENCES Dao Van Tien. 1970. Su
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8 REFERENCES Fooden, J. 1976a. Prov
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8 REFERENCES Hill, W. C. O. 1934. A
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8 REFERENCES Le Khac Quyet and Trin
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8 REFERENCES Lippold, L. K. 1995a.
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Monestrol, H. (ed.). 1952. Chasses
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8 REFERENCES Ngo Van Tri. 1999b. Th
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8 REFERENCES Pham Nhat, Nguyen Xuan
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8 REFERENCES Simonetta, A. 1957. Ca
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8 REFERENCES Vermeulen, J. and Whit
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Appendix 1 Leaf monkey species in t
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Appendix 2 Selected areas of high v
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8 APPENDIX: 2 the surrounding area
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8 APPENDIX: 2 Forests in the southe
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Ke Go Nature Reserve (HA TINH) Spec
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8 APPENDIX: 2 was decreed with a to
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8 APPENDIX: 2 Elevation: reaching 1
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8 APPENDIX: 2 regeneration of everg
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Appendix 3 IUCN RED LIST CATEGORIES
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EXTINCT (EX) A taxon is Extinct whe
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B Extent of occurrence estimated to
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D Population estimated to number le
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The Primate Conservation Status Rev
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