Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam

Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam Nguyen Manh Ha Centre for Natural Resources and Environmental Studies (CRES) Nguyen Hoang Hao Tran Duc Dung Nguyen Manh Diep Pham Van Nong Dong Nai Nature Reserve December 2010 Citation: Author: Nguyen Manh Ha, Nguyen Hoang Hao, Tran Duc Dung, Nguyen Manh Diep, Pham Van Nong, Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam Fauna & Flora International/Conservation International, Hanoi, Vietnam Nguyen Manh Ha Centre for Natural Resources and Environmental Studies (CRES) Nguyen Hoang Hao Tran Duc Dung Nguyen Manh Diep Pham Van Nong Dong Nai Nature Reserve Date: December 2010 Reviewed by: Dr Ben Rawson and Paul Isua-Cao Funded by: Arcus Foundation, The Rufford Small Grants for Nature Conservation, and the SeaWorld & Busch Gardens Conservation Fund Cover photo: The forest of Dong Nai Nature Reserve / Nguyen Manh Ha Table of Contents Table of Contents Acknowledgements Introduction Background information of biodiverisy and primate studys in Dong Nai NR Goal and objectives Survey method and timing Results 12 5.1 Gibbon records in Dong Nai NR .12 5.1.1 Results of interview survey 12 5.1.2 Results of listening post survey 12 5.1.3 Results of transect surveys .16 5.3 Records of other primates in Dong Nai NR 19 5.4 Conservation issues 22 5.4.1 Illegal hunting and trapping of wild animals 22 5.4.2 Non-timber forest product collection .22 5.4.3 Cattle grazing and forest fire 23 4.4.4 Habitat fragmentation .23 Discussion 24 Conservation recommendations 25 References .26 Appendix .27 Appendix 1: Detailed information on gibbon records in Dong Nai NR 27 Appendix 2: Result of transect surveys 31 Appendix 3: Records of other primates 39 Appendix 4: Records on human impacts 43 Appendix 5: Records of other endangered species 47 Acknowledgements This study was made possible with important financial support from ARCUS FOUNDATION, The Rufford Small Grants for Nature Conservation, and the SeaWorld & Busch Gardens Conservation Fund and technical Support from Fauna & Flora International/Conservation International We would like to express our thanks to the Management Board of Dong Nai Nature Reserve, especially Mr Nguyen Hoang Hao and the staff of Vinh Cuu for the great help of the research team during our research in this protected area We would also like to express our thanks to the local community and local field assitants in the Vinh Cuu district who provided important support for our team in the field Introduction Dong Nai Nature Reserve (NR) is one most important conservation areas in Vietnam as the reserve is one of the largest in terms of area and biodiversity richness The Nature Reserve covers an area of 68,370 ha, and 87% of the area is covered by natural forest The landscape of the nature reserve is dominated by lowland semi-evergreen forest with an elevation range of 100-340 m above sea level (asl) The reserve is one of the most important strategic watershed forests of the Dong Nai River and Tri An hydropower dam which provides drinking water for the second most populated and industrial area of Vietnam During a working group meeting on gibbon status in Vietnam held in 2009, it was concluded that the Vinh Cuu-Cat Tien forest complex is one of the most important conservation areas for the yellow-cheeked gibbon in Vietnam Besides its rich biodiversity and significant conservation value, Dong Nai NR is also identified as an illegal wildlife trade hot-spot where gibbons and other primates are sourced for illegal trade However, there is no study so far to provide accurate information on the primate population in this important nature reserve The Vinh Cuu Nature Reserve and Historical Relics (now called Dong Nai Nature Reserve and referred as such throughout this document) was established in 2004 by Dong Nai’s Provincial People Committee based on the area of three state forest enterprises and Historical War Sector D’ Management Board and Centre for Fishery of Dong Nai The total area of the nature reserve is 100,303 ha, include: 67,903 forest land and 32,400 of water of the Tri An reservoir The nature reserve is located on the northern side of Dong Nai river and spans 11 communes and towns of five districts in Dong Nai province The coordinates of the reserve fall within: 11008’55” - 11051’30” North 106090’73” - 107023’74” East The reserve is connected in the north with Binh Phuoc province; in the south with Dong Nai River and Tri An Reserasian elephant; in the east with Cat Tien National Park and Tri An reservoir; and in the west with Binh Duong and Binh Phuoc provinces Topography The reserve falls in the transition area between Bao Loc-Lam Dong plateau to flatter areas of the Vietnam South-Eastern geographical region The terrain in the area typically consists of gentle hills or flat areas The highest hill in the reserve is 368 m ASL and the lowest area is 20 m above sea level (ASL) with an average altitude of 100 - 120 m asl Average slope is 8o - 10o Climate The reserve has a typical tropical monsoon climate with little effect from the northern cold winter during the winter months Therefore the temperature year round in the reserve is 25270C with humidity around 80-82% This tropical climate is very suitable for the development of natural vegetation and agriculture crops in the area Dong Nai NR has a fairly high annual rain fall from 2,000-2,800 mm, with average daily rain fall of 130-150 mm Rain fall is high but is very seasonal, with two distinct periods: (1) dry season is a period of six months from November to April During this time the area has almost no rain Total rainfall during the dry season is only 10-15% of total annual rainfall of the area with an average evaporation rate of 64-67% of total evaporation per annum (2) rainy season runs from May to October when the rainfall is most intense, with 90% of total annual rainfall in the area falling ion this period Biodiversity resources Recent biodiversity surveys conducted in Dong Nai NR confirmed the richness of biodiversity in the area There are 1,401 species of plant belong to 589 genera, 156 families, 92 orders and 10 phyla Typical forest types are: evergreen, semi-evegreen and mixed bamboo forest and grassland There are 1,729 species of insect belong 238 families so far identified (VCNR, 2009a) Surveys also confirm the existence of 85 species of mammal belong to 27 families including 36 which are endemic and endangered in Vietnam and Southeast Asia and 26 species listed in IUCN Red List of threatened species (VCNR, 2009a) There are 259 species of bird belonging to 52 families, among those 12 species are listed in the Vietnam Red Data Book and 11 species are listed in IUCN Red List of threatened species A total of 64 reptile species have also been confirmed in the reserve with an additional 33 species listed in IUCN Red List and 21 species listed in the Vietnamese Red Data Book There are also 99 fresh water fish species confirmed in the reserve Map Location of Dong Nai Nature Reserve Background information of biodiverisy and primate studys in Dong Nai NR Dong Nai NR is believed to home of up to seven taxa of primate, including the yellowcheeked crested gibbon (Nomascus gabriellae), black-shanked douc (Pygathrix nigripes) and Indochinese silvered langur (Trachypithecus margarita) which are all globally threatened species The reserve is also a key conservation site for other endangered mammals in Vietnam such as the Asian elephant (Elephas maximus) and gaur (Bos gaurus) In additon, Dong Nai NR has similar habitat and is contiguous with Cat Tien National Park which is the best known area for yellow-cheeked crested gibbon conservation in Vietnam Therefore Dong Nai NR is likely to contain a significant population of yellow-cheeked crested gibbons Beside it’s biodiversity richness, Dong Nai NR was identified as an illegal hunting and trade hot-spot for wildlife Recent data on illegal wildlife trade in Vietnam’s Lower Mekong Region confirmed that gibbons and other primates were commonly illegally hunted, smuggled and traded from this reserve Illegal hunting and trade is considering as the primary threat to the survival of gibbons in this area and indeed, hunting and trade has emerged as a real threat to the survival of much of the terrestrial fauna of this important nature reserve Despite this fact there is not many detail biodiversity survey have been carried out for this nature reserve There is also no specific study on gibbons and other endangered primate populations in this important nature reserve Some key biodiversity surveys so far conducted Dong Nai NR include the following: Bird survey for three state forest enterprises (Hieu Lien, Ma Da, Vinh An) conducted in 2002 Study to analyse the impacts of Agent Orange on biodiversity and the change of ecosystems in Ma Da area Specimen collection of the sites forest, wild fauna and flora conducted by Dong Nai NR, IEBR, Southern Sub-Institute of Forest Planing and Inventory and Institute of Fishery Research and Breeding (2007-2009) These surveys and studies have confirmed the existence of at least seven taxa of primate in the nature reseve including: pygmy loris (Nycticebus pygmaeus), bear macaque (Macaca arctoides), long-tailed macaque (Macaca fascicularis), pig-tailed macaque (Macaca leonina), silvered langur (Trachypitecus margarita), black-shanked douc (Pygathrix nigripes) and the yellow-cheeked crested gibbon (Nomascus gabriellae) Again the population and status of these taxa is unknown due to the lack of specific survey and research on these groups of animals in the reserve Goal and objectives The overall goal of this survey was to provide information on the population of yellowcheeked crested gibbons in Dong Nai NR and to raise conservation capacity of Dong Nai NR staff concerning endangered primate study and monitoring Specific objectives - Undetake a one day training for Dong Nai NR staff in gibbon survey techniques and reporting; - Undertake a field survey for gibbons in Dong Nai NR; - Produce a report on the gibbon population in Dong Nai NR and associated threats and conservation issues; - Based on survey results, to produce recommendations for future conservation of gibbons in Dong Nai NR Survey method and timing The survey followed standard gibbon survey methods that have been widely used in Vietnam and successfully used for gibbon survey and monitoring in Quang Nam, Thua Thien Hue and Quang Tri province Listening post surveys was the key method used during the survey Additionally, transect lines and observation posts were also used in daytime surveys wherever forest type and terrain were favorable, such as in areas that gibbon were suspected to occur in, in order to maximize data collection and opportunistically observe gibbons in the forest An archival study was also conducted, with all reports and related studies on mammals and primates in Dong Nai NR and adjacent areas collected and analysed The information provided our team with a good background for field surveys and to select focal survey areas An interview survey was conducted in Ly Lich, Ma Da, Hieu Lien and Phu Ly communes and in all forest ranger stations of Dong Nai NR to collect information on gibbons before the field survey In total, 25 local people, including five hunters, 10 technical staff and 15 rangers of the nature reserve were interviewed Based on the interview results and consultation meetings with Dong Nai NR forest rangers, the reserve was divided into three sectors and the number of listening posts in each sector determined based on the collected information and habitat type of the area Evergreen and semi-evergreen forested areas were given the highest priority; secondary forest, regenerated forest and mixed bamboo forest were given lower priority Descriptions of the three sector s are given below: - Vinh An area has the highest concentration of the least disturbed forest and evegreen forest It was also the area where most interviewees indicated the core gibbon distribution area in Dong Nai NR was located and was thus given the higest priority 23 listening posts were selected for this area - Ma Da sector is located further in the southern part of the reserve and is a transistion area between the most undisturbed to the most disturbed forest Interview results indicated that gibbons not occur in this area, and as such only six listening posts were surveyed here - Hieu Liem sector is in the southernmost part of the reserve and no information on gibbons occurring in this area was collected during interview surveys This area also represents the most disturbed area of the reserve with the entire forest area in this sector consisting of secondary and regenerated forest Five listening posts were surveyed in this sector The listening posts and transects were selected by combining secondary data from archival research and interview information with topography and forest cover maps of Dong Nai NR In total, 34 listening posts were selected for the whole nature reserve The posts were located in different type of habitats and represented all major forest types in the area including evergreen-broadleaf forest, semi-evergreen forest, dipterocarp deciduous forest and mixed bamboo forest (see Map 2) The minimum distance between listening post was 1,2 km with a maximum of 3.0 km Each listenting post was surveyed on two consecutive days Survey time for each listening post was from 04:30 to 10:00 Average listening post survey time was hours per day In total 69 days were spent for this listening post survey with aproximaetly 414 survey hours The following data were collected and noted in a standard listening post datasheet (see Appendix 1) for each listening post: - time of gibbon singing (beginning and end); - weather the night before and at the time of survey; - compass bearing to calling gibbon group; - distance to the gibbon group(s); - gibbon group(s) composition: male, female, juvenile, infant (if possible) - brief description of forest types; - human impacts; - tape recording of the singing and photograph (if possible) From each listening post, one transect was created that started from the listening post and went in one direction for approximately to km in length The transect walk was selected depending on the terrain and vegetation type, and in general the team often chose to walk in undisturbed woodland areas rather than bamboo or disturbed forest (i.e transects were non-ramdom) The survey time on transects was from 10:00 to 12:00 On each transect information on gibbon occurance and other primates and other species sighted was also noted in detail in data sheets (see Appendix and 3) In total 33 transects were established during the survey Total transect walking distance was 91.9 km and total time for transect surveys was 84 hours From 14:00 to 17:00 the team spent time to locate the next listening post and transect for the following survey day Gibbon calls, wherever possible, were recorded stored for future usage No DNA sample from gibbon (hair, tissue, skin, bone, dung) was taken during the survey 10 Transect HL HL HL Start End 1245707 1246848 711561 1242555 711116 1239100 712767 1240066 714745 713634 1243930 712723 1240042 724673 1238875 715507 1249031 1250431 714737 1249032 714737 1249032 715511 1250407 715507 1250430 712867 HL Coordinate Date E N 718136 718016 1246307 1246343 714001 1243916 Compass bearing Distance (m) Individual Species tổng tr thành Civet wild boar 1 1 gaur non không rõ 1247561 711116 1239100 712452 712723 1240042 712590 Other discription Weather Surveyor ko mưa tú Hưng hiếu liêm 6/10/2010 hiếu liêm 7/10/2010 có nắng tân Đào hiếu liêm 8/10/2010 ko mưa tú Luận hiếu liêm 5/10/2010 nhiều mây, có sương tân Luận hiếu liêm 6/10/2010 ko mưa, sunny điệp Hưng hiếu liêm 4/10/2010 ko mưa, có nắng điệp Đào Tân dung, foot print foot print obs dung, foot print trời quang, sunny tân Lan ủi, foot print có nắng tân Đào ko mưa, có nắng điệp Đào Lan hiếu liêm 1247177 Type of trace print dung ủi foot print On the transect 715087 1250546 On the transect civet 715507 1250431 350 gà so cổ 715189 1250563 wild boar 714880 1249363 Civet 712580 1247176 712540 1247135 712738 50 On the transect 1 obs heard ủi, foot print dung Civet 1 gaur 1248131 gà rừng 712573 1248148 gaur 1 712703 1240022 wild boar 2 712593 1245488 gaur 712624 1245453 gaur 1 712802 1245335 210 1 712956 713226 1245353 1245292 On the transect 1 713180 C dinh c dinh Area hiếu liêm hiếu liêm 5/10/2010 6/9/2010 5/10/2010 On the transect On the transect 1 foot print foot print On the transect 50 37 long-tailed macaque Civet gaur obs dung foot print Transect Start 1245805 713123 End Area 1246091 715513 hiếu liêm HL 1247417 1247618 Coordinate Date 5/10/2010 Compass bearing Distance (m) Individual Species tổng tr thành non không rõ Type of trace E N 713143 1245249 gaur 712711 1245481 gaur 712900 1245476 gaur 712853 1245752 Bear 1 712749 1245918 Monitor 1 712760 1245925 Bear 1 712685 1246008 18 gà tiền mặt đỏ 1 712668 1246011 On the transect wild boar 2 713430 1247320 gaur 1 713771 1247443 wild boar 1 713801 1247523 wild boar 1 714583 714680 714752 1247248 1247162 1247105 Pied hornbill Pied hornbill Pied hornbill 1 1 foot print foot print foot print dấu trèo ủi, foot print dấu trèo heard ủi, foot print foot print ủi, foot print ủi, foot print obs obs obs 715292 1246542 Pied hornbill 2 obs 60 On the transect 38 1 Other discription Weather Surveyor ko mưa, cuối tuyến mưa lớn điệp Hưng Appendix 3: Records of other primates No Area date Coordinate Individual Species Time Compass bearing Start Vĩnh An 26/7/2010 E N 736579 1270294 25/7/2010 Total Male Fem Infant unknown Distance (m) Light rain Long-tailed macaque 27/7/2010 734954 1271620 10.40' 20 60 15/8/2010 10 11 12 13 15 16 17 18 19 Vĩnh An 26/7/2010 Vĩnh An 24/7/2010 Vĩnh An 24/7/2010 Vĩnh An 22/7/2010 Vĩnh An 1269249 1 25/7/2010 25/7/2010 23/7/2010 29/7/2010 23/7/2010 Vĩnh An 22/7/2010 738254 1268734 739182 1266913 739011 1262755 Hà Phát 6.20'15 6.28' 78 40 No rain 14.40'35 15.11'31 140 80 Sunny 737763 1264310 739923 1264626 739131 1261651 736850 1263098 No rain light rain No rain No rain No rain No rain Pig-tailed macaque 1 sunny Sunny Long-tailed macaque 15 12 5.45' 6.01'15 241 30 297 No rain No rain Hảo Phát Nông Phương 214 Điêp Thường Dũng Thường 271 308 240 259 200 Sunny No rain 39 Dũng Ninh No rain Sunny 24/7/2010 23/7/2010 28/7/2010 347 Hà Ninh 27/7/2010 Vĩnh An Vĩnh 734421 Surveyor Light rain No rain Blackshanked douc Pig-tailed macaque Attitude End 26/7/2010 Vĩnh An Weather Dũng Hà Dũng Thường Điệp.Phát Điệp.Phát Dũng Sánh Dũng Sánh Dũng.Pháp Hà Nông Hảo Nông 213 239 Điệp Hà Điệp Hảo Hà Dũng Pháp No Area date Coordinate Individual Species Time Compass bearing Start E 20 An 29/7/2010 23 Vĩnh An 28/7/2010 24 25 26 Vĩnh An 27 21 29 30 Vĩnh An Vĩnh An Vĩnh An 35 36 37 736390 Fem Infant unknown 14/8/2010 15/8/2010 16/8/2009 27/7/2010 15/8/2010 1260014 Vĩnh An 17/8/2010 20/8/2010 Vĩnh An 19/8/2010 119 Hảo Thường No rain 120 Tú.Tân.Hiệp Điêp.Tân.Thường 175 No rain 740315 1262526 737171 Bear macaque 10 1 14.40'35 10 13.30'25 15.11'31 140 100 Sunny 130 80 Sunny No rain 1258846 732915 1262802 729627 20 10 1263757 729992 7.10'21 5.40' 6.20' 100 LP No rain, sunny No rain, sunny No rain, sunny No rain, sunny No rain No rain, sunny No rain, sunny 1261226 19/8/2010 727917 1262441 20/8/2010 No rain 40 Điêp Thường Điêp Thường 224 Điệp.Cường Điệp.Phát 183 No rain Blackshanked douc Pig-tailed macaque 18/8/2010 Vĩnh An No rain No rain Blackshanked douc Surveyor Hà.Hảo.Thường No rain 734567 16/8/2010 17/8/2010 Attitude End 1256953 18/8/2010 33 34 Male Weather No rain 14/8/2010 31 32 Total 16/8/2010 22 28 N Distance (m) Tú Hiệp Phát Tú Phát 166 Điệp.Phát Tú Phát 144 Tú Thường Điêp Thường 95 Điệp.Phát Tú Phát 85 Điệp.Phát Tú Thường No Area date Coordinate Individual Species Time Compass bearing Start 38 39 40 Vĩnh An Vĩnh An 41 42 45 46 Vĩnh An 49 50 Vĩnh An Mã đà 53 54 1257907 Male Fem Infant unknown 21/8/2010 15/9/2010 727144 16/9/2010 726646 17/9/2010 724838 1260107 1258465 1260665 Long-tailed macaque 2 18/9/2010 1257653 Vĩnh An 19/9/2010 Mã đà 19/9/2010 724601 20/9/2010 718930 1251819 20/9/2010 Mã đà Mã đà 21/9/2010 717415 1252382 22/9/2010 22/9/2010 722019 1255435 No rain ko mưa, ẩm kk cao No rain, sunny No rain, sunny No rain, sunny có light rain ko mưa có light rain No rain, sunny No rain, sunny No rain, sunny 1257998 No rain No rain, sunny 41 Attitude Surveyor End Sunny No rain, sunny nhiều mây, ko mưa 18/9/2010 728424 Weather No rain 17/9/2010 51 52 733221 Total 15/9/2010 47 48 N 16/92010 43 44 20/8/2010 E Distance (m) 85 dũng Tân Điệp Cường 145 Điêp Lực Tân.lực 82 Điêp Bảo Tân Bảo 104 Điêp Lực Tân.lực Điêp Lực 86 Tân Bảo 73 Tân Bảo Tân Bảo 93 Điêp Lực Điêp Lực 95 Điêp Lực 79 Tân.lực Điêp Bảo No Area date Coordinate Individual Species Time Compass bearing Start E 55 56 57 58 59 60 61 62 63 64 65 66 69 Total Male Fem Infant unknown Mã đà 24/9/2010 Mã đà 23/9/2010 Hiếu liêm 5/10/2010 Hiếu liêm 5/10/2010 Hiếu liêm 5/10/2010 Hiếu liêm 727119 No rain, sunny No rain, sunny 1251883 23/9/2010 724165 Sunny 1248718 24/9/2010 717261 716478 light rain No rain, sunny No rain, sunny 1245872 1247133 6/10/2010 90 Cloudy 1250749 6/10/2010 101 80 1242726 721304 Blackshanked douc Tú Tùng Hưng Tú Tùng 114 Điệp Đào Tân Đào 74 Tân Luận Điệp Hưng light rain 713059 Điêp Lực Điệp Tân Sunny 7/10/2010 Điệp Tân Tân.lực Sunny 715085 Surveyor Tân Bảo Sunny 6/10/2010 7/10/2010 Attitude foggy 8/10/2010 Hiếu liêm Weather End 21/9/2010 67 68 N Distance (m) Tú Hưng 92 3 7.37' 7.53' LP Sunny Sunny 1240362 8/10/2010 No rain 42 Tân Đào 75 Tân Đào Luận Tú Luận Appendix 4: Records on human impacts No Date 26/7/2010 Listening post LP 01 Coordinate X Y 736579 1270294 Number of people Type of impact Preliminary assest of the impact Surveyor Dũng Ninh 25/7/2010 Hà Ninh 26/7/2010 Hà Phát 27/7/2010 15/8/2010 26/7/2010 27/7/2010 24/7/2010 25/7/2010 24/7/2010 25/7/2010 10 22/7/2010 11 23/7/2010 12 29/7/2010 23/7/2010 13 24/7/2010 14 22/7/2010 15 16 23/7/2010 28/8/2010 LP 02 734954 1271620 Hảo Phát Nông Phương LP 03 734421 Điêp Thường 1269249 Dũng Thường LP 04 738254 Dũng Hà 1268734 Dũng Thường LP 05 739182 Điệp.Phát 1266913 Điệp.Phát LP 06 739011 Dũng Sánh 1262755 LP 07 LP 08 737763 739923 Hunter 1264310 Dũng.Pháp 1264626 Obvison sign Heavy Hảo Nông Điệp Hà LP 09 LP 10 Dũng Sánh 739553 737262 1261332 1262777 Điệp Hảo dũng Hà Phát 43 No Date 17 29/7/2010 18 27/7/2010 19 14/8/2010 20 28/7/2010 21 15/8/2010 22 Listening post S ràng LP 11 LP 12 23 15/8/2010 25 16/8/2010 26 17/8/2010 27 18/8/2010 28 17/8/2010 29 18/8/2010 30 19/8/2010 31 20/8/2010 32 19/8/2010 33 20/8/2010 34 21/8/2010 35 15/9/2010 34 35 16/92010 16/9/2010 X Y 737271 1262779 740328 1262544 Number of people Type of impact Preliminary assest of the impact Surveyor Hà.Hảo.Thường Điệp.Cường Điệp.Phát 16/8/2010 24 Coordinate LP 13 736811 1256634 734697 1258921 03 người 734624 1259896 01 người 734743 1259027 737175 1258846 Hảo Thường 01 người Collecting bamboo shoot Collecting bamboo shoot Not heavy Not heavy Collecting bamboo shoot Not heavy Điêp.Tân.Thường Điêp Thường Điêp Thường Tú Hiệp Phát Tú Phát LP 14 LP 15 LP 16 LP 17 LP 18 LP 19 LP 20 732901 1262808 Điệp.Phát 732904 1262801 Tú Phát 729627 1263575 Tú Thường 729628 1263759 Điêp Thường 730000 1261237 Tú Phát 729992 1261226 Điệp.Phát 727917 1262441 điệp Thường 733222 1257909 tân Dũng 733229 1257902 727679 1259791 727686 727060 1259787 1258136 Điệp Cường Cutting the tree’ branches Điêp Lực Tân.lực Điêp Bảo 44 No Date 36 15/9/2010 37 17/9/2010 38 18/9/2010 39 19/9/2010 40 20/9/2010 41 18/9/2010 42 19/9/2010 43 19/9/2010 44 20/9/2010 45 21/9/2010 46 22/9/2010 47 22/9/2010 48 21/9/2010 49 24/9/2010 50 23/9/2010 51 23/9/2010 52 24/9/2010 53 6/10/2010 54 5/10/2010 55 6/10/2010 56 5/10/2010 Listening post LP 21 LP 22 LP 23 LP 24 LP 25 LP 26 LP 27 LP 28 LP 29 LP 30 Coordinate X Y Number of people Type of impact Hunter Preliminary assest of the impact Surveyor 727060 1258129 725265 1260345 Điêp Lực 725256 1260345 Điêp Lực 725007 1257670 Tân Bảo 725007 1257670 Tân Bảo 728857 1257335 Điêp Lực 728845 1257334 Tân Bảo 720352 1251518 Điêp Lực 720350 1251506 Điêp Lực 717830 1252067 717833 1252061 722445 1255119 Điêp Bảo 722439 1255116 Tân Bảo 727531 1251560 Điệp Tân 727541 1251564 Tân.lực 724553 1248377 Điêp Lực 717723 1245574 Điệp Tân 717723 1245574 Tú Tùng Hưng 716899 1246814 Tú Tùng 716899 1246814 Điệp Đào 715507 1250431 Tân Đào Cutting the tree’ branches Orchid collector 45 Tân Bảo Điêp Lực Tân.lực No Date 57 6/10/2010 58 7/10/2010 59 8/10/2010 60 7/10/2010 61 7/10/2010 62 8/10/2010 Listening post LP 31 Coordinate X Y Number of people Type of impact Preliminary assest of the impact Surveyor 715511 1250407 Tân Luận 713519 1242429 Điệp Hưng Tú Hưng LP 32 Tân Đào LP 33 712723 1240042 Tân Đào Luận 712767 1240066 Tú Luận 46 Appendix 5: Records of other endangered species Coordinate Date Species name 26/7/2010 25/7/2010 27/7/2011 LP 01 Pig tailed macaque Pied hornbill Black shanked douc Pied hornbill Chestnut-necklaced Partridge 27/7/2010 26/7/2010 24/7/2010 25/7/2010 24/7/2010 25/7/2010 25/7/2010 22/7/2010 23/7/2010 29/7/2010 24/7/2010 24/7/2010 23/7/2010 22/7/2010 Location Y 736579 1270294 LP 02 LP 04 LP 05 250m 1271620 297 734847 734425 738607 738607 1268930 1269244 1268388 1268388 178 214 739602 1266591 250 340 240 220 16 40 180 200 180 1000m 739432 1262437 LP 07 738164 740275 740275 739542 739542 739542 1264001 1264500 1264500 1261328 1261328 1261328 37 241 90 280 280 185 20 30m 800m 150m 50m 100m 739542 1261328 241 10m LP 09 Nuber of Indi Weather Total Adult Infant 308 213 Surveyor Dũng Ninh 01 bầy 1 1 No rain No rain No rain No rain 10.40' 5.35' 6.20' 6.38' Hà Ninh 6.40' Nông Phương Thường Dũng Điêp Cường Dũng Hà Dũng Thường No rain No rain No rain light rain No rain 3 1 240 259 Time of survey No rain 271 LP 06 LP Elevation 734954 Gibbon Pig tailed macaque Pig tailed macaque Gibbon Gibbon Great hornbill Pied hornbill Chestnut-necklaced Partridge Chestnut-necklaced Partridge Gibbon Distance 347 216 LP 03 Chestnut-necklaced Partridge Siamese fired-back pheasant Siamese fired-back pheasant Pied hornbill X Compass bearing 15 2 12 2 2 1 No rain No rain No rain No rain No rain No rain No rain light rain light rain No rain No rain No rain No rain 5.40'50 5.42'12 5.47'35 5.34'45 06.26'00 " 5.45' 6.50' 07.09' 5.45' 6.30' Hà Phát Điệp ,Phát Dũng, Sành Dũng Hà Dũng.Pháp Hảo Nông Điệp, Hảo 6.36' No rain 739542 739553 1261328 1261332 195 285 50m 300 m 1 47 1 No rain 7.06' 6.39'26" Điệp, Hà Note Coordinate Date 22/7/2010 22/7/2010 Species name Gaur Chestnut-necklaced Partridge 28/7/2010 29/7/2010 26/7/2010 27/7/2010 14/8/2010 28/7/2010 28/7/2011 28/7/2012 28/7/2010 14/8/2010 LP 10 Black shanked douc Chestnut-necklaced Partridge Chestnut-necklaced Partridge Gibbon Pied hornbill Chestnut-necklaced Partridge Elephant Civet 15/8/2010 16/8/2010 Pied hornbill Great hornbill 15/8/2010 16/8/2010 17/8/2010 17/8/2010 18/8/2010 19/8/201 20/8/2010 19/8/2010 20/8/2010 21/8/2010 24/7/2010 Location Suoi Rang LP 11 LP 12 LP 13 Pied hornbill Great hornbill Germain's Peacock-Pheasant Pied hornbill Great hornbill LP 14 LP 15 LP 16 LP 17 LP 18 Chestnut-necklaced Partridge X 740114 Y 1262856 739432 737262 1262437 126277 737271 1262779 740749 1262225 Compass bearing 280 Distance Elevation 30m Nuber of Indi Weather Total Adult 2 Infant 239 Time of survey No rain Dũng Sánh light rain Dũng Sánh No rain No rain Hà Dũng Pháp 93 102 100m 150 180 224 2 Surveyor No rain No rain 14.40'35" Hà.Hảo.Thường Điệp.Cường 5.17'30 Điệp.Phát 5.9'15 6.44'30" 6.55'00" điệp phát No rain 736807 1256638 736811 1256634 736586 1257772 734559 1260017 734565 737175 737175 1260030 1258846 1258846 732901 729627 729628 730000 1262808 1263575 1263759 1261237 729992 1261226 727917 733222 733229 1262441 1257909 1257902 734477 1269447 310 35 70 300m 20m 234 At LP 20m 1 1 1 1 light rain No rain No rain No rain 2 2 No rain light rain light rain 119 120 240 265 175 100 80 Hảo Thường 30 80 240 98 15 30 90 12 15 80 166 144 128 92 82 85 85 84 48 7.1' 5.51'19 6.24'15 No rain 183 10 90 8.01'00" 5.55 6.30' 2 2 2 2 2 1 No rain No rain No rain No rain No rain No rain No rain No rain No rain 6.40'10 6.34'15 5.59'10 8.20' 8.21' 5.23'18 10.10' Tú.Tân.Hiệp Điêp.Tân.Thường điệp Thường Tú Hiệp Phát tú Phát điệp phát Tú Thường Điêp Thường Tú Phát Điệp.Phát điệp Thường dũng Tân Điệp Cường Dũng Hà Note Coordinate Date 24/7/2010 25/7/2010 Species name Civet Gibbon 15/9/2010 16/9/2010 LP 19 Pig tailed macaque 16/9/2010 15/9/2010 17/9/2010 LP 20 Orange-necked Partridge 19/9/2010 Distance 185 10m Elevation Weather 130 No rain Điêp Lực 727686 1259787 145 No rain Tân.lực 727060 1258136 65 No rain Điêp Bảo 727060 1258129 1260345 Adult 1257670 Note Dũng Thường Dũng Thường Tân Bảo 104 1 104 1 85 2 No rain 85 1 No rain Điêp Lực di chuyển ủi, foot print At the LP 50 91 725007 10.20' 8.27' 50 250 LP 22 Infant Surveyor 1259791 725265 Total Time of survey 727679 At the LP At the LP LP 21 Nuber of Indi Y 1269425 1266431 Pied hornbill Chestnut-necklaced Partridge Pied hornbill Orange-necked Partridge Compass bearing X 734579 739772 Longtailed macaque Wild boar 18/9/2010 Location 190 40 104 56 90 70 Tân.lực heard heard No rain 1 No rain 1 No rain No rain Tân Bảo Orange-necked Partridge 20/9/2010 18/9/2010 Pied hornbill Chestnut-necklaced Partridge LP 23 17/9/2010 19/9/2010 20/9/2010 21/9/2010 86 LP 24 LP 25 heard Điêp Lực 728857 1257335 210 100 728845 1257334 91 No rain 720352 1251518 93 No rain 720350 717830 1251506 1252067 96 95 No rain No rain 49 heard Tân Bảo Điêp Lực Điêp Lực Coordinate Date Species name Location 22/9/2010 21/9/2010 22/9/2010 Pied hornbill Red jungle fowl Siamese fired-back pheasant LP 26 X Y 717833 1252061 722445 1255119 722439 1255116 727531 1251560 Compass bearing Distance Elevation Nuber of Indi Weather Total Adult Infant Time of survey Surveyor Tân.lực Flight over 70 50 346 70 70 79 1 1 No rain Điêp Bảo Tân Bảo Điêp Bảo No rain 24/9/2010 Điệp Tân No rain 23/9/2010 LP 27 23/9/2010 LP 28 24/9/2010 5/10/2010 727541 1251564 90 724553 1248377 724553 717723 1248377 1245574 101 717723 1245574 716899 716899 715507 Tân.lực No rain No rain, humid light rain Điêp Lực 80 No rain Tú Tùng 1246814 1246814 1250431 114 112 74 No rain No rain No rain Điệp Đào Tân Đào Tân Luận 715511 713519 713519 1250407 1242429 1242429 70 92 65 No rain light rain Điệp Hưng Tú Hưng Tân Đào 712723 1240042 712767 1240066 Điệp Tân Tú Tùng Hưng LP 29 6/10/2010 LP 30 5/10/2010 6/10/2010 5/10/2010 LP 31 6/10/2010 7/10/2010 8/10/2010 Gaur 7/10/2010 Siamese fired-back pheasant 8/10/2010 LP 32 LP 33 Note At the LP 270 50 120 70 75 62 50 10 2 Tân Đào Luận No rain Tú Luận di chuyển heard heard CENTRE FOR NATURAL RESOURCES AND ENVIRONMENTAL STUDIES (CRES) 51 ... Nong, Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam Fauna & Flora International/Conservation International, Hanoi, Vietnam. .. Location of listening posts surveyed in Dong Nai NR 13 Results of survey effort in Vinh An sector A total of 23 listening posts were surveyed in Vinh An sector with 47 consecutive survey days in August... for Dong Nai NR staff in gibbon survey techniques and reporting; - Undertake a field survey for gibbons in Dong Nai NR; - Produce a report on the gibbon population in Dong Nai NR and associated