scholarly journals Ecology and Conservation of the Laotian langur Trachypithecus laotum in a Protected Area of Laos (Southeast Asia)

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 231
Author(s):  
Johnny Souwideth ◽  
Phaivanh Phiapalath ◽  
Hai Dong Thanh ◽  
Peter Brakels ◽  
Thong Pham Van ◽  
...  
Keyword(s):  
Protected Area ◽  
Democratic Republic ◽  
Conservation Status ◽  
Niche Partitioning ◽  
Lao Pdr ◽  
Iucn Red List ◽  
Primate Species ◽  
Field Surveys ◽  
Competition For Food ◽  
High Threat

Terrestrial species from the Lao People’s Democratic Republic (PDR) are under high threat due to deforestation and overhunting. Previous studies have even defined these forests as subjected to an “empty forest syndrome”, a condition in which forests that are apparently well preserved are instead almost deprived of vertebrate faunas due to extreme exploitation by local communities. Forest specialists, including several primates, are among the most threatened species in the country. The Laotian langur (Trachypithecus laotum) is endemic to Lao PDR, is listed as Endangered by the IUCN Red List, and it is one of the least studied species in the region. A survey on the local distribution, life history and conservation status of the Laotian langur was carried out in Phou Hin Poun National Protected Area, Khammouane Province of Lao PDR. The survey consisted of an initial phase with interviews to select key informants on the Laotian langur and the other primate species of the area. Then, a phase of field surveys along forest transects, totaling 64.1 km of 21 transects, yielded a record of 35 individuals in 9 groups. The highest encounter/detection rate of the Laotian langur was 1 group per km at one sector of the park. In contrast, it was much lower (0.18–0.34 groups/km) in the rest of the protected area. The group sizes were much lower than those observed in the same area between 1994 and 2010, thus suggesting a decline in the population size of langurs. This decline may be linked to habitat loss (timber extraction and mining). Still, also overhunting, as signs of poaching were observed during our field surveys. This was also supported by the reports of our interviewees. Laotian langurs were observed to be sympatric and interact while foraging with the Assamese macaque (Macaca assamensis). In the cases of sympatric occurrence between the two species, we observed that subtle mechanisms of niche partitioning may occur to reduce interspecific competition for food. Further research on the population and ecology of this endangered langur should be conducted to understand the species and aid its conservation.

scholarly journals An assessment of the distribution and conservation status of hornbill species in Thailand

Oryx ◽  
2013 ◽  
Vol 47 (3) ◽  
pp. 441-450 ◽  
Author(s):  
Yongyut Trisurat ◽  
Vijak Chimchome ◽  
Anak Pattanavibool ◽  
Sitthichai Jinamoy ◽  
Siriporn Thongaree ◽  
...  
Keyword(s):  
Protected Area ◽  
Patch Size ◽  
Conservation Management ◽  
Conservation Status ◽  
Iucn Red List ◽  
Small Population ◽  
Red List ◽  
Land Area ◽  
Field Surveys ◽  
Maximum Entropy Modelling

AbstractMany hornbill species in Thailand are categorized as Endangered or Critically Endangered on the IUCN Red List. The objectives of this research were to predict hornbill distributions in Thailand and to assess the national conservation status of the species using extent of occurrence. We employed maximum entropy modelling, using 10 environmental variables that were believed to directly or indirectly influence hornbill distributions across Thailand, to predict the habitats potentially suitable for 10 of the country's 13 hornbill species. Data on the presence of hornbills were gathered from the Thailand Hornbill Project and additional field surveys in protected area complexes during 2004–2006. The results indicated that patch size is the most important factor affecting distribution, followed by latitude, ecoregion and distance to villages. All hornbill species were predicted to occur primarily in intact protected area complexes. The total extent of all hornbill habitats covers 9.3% of the country's land area. Seven of the 10 modelled species are at risk and the current distribution pattern is expected to reflect stochastic extinctions because of small population size. We recommend that the conservation status of Austen's brown hornbill Anorrhinus austeni and Tickell's brown hornbill Anorrhinus tickelli should be changed from Vulnerable to Endangered. The model identified five protected area complexes as hornbill hotspots in Thailand. These findings will help guide conservation management.

scholarly journals The western black crested gibbon Nomascus concolor in Laos: new records and conservation status

Oryx ◽  
2005 ◽  
Vol 39 (3) ◽  
pp. 311-317 ◽  
Author(s):  
Arlyne Johnson ◽  
Sarinda Singh ◽  
Malaykham Duangdala ◽  
Michael Hedemark
Keyword(s):  
Public Education ◽  
Protected Area ◽  
Forest Cover ◽  
New Records ◽  
Southern China ◽  
Conservation Status ◽  
Lao Pdr ◽  
Human Populations ◽  
Community Based ◽  
Nomascus Concolor

Few viable populations of western black crested gibbon Nomascus concolor remain in southern China and northern Indochina, where the species is endemic. We conducted village surveys in the Nam Ha National Protected Area in Luang Namtha Province, Lao PDR to assess presence and status of gibbon populations. Forest surveys used to verify gibbon presence and species identification confirmed village reports of gibbon populations in three locations, and sonogram analysis identified all as N. concolor. These represent an expansion in the known distribution of western black crested gibbon in Lao PDR and the only known populations to occur inside the national protected area system. Significantly longer times since gibbons were last reported were associated with villages with <50% forest cover and high human populations. Although village taboos regarding gibbon hunting were reported, hunting and trade were nevertheless identified as factors contributing to gibbon decline. Results indicated that increased community-based management, public education and enforcement are needed to maintain N. concolor populations and their habitat in Lao PDR.

scholarly journals Capparis macrantha sp. nov. (Capparaceae, Brassicales), a new shrub species from a deciduous forest of the Nam Kading National Protected Area (central Lao PDR)

2020 ◽  
Author(s):  
Keooudone Souvannakhoummane ◽  
Silvio Fici ◽  
Soulivanh Lanorsavanh ◽  
Jeong Ho Park ◽  
Ho Sang Kang ◽  
...  
Keyword(s):  
New Species ◽  
Protected Area ◽  
Deciduous Forest ◽  
Conservation Status ◽  
Lao Pdr ◽  
Shrub Species

Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov., a new shrub species characterized by erect or ascending habit, stipular thorns, large lanceolate-elliptic leaves and large flowers in supra-axillary rows, is described and illustrated from the deciduous forest in Nam Kading National Protected Area (central Lao PDR). The new species belongs to Capparis sect. Monostichocalyx Radlk. and is morphologically similar to C. radula Gagnep., a shrub widespread in the Indochinese area, differing in the shorter, straight stipular thorns, larger leaves, larger sepals and petals, higher number of stamens with longer filaments and longer gynophore and ovary. Its affinities with related taxa are discussed and a key is provided for the species of Capparis L. known from Lao PDR. The conservation status of the new species is provisionally assessed as Vulnerable (VU D1).

scholarly journals Capparis macrantha sp. nov. (Capparaceae, Brassicales), a new shrub species from a deciduous forest of the Nam Kading National Protected Area (central Lao PDR)

2020 ◽  
Author(s):  
Keooudone Souvannakhoummane ◽  
Silvio Fici ◽  
Soulivanh Lanorsavanh ◽  
Jeong Ho Park ◽  
Ho Sang Kang ◽  
...  
Keyword(s):  
New Species ◽  
Protected Area ◽  
Deciduous Forest ◽  
Conservation Status ◽  
Lao Pdr ◽  
Shrub Species

Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov., a new shrub species characterized by erect or ascending habit, stipular thorns, large lanceolate-elliptic leaves and large flowers in supra-axillary rows, is described and illustrated from the deciduous forest in Nam Kading National Protected Area (central Lao PDR). The new species belongs to Capparis sect. Monostichocalyx Radlk. and is morphologically similar to C. radula Gagnep., a shrub widespread in the Indochinese area, differing in the shorter, straight stipular thorns, larger leaves, larger sepals and petals, higher number of stamens with longer filaments and longer gynophore and ovary. Its affinities with related taxa are discussed and a key is provided for the species of Capparis L. known from Lao PDR. The conservation status of the new species is provisionally assessed as Vulnerable (VU D1).

THE CONSERVATION STATUS OF BATS (MAMMALIA: CHIROPTERA) IN CAT BA NATIONAL PARK, NORTHERN VIETNAM

2020 ◽  
Vol 65 (10) ◽  
pp. 92-98
Author(s):  
Thong Vu Dinh ◽  
Southaphan Sichanh ◽  
Nha Pham Van
Keyword(s):  
National Park ◽  
Conservation Status ◽  
Taxonomic Status ◽  
Iucn Red List ◽  
Current Status ◽  
Future Research ◽  
Field Surveys ◽  
Northern Vietnam ◽  
Literature Reviews ◽  
Conservation Actions

Prior to the present study, literature reviews revealed that 31 species of bats belonging to six families and 14 genera were identified in Cat Ba National Park in Northern Vietnam However, the conservation status of many species remains unclear and is still subject to debate. Among the 31 species, 11 are common while the remainder have been rarely captured since 1942. At least two species, Hipposideros alongensis and H. khaokhouayensis, which are globally considered vulnerable, are very common in Cat Ba National Park. This paper provides an update on the current status of each species based on data from recent field surveys with reference to previous publications and the current IUCN Red List (iucnredlist.org). Results from the recent surveys included eight individuals provisionally identified as Myotis cf. pilosus. The taxonomic status of five species (Aselliscus dongbacanus, Hipposideros gentilis, Hipposideros grandis, Miniopterus magnater, Murina harrisoni) are updated following recent assessments. This information will inform future research and conservation actions.

scholarly journals ‘Non-protected’ primates as bushmeat, pets and pests in southeastern Democratic Republic of Congo

2019 ◽  
Vol 11 (3) ◽  
pp. 13251-13260
Author(s):  
Paul Kaseya Kazaba
Keyword(s):  
Legal Status ◽  
Democratic Republic ◽  
Democratic Republic Of Congo ◽  
Iucn Red List ◽  
Red List ◽  
Primate Species ◽  
Wild Populations ◽  
Republic Of Congo ◽  
Country Level ◽  
Urban Markets

This article reports the uses of primates in a fast-expanding city, and human-primate interactions in the vicinity of a protected area in southeastern Democratic Republic of Congo (DRC).  Surveys in markets, households and restaurants suggested that primate meat is frequently sold and consumed in the city of Lubumbashi.  Carcasses of diurnal monkeys accounted for almost 10% of the total weight of smoked bushmeat sold between March and July 2016 in urban markets, and in 21% of households the last bushmeat consumed prior the date of the survey was of a primate species.  Kinda Baboons Papio kindae, Malbrouck Monkeys Chlorocebus cynosuros and Blue Monkeys Cercopithecus mitis were found illegally kept as pets.  Occasional observations and questionnaire surveys carried out in both the Sector North of Upemba National Park and its neighboring areas, indicated wild populations of these species which were mentioned as “pest primates” by 73% of respondents.  There is no compensation scheme for damages caused by wildlife to crops, and culling problematic animals was listed by a majority (70%) of respondents as the most effective way to repel crop-raiding primates.  Given the current population growth, and considering the increasing spatial overlap between human activities and wildlife, wild populations of these primates are no doubt at risk, but all the three species belong to the Least Concern category on the latest version of the IUCN Red List.  The Blue Monkey is a ‘partially protected’ species in DRC, while the two other benefit from less strict conservation measures and their legal status of ‘non-protected’ remains.  This situation illustrates the necessity of updating legal status and establishing a Red List of species at the country level.

scholarly journals Conservation status of the unique population of Wenchengia alternifolia, an enigmatic plant endemic to Hainan Island, China

Oryx ◽  
2014 ◽  
Vol 48 (3) ◽  
pp. 354-357 ◽  
Author(s):  
Bo Li ◽  
Zhiyong Zhang ◽  
Dianxiang Zhang
Keyword(s):  
Plant Species ◽  
Ex Situ Conservation ◽  
Conservation Status ◽  
Hainan Island ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Ex Situ ◽  
Field Surveys ◽  
Remnant Population

AbstractWenchengia alternifolia (Lamiaceae) is a plant species endemic to Hainan Island, China. Since the 1930s it was known from only four collections and was believed to be extinct until a remnant population was rediscovered in 2010. We conducted further field surveys during 2010–2012 but located only one population, with 66 individuals. W. alternifolia is restricted to the c. 1,500 m2 Shuangximu Valley, in a harsh microenvironment surrounded by plantations. As the population comprises < 50 mature individuals, we propose that W. alternifolia be categorized as Critically Endangered on the IUCN Red List, based on criterion D. We recommend that the remnant population and its habitat need urgent protection and monitoring and that ex situ conservation, for future reintroduction, should be implemented.

scholarly journals Conservation status of the narrow endemic gypsophile Ononis tridentata subsp. crassifolia in southern Spain: effects of habitat disturbance

Oryx ◽  
2013 ◽  
Vol 47 (2) ◽  
pp. 199-202 ◽  
Author(s):  
Miguel Ballesteros ◽  
Ana Foronda ◽  
Eva María Cañadas ◽  
Julio Peñas ◽  
Juan Lorite
Keyword(s):  
Population Size ◽  
Seedling Recruitment ◽  
Conservation Status ◽  
Iucn Red List ◽  
Endemic Plant ◽  
Negative Effects ◽  
Field Surveys ◽  
Narrow Endemic ◽  
Area Of Occupancy ◽  
Species Area

AbstractOnonis tridentata L. subsp. crassifolia (Leguminosae) is a narrow endemic plant restricted to gypsum outcrops in south-east Spain. Its habitat and populations are currently threatened by anthropogenic disturbance. Because of the paucity of information concerning its distribution, abundance and response to disturbance, we assessed its status and evaluated the impacts of quarrying, ploughing, grazing and afforestation. Distribution and population size were estimated by field surveys, censuses and mapping. We measured cover, plant volume, fruit and seed production, seed predation and seedling recruitment to asses any effects of disturbance. The species’ area of occupancy is 1.6 km2 and its extent of occurrence 337 km2, in 29 habitat patches and 16 populations between 705 and 1,125 m altitude, and its population size was estimated to be 531,605. Quarrying, ploughing, overgrazing and afforestation negatively affected the species, in this order. We recommend this subspecies be categorized as Vulnerable on the IUCN Red List. A species recovery plan is required, and the ecological restoration of altered areas would mitigate negative effects on the species and improve the overall conservation of gypsum habitats.

Studies on the genus Capparis L. (Capparaceae) in Lao PDR. IV: A new species from the Khammouan Province

Phytotaxa ◽  
2020 ◽  
Vol 429 (1) ◽  
pp. 73-79 ◽  
Author(s):  
SILVIO FICI ◽  
KEOOUDONE SOUVANNAKHOUMMANE ◽  
SOULIVANH LANORSAVANH ◽  
VICHITH LAMXAY
Keyword(s):  
New Species ◽  
Protected Area ◽  
Leaf Blade ◽  
Conservation Status ◽  
Lao Pdr ◽  
A New Species ◽  
Forest Habitats

A new species of Capparis, C. florida, is described and illustrated from the Hin Nam No National Protected Area, Khammouan Province in central Lao PDR. The new species, collected in forest habitats of the Khammouan karst, belongs to sect. Monostichocalyx. It is an erect shrub characterized by the widely ovate or elliptical leaf-blade, by the flowers serial in supra-axillary rows, and by the slender ovary with evident style. Its affinities with related taxa, such as the widespread C. micracantha, are discussed and its conservation status assessed.

scholarly journals Giant otter Pteronura brasiliensis density and abundance in Llanos Orientales de Colombia in the Orinoco basin

Oryx ◽  
2020 ◽  
pp. 1-4
Author(s):  
Germán Garrote ◽  
Beyker Castañeda ◽  
Jose Manuel Escobar ◽  
Laura Pérez ◽  
Brayan Marín ◽  
...  
Keyword(s):  
South America ◽  
Population Size ◽  
20Th Century ◽  
Conservation Status ◽  
Species Conservation ◽  
Iucn Red List ◽  
Red List ◽  
Recreational Fishing ◽  
Pteronura Brasiliensis ◽  
Direct Counts

Abstract The giant otter Pteronura brasiliensis, categorized as Endangered on the IUCN Red List, was once widely distributed throughout South America. By the middle of the 20th century the giant otter had become locally extinct along the main rivers of the Orinoco basin. Although some populations seem to have recovered, the paucity of information available does not permit a full evaluation of the species' conservation status. The objective of this study was to estimate the abundance and density of the giant otter population along the Orinoco river in the municipality of Puerto Carreño, Vichada, Colombia, where there is important commercial and recreational fishing. Thirty-nine linear km were surveyed, repeatedly, with a total of 315 km of surveys. Population size was estimated by direct counts of individuals. All individuals detected were photographed and identified individually from their throat pelage patterns. In total, 30 otters were identified, giving a minimum density of 0.77 individuals per km, one of the highest reported for the species in Colombia. Given the high density in this well-developed area, our results highlight the importance of this population for the conservation of the species.

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