Analysis of fecal nutrients and particle size in captive proboscis monkeys ( Nasalis larvatus ) fed seasonal dietary foliage at a Japanese zoo

2021 ◽  
Vol 92 (1) ◽  
Author(s):  
Ryuta Kawasaki ◽  
Maki Kawakita ◽  
Kenta Kurosawa ◽  
Sanae Asano ◽  
Hiroshi Kajikawa
Keyword(s):  
Particle Size ◽  
Nasalis Larvatus ◽  
Proboscis Monkeys

scholarly journals Faecal Particle Size in Free-Ranging Proboscis Monkeys, Nasalis larvatus: Variation between Seasons

2018 ◽  
Vol 89 (5) ◽  
pp. 327-334 ◽  
Author(s):  
Valentine Thiry ◽  
Marcus Clauss ◽  
Danica J. Stark ◽  
Roseline C. Beudels-Jamar ◽  
Régine Vercauteren Drubbel ◽  
...  
Keyword(s):  
Particle Size ◽  
Nasalis Larvatus ◽  
Free Ranging ◽  
Proboscis Monkeys

Helminth parasites occurrence in wild proboscis monkeys ( Nasalis larvatus ), endemic primates to Borneo Island

2019 ◽  
Vol 48 (6) ◽  
pp. 357-363
Author(s):  
Madinah Adrus ◽  
Ramlah Zainuddin ◽  
Nur Hidayah Ahmad Khairi ◽  
Mariana Ahamad ◽  
Mohd‐Tajuddin Abdullah
Keyword(s):  
Helminth Parasites ◽  
Nasalis Larvatus ◽  
Proboscis Monkeys

scholarly journals Population of Proboscis Monkey (Nasalis lavatus) in Manggar River, Balikpapan City, Indonesia

2021 ◽  
Vol 886 (1) ◽  
pp. 012068
Author(s):  
Ike Mediawati ◽  
Teguh Muslim ◽  
Amir Ma’ruf ◽  
Mukhlisi ◽  
Hery Seputro ◽  
...  
Keyword(s):  
Population Density ◽  
Sex Ratio ◽  
Anthropogenic Activities ◽  
Proboscis Monkey ◽  
Adult Males ◽  
Conservation Area ◽  
Nasalis Larvatus ◽  
Survey Technique ◽  
Males And Females ◽  
Proboscis Monkeys

Abstract A population estimation of proboscis monkeys (Nasalis larvatus) has been conducted in Manggar River, Balikpapan. In this non-conservation area, the anthropogenic activities threaten the proboscis monkey habitat. Boat survey technique was applied along ± 17 km of the river in the morning and evening. The number of proboscis monkeys in the surveyed area was estimated to range from 57 to 69 individuals with estimated population density of 4.75 individuals/Km2. Moreover, the population of this primates was divided into 4 groups and the sex ratio between adult males and females was 1:2.33. The proboscis monkeys were distributed in the middle of the river to the upstream. The highest population was found in the upstream area with less human activities. Conservation efforts in the Manggar River need to be carried out considering the proboscis monkey habitat in the area has been fragmented and isolated. These efforts could involve local economic communities.

scholarly journals First description of male worms of Enterobius (Colobenterobius) serratus (Nematoda: Oxyuridae), the pinworm parasite of proboscis monkeys

Zootaxa ◽  
2020 ◽  
Vol 4722 (3) ◽  
pp. 287-294
Author(s):  
HIDEO HASEGAWA ◽  
LIESBETH FRIAS ◽  
SURDENSTEEVE PETER ◽  
NOOR HALIZA HASAN ◽  
DANICA J. STARK ◽  
...  
Keyword(s):  
Wildlife Sanctuary ◽  
Nasalis Larvatus ◽  
Lower Kinabatangan ◽  
First Time ◽  
Malaysian Borneo ◽  
Proboscis Monkeys

Males of Enterobius (Colobenterobius) serratus Hasegawa et al., 2003 (Nematoda: Oxyuridae) are described for the first time based on six individuals collected from the feces of proboscis monkeys, Nasalis larvatus, in the Lower Kinabatangan Wildlife Sanctuary, Sabah, Malaysian Borneo. The males show identical cephalic morphology to females, being readily distinguishable from their congeners by the serrated inner margins of the lips. The bicolored esophageal corpus, long thin spicule and developed spicular pouch with paired muscular bands are also remarkable characteristics, presumably shared by other Asian members of the subgenus. 

scholarly journals Factors influencing riverine utilization patterns in two sympatric macaques

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yosuke Otani ◽  
Henry Bernard ◽  
Anna Wong ◽  
Joseph Tangah ◽  
Augustine Tuuga ◽  
...  
Keyword(s):  
Aquatic Environment ◽  
Ecological Factors ◽  
Predation Pressure ◽  
Macaca Nemestrina ◽  
Nasalis Larvatus ◽  
Factors Affecting ◽  
Ecological Characteristics ◽  
Riverine Habitat ◽  
Utilization Patterns ◽  
Proboscis Monkeys

AbstractMany species of terrestrial animals, including primates, live in varied association with the aquatic (e.g., riverine or coastal) environment. However, the benefits that each species receive from the aquatic environment are thought to vary depending on their social and ecological characteristics, and thus, elucidating those benefits to each species is important for understanding the principles of wild animal behaviour. In the present study, to gain a more complete picture of aquatic environment use, including social and ecological factors in primates, factors affecting riverine habitat utilization of two macaque species (Macaca nemestrina and M. fascicularis) were identified and qualitative comparisons were made with sympatric proboscis monkeys (Nasalis larvatus), which have different social and ecological characteristics. Temporal variation in sighting frequency of macaques at the riverbanks was positively related to the fruit availability of a dominant riparian plant species and negatively related to the river water level which affects the extent of predation pressure. Riverine utilization of macaques was greatly influenced by distribution and abundance of food (especially fruit) resources, possibly in association with predation pressure. Additionally, qualitative ecological comparisons with sympatric proboscis monkeys suggest that the drivers of riverine utilization depend on the feeding niches of the species, and different anti-predator strategies resulting from their differing social structures.

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