Carl Traeholt

Copenhagen Zoo

Dholes (Cuon alpinus) are endangered large carnivores found in scattered populations in Asia. One of the main threats to dholes is the decreasing prey availability throughout their distribution range. In the present study, we used camera trap data collected over 6 years to investigate the temporal activity patterns of dholes and their putative prey...

Information on tropical Asian vertebrates has traditionally been sparse, particularly when it comes to cryptic species inhabiting the dense forests of the region. Vertebrate populations are declining globally due to land‐use change and hunting, the latter frequently referred as “defaunation.” This is especially true in tropical Asia where there is...

Presbytis chrysomelas cruciger (Thomas, 1892) is a Critically Endangered langur subspecies that has rarely been studied due to the difficulty of encountering it in the wild. Previously, this subspecies was sighted in Maludam National Park, Sarawak, Malaysian Borneo. Here, we provide the first sighting record of P. c. cruciger in Jemoreng Protected...

The dhole (Cuon alpinus) is the only canid species native to Indonesia and also the only pack-living large carnivore. It is classified as Endangered by the IUCN with numbers believed to be decreasing throughout their range, yet dholes have received very little scientific and conservation attention compared to other large carnivores in Indonesia. Kn...

The leopard cat (Prionailurus bengalensis) is the most widespread feline in Asia. It has been recorded in a range of habitats, including monoculture landscapes, such as oil palm plantations. Here, we report on a study on the presence, home range, activity patterns and diet of the species in an oil palm landscape to assess their viability as biologi...

Historically, orangutans ( Pongo spp.) lived in large contiguous areas of intact rainforest. Today, they are also found in highly modified and fragmented landscapes dominated by oil palm or industrial timber plantations; a situation that calls for new conservation approaches. Here we report signs of orangutan presence in more than 120 small forest...

Wildlife surveys were conducted in Usun Apau National Park (UANP), Sarawak from Oct 2017 to Oct 2020. This was the first attempt to document fauna diversity in Usun Apau National Park on the UANP plateau at 1200-1400 m a.s.l. On 17 September 2020, 10 AM, we observed an orangutan individual, Pongo pygmaeus , over a period of one minute at Libut Camp...

Natural mineral licks are used by many species throughout the world but information relating to the use of artificial saltlicks for wildlife conservation and management is scant. The Department of Wildlife and National Parks in Peninsular Malaysia has established more than 30 artificial saltlicks intended to enrich the habitat with additional miner...

The effect of food provisioning on ranging patterns of long-tailed macaques (Macaca fascicularis) in non- anthropogenic areas is largely unknown, as most published studies have focused on urban macaques. In this study, we quantified habitat selection, daily path length and home range size in long-tailed macaques in Baluran National Park, East Java,...

Orangutans (Pongo spp.) occur at low densities and therefore large areas are necessary to sustain viable metapopulations, defined here as sets of conspecific units of individuals linked by dispersal. Historically, orangutans lived in large contiguous areas of intact rainforest, but are now increasingly found in agricultural and other landscapes mod...

Study on habitat use patterns of Malayan Tapir (Tapirus indicus) is one of wildlife management strategies employed by the Department of Wildlife and National Parks in Peninsular Malaysia (DWNP). Habitat utilization of an adult Malayan tapir was studied using wildlife tracking satellite collar from May to December 2016 in Senaling Inas Forest Reserv...

Knowledge about distribution of primate species and their densities is crucial for conservation and management. However, such information is often lacking or anecdotal, even for seemingly abundant species. Long‐tailed macaques (Macaca fascicularis) are distributed across southeast Asia and recognized by the International Union for Conservation of N...

The translocation of mammal species from areas that threaten their survival is one of the several wildlife management strategies currently employed by the Department of Wildlife and National Parks in Peninsular Malaysia. This preliminary study on the activity pattern of a male Malayan Tapir (Tapirus indicus) fitted with a satellite collar reports t...

The use of environmental DNA (eDNA) has become an applicable non‐invasive tool with which to obtain information about biodiversity. A sub‐discipline of eDNA is iDNA (invertebrate‐derived DNA), where genetic material ingested by invertebrates is used to characterise the biodiversity of the species that served as hosts. While promising, these techniq...

Cheetah (Acinonyx jubatus) populations are subjected to a variety of complex, interacting anthropogenic and natural pressures. Understanding the causes of population decline is essential for being able to develop management strategies aimed at arresting the decline or reversing negative trends. Population Viability Analysis (PVA) uses computer mode...

The translocation of mammal species from areas that threaten their survival is one of several wildlife management strategies currently employed by the Department of Wildlife and National Parks in Peninsular Malaysia. This preliminary study on the movement activities of a male Malayan Tapir (Tapirus indicus) fitted with a satellite collar reports th...

We conducted a preliminary non-invasive experiment using 12 land leech (Family: Haemadipsidae) specimens from Belum State Park, Perak in identifying their prey species especially wildlife species. Land leech specimens were collected by Rhino Survey team from Conservation Biodiversity Division and preserved in absolute alcohol. DNA extraction was do...

This paper will discuss the history of MTCP from 2002 until now which include the project team, research aspect covered and papers published. It will also enlist the challenge faced in the future.

The study on ecology and feeding behaviour of selected wildlife species was carried out at the Krau Wildlife Reserve (KWR), Pahang. We aim to identify the wildlife species that present at KWR using camera traps, determine activity pattern ofungulates and study the feeding behaviour of selected herbivores including foraging time, method or behaviour...

The endangered Asian tapir (Tapirus indicus) is threatened by large-scale habitat loss, forest fragmentation and increased hunting pressure. Conservation planning for this species, however, is hampered by a severe paucity of information on its ecology and population status. We present the first Asian tapir population density estimate from a camera...

In 2008, the IUCN threat status of the Asian tapir (Tapirus indicus) was reclassified from 'vulnerable' to 'endangered'. The latest distribution map from the IUCN Red List suggests that the tapirs' native range is becoming increasingly fragmented in Peninsular Malaysia, but distribution data collected by local researchers suggest a more extensive g...

The elimination of the largest herbivores (elephants and rhinoceroses) from many forests in tropical East Asia may have severe consequences for plant species that depend on them for seed dispersal. We assessed the capacity of Malayan tapirs Tapirus indicus—the next largest nonruminant herbivore in the region—as a substitute for the lost megafauna i...

- A study on Tapir displaced from their habitats was conducted by the Department between 2006 to 2010. A total of 142 cases of Tapir displaced from its natural habitat was recorded during the study period. Habitat disturbance and fragmentation are the main factors forcing the tapir out of its habitat to seek for food near forest fringes and agricul...

The Round-table on Sustainable Palm Oil (RSPO) Principle and Criteria (P&C) took effect in 2007. Since then, 5% of the RSPO oil has been certified as 'sustainably produced'. Nevertheless, deforestation continues at an alarming rate, leading to intensified criticism of the palm oil industry' s practices. This study assesses members' capacity to comp...

Background: The flat-headed cat (Prionailurus planiceps) is one of the world's least known, highly threatened felids with a distribution restricted to tropical lowland rainforests in Peninsular Thailand/Malaysia, Borneo and Sumatra. Throughout its geographic range large-scale anthropogenic transformation processes, including the pollution of fresh...

The song structure of pileated gibbons (Hylobates pileatus) was studied in eight locations in southwestern Cambodia. Male and female vocalizations were recorded daily between 07:00 and 13:00 for five consecutive days at each. The results showed that peak calling activity occurs around 10:00, with slight variation between different locations. A fema...

Comparison of 321 bp long mtDNA cytochrome b sequences of wild and captive Malayan tapir (Tapirus indicus)revealed low variation among the individuals investigated. Phylogenetic analyses using distance (neighbor-joining) analysis supported the monophyletic status of the Malayan tapir. Two haplotypes were identified out of 13 Malayan tapir analyzed.

Preliminary findings from the 2002/2003 dry season survey of the Southern Cardamoms and Botum-Sakor Peninsula confirm that in spite of heavy logging and hunting pressures in recent years, this area still contains nationally significant biodiversity, including important populations of endemic and endangered plants and animals. It should be a high pr...

 Five water monitor lizards, Varanus salvator salvator, and four clouded monitor lizards, Varanus bengalensis nebulosus, were caught on Tioman island in Malaysia. A radio-thermistor transmitter was implanted into the buccal cavity of each animal, and they were released into an enclosure measuring 5.5 × 6.5 metres. The lizards were observed for 9 an...

Fecal pellets of Varanus b. nebulosus were collected and analysed on Pulau Eoman in the South China Sea, Malaysia. The stomachs of 16 captured V. b. nebulosus were flushed with water and the contents analysed. It was found that their main diet consists of insects, invertebrates and occasionally small vertebrates such as geckos and juvenile sun liza...

Eight water monitor lizards, Varanus s. salvator, were captured; four individuals from an oil palm estate on the Malayan peninsula, and four from fresh water-deficient Tulai island 65 km off-shore in the South China Sea. They were fitted with a radio transmitter attached to a thermistor which was inserted into the cloaca of the animals and released...