Amat Ribut
The Bornean monitor lizard (Lanthanotus borneensis) is an endangered species endemic to Borneo. Despite international and national protection, its population and habitat remain largely unknown due to the challenges of traditional survey methods. While previous studies (Yaap et al., 2012; Vergner, 2013; Langner, 2017) have provided some insights, these were primarily based on captive observations. Recent research by Leah et al. (2023) using radio telemetry has shed light on thermoregulation and habitat preference. However, the lack of population data, especially in Kalimantan, a hotspot for poaching, illegal trade, and habitat loss, exacerbates the threat to this species. To address these limitations, this project aims to employ environmental DNA (eDNA) analysis from stream water samples to assess the distribution, habitat condition, and population status of Bornean monitor lizards in West Kalimantan. Traditional methods will also be used to add data on the composition of herpetofauna in the same ecosystem as Lanthanotus borneensis. We hope to gain a comprehensive understanding of this elusive species and inform effective conservation strategies.
Taking a survey of Lanthanotus borneensis and Ansonia latidisca on the border of the Gunung Nyiut Nature Reserve using a traditional method, Visual Encounter Surveys (VES). ©Mohamad Jakaria.
The project will be achieved through the following activities: 1) Project Preparation to obtain a letter of recommendation and/or research permit and manufacture specific primers for detection of Lanthanotus borneensis, 2) Field Surveys will be conducted to take water stream samples for eDNA, other herpetofauna composition surveys, and measurement of environmental characteristics, 3) Herpetofauna Species Assessment for IUCN Redlist and CITES status, 4) Molecular Analysis for detection of all water samples that have been taken using specific primers, 5) Habitat and Population Assessment: habitat conditions will be modeled using positive points of eDNA samples with MaxEnt (Maximum Entropy) application while the population will be seen from several positive samples, 6) Dissemination of Results and Workshop: at the end of the project we will disseminate the results in collaboration with BRIN and BKSDA West Kalimantan.
Header image: Surveying the presence of Lanthanotus borneensis in the Bukit Sanggau Protection Forest. Despite the extensive effort, only one individual was found. ©Mohamad Jakaria.