Long-term monitoring of wildlife populations for protected area management in Southeast Asia



Nuttall MN, Griffin O, Fewster RM, McGowan PJK, Abernethy K, O'Kelly H, Nut M, Sot V & Bunnefeld N (2022) Long-term monitoring of wildlife populations for protected area management in Southeast Asia. Conservation Science and Practice, 4 (2), Art. No.: e614.

Long-term monitoring of biodiversity in protected areas (PAs) is critical to assess threats, link conservation action to species outcomes, and facilitate improved management. Yet, rigorous longitudinal monitoring within PAs is rare. In Southeast Asia (SEA), there is a paucity of long-term wildlife monitoring within PAs, and many threatened species lack population estimates from anywhere in their range, making global assessments difficult. Here, we present new abundance estimates and population trends for 11 species between 2010 and 2020, and spatial distributions for 7 species, based on long-term line transect distance sampling surveys in Keo Seima Wildlife Sanctuary in Cambodia. These represent the first robust population estimates for four threatened species from anywhere in their range and are among the first long-term wildlife population trend analyses from the entire SEA region. Our study revealed that arboreal primates and green peafowl (Pavo muticus) generally had either stable or increasing population trends, whereas ungulates and semiarboreal primates generally had declining trends. These results suggest that ground-based threats, such as snares and domestic dogs, are having serious negative effects on terrestrial species. These findings have important conservation implications for PAs across SEA that face similar threats yet lack reliable monitoring data.

abundance estimates; black-shanked douc; Cambodia; density surface model; distance sampling; Keo Seima Wildlife Sanctuary; population trends; yellow-cheeked crested gibbon

Conservation Science and Practice: Volume 4, Issue 2

FundersAgence Française de Développement, Global Environment Facility and U.S Fish and Wildlife Service
Publication date28/02/2022
Publication date online21/12/2021
Date accepted by journal03/12/2021

People (3)


Professor Katharine Abernethy
Professor Katharine Abernethy

Professor, Biological and Environmental Sciences

Professor Nils Bunnefeld
Professor Nils Bunnefeld

Professor, Biological and Environmental Sciences

Mr Matthew Nuttall
Mr Matthew Nuttall

PhD Researcher, Biological and Environmental Sciences