A model for the noninvasive, habitat-inclusive estimation of upper limit abundance for synanthropes, exemplified by M. fascicularis

Accurately estimating population sizes for free-ranging animals through noninvasive methods, such as camera trap images, remains particularly limited by small datasets. To overcome this, we developed a flexible model for estimating upper limit populations and exemplified it by studying a group-livin...

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Published in:	Science advances Vol. 10; no. 21; p. eadn5390
Main Authors:	Koch Liston, André L, Zhu, Xueying, Bang, Tran V, Phiapalath, Phaivanh, Hun, Seiha, Ahmed, Tanvir, Hasan, Sabit, Biswas, Sajib, Nath, Shimul, Ahmed, Toufique, Ilham, Kurnia, Lwin, Ngwe, Frechette, Jackson L, Hon, Naven, Agger, Cain, Ai, Suzuki, Auda, Emeline, Gazagne, Eva, Kamler, Jan F, Groenenberg, Milou, Banet-Eugene, Sarah, Challis, Neil, Vibol, Neth, Leroux, Nicole, Sinovas, Pablo, Reaksmey, Sophatt, Muñoz, Vanessa H, Lappan, Susan, Zainol, Zaki, Albanese, Valeria, Alexiadou, Athanasia, Nielsen, Daniel R K, Holzner, Anna, Ruppert, Nadine, Briefer, Elodie F, Fuentes, Agustin, Hansen, Malene F
Format:	Journal Article
Language:	English
Published:	United States 24-05-2024
Subjects:	Animals Conservation of Natural Resources - methods Ecosystem Macaca fascicularis Models, Biological Population Density
Online Access:	Get full text
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Summary:	Accurately estimating population sizes for free-ranging animals through noninvasive methods, such as camera trap images, remains particularly limited by small datasets. To overcome this, we developed a flexible model for estimating upper limit populations and exemplified it by studying a group-living synanthrope, the long-tailed macaque ( ). Habitat preference maps, based on environmental and GPS data, were generated with a maximum entropy model and combined with data obtained from camera traps, line transect distance sampling, and direct sightings to produce an expected number of individuals. The mapping between habitat preference and number of individuals was optimized through a tunable parameter ρ (inquisitiveness) that accounts for repeated observations of individuals. Benchmarking against published data highlights the high accuracy of the model. Overall, this approach combines citizen science with scientific observations and reveals the long-tailed macaque populations to be (up to 80%) smaller than expected. The model's flexibility makes it suitable for many species, providing a scalable, noninvasive tool for wildlife conservation.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2375-2548 2375-2548
DOI:	10.1126/sciadv.adn5390