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  Long-term inference of population size and habitat use in a socially dynamic population of wild western lowland gorillas

Hagemann, L., Arandjelovic, M., Robbins, M. M., Deschner, T., Lewis, M., Froese, G., et al. (2019). Long-term inference of population size and habitat use in a socially dynamic population of wild western lowland gorillas. Conservation Genetics, 20(6), 1303-1314. doi:10.1007/s10592-019-01209-w.

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This article is distributed under the terms of the Crea-tive Commons Attribution 4.0 International License (http://creativecommons .org/licenses/by/4.0/), which permits unrestricted use, distribu- tion, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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 Creators:
Hagemann, Laura1, 2, Author           
Arandjelovic, Milica3, 4, Author                 
Robbins, Martha M., Author
Deschner, Tobias3, 5, Author                 
Lewis, Matthew, Author
Froese, Graden, Author
Boesch, Christophe3, 4, Author                 
Vigilant, Linda6, Author                 
Affiliations:
1The Leipzig School of Human Origins (IMPRS), Max Planck Institute for Evolutionary Anthropology, Max Planck Society, Deutscher Platz 6, 04103 Leipzig, DE, ou_1497688              
2Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497674              
3Chimpanzees, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2149636              
4Great Ape Evolutionary Ecology and Conservation, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, Deutscher Platz 6, 04103 Leipzig, DE, ou_2149638              
5Endocrinology Laboratory, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, Deutscher Platz 6, 04103 Leipzig, DE, ou_2025298              
6Molecular Genetics Laboratory, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2149639              

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 Abstract: Genetic estimation of population sizes has been critical for monitoring cryptic and rare species; however, population estimates do not inherently reveal the permanence or stability of the population under study. Thus, it is important to monitor not only the number of individuals in a population, but also how they are associated in groups and how those groups are distributed across the landscape. Adding to the challenge of obtaining such information with high precision for endangered and elusive species is the need for long-term collection of such data. In this study we compare sampling approaches and genotype non-invasive genetic samples to estimate the number and distribution of wild western lowland gorillas occupying a ˘005Ctextasciitildeþinspace100 km2 area in Loango National Park, Gabon, for the periods 2005–2007 and 2014–2017. Based on the number of genotyped individuals we inferred a minimum of 83 gorillas during the first and 81 gorillas during the second study period. We also obtained similar capture–recapture population size estimates for the two periods despite variance in social dynamics like group formations, group dissolutions and individual dispersal. We furthermore found area fidelity for two groups that were sampled for 10–12 years, despite variation in group membership. Our results revealed how individual movements link groups in a `network' and show that western lowland gorilla populations can show a high degree of temporal and geographic stability concurrent with substantial social dynamics.

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Language(s): eng - English
 Dates: 2019-08-122019-12
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s10592-019-01209-w
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Title: Conservation Genetics
Source Genre: Journal
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Pages: - Volume / Issue: 20 (6) Sequence Number: - Start / End Page: 1303 - 1314 Identifier: ISSN: 1572-9737