Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Listening and watching: do camera traps or acoustic sensors more efficiently detect wild chimpanzees in an open habitat?

Crunchant, AS, Borchers, D, Kuehl, Hjalmar and Piel, AK (2020) Listening and watching: do camera traps or acoustic sensors more efficiently detect wild chimpanzees in an open habitat? Methods in Ecology and Evolution, 11 (4). pp. 542-552. ISSN 2041-210X

[img]
Preview
Text
Listening and watching do camera traps or acoustic sensors more efficiently.pdf - Accepted Version

Download (1MB) | Preview

Abstract

1. With one million animal species at risk of extinction, there is an urgent need to regularly monitor threatened species. However, in practice this is challenging, especially with wide-ranging, elusive and cryptic species or those that occur at low density.
2. Here we compare two non-invasive methods, passive acoustic monitoring (n=12) and camera trapping (n=53), to detect chimpanzees (Pan troglodytes) in a savanna-woodland mosaic habitat at the Issa Valley, Tanzania. With occupancy modelling we evaluate the efficacy of each method, using the estimated number of sampling days needed to establish chimpanzee absence with 95% probability, as our measure of efficacy.
3. Passive acoustic monitoring was more efficient than camera trapping in detecting wild chimpanzees. Detectability varied over seasons, likely due to social and ecological factors that influence party size and vocalization rate. The acoustic method can infer chimpanzee absence with less than ten days of recordings in the field during the late dry season, the period of highest detectability, which was five times faster than the visual method.
4. Synthesis and applications: Despite some technical limitations, we demonstrate that passive acoustic monitoring is a powerful tool for species monitoring. Its applicability in evaluating presence/absence, especially but not exclusively for loud call species, such as cetaceans,
elephants, gibbons or chimpanzees provides a more efficient way of monitoring populations and inform conservation plans to mediate species-loss.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article Crunchant, A‐S, Borchers, D, Kühl, H, Piel, A. Listening and watching: Do camera traps or acoustic sensors more efficiently detect wild chimpanzees in an open habitat?. Methods Ecol Evol. 2020; 11: 542– 552.which has been published in final form at https://doi.org/10.1111/2041-210X.13362. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Uncontrolled Keywords: 0602 Ecology, 0603 Evolutionary Biology, 0502 Environmental Science and Management
Subjects: Q Science > QL Zoology
S Agriculture > SF Animal culture
T Technology > T Technology (General)
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Wiley
Date Deposited: 22 Jan 2020 14:10
Last Modified: 25 Feb 2021 00:50
URI: https://researchonline.ljmu.ac.uk/id/eprint/12083

Actions (login required)

View Item View Item