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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Using playback of vocalisations to survey the Nahan's francolin, a threatened African forest galliform
Ostrich, Volume 83, No. 1, Year 2012
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Description
Methods using playback of vocalisations have been widely used to survey elusive birds. Most of these methods suffer from the drawback that movement of birds is often elicited by the sound stimulus used, violating assumptions of distance sampling and generating unknown biases in resulting density estimates. Using playback survey data for a globally threatened forest galliform bird in Uganda, we found evidence of strong movement of birds toward the sound stimulus during playback surveys, and demonstrate that this caused a significant overestimation of bird density. We present a simple regression-based method for identifying and correcting this bias that is statistically robust and practical to implement for those surveying elusive forest birds. Based on our adjusted survey data, we estimate that about 40 000 Nahan's Francolins remain in Uganda. © 2012 Copyright NISC (Pty) Ltd.
Authors & Co-Authors
Fuller, Richard A.
Australia, Brisbane
The University of Queensland
Akite, Perpetra
Uganda, Kampala
Makerere University
Amuno, J. B.
Uganda, Kampala
Makerere University
Fuller, C. L.
Australia, Brisbane
The University of Queensland
Ofwono, J. M.
Uganda, Kampala
Makerere University
Proaktor, G.
United Kingdom, London
Imperial College London
Ssemmanda, R.
Uganda, Kampala
Makerere University
Statistics
Citations: 16
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.2989/00306525.2012.677510
ISSN:
00306525
e-ISSN:
1727947X
Study Design
Cross Sectional Study
Study Approach
Quantitative
Study Locations
Uganda